Absorbent article

Absorbent article

The present invention relates to absorbent articles.

In the case of absorbent articles, such as sanitary napkins, pads, etc., the basic performance improvement is achieved through long-term accumulation of technology development. Compared with before, after absorbing excretions such as menstrual blood, there is little leakage, etc. Further, in pursuit of high functionality, for example, it has a feeling of use similar to that of underwear, and even if the excrement such as menstrual blood is absorbed, the top sheet is still dry. In particular, the menstrual blood during menstruation also contains components such as the endometrium, and its viscosity is high. After seeking to absorb the high-viscosity menstrual blood, there is no stickiness and the top sheet is dry. Further, the high-viscosity menstrual blood often remains in a lump state on the top sheet, and the user often feels unpleasantly visually. From this point of view, it is preferable that the high-viscosity menstrual blood does not remain on the top sheet.

For example, Patent Document 1 discloses that the absorption of cellulose-based hydrophilic fibers containing one or two or more kinds of surfactants selected from the group consisting of a sugar alkyl ether and a sugar fatty acid ester is contained in a portion other than the skin contact surface. article.

Further, Patent Document 2 discloses that an emulsion composition containing a polypropylene glycol material is disposed on an inner surface (a surface on the garment side) of the top sheet, an inner surface (a surface on the body side) of the back sheet, an inner surface of the top sheet, and An absorbent article such as a substrate between the inner surfaces of the back sheets.

Further, Patent Document 3 discloses that the emulsion composition containing a polypropylene glycol material is used for the absorption of the outer surface (face of the body side) of the top sheet. article.

[Previous Technical Literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2008-029830

[Patent Document 2] Special Table 2010-518918

[Patent Document 3] Special Table 2011-510801

<p>However, in the invention described in Patent Document 1, it is attempted to use a surfactant to change the viscosity and surface tension of high-viscosity menstrual blood, thereby accelerating the absorption rate of the liquid, but the effect is insufficient, and after absorbing high-viscosity menstrual blood, Achieve no stickiness and a dry feel on the top sheet. Further, in the invention described in Patent Document 1, since it is necessary to apply the surfactant in an aqueous solution, the subsequent drying step is included, which has a problem of productivity.</p><p>Further, in the inventions described in Patent Documents 2 and 3, the inventors of the present invention have confirmed that the polypropylene glycol material has different absorption capacities due to its molecular weight, and in the low molecular weight polypropylene glycol material, the top sheet remains sticky after absorption of blood. The tendency to red blood that is prone to residual blood.</p><p>Accordingly, the present invention has an object of providing an absorbent article in which the top sheet has no stickiness and the top sheet is dry even after absorbing high-viscosity menstrual blood.</p><p>The present invention further aims to provide an absorbent article in which high-viscosity menstrual blood does not easily remain on the top sheet and is not easily visually unpleasant to the user.</p>

<p>As a result of intensive studies to solve the above problems, the present inventors have found absorption of a top sheet having a liquid permeability, an absorbent body, a liquid-impermeable back sheet, and a second sheet between the top sheet and the absorbent body. The article, wherein the top sheet and the second sheet contain an absorbent article having a water solubility of 0 to 0.60 IOB, a melting point of 45° C. or less, and a water solubility of 0.05 g or less to 100 g of water at 25° C. The above problems have been completed by the present invention.</p>

<p>The absorbent article of the present invention can quickly transfer the menstrual blood through the second sheet to the absorbent body through the second sheet, and the high-viscosity menstrual blood does not easily remain in the top sheet, and the top sheet can be free from stickiness and has a dry feeling.</p><p>Further, in the absorbent article of the present invention, it is difficult to leave a high-viscosity menstrual blood clot on the top sheet, and it is difficult for the user to feel visually unpleasant.</p><heading level="1">[Best Mode for Carrying Out the Invention]</heading><p>The absorbent article of the present invention will be described in detail below.</p><heading level="1">[absorbent article]</heading><p>The absorbent article of the present invention comprises a liquid-permeable top sheet, an absorbent body, a liquid-impermeable back sheet, and a second sheet interposed between the liquid-permeable top sheet and the absorbent body, and the top sheet and the first sheet Two thin The sheet contains a blood modifying agent having an IOB of 0 to 0.60, a melting point of 45 ° C or lower, and a water solubility of 0.05 g or less to 100 g of water at 25 ° C.</p><p>In the absorbent article of the present invention, since both the top sheet and the second sheet contain a blood modifying agent, the chance of contact between the menstrual blood reaching the absorbent article and the blood modifying agent is increased, and the menstrual blood can be further modified. The high-viscosity menstrual blood is not easy to remain in the top sheet, so that the top sheet has no sticky feeling and has a dry feeling. Then, it is considered that the high-viscosity menstrual blood clot is not easily left on the top sheet, and the user is not easily visually unpleasant.</p><p>In the first embodiment of the absorbent article of the present invention, the top sheet has a first region and a second region having a lower liquid permeability than the first region, and the second sheet has the adjacent one in the thickness direction of the absorbent article. The first region of the top sheet and the third region and the fourth region of the second region. The third region of the top sheet and the second sheet contains at least a blood modifying agent to be described later.</p><p>In the above embodiment, the first sheet has a higher liquid permeability than the second region, and the amount of menstrual blood passing through the first region tends to be larger than the amount of menstrual blood passing through the second region. Therefore, since the first region of the top sheet and the third region of the second sheet connecting the thickness direction contain the blood modifying agent, the chance of contact between the blood and the blood modifying agent increases, and the menstrual blood can be further modified, thereby The high-viscosity menstrual blood does not easily remain in the top sheet, and the top sheet has no sticky feeling and has a dry feeling. Then, the high-viscosity menstrual blood clot is not easily left on the top sheet, and the user is not easily visually unpleasant.</p><p>Further, in the above embodiment, in the first region of the top sheet, the blood modifying agent acts on the menstrual blood, and the amount thereof decreases, and the rate of decrease is higher than that of the first sheet. The blood modifying agent in the 2 area is reduced rapidly. Therefore, since the third region of the second sheet contains the blood modifying agent, the long-term high-viscosity menstrual blood does not easily remain in the top sheet, and the top sheet is free from stickiness and has a dry feeling, and then does not easily remain on the top sheet. High-viscosity menstrual blood clots are not easy for the user to feel visually unpleasant.</p><p>In the above embodiment, the top sheet having the first region and the second region having a lower liquid permeability than the first region may be, for example, a top sheet having a flat gradient, that is, the first region has an average ratio of the top sheet. The low-level area of the floor is small, and the second area is the top sheet of the high-pitch area having a larger amount than the average amount of the top sheet. The top sheet having a flatness gradient may, for example, be a top sheet having a fiber density gradient, that is, a top sheet having a fiber density lower than that of the second region in the first region, and a top sheet having a thickness gradient, that is, the first sheet The region is a concave portion, for example, a groove portion, and the second region is a convex portion, for example, a top sheet of the acre portion, and combinations thereof.</p><p>Further, in the above embodiment, the first sheet and the top sheet of the second region having a lower liquid permeability than the first region have the number of the opening portions of the first region than the openings of the second region. A large number of films are top sheets.</p><p>Fig. 1 is a front view of a sanitary napkin according to a first embodiment of the absorbent article of the present invention. The left side of the sanitary napkin 1 shown in Fig. 1 is the front side. The sanitary napkin 1 shown in Fig. 1 has a liquid-permeable top sheet 2, an absorbent body 3, a liquid-impermeable back sheet (not shown), a liquid-permeable top sheet 2, and an absorbent body 3. Two sheets 4. Figure 1 The sanitary napkin 1 further has a side sheet 5 and a press portion 6.</p><p>Further, in the absorbent article of the present invention, the side sheet and the press portion can be omitted.</p><p>Fig. 2 is a cross-sectional view showing a section XX of a portion A of the sanitary napkin 1 shown in Fig. 1. The sanitary napkin 1 shown in Fig. 2 has a liquid-permeable top sheet 2, an absorbent body 3, a liquid-impermeable back sheet 7, a liquid-permeable top sheet 2, and a second sheet 4 between the absorbent members 3. In FIG. 2, the top sheet 2 has the first region 9 and the second region 10 having a lower liquid permeability than the first region, and then the second sheet 4 has the third region adjacent to the first region in the thickness direction of the absorbent article. The region 11 and the fourth region 12 adjacent to the second region.</p><p>Further, in the embodiment shown in Fig. 2, the first region 9 is a low-pitch region having a floor amount smaller than the average amount of the top sheet, and then the second region 10 has a larger average amount than the top sheet. More specifically, the first region 9 has a lower fiber density than the second region 10.</p><p>In the embodiment shown in FIG. 2, the first region 9 and the second region 10 of the top sheet 2 and the third region 11 and the fourth region 12 of the second sheet 4 contain the blood modifying agent 8.</p><p>Further, in the drawing, it is described that the blood modifying agent is spherical, and the surfaces of the top sheet and the second sheet are more specifically present on the surface of the user side, but the shape and distribution of the blood modifying agent are not limited. In the description of the drawing, for example, a blood modifying agent may be present inside the top sheet and/or the second sheet. Moreover, in the drawing, only the first area and the second area of the top sheet are simply indicated. a domain, and a third region of the second sheet and a portion of the fourth region. The same is true below.</p><p>As shown in Fig. 2, in the embodiment in which the first region has a lower fiber density than the second region, it is considered that the menstrual blood reaching the absorbent article during use is easy to have a low fiber density and a small fluid barrier, that is, a high liquid permeability. The first area invades the inside. Therefore, it is considered that the third region adjacent to the first region of the second sheet contains the absorbent article of the blood modifying agent, and the absorbed menstrual blood can be modified without the absorbent article containing the blood modifying agent in the third region.</p><p>In the above embodiment, the top sheet may contain a blood modifying agent in the first region, a blood modifying agent in the second region, and a blood modifying agent in both the first region and the second region. Further, in the above embodiment, as long as the third region contains the blood modifying agent in the second sheet, the fourth region may contain a blood modifying agent or may not be contained. However, from the viewpoint of economy, the amount of the blood modifying agent in the third region is more preferable than the amount of the blood modifying agent in the fourth region. The menstrual blood reaching the absorbent article has a high ratio of the first region of the top sheet to the third region of the second sheet to the absorbent body, and the third region contains a larger amount of blood absorbent than the fourth region, thereby allowing menstrual blood. Efficiently upgraded.</p><p>Fig. 3 is a cross-sectional view showing another embodiment of the absorbent article of the present invention. Fig. 3 is a XX cross section of a portion A of the sanitary napkin 1 shown in Fig. 1. The sanitary napkin 1 shown in Fig. 3 has a liquid-permeable top sheet 2, an absorbent body 3, a liquid-impermeable back sheet 7, a liquid-permeable top sheet 2, and a second sheet 4 between the absorbent members 3. In Fig. 3, the top sheet 2 has a first region 9 and a second region having a lower liquid permeability than the first region. In the field 10, the second sheet 4 has a third region 11 adjacent to the first region and a fourth region 12 adjacent to the second region in the thickness direction of the absorbent article. In the embodiment shown in Fig. 3, as in Fig. 2, the first region 9 is a low-pitch region having a floor amount smaller than the average plateau of the top sheet, and then the second region 10 has an average amount of plate than the top sheet. In the high-level area of the large amount of flat, more specifically, the first area 9 has a lower fiber density than the second area 10.</p><p>In the embodiment shown in Fig. 3, the first region 9 and the second region 10 of the top sheet 2 and the third region 11 and the fourth region 12 of the second sheet 4 contain the blood modifying agent 8, and the third region 11 has a ratio. The amount of the blood modifier in the fourth region 12 is high. In the embodiment shown in Fig. 3, the total amount of the blood modifying agent applied to the second sheet can be reduced and the menstrual blood can be efficiently modified.</p><p>In the absorbent article of the present invention, the amount of the top sheet and the average amount of the sheet are from about 10 to about 100 g/m.²Good, about 15~about 80g/m²Better, then about 20~about 50g/m²Better yet.</p><p>In addition, in this specification, the term "average amount of the top sheet" used for the top sheet which changes the amount of the floor due to the place means that the mass (g) of the entire top sheet is divided by the thickness direction of the absorbent article. Projection area (m²The value of ).</p><p>In addition, the first region is a low-pitch region having a floor amount smaller than the average amount of the top sheet, and the second region is a high-brightness region having a floor amount larger than the average amount of the top sheet. In the form, the first region has a lower than the average amount of the above-mentioned average, preferably from about 1 to about 50 g/m.²More preferably, it is about 5 to about 30 g/m.²The amount of the flat, and then the second area has a higher average than the above The height is preferably from about 1 to about 50 g/m.²More preferably, it is about 5 to about 30 g/m.²The amount of flat. When the difference between the flatness of the first region and the second region is too large, there is a tendency that the top sheet is inferior in feeling and the appearance is poor. When the difference between the amount of the first region and the second region is too small, the difference in liquid permeability is also small, and it is preferable that both the third region and the fourth region of the second sheet contain a blood modifying agent. There are cases where manufacturing costs rise.</p><p>Further, the amount of the first region and the second region can be measured by cutting out a certain area of the top sheet and measuring the mass of the area.</p><p>As shown in FIG. 2 and FIG. 3, in the embodiment in which the first region has a lower fiber density than the second region, the first region preferably has a lower density than the second region of about 0.001 to about 0.1 g/cm.³More preferably, it is about 0.005 to about 0.05 g/cm.³Fiber density. When the difference in density between the first region and the second region is too large, there is a tendency that the top sheet is inferior in feeling and the appearance is poor. When the difference between the density of the first region and the second region is too small, the difference in liquid permeability is also small, and it is preferable that both the third region and the fourth region of the second sheet contain a blood modifying agent. The tendency to increase manufacturing costs.</p><p>The fiber density can be measured by measuring the height of a certain region of the top sheet, cutting the region, and measuring the mass of the region.</p><p>Further, the height can be measured by a laser displacement meter such as a high-precision two-dimensional laser displacement meter LJ-G series (type: LJ-G030) manufactured by KEYENCE Co., Ltd., which will be described later.</p><p>In the absorbent article of the present invention, the second sheet has a basis weight of from about 10 to about 100 g/m.²Better, then about 15~about 80g/m²Better, then about 20~about 50g/m²Better yet. It is because the menstrual blood is quickly moved from the top sheet In order to move the second sheet to the absorber quickly, the second sheet is moved to conceal the menstrual blood or the like which is diffused in the absorber.</p><p>As shown in Fig. 2 and Fig. 3, in the embodiment in which the first region has a lower fiber density than the second region, the top sheet preferably contains about 1 to about 30 g/m.²More preferably, it is about 2 to about 20 g/m.²More preferably, it is about 3 to about 10 g/m.²The amount of blood modifier. The above flat ratio is about 1g/m²When the blood level is low, the effect of the blood reforming tends to be insufficient, and when the amount of the blood modifying agent is increased, the feeling of stickiness in use tends to increase.</p><p>Further, as shown in Fig. 2 and Fig. 3, the first region has a lower fiber density than the second region, and the third region of the second sheet contains from about 0.1 to about 30 g/m.²Preferably, it is from about 1 to about 20 g/m²More preferably, it is about 2 to about 10 g/m.²The amount of blood modifying agent, and then the fourth region of the second sheet contains from about 0 to about 30 g/m²Preferably, it is from about 0 to about 20 g/m²More preferably, it is from about 0 to about 10 g/m.²The amount of blood modifier. This is because the menstrual blood is rapidly moved from the second sheet to the absorber, and the strength of the adhesive for bonding the top sheet and the second sheet is suppressed, and the manufacturing cost is suppressed.</p><p>Moreover, in the present specification, the amount of the blood modifying agent contained in the top sheet or the like can be measured as follows.</p><p>(1) The measurement range of the top sheet or the like is cut out by a sharp knife, for example, using a utility knife so as not to change its thickness as much as possible, and a sample is taken.</p><p>(2) Measuring the area of the sample: TS (m²) and quality: TW₀(g).</p><p>(3) immersing the sample in a solvent that dissolves the blood modifying agent, for example Ethanol, acetone, etc.</p><p>(4) The impregnated sample was dried in an oven at 60 °C.</p><p>(5) Determination of the quality of the sample after drying: TW₁(g).</p><p>(6) The amount of blood modifying agent BS (g/m)²) by the following formula: BS(g/m²)=[TW₀(g)-TW₁(g)]/TS(m²)^＊Also, in order to reduce the error, the total area of the sample does not exceed 100 cm.²In this manner, multiple samples are taken from a plurality of absorbent articles, and the experiments are repeated and their average values are used.</p><p>As shown in FIG. 2 and FIG. 3, the first region has a lower sheet density than the second region, and is disclosed in Japanese Patent Laid-Open No. 2008-138340, the same as No. 2008-264084, and the same as 2008-144322. The specification is manufactured in the same manner as described in the specification of 2008-266813.</p><p>Fig. 4 is a cross-sectional view showing another embodiment of the absorbent article of the present invention. Fig. 4 is a XX cross section of a portion A of the sanitary napkin 1 shown in Fig. 1. The sanitary napkin 1 shown in Fig. 4 has a liquid-permeable top sheet 2, an absorbent body 3, a liquid-impermeable back sheet 7, a liquid-permeable top sheet 2, and a second sheet 4 between the absorbent members 3. In FIG. 4, the top sheet 2 has the first region 9 and the second region 10 having a lower liquid permeability than the first region, and then the second sheet 4 has the third region adjacent to the first region in the thickness direction of the absorbent article. The region 11 and the fourth region 12 adjacent to the second region. In the embodiment shown in Fig. 4, the first region 9 is a low-pitch region having a floor amount smaller than the average plateau of the top sheet, and then the second region 10 is a floor having a larger average amount than the top sheet. In the high-level area, more specifically, the thickness of the first area 9 is thinner than the thickness of the second area 10.</p><p>In the embodiment shown in FIG. 4, the first region 9 and the second region 10 of the top sheet 2 and the third region 11 and the fourth region 12 of the second sheet 4 contain the blood modifying agent 8.</p><p>As shown in Fig. 4, in the embodiment in which the thickness of the first region is thinner than the thickness of the second region, the menstrual blood reaching the absorbent article mainly intrudes into the inside of the absorbent article from the first region having a small thickness. Therefore, the absorbed menstrual blood can be further modified by the third region of the second sheet adjacent to the first region of the top sheet containing the blood modifying agent.</p><p>Further, in the embodiment in which the thickness of the first region is thinner than the thickness of the second region, the "thickness" of the first region and the second region refers to the thinnest thickness in the first region (t in FIG. 4).₁) and the thickest thickness in the second region (t in Figure 4)₂)。 </p><p>The above thickness can be measured in a non-contact manner using a laser displacement meter. The above-mentioned laser displacement meter can be, for example, a high-precision two-dimensional laser displacement meter LJ-G series (type: LJ-G030) manufactured by KEYENCE AG. Specifically, the sample is placed on a horizontal measuring table, and the thickness of the first region and the second region can be measured by measuring the displacement from the measuring table.</p><p>Fig. 5 is a cross-sectional view showing another embodiment of the absorbent article of the present invention. The embodiment shown in Fig. 5 is the same as the embodiment shown in Fig. 4 except for the distribution of the blood modifying agent of the second sheet.</p><p>In the absorbent article shown in Fig. 5, the first region 9 and the second region 10 of the top sheet 2 and the third region 11 of the second sheet 4 contain the blood modifying agent 8, and then the fourth region 12 does not contain blood reforming. Agent. In the embodiment shown in FIG. 5, the amount of the blood modifying agent applied by the second sheet can be reduced and Improve the menstrual blood efficiently.</p><p>As shown in Fig. 4 and Fig. 5, in the embodiment in which the thickness of the first region is thinner than the thickness of the second region, the first region is preferably from about 0.01 to about 5.0 mm, more preferably from about 0.1 to about 2.0 mm. It is preferably thinner than the second region. In the performance range in which the top sheet can be maintained, the larger the difference between the thicknesses of the first region and the second region, the faster the menstrual blood can be moved to the first region.</p><p>As shown in Fig. 4 and Fig. 5, in the embodiment in which the thickness of the first region is thinner than the thickness of the second region, the top sheet preferably contains about 1 to about 30 g/m.²More preferably, it is about 2 to about 20 g/m.²More preferably, it is about 3 to about 10 g/m.²The amount of blood modifier. The above flat ratio is about 1g/m²When there is little, there is a tendency that the blood reforming effect becomes insufficient, and when the amount of the blood modifying agent is increased, there is a tendency that the sticky feeling in use increases.</p><p>Further, as shown in FIG. 4 and FIG. 5, in the embodiment in which the thickness of the first region is thinner than the thickness of the second region, the amount of the blood modifying agent in the third region and the fourth region of the second sheet is the same reason. The same range as the embodiment shown in Figs. 2 and 3 is preferred.</p><p>In still another embodiment of the absorbent article of the present invention, for example, the top sheet is a plurality of grooves extending in the longitudinal direction of the absorbent article in the first region, and the second region is extending in the longitudinal direction of the absorbent article. The plurality of acres, and the above-mentioned acre and ditch are parallel and alternately arranged.</p><p>In still another embodiment of the absorbent article of the present invention, the first region may have an opening portion. When the first region of the top sheet has the opening portion, the menstrual blood that has reached the absorbent article has a large ratio of moving to the absorbent body through the third region of the opening portion and the second sheet. Therefore, it is considered by the second The third region of the sheet contains a blood modifying agent that modifies the absorbed menstrual blood.</p><p>Further, in the embodiment in which the first region has the opening portion, the shape of the opening portion is preferably a slightly circular shape having a diameter of about 0.1 to about 5.0 mm, and then preferably an opening ratio of from about 1 to about 30%. The permeability of menstrual blood during absorption and the menstrual blood absorbed are not easily rewet.</p><p>Further, the opening ratio can be measured by capturing an image of a predetermined area of the top sheet including the plurality of openings, and expanding the image to calculate the area of the opening, and dividing the area of the predetermined area.</p><p>The above top sheet may be in accordance with the specification of JP-A-2008-2034, the specification of the same as No. 2008-23311, the specification of the same as No. 2008-25078, the specification of the same as No. 2008-25079, the same as the number of 2008-25080~the same as No. 2008-25085 The specification is manufactured by the method described in the following JP-A-2008-307179, the specification No. 2009-30218, the specification No. 2011-38211, the specification No. 2011-74515, and the specification No. 2011-80178.</p><heading level="1">[blood modifier]</heading><p>The blood modifying agent has an IOB of from about 0 to about 0.60, a melting point of about 45 ° C or less, and a water solubility of about 0.05 g or less at 25 ° C.</p><p>IOB (Inorganic Organic Balance) is an indicator of the balance between hydrophilicity and lipophilicity. In this specification, it refers to the formula by Oda: IOB = inorganic value / organic value</p><p>The calculated value.</p><p>The inorganic value and the organic value are based on the organic concept map described in the field of "The prediction and organic concept map of organic compounds" by Fujita Mu, Vol. 11, No. 10 (1957) p. 719-725.</p><p>The organic and inorganic values of the main base of Fujita are summarized in Table 1 below.</p><p><tables><img id="" he="1147" wi="1430" file="twi577359b_d0001.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></tables></p><p>For example, in the case of an ester of a carbon number 14 tetradecanoic acid and a carbon number 12 dodecyl alcohol, the organic value is 520 (CH).₂, 20 × 26), the inorganic value is 60 (-COOR, 60 × 1), and IOB = 0.12.</p><p>In the above blood modifying agent, IOB is preferably from about 0 to about 0.60, preferably from about 0 to about 0.50, more preferably from about 0 to about 0.40, and still more preferably from about 0 to about 0.30. It is considered that the lower the IOB, the higher the organicity and the higher affinity with the blood cells.</p><p>In the present specification, the "melting point" refers to the peak top temperature of the endothermic peak when the solid shape changes to a liquid state when measured at a temperature increase rate of 10 ° C /min in a differential scanning calorimeter. For the above melting point, for example, Shimadzu can be used. The DSC-60 type DSC measuring apparatus manufactured by Seiko Co., Ltd. was measured at a temperature increase rate of 10 ° C /min.</p><p>The above blood modifying agent may have a liquid or solid at room temperature if it has a melting point of about 45 ° C or lower, that is, the melting point may have a melting point of about 25 ° C or higher, or about 25 ° C or less, followed by, for example, about -5 ° C. Melting point of -20 ° C, etc. The melting point of the above blood modifying agent is about 45 ° C or lower, as will be described later.</p><p>The above blood modifying agent has no lower limit at its melting point, but preferably has a lower vapor pressure. The vapor pressure of the blood modifying agent is preferably from about 0 to about 200 Pa at 25 ° C (1 atm), more preferably from about 0 to about 100 Pa, more preferably from about 0 to about 10 Pa, still more preferably from about 0 to about 1 Pa. It is then particularly good from about 0.0 to about 0.1 Pa.</p><p>When the absorbent article of the present invention is used in contact with a human body, the vapor pressure is preferably from about 0 to about 700 Pa at 40 ° C (1 atm), more preferably from about 0 to about 100 Pa, and further preferably from about 0 to about 10 Pa. Preferably, it is from about 0 to about 1 Pa, more preferably from about 0.0 to about 0.1 Pa. When the vapor pressure is high, there is a problem that the vaporization during storage, the amount of the blood modifying agent is reduced, and the odor is generated during use.</p><p>Further, the melting point of the blood modifying agent can be used in accordance with the weather, the length of time used, and the like. For example, in an area where the average temperature is below 10 ° C, by using a blood modifying agent having a melting point of about 10 ° C or lower, the blood modifying agent can stably reform the blood even after the menstrual blood is excreted and cooled by the ambient temperature. .</p><p>Further, when the absorbent article is used for a long period of time, the melting point of the blood modifying agent is preferably higher than the range of 45 ° C or lower. Due to the influence of sweating, friction during use, etc., even if it is used for a long time, the blood modifier does not Easy to move.</p><p>The water solubility is 25 ° C, and 0.05 g of the sample is added to 100 g of deionized water, and then allowed to stand for 24 hours. After 24 hours, it is necessary to gently stir, and whether or not the sample has a water content of 0.05 g or less can be determined by dissolution of the sample. Solubility.</p><p>Further, in the present specification, the "solubility" of the water solubility includes a case where the sample is completely dissolved in deionized water to form a homogeneous mixture, and the sample is completely emulsified. Also, "completely" means a mass that has no sample in deionized water.</p><p>In this technical field, the surface of the top sheet is coated with a surfactant for the purpose of changing the surface tension of the blood or the like and rapidly absorbing the blood. However, since the surfactant generally has high water solubility, the top sheet coated with the surfactant tends to have good compatibility with hydrophilic components (plasma, etc.) in the blood, and tends to cause the blood to remain in the top sheet. The blood modifying agent is considered to have a low water solubility, and is different from the conventional surfactant, so that the top sheet is not left in the blood and can be quickly moved to the absorber.</p><p>In the present specification, the solubility in 100 g of water at 25 ° C is referred to as "water solubility".</p><p>The above blood modifying agent may have a water solubility of about 0 g. Therefore, in the above blood modifying agent, the lower limit of the water solubility is about 0 g.</p><p>Examples of the blood modifying agent include compounds having the following structures.</p><p>(i) at least one carbonyl bond (-CO-) between the CC single bond of the hydrocarbon and (ii) hydrocarbon And/or at least one compound of the ether linkage (-O-), or (iii) at least one carbonyl bond (-CO-) and/or at least one ether bond between the CC single bonds of the hydrocarbon (- O-), and a compound in which at least one hydrogen atom on a hydrocarbon is substituted with a carboxyl group (-COOH) or a hydroxyl group (-OH).</p><p>In the present specification, the "hydrocarbon" is a compound composed of carbon and hydrogen, and the chain hydrocarbon may, for example, be a liquid paraffinic hydrocarbon (also referred to as an alkane having no double or triple bond) or an olefinic hydrocarbon (also including one). a double bond olefin), an acetylene hydrocarbon (also known as an alkyne having one triple bond), and a bonded hydrocarbon selected from the group consisting of two or more double bonds and triple bonds, and a cyclic hydrocarbon. For example, aromatic hydrocarbons, alicyclic hydrocarbons.</p><p>The hydrocarbon is preferably a chain hydrocarbon or an alicyclic hydrocarbon, more preferably a chain hydrocarbon, a liquid paraffin hydrocarbon, an olefin hydrocarbon, and a hydrocarbon having two or more double bonds (excluding a triple bond), and further preferably Liquid paraffinic hydrocarbons are the best.</p><p>The chain hydrocarbons include linear hydrocarbons and branched hydrocarbons.</p><p>In the compounds of the above (ii) and (iii), when two or more ether linkages (-O-) are inserted, the ether linkages (-O-) are not adjacent to each other. Therefore, among the compounds of the above (ii) and (iii), the compound in which the ether bond is continuous (that is, a peroxide) is not contained.</p><p>Further, the compound of the above (iii) is a compound in which at least one hydrogen atom on a hydrocarbon is substituted with a hydroxyl group (-OH), compared to a compound in which at least one hydrogen atom on a hydrocarbon is substituted with a carboxyl group (-COOH). Better. As shown in Table 1, when the carboxyl group is bonded to a metal such as menstrual blood, and the inorganic value is greatly increased from 150 to 400 or more, the blood modifying agent having a carboxyl group increases the value of IOB by about 0.6 when used, and has affinity with blood cells. The possibility of reduced sexuality.</p><p>The above blood modifying agent is preferably a compound having the following structure.</p><p>Inserting at least one carbonyl bond (-CO-), at least one ester bond (-COO-), and at least one carbonate bond between (i') hydrocarbon and (ii') hydrocarbon CC single bond ( -OCOO-) and/or at least one ether linkage (-O-) compound or (iii') hydrocarbon CC single bond intercalated with at least one carbonyl bond (-CO-), at least one ester Bonding (-COO-), at least one carbonate linkage (-OCOO-) and/or at least one ether linkage (-O-), and at least one hydrogen atom on the hydrocarbon is carboxyl (-COOH) Or a compound substituted with a hydroxyl group (-OH).</p><p>In the above compounds (ii') and (iii'), when two or more bonds are inserted, that is, in the insertion of a carbonyl bond (-CO-), an ester bond (-COO-), or a carbonate bond When two or more bonds are selected for the knot (-OCOO-) and the ether bond (-O-), the bonds are not adjacent and at least one carbon atom is present between the bonds.</p><p>Preferably, the blood modifying agent further has a carbonyl bond (-CO-) of about 1.8 or less, an ester bond (-COO-) of 2 or less, and a carbonate bond (- for every 10 carbon atoms in the hydrocarbon). OCOO-) is a compound having about 1.5 or less, an ether bond (-O-) of about 6 or less, a carboxyl group (-COOH) of about 0.8 or less, and/or a hydroxyl group (-OH) of about 1.2 or less.</p><p>The above blood modifying agent is further preferably (A) an ester of a compound having 2 to 4 hydroxyl groups and a compound having 1 carboxyl group, (B) a compound having 2 to 4 hydroxyl groups, and a compound having 1 hydroxyl group. ether, (C) an ester of a compound having 2 to 4 carboxyl groups and a compound having 1 hydroxyl group, and (D) a hydrocarbon inserted by a carbonyl bond (-CO-), an ester bond (-COO-), a carbonate bond (-OCOO-) and ether linkage (-O-) selected from any one of the compounds, (E) poly C_2~6An alkanediol, or an ester or ether thereof, or (F) a chain hydrocarbon.</p><p>The following is a detailed description of (A) to (F).</p><heading level="1">[(A) an ester of a compound having 2 to 4 hydroxyl groups and a compound having 1 carboxyl group]</heading><p>In the case of the above-mentioned ester having a compound having 2 to 4 hydroxyl groups and a compound having one carboxyl group (hereinafter, also referred to as "the compound (A)"), a compound having 4, 3 or 2 hydroxyl groups is contained. The ester having a compound having one carboxyl group may not be all esterified in the range of the above IOB, melting point and water solubility.</p><p>The above compound having 2 to 4 hydroxyl groups may, for example, be a chain hydrocarbon tetraol, such as an alkanetetraol, for example, pentaerythritol, a chain hydrocarbon triol, for example, an alkane triol such as glycerin, and a chain hydrocarbon diol such as an alkane. A diol, such as a diol. The compound having one carboxyl group may, for example, be a compound in which one hydrogen atom on a hydrocarbon is substituted with one carboxyl group (-COOH), for example, a fatty acid.</p><p>Compound (A), for example, (A)₁) an ester of a chain hydrocarbon tetraol with a fatty acid, (A₂An ester of a chain hydrocarbon triol with a fatty acid, and (A₃Chain hydrocarbon An ester of a diol with a fatty acid.</p><heading level="1">[(A₁) an ester of a chain hydrocarbon tetraol with a fatty acid]</heading><p>The ester of the above chain hydrocarbon tetraol and a fatty acid may, for example, be represented by the following formula (1):<chemistry general="n"><img id="" he="648" wi="945" file="TWI577359B_D0002.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></chemistry>a tetraester of pentaerythritol and a fatty acid, and the following formula (2):<chemistry general="n"><img id="" he="601" wi="1005" file="TWI577359B_D0003.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></chemistry>a pentaerythritol and a fatty acid triester, the following formula (3):<chemistry general="n"><img id="" he="575" wi="919" file="TWI577359B_D0004.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></chemistry>Diester of pentaerythritol and fatty acid, formula (4):<chemistry general="n"><img id="" he="638" wi="852" file="TWI577359B_D0005.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></chemistry>a monoester of pentaerythritol and a fatty acid.</p><p>(where, R¹~R⁴Each is a chain hydrocarbon)</p><p>a fatty acid constituting the above ester of pentaerythritol and a fatty acid (R¹COOH, R²COOH, R³COOH, and R⁴In terms of COOH), the ester of pentaerythritol and a fatty acid is not particularly limited as long as it satisfies the above requirements of IOB, melting point and water solubility, for example, a saturated fatty acid such as C.₂~C₃₀Saturated fatty acids, such as acetic acid (C₂) (C₂For carbon number, quite R¹C, R²C, R³C or R⁴C carbon number, the same below), propane acid (C₃), butanoic acid (C₄And its isomers, such as 2-methylpropanic acid (C₄), pentanoic acid (C₅And its isomers, such as 2-methylbutanoic acid (C₅), 2,2-dimethylpropane acid (C₅), hexane acid (C₆), heptanoic acid (C₇), octanoic acid (C₈And its isomers, such as 2-ethyl hexane acid (C₈), decanoic acid (C₉), decanoic acid (C₁₀), dodecanoic acid (C₁₂), myristic acid (C₁₄), palmitic acid (C₁₆), heptadecanoic acid (C₁₇), octadecanoic acid (C₁₈), eicosanoic acid (C₂₀), behenic acid (C₂₂), tetracosanoic acid (C₂₄), dihexadecanoic acid (C₂₆),two Octadecanoic acid (C₂₈), triacontanic acid (C₃₀And the like of these isomers (except those above).</p><p>The above fatty acid may in turn be an unsaturated fatty acid. The above unsaturated fatty acid may, for example, be C₃~C₂₀Unsaturated fatty acids, such as monounsaturated fatty acids, such as crotonic acid (C₄), tetradecenoic acid (C₁₄), hexadecenoic acid (C₁₆), oleic acid (C₁₈), trans-octadecenoic acid (C₁₈), octadecenoic acid (C₁₈), eicosenoic acid (C₂₀, eicosenoic acid (C₂₀), etc., diunsaturated fatty acids such as linoleic acid (C₁₈), eicosadienoic acid (C₂₀And other, triunsaturated fatty acids such as linoleic acid, such as alpha-linolenic acid (C₁₈And γ-linolenic acid (C₁₈), pine nut oleic acid (C₁₈), tung oil, such as alpha-ternic acid (C₁₈And β-tungonic acid (C₁₈), mead acid (C₂₀), two-gamma-linolenic acid (C₂₀), eicosatrienoic acid (C₂₀And other, tetra-unsaturated fatty acids, such as stearic acid (C₂₀), arachidonic acid (C₂₀), arachidonic acid (C₂₀), etc., a non-saturated fatty acid, such as bosseopentaenoic acid (C₁₈), eicosapentaenoic acid (C₂₀And so on and some of these hydrogen additions.</p><p>In view of the above-mentioned ester of pentaerythritol and a fatty acid, it is preferable to use an ester of pentaerythritol derived from a saturated fatty acid and a fatty acid, that is, an ester of pentaerythritol and a saturated fatty acid, in consideration of the possibility of denaturation by oxidation or the like.</p><p>Further, in the ester of the pentaerythritol and the fatty acid, in order to make the IOB smaller and more hydrophobic, a diester, a triester or a tetraester is preferred, a triester or a tetraester is more preferable, and a tetraester is preferred.</p><p>The above tetrakis pentaerythritol and a fatty acid tetraester constitute pentaerythritol and fat The total carbon number of the fatty acid of the fatty acid tetraester, that is, in the above formula (1), R¹C, R²C, R³C and R⁴When the total carbon number of the C portion is 15, the IOB becomes 0.60. Therefore, in the case where the above-mentioned pentaerythritol and the fatty acid tetraester have a total carbon number of about 15 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied.</p><p>a tetraester of pentaerythritol and a fatty acid, such as pentaerythritol and hexane acid (C)₆), heptanoic acid (C₇), octanoic acid (C₈), for example with 2-ethyl hexane acid (C₈), decanoic acid (C₉), decanoic acid (C₁₀And/or dodecanoic acid (C₁₂) tetraester.</p><p>In the above-mentioned formula (2), R in the sum of the above-mentioned pentaerythritol and a fatty acid triester constituting the fatty acid triester of pentaerythritol and a fatty acid.¹C, R²C and R³When the total carbon number of the C portion is 19, the IOB becomes 0.58. Therefore, when the total number of carbon atoms of the above-mentioned pentaerythritol and the fatty acid triester and the fatty acid is about 19 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied.</p><p>The sum of the carbon number of the fatty acid which constitutes the diester of pentaerythritol and a fatty acid in the diester of pentaerythritol and a fatty acid, that is, in the above formula (3), R¹C and R²When the total carbon number of the C portion is 22, the IOB becomes 0.59. Therefore, when the total number of carbon atoms of the above-mentioned pentaerythritol and fatty acid diester and fatty acid is about 22 or more, the requirement that IOB is from about 0 to about 0.6 is satisfied.</p><p>In the monoester of pentaerythritol and a fatty acid, the carbon number of the fatty acid constituting the monoester of pentaerythritol and a fatty acid, that is, in the above formula (4), R¹When the carbon number of the C portion is 25, the IOB becomes 0.60. Therefore, in the above-mentioned quarter A monoester of a tetraol and a fatty acid, in the case where the carbon number of the fatty acid is about 25 or more, satisfies the requirement that the IOB is from about 0 to about 0.6.</p><p>Further, in the above calculation, the effects of the double bond, the triple bond, the iso branch, and the tert branch are not considered.</p><p>The commercially available ester of the above-mentioned ester of pentaerythritol and a fatty acid may, for example, be UNISTAR H-408BRS or H-2408BRS-22 (mixed product) (above, manufactured by Nippon Oil Co., Ltd.).</p><heading level="1">[(A₂) an ester of a chain hydrocarbon triol with a fatty acid]</heading><p>The ester of the above-mentioned chain hydrocarbon triol and a fatty acid may, for example, be represented by the following formula (5):<chemistry general="n"><img id="" he="545" wi="768" file="TWI577359B_D0006.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></chemistry>The triglyceride of glycerol and fatty acid, the following formula (6):<chemistry general="n"><img id="" he="571" wi="1297" file="TWI577359B_D0007.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></chemistry>The diester of glycerol and fatty acid, and the following formula (7):<chemistry general="n"><img id="" he="595" wi="1194" file="TWI577359B_D0008.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></chemistry></p><p>(where, R⁵~R⁷Monoesters of glycerol and fatty acids, each of which is a chain hydrocarbon.</p><p>a fatty acid constituting an ester of the above glycerin and a fatty acid (R⁵COOH, R⁶COOH and R⁷In terms of COOH, the ester of glycerin and a fatty acid is not particularly limited as long as it satisfies the above requirements of IOB, melting point and water solubility, for example, "(A₁The fatty acids exemplified in the esters of chain hydrocarbon tetraols and fatty acids, that is, saturated fatty acids and unsaturated fatty acids, in consideration of the possibility of denaturation such as oxidation, the esters of glycerol and fatty acids derived from saturated fatty acids, namely glycerol and Esters of saturated fatty acids are preferred.</p><p>Further, in order to make the IOB smaller and more hydrophobic, the ester of the glycerin and the fatty acid is preferably a diester or a triester, and more preferably a triester.</p><p>The above triglyceride of glycerin and fatty acid is also called triglyceride, and examples thereof include glycerin and octanoic acid (C).₈Triester, glycerol and decanoic acid (C₁₀Triester, glycerol and dodecanoic acid (C₁₂a triester, and a triester of glycerin with two or three fatty acids, and mixtures thereof.</p><p>Examples of the glycerin and the triester of two or more kinds of fatty acids include glycerin and octanoic acid (C).₈And decanoic acid (C₁₀Triester, glycerol and octanoic acid (C₈), decanoic acid (C₁₀And dodecanoic acid (C₁₂Triester, glycerol and octanoic acid (C₈), decanoic acid (C₁₀Dodecanoic acid (C₁₂), myristic acid (C₁₄), palmitic acid (C₁₆And octadecanoic acid (C₁₈Triester and the like.</p><p>In the above-mentioned glycerin and a fatty acid triester, in order to make the melting point be lower than about 45 ° C, the total number of carbon atoms of the fatty acid constituting the glycerin and the fatty acid triester, that is, in the formula (5), R⁵C, R⁶C and R⁷The total carbon number of the C portion is preferably about 40 or less.</p><p>Further, in the above-mentioned glycerin and fatty acid triester, the total number of carbon atoms of the fatty acid constituting the triester of glycerin and fatty acid, that is, in the formula (5), R⁵C, R⁶C and R⁷When the total carbon number of the C portion is 12, the IOB becomes 0.60. Therefore, when the total number of carbon atoms of the glycerin and the fatty acid triester and the fatty acid is about 12 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied.</p><p>The above-mentioned triglyceride of glycerin and fatty acid is also a fat, because it can constitute a component of the human body, and is preferable from the viewpoint of safety.</p><p>The commercially available product of the above-mentioned glycerin and fatty acid triester may, for example, be tricocohol fatty acid glyceride, NA36, Panaseate 800, Panasete 800B, and Panaseate 810S, and tri-C2L oil fatty acid glyceride and tri-CL oil fatty acid glyceride (above, Nippon Oil Co., Ltd.) Company system) and so on.</p><p>The diglyceride of the above glycerin and fatty acid is also called diglyceride, and examples thereof include glycerin and decanoic acid (C).₁₀Diester, glycerol and dodecanoic acid (C₁₂Diester, glycerol and palmitic acid (C₁₆a diester, and a diester of glycerin and two fatty acids, and mixtures thereof.</p><p>In the above diglyceride and glycerin, the total number of carbon atoms of the fatty acid constituting the diester of glycerin and fatty acid, that is, in the formula (6), R⁵C and R⁶C When the total carbon number is 16, the IOB becomes 0.58. Therefore, when the total number of carbon atoms of the glycerin and the fatty acid diester and the fatty acid is about 16 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied.</p><p>The monoester of the above glycerin and fatty acid is also called a monoglyceride, and for example, glycerol eicosanoic acid (C₂₀Monoester, glycerol, behenic acid (C₂₂) Monoester and the like.</p><p>In the monoester of glycerin and a fatty acid, the carbon number of the fatty acid constituting the monoester of glycerin and a fatty acid, that is, in the formula (7), R⁵When the carbon number of the C portion is 19, the IOB becomes 0.59. Therefore, in the case where the carbonic acid has a carbon number of about 19 or more in the monoester of the glycerin and the fatty acid, the requirement that the IOB is from about 0 to about 0.6 is satisfied.</p><heading level="1">[(A₃) an ester of a chain hydrocarbon diol and a fatty acid]</heading><p>The ester of the above chain hydrocarbon diol and a fatty acid may, for example, be C.₂~C₆Chain hydrocarbon diol, such as C₂~C₆a monoester or diester of a diol such as ethylene glycol, propylene glycol, butylene glycol, pentanediol or hexanediol with a fatty acid.</p><p>Specifically, the ester of the above chain hydrocarbon diol and a fatty acid may, for example, be represented by the following formula (8): R⁸COOC_kH_2kOCOR⁹ (8) </p><p>(where k is an integer from 2 to 6, followed by R⁸And R⁹Each is a chain hydrocarbon)₂~C₆a diester of a diol and a fatty acid, and the following formula (9): R⁸COOC_kH_2kOH (9)</p><p>(where k is an integer from 2 to 6, followed by R⁸Chain hydrocarbon C₂~C₆a monoester of a diol and a fatty acid.</p><p>Above C₂~C₆Among the esters of diols and fatty acids, the fatty acids to be esterified (in the formulas (8) and (9), are equivalent to R⁸COOH and R⁹COOH), C₂~C₆The ester of a diol and a fatty acid is not particularly limited as long as it satisfies the requirements of the above IOB, melting point and water solubility, for example, "(A₁The fatty acids listed in the "esters of chain hydrocarbon tetraols and fatty acids", that is, saturated fatty acids and unsaturated fatty acids, are preferably saturated with fatty acids in consideration of the possibility of denaturation such as oxidation.</p><p>Butanediol (k=4) and diester of fatty acid represented by formula (8), R⁸C and R⁹When the total carbon number of the C portion is 6, the IOB becomes 0.6. Therefore, in the case where the butanediol (k=4) represented by the formula (8) and the diester of the fatty acid have a total carbon number of about 6 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied. Further, the ethylene glycol (k=2) represented by the formula (9) and the monoester of the fatty acid, R⁸When the carbon number of the C portion is 12, the IOB becomes 0.57. Therefore, in the case where the ethylene glycol (k=2) represented by the formula (9) and the monoester of the fatty acid and the carbon number of the fatty acid are about 12 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied.</p><p>Above C₂~C₆For the esters of diols and fatty acids, consider the possibility of denaturation such as oxidation, with C derived from saturated fatty acids.₂~C₆Ester of diol and fatty acid, ie C₂~C₆Esters of diols and saturated fatty acids are preferred.</p><p>Also, the above C₂~C₆In terms of esters of diols and fatty acids, in order to make IOB smaller and more hydrophobic, esters of diols and fatty acids derived from diols having a large carbon number, such as from butanediol, pentanediol or hexanediol. Esters of diols and fatty acids are preferred.</p><p>Further, the above C₂~C₆In terms of the ester of a diol and a fatty acid, in order to make the IOB smaller and more hydrophobic, a diester is preferred.</p><p>Above C₂~C₆For example, a commercial product of a diol and a fatty acid ester may be, for example, a Coomapo BL or a Cotomboru BS (above, manufactured by Nippon Oil Co., Ltd.).</p><heading level="1">[(B) an ether having a compound having 2 to 4 hydroxyl groups and a compound having 1 hydroxyl group]</heading><p>An ether having a compound having 2 to 4 hydroxyl groups and a compound having one hydroxyl group (hereinafter, also referred to as "the compound (B)"), and a compound having 4, 3 or 2 hydroxyl groups An ether having a compound having one hydroxyl group may not be etherified in a range having the above IOB, melting point, and water solubility.</p><p>The above compound having 2 to 4 hydroxyl groups is exemplified by "compound (A)", for example, pentaerythritol, glycerin, and diol.</p><p>The compound having one hydroxyl group may, for example, be a compound in which one hydrogen atom of a hydrocarbon is substituted with one hydroxyl group (-OH), for example, an aliphatic monovalent alcohol such as a saturated aliphatic monovalent alcohol and an unsaturated aliphatic group 1 Valence alcohol.</p><p>The above saturated aliphatic monovalent alcohol may, for example, be C₁~C₂₀a saturated aliphatic monovalent alcohol such as methyl alcohol (C₁) (C₁For carbon number, the same below), ethyl alcohol (C₂), propyl alcohol (C₃And its isomers, such as isopropyl alcohol (C₃), butyl alcohol (C₄And its isomers, such as sec-butyl alcohol (C₄And tert-butyl alcohol (C₄), pentyl alcohol (C₅), hexyl alcohol (C₆), heptyl alcohol (C₇), octyl alcohol (C₈And its isomers, for example 2-ethylhexyl alcohol (C₈), mercapto alcohol (C₉), mercapto alcohol (C₁₀), dodecyl alcohol (C₁₂), tetradecyl alcohol (C₁₄), hexadecanol (C₁₆), heptadecyl alcohol (C₁₇), octadecyl alcohol (C₁₈) and eicosyl alcohol (C₂₀), and such unspecified isomers.</p><p>The unsaturated aliphatic monovalent alcohol is one in which one of the CC single bonds of the above saturated aliphatic monovalent alcohol is substituted with a C=C double bond, such as an oleyl alcohol, for example, the Rikacol series and the new Japanese physicochemical company. The name of the Czech Republic series is commercially available.</p><p>Compound (B), for example, (B)₁An ether of a chain hydrocarbon tetraol and an aliphatic monovalent alcohol, such as a monoether, a diether, a triether and a tetraether, preferably a diether, a triether and a tetraether, more preferably a triether and a tetraether, Preferred is tetraether, (B₂An ether of a chain hydrocarbon triol and an aliphatic monovalent alcohol, such as a monoether, a diether and a triether, preferably a diether and a triether, more preferably a triether, and (B)₃An ether of a chain hydrocarbon diol and an aliphatic monovalent alcohol, such as a monoether and a diether, followed by a diether.</p><p>Examples of the ether of the chain hydrocarbon tetraol and the aliphatic monovalent alcohol include the following formulas (10) to (13):<chemistry general="n"><img id="" he="687" wi="1835" file="TWI577359B_D0009.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></chemistry><chemistry general="n"><img id="" he="488" wi="1756" file="TWI577359B_D0010.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></chemistry></p><p>(where, R¹⁰~R¹³Each is a chain hydrocarbon). Pentaerythritol and tetraethers, triethers, diethers and monoethers of aliphatic monovalent alcohols.</p><p>Examples of the ether of the chain hydrocarbon triol and the aliphatic monovalent alcohol include the following formulas (14) to (16):<chemistry general="n"><img id="" he="1314" wi="1156" file="TWI577359B_D0011.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></chemistry></p><p>(where, R¹⁴~R¹⁶Each is a chain hydrocarbon). The glycerol and the trivalent ether, diether and monoether of the aliphatic monovalent alcohol.</p><p>The ether of the above chain hydrocarbon diol and the aliphatic monovalent alcohol may, for example, be represented by the following formula (17): R¹⁷OC_nH_2nOR¹⁸ (17) </p><p>(where n is an integer from 2 to 6, followed by R¹⁷And R¹⁸Each is a chain hydrocarbon)₂~C₆a diether of a diol and an aliphatic monovalent alcohol, and the following formula (18): R¹⁷OC_nH_2nOH (18)</p><p>(where n is an integer from 2 to 6, followed by R¹⁷C for chain hydrocarbons)₂~C₆a monoether of a diol and an aliphatic monovalent alcohol.</p><p>The total number of carbon atoms of the aliphatic monovalent alcohol constituting the tetraether of the pentaerythritol and the aliphatic monovalent alcohol in the tetraether of the pentaerythritol and the aliphatic monovalent alcohol, that is, in the above formula (10), R¹⁰, R¹¹, R¹²And R¹³When the total carbon number is 4, the IOB becomes 0.44. Therefore, when the total number of carbon atoms of the above-mentioned pentaerythritol and the aliphatic monovalent alcohol and the aliphatic monovalent alcohol is about 4 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied.</p><p>In the above formula (11), R is a combination of the above-mentioned pentaerythritol and an aliphatic monovalent alcohol triether which constitutes an aliphatic monovalent alcohol of pentaerythritol and a trivalent ether of an aliphatic monovalent alcohol.¹⁰, R¹¹And R¹²When the total carbon number is 9, the IOB becomes 0.57. Therefore, when the total number of carbon atoms of the above-mentioned pentaerythritol and the aliphatic monovalent alcohol triad constituting the aliphatic monovalent alcohol is about 9 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied.</p><p>The total number of carbon atoms of the aliphatic monovalent alcohol constituting the diether of pentaerythritol and the aliphatic monovalent alcohol in the diether of the pentaerythritol and the aliphatic monovalent alcohol, that is, in the above formula (12), R¹⁰And R¹¹When the total carbon number is 15, the IOB becomes 0.60. Therefore, in the diether of the pentaerythritol and the aliphatic monovalent alcohol, the carbon number of the aliphatic monovalent alcohol is about 15 or more in total. Occasionally, the requirement that the IOB is about 0 to about 0.6 is satisfied.</p><p>In the monoether of the above pentaerythritol and the aliphatic monovalent alcohol, the carbon number of the aliphatic monovalent alcohol constituting the monoether of the pentaerythritol and the aliphatic monovalent alcohol, that is, in the above formula (13), R¹⁰When the carbon number of the part is 22, the IOB becomes 0.59. Therefore, when the monoether of the pentaerythritol and the aliphatic monovalent alcohol forms an aliphatic monovalent alcohol having a carbon number of about 22 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied.</p><p>Further, in the above-mentioned triglyceride of glycerin and an aliphatic monovalent alcohol, the total number of carbon atoms of the aliphatic monovalent alcohol constituting the triether of glycerin and the aliphatic monovalent alcohol, that is, in the formula (14), R¹⁴, R¹⁵And R¹⁶When the total carbon number is 3, the IOB becomes 0.50. Therefore, when the total amount of carbon atoms of the glycerin and the aliphatic monovalent alcohol triol constituting the aliphatic monovalent alcohol is about 3 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied.</p><p>The total number of carbon atoms of the aliphatic monovalent alcohol constituting the diglyceride of the glycerin and the aliphatic monovalent alcohol, and the total number of carbon atoms of the aliphatic monovalent alcohol constituting the diether of the aliphatic monovalent alcohol, that is, in the formula (15), R¹⁴And R¹⁵When the total carbon number is 9, the IOB becomes 0.58. Therefore, when the total number of carbon atoms of the glycerin and the aliphatic monovalent alcohol and the aliphatic monovalent alcohol is about 9 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied.</p><p>In the monoether of the glycerin and the aliphatic monovalent alcohol, the carbon number of the aliphatic monovalent alcohol constituting the monoether of glycerin and the aliphatic monovalent alcohol, that is, in the formula (16), R¹⁴When the carbon number of the part is 16, the IOB becomes 0.58. Therefore, when the monoether of the glycerin and the aliphatic monovalent alcohol forms an aliphatic monovalent alcohol having a carbon number of about 16 or more, the requirement that the IOB is from about 0 to about 0.6 is satisfied.</p><p>Butanediol (n=4) represented by formula (17) and diester of aliphatic monovalent alcohol, R¹⁷And R¹⁸When the total carbon number is 2, the IOB becomes 0.33. Therefore, when the total number of carbon atoms of the dibutyl diol (n = 4) represented by the formula (17) and the aliphatic monovalent alcohol and the aliphatic monovalent alcohol is 2 or more, the IOB is satisfied to be about 0 to about The requirements of 0.6. Further, a glycol (n=2) represented by the formula (18) and a monoether of an aliphatic monovalent alcohol, R¹⁷When the carbon number of the part is 8, the IOB becomes 0.60. Therefore, in the case where the ethylene glycol (n=2) represented by the formula (18) and the monoether of the aliphatic monovalent alcohol and the aliphatic monovalent alcohol have a carbon number of about 8 or more, the IOB is satisfied to be about 0 to about The requirements of 0.6.</p><p>In the case of the compound (B), a compound having two or four hydroxyl groups and a compound having one hydroxyl group such as an aliphatic monovalent alcohol can be produced by dehydration condensation in the presence of an acid catalyst.</p><heading level="1">[(C) an ester of a compound having 2 to 4 carboxyl groups and a compound having 1 hydroxyl group]</heading><p>The ester having a compound having 2 to 4 carboxyl groups and a compound having one hydroxyl group (hereinafter, also referred to as "the compound (C)") contains a compound having 4, 3 or 2 carboxyl groups and An ester having a compound having one hydroxyl group may not be esterified in a range having the above IOB, melting point, and water solubility.</p><p>The compound having 2 to 4 carboxyl groups may, for example, be a chain hydrocarbon having 2 to 4 carboxyl groups, for example, a chain hydrocarbon dicarboxylic acid such as an alkane dicarboxylic acid such as ethanedioic acid, propane diacid or butane. Diacid, pentanedioic acid, hexanedioic acid, heptanedioic acid, octanedioic acid, decanedioic acid and decanedioic acid, chain hydrocarbon a tricarboxylic acid, such as an alkane tricarboxylic acid, such as propane triacid, butane tricarboxylic acid, pentane tricarboxylic acid, hexane tricarboxylic acid, heptane tricarboxylic acid, octane tricarboxylic acid, decanetricarboxylic acid, and decanetricarboxylic acid, And a chain hydrocarbon tetracarboxylic acid such as an alkanetetracarboxylic acid such as butanetetracarboxylic acid, pentanetetracarboxylic acid, hexanetetracarboxylic acid, heptanetetracarboxylic acid, octane tetracarboxylic acid, decanetetracarboxylic acid, and decanetetracarboxylic acid.</p><p>Further, among the compounds having 2 to 4 carboxyl groups, a hydroxy acid having 2 to 4 carboxyl groups, an alkoxy acid having 2 to 4 carboxyl groups such as malic acid, tartaric acid, citric acid or isocitric acid, for example, O-acetyl citrate, and a pendant acid having 2 to 4 carboxyl groups.</p><p>The compound having one hydroxyl group is exemplified by the term "compound (B)", and examples thereof include aliphatic monovalent alcohols.</p><p>As the compound (c), for example, (C)₁An ester of a chain hydrocarbon tetracarboxylic acid having four carboxyl groups, a hydroxy acid, an alkoxy acid or a pendant acid with an aliphatic monovalent alcohol, such as a monoester, a diester, a triester or a tetraester, preferably Diesters, triesters and tetraesters, more preferably triesters and tetraesters, more preferably tetraesters, (C₂An ester of a chain hydrocarbon tricarboxylic acid having three carboxyl groups, a hydroxy acid, an alkoxy acid or a pendant acid with an aliphatic monovalent alcohol, such as a monoester, a diester or a triester, preferably a diester and a triester, more preferably a triester, and (C₃An ester of a chain hydrocarbon dicarboxylic acid having two carboxyl groups, a hydroxy acid, an alkoxy acid or a pendant acid and an aliphatic monovalent alcohol, for example, a monoester or a diester, preferably a diester.</p><p>Examples of the compound (C) include dioctyl adipate, diisostearyl malate, tributyl citrate, and O-ethyl decyl tributyl citrate. Sale.</p><heading level="1">[(D) Hydrocarbon insertion is selected from a group consisting of an ether bond (-O-), a carbonyl bond (-CO-), an ester bond (-COO-), and a carbonate bond (-OCOO-) Any one of the compounds]</heading><p>Any one selected from the group consisting of an ether bond (-O-), a carbonyl bond (-CO-), an ester bond (-COO-), and a carbonate bond (-OCOO-) is inserted into the above hydrocarbon. For the compound (hereinafter, also referred to as the case of the compound (D)", for example, (D)₁An ether of an aliphatic monovalent alcohol and an aliphatic monovalent alcohol, (D₂Dialkyl ketone, (D₃An ester of a fatty acid with an aliphatic monovalent alcohol, and (D)₄Dialkyl carbonate.</p><heading level="1">[(D₁) an ether of an aliphatic monovalent alcohol and an aliphatic monovalent alcohol]</heading><p>The ether of the above aliphatic monovalent alcohol and the aliphatic monovalent alcohol may, for example, have the following formula (19): R¹⁹OR²⁰ (19) </p><p>(where, R¹⁹And R²⁰Compounds each being a chain hydrocarbon).</p><p>An aliphatic monovalent alcohol constituting the above ether (in the formula (19), equivalent to R¹⁹OH and R²⁰In the case of OH), the above-mentioned ether is not particularly limited as long as it satisfies the requirements of the above-mentioned IOB, the melting point and the water solubility, and examples thereof include the aliphatic monovalent alcohol exemplified in the item "Compound (B)".</p><p>In the ether of the aliphatic monovalent alcohol and the aliphatic monovalent alcohol, the total number of carbon atoms of the aliphatic monovalent alcohol constituting the ether, that is, in the above formula (19), R¹⁹And R²⁰When the total carbon number is 2, the IOB is 0.50. Therefore, if the total number of carbon atoms is about 2 or more, the requirements of the above IOB are satisfied. But, on The total carbon number is about 6, and the water solubility is about 2 g higher, which is also problematic from the viewpoint of vapor pressure. In order to satisfy the requirement that the water solubility is about 0.05 g or less, the total carbon number is preferably about 8 or more.</p><heading level="1">[(D₂Dialkyl ketone]</heading><p>The above dialkyl ketone may, for example, have the following formula (20): R²¹COR²² (20) </p><p>(where, R²¹And R²²Compounds each of which is an alkyl group.</p><p>Due to the above dialkyl ketone, R²¹And R²²When the total carbon number is 5, the IOB is 0.54. Therefore, if the total carbon number is about 5 or more, the above-mentioned IOB requirements are satisfied. However, the above carbon number is about 5 in total, and the water solubility is about 2 g. Therefore, in order to satisfy the requirement that the water solubility is about 0.05 g or less, the total carbon number is preferably about 8 or more. Further, when the vapor pressure is considered, the carbon number is preferably about 10 or more, and then about 12 or more.</p><p>Further, when the total carbon number is about 8, for example, 5-nonanone has a melting point of about -50 ° C and a vapor pressure of about 230 Pa at 20 ° C.</p><p>The above dialkyl ketone can be obtained by a conventional method, for example, by oxidizing a second-stage alcohol with chromic acid or the like, in addition to a commercially available one.</p><heading level="1">[(D₃) esters of fatty acids with aliphatic monovalent alcohols]</heading><p>The ester of the above fatty acid and the aliphatic monovalent alcohol may, for example, have the following formula (21): R²³COOR²⁴ (21) </p><p>(where, R²³And R²⁴Compounds each being a chain hydrocarbon).</p><p>a fatty acid constituting the above ester (in the formula (21), equivalent to R²³COOH), for example, "(A₁The fatty acid listed in the ester of a chain hydrocarbon tetraol and a fatty acid, that is, a saturated fatty acid or an unsaturated fatty acid is preferably a saturated fatty acid in consideration of the possibility of denaturation such as oxidation. An aliphatic monovalent alcohol constituting the above ester (in the formula (21), equivalent to R²⁴OH), for example, an aliphatic monovalent alcohol exemplified in the item "Compound (B)".</p><p>Further, in the ester of the fatty acid and the aliphatic monovalent alcohol, the total number of carbon atoms of the fatty acid and the aliphatic monovalent alcohol, that is, in the formula (21), R²³C and R²⁴When the total carbon number is 5, the IOB becomes 0.60, so R²³C and R²⁴When the total carbon number is about 5 or more, the requirements of the above IOB are satisfied. However, for example, in the case of the above-mentioned butyl acetate having a total carbon number of 6, the vapor pressure is as high as more than 2,000 Pa. Therefore, when the vapor pressure is considered, the total carbon number is preferably about 12 or more. Further, when the total carbon number is about 11 or more, the water solubility is about 0.05 g or less.</p><p>Examples of the ester of the above fatty acid and an aliphatic monovalent alcohol include, for example, dodecanoic acid (C).₁₂) with dodecyl alcohol (C₁₂Ester, myristic acid (C₁₄) with dodecyl alcohol (C₁₂For example, an ester of the above-mentioned fatty acid and an ester of an aliphatic monovalent alcohol, for example, Eretru WE20 and Eretru WE40 (above, manufactured by Nippon Oil Co., Ltd.).</p><heading level="1">[(D₄Dialkyl carbonate]</heading><p>The above dialkyl carbonate may, for example, have the following formula (22): R²⁵OC(=O)OR²⁶ (22) </p><p>(where, R²⁵And R²⁶Compounds each of which is an alkyl group.</p><p>In the above dialkyl carbonate, due to R²⁵And R²⁶When the total carbon number is 6, the IOB becomes 0.57, so R²⁵And R²⁶If the total carbon number is about 6 or more, the requirements of the IOB are satisfied.</p><p>If you consider the solubility of water, then R²⁵And R²⁶The total carbon number is preferably about 7 or more, more preferably about 9 or more.</p><p>The above dialkyl carbonates can be synthesized by the reaction of phosgene with an alcohol, the reaction of a chlorinated formate with an alcohol or an alkoxide, and the reaction of silver carbonate with an alkyl iodide, in addition to those commercially available.</p><heading level="1">[(E) Poly C_2~6Alkanediol, or its ester or ether]</heading><p>The above poly C_2~6In the case of an alkanediol, or an ester or an ether thereof (hereinafter, a case where the compound (E) is referred to), for example, (E)₁)C_2~6Alkanediol, (E₂)C_2~6Ester of alkanediol and fatty acid, (E₃)C_2~6Alkenyl diol and ether of aliphatic monovalent alcohol, (E₄)C_2~6An ester of an alkanediol with a chain hydrocarbon tetracarboxylic acid, a chain hydrocarbon tricarboxylic acid, or a chain hydrocarbon dicarboxylic acid, and (E₅)C_2~6An ether of an alkanediol with a chain hydrocarbon tetraol, a chain hydrocarbon triol, or a chain hydrocarbon diol. The following is explained.</p><heading level="1">[(E₁)C_2~6Alkanediol</heading><p>The above poly C_2~6In alkanediol, not only a homopolymer of a single diol, A copolymer of two or more kinds of diols and a random polymer are also included. The type of diol, for example, C_2~6Alkylene glycol, that is, ethylene glycol, propylene glycol, butylene glycol, pentanediol, or hexanediol. The above diol species are reduced by poly C_2~6The IOB viewpoint of the alkanediol is preferably propylene glycol, butylene glycol, pentanediol or hexanediol, butylene glycol, pentanediol or hexanediol.</p><p>Also, in this specification, "poly C_2~6Alkanediol" is C_2~6a homopolymer of any one selected from the group consisting of alkanediol, that is, ethylene glycol, propylene glycol, butanediol, pentanediol, and hexanediol, and two or more copolymers selected from the above group, Or two or more kinds of random polymers selected by the above group.</p><p>The above poly C_2~6Where alkanediol is a homopolymer, poly C_2~6The alkanediol can have the following formula (23): HO-(C)_mH_2mO)_n-H (23) indicates.</p><p>Moreover, the inventors of the present invention confirmed that when polyethylene glycol (in the case of the formula (23), when m=2 is equivalent), n45 (weight average molecular weight is more than 2,000), the IOB satisfying about 0 to about 0.60 is satisfied. The requirements, but even where the weight average molecular weight exceeds about 4,000, the water solubility requirements are not met. Therefore, think (E₁)C_2~6a homopolymer containing no ethylene glycol in the alkanediol, and a copolymer of ethylene glycol as a copolymer with other diols or a random polymer, which should be included in (E)₁)C_2~6Alkanediol.</p><p>Therefore, the homopolymer of the formula (23) may contain a homopolymer of propylene glycol, butanediol, pentanediol or hexanediol.</p><p>From the above, in the formula (23), m is from about 3 to about 6, more preferably from about 4 to about 6, and then n is 2 or more.</p><p>In the above formula (23), the value of n is poly C._2~6The alkanediol has a value of from about 0 to about 0.60 IOB, a melting point of about 45 ° C or less, and a water solubility of about 0.05 g or less to 100 g of water at 25 ° C.</p><p>For example, when the formula (23) is polypropylene glycol (m = 3), when n = 12, the IOB is 0.58. Therefore, when the formula (23) is a polypropylene glycol (m = 3), when the m is about 12, the above requirements of the IOB are satisfied.</p><p>Further, when the formula (23) is polytetramethylene glycol (m = 4), when n = 7, the IOB is 0.57. Therefore, when the formula (23) is a polytetramethylene glycol (m = 4), when n is about 7, the above-mentioned requirements of the IOB are satisfied.</p><p>From the point of view of IOB, melting point and water solubility, poly C_4~6The weight average molecular weight of the alkanediol is preferably in the range of from about 200 to about 10,000, more preferably from about 250 to about 8,000, still more preferably from about 250 to about 5,000.</p><p>Also, from the viewpoint of IOB, melting point and water solubility, poly C₃The weight average molecular weight of the alkanediol, i.e., polypropylene glycol, is preferably from about 1,000 to about 10,000, more preferably from about 3,000 to about 8,000, still more preferably from about 4,000 to about 5,000. When the weight average molecular weight is less than about 1,000, the water solubility does not conform to the requirements, and the larger the weight average molecular weight, the more the absorbent moving speed and the whiteness of the top sheet tend to increase.</p><p>The above poly C_2~6Commercially available products of alkanediols include, for example, Uniol (trademark) D-1000, D-1200, D-2000, D-3000, D-4000, PB-500, PB-700, PB-1000 and PB-2000. (above, by Nippon Oil Co., Ltd.).</p><heading level="1">[(E₂)C_2~6Ester of alkanediol and fatty acid]</heading><p>The above poly C_2~6For the ester of an alkanediol and a fatty acid, for example, "(E₁)C_2~6Polyalkylene_2~6One or both of the OH ends of the alkanediol are esterified with fatty acids, i.e., monoesters and diesters.</p><p>Poly C_2~6Among the esters of the alkanediol and the fatty acid, the fatty acid to be esterified may, for example, "(A)₁The fatty acid listed in the ester of a chain hydrocarbon tetraol and a fatty acid, that is, a saturated fatty acid or an unsaturated fatty acid is preferably a saturated fatty acid in consideration of the possibility of denaturation such as oxidation.</p><p>The above poly C_2~6A commercially available product of an ester of an alkanediol and a fatty acid is, for example, WILBRIDE cp9 (manufactured by Nippon Oil Co., Ltd.).</p><heading level="1">[(E₃)C_2~6Ether of alkanediol and aliphatic monovalent alcohol]</heading><p>The above poly C_2~6An ether of an alkanediol and an aliphatic monovalent alcohol, for example, "(E₁)C_2~6Polyalkylene_2~6One or both of the OH end of the alkanediol is etherified with an aliphatic monovalent alcohol, i.e., a monoether and a diether.</p><p>Poly C_2~6In the ether of the alkanediol and the aliphatic monovalent alcohol, the aliphatic monovalent alcohol to be etherified may, for example, be an aliphatic monovalent alcohol as listed in the "compound (B)".</p><heading level="1">[(E₄)C_2~6An ester of an alkanediol with a chain hydrocarbon tetracarboxylic acid, a chain hydrocarbon tricarboxylic acid, or a chain hydrocarbon dicarboxylic acid]</heading><p>The above poly C_2~6Alkanediol and chain hydrocarbon tetracarboxylic acid, chain hydrocarbon tricarboxylate Among the esters of acid or chain hydrocarbon dicarboxylic acids, the poly C to be esterified_2~6Alkanediol, for example, "(E₁)C_2~6Polyalkylene_2~6Alkanediol. Further, the chain hydrocarbon tetracarboxylic acid, the chain hydrocarbon tricarboxylic acid, and the chain hydrocarbon dicarboxylic acid to be esterified may, for example, be described in the "compound (C)".</p><p>The above poly C_2~6An ester of an alkanediol with a chain hydrocarbon tetracarboxylic acid, a chain hydrocarbon tricarboxylic acid, or a chain hydrocarbon dicarboxylic acid may be a chain hydrocarbon tetracarboxylic acid or a chain hydrocarbon tricarboxylic acid, in addition to a commercial product. Or chain hydrocarbon dicarboxylic acid with C_2~6The alkanediol is produced by polycondensation under conventional conditions.</p><heading level="1">[(E₅)C_2~6Ether of alkanediol with chain hydrocarbon tetraol, chain hydrocarbon triol, or chain hydrocarbon diol]</heading><p>The above poly C_2~6a poly C to be etherified in an ether of an alkanediol with a chain hydrocarbon tetraol, a chain hydrocarbon triol, or a chain hydrocarbon diol_2~6Alkanediol, for example, "(E₁)C_2~6Polyalkylene_2~6Alkanediol. Further, the chain hydrocarbon tetraol, the chain hydrocarbon triol, and the chain hydrocarbon diol to be etherified may, for example, be described as "the compound (A)", such as pentaerythritol, glycerin, and diol.</p><p>The above poly C_2~6Commercial products of an alkanediol, a chain hydrocarbon tetraol, a chain hydrocarbon triol, or an ether of a chain hydrocarbon diol, for example, UNILUBE (trademark) 5TP-300KB, and Uniol (trademark) TG-3000 and TG -4000 (made by Nippon Oil Co., Ltd.).</p><p>UNILUBE (Trade Mark) 5TP-300KB is a compound in which pentaerythritol 1 mole and propylene glycol 65 mole and ethylene glycol 5 are condensed, having an IOB of 0.39, a melting point of less than 45 ° C, and then a water solubility of less than 0.05 g.</p><p>Uniol (Trade Mark) TG-3000 is a compound in which glycerol 1 molar and propylene glycol 50 moles are condensed, having an IOB of 0.42, a melting point of less than 45 ° C, a water solubility of less than 0.05 g, and a weight average molecular weight of about 3,000.</p><p>Uniol (trademark) TG-4000 is a compound in which glycerol 1 molar and propylene glycol 70 are condensed by a molar polymerization, having an IOB of 0.40, a melting point of less than 45 ° C, a water solubility of less than 0.05 g, and a weight average molecular weight of about 4,000.</p><p>The above poly C_2~6An alkane diol and an ether of a chain hydrocarbon tetraol, a chain hydrocarbon triol, or a chain hydrocarbon diol, which may be further a chain hydrocarbon tetraol, a chain hydrocarbon triol, or a chain hydrocarbon diol and C_2~6The alkanediol is produced by polycondensation under conventional conditions.</p><heading level="1">[(F) chain hydrocarbon]</heading><p>The above-mentioned chain hydrocarbon has a mineral value of 0, an IOB of 0, and a water solubility of almost 0 g. Therefore, if the melting point is about 45 ° C or less, it may be contained in the above blood modifying agent. The above chain hydrocarbons may, for example, be (F₁The chain alkane, for example, a linear alkane or a branched alkane, for example, in the case of a linear alkane, if the melting point is about 45 ° C or less, the carbon number is preferably 22 or less. Further, when the vapor pressure is considered, the carbon number is preferably 13 or more. When the paraffin is branched, the melting point is low in the same carbon number as the linear alkane, and the carbon number may be 22 or more.</p><p>A commercially available product of the above hydrocarbons may, for example, be Parleam 6 (Nippon Oil Co., Ltd.).</p><p>The blood modifying agent described above in detail together with the examples is considered to have a mechanism for lowering the viscosity and surface tension of blood. Absorbent articles to be absorbed Compared with the general blood, the menstrual blood contains proteins such as the endometrial wall, and they act in such a way that the blood cells are connected to each other, and the blood cells tend to be in a continuous arrangement state. Therefore, the menstrual blood to be absorbed by the absorbent article tends to become highly viscous. When the top sheet and the second sheet are non-woven or woven, the menstrual blood is easily clogged between the fibers, and the user feels sticky feeling, and then at the top. The surface of the sheet spreads through the blood and becomes leaky.</p><p>In the absorbent article of the present invention, since the top sheet contains a blood modifying agent which is considered to have a function of lowering the viscosity and surface tension of the blood, the fibers of the top sheet are not easily blocked by the menstrual blood, and the menstrual blood can be transmitted from the top sheet to the second sheet. , quickly move to the absorber.</p><p>Further, in the absorbent article of the present invention, it is considered that when the melting point of the blood modifying agent is about 45 ° C or lower, whether it is a liquid or a solid at normal temperature (25 ° C), and when it comes into contact with a body fluid of about 30 to about 40 ° C, Liquefaction (or liquid), easy to dissolve in body fluids.</p><p>Further, it is considered that the blood modifying agent having an IOB of about 0 to about 0.60 has high organicity and easily enters between blood cells, and the blood cells can be stabilized, and the blood cells are less likely to form a continuous alignment structure.</p><p>It is considered that the above-mentioned modifier is such that the blood cells are stabilized and the blood cells are not easily formed into a continuous array structure, and the absorber easily absorbs menstrual blood. For example, it is known that an acrylic high-absorbent polymer, that is, an absorbent article containing SAP, absorbs menstrual blood, and the continuously arranged blood cells coat the surface of the SAP, and it becomes difficult for SAP to exert absorption performance, but by setting the blood cell to be stable, SAP It becomes easy to exert absorption performance. Further, it is considered that the red blood cell membrane is not easily destroyed by the blood modifying agent having a high affinity with red blood cells to protect the red blood cell membrane.</p><p>The blood modifying agent contained in the top sheet may be the same as or different from the blood modifying agent contained in the second sheet. For example, the blood modifying agent for the top sheet is selected from the viewpoints of feeling, skin protection, whiteness after menstrual absorption, and the like, and then the blood modifying agent for the second sheet may be a back-infiltration rate, a residual blood amount, and absorption. Choose from the viewpoint of body movement speed and the like.</p><p>In the absorbent article according to the first aspect of the present invention, the top sheet and the second sheet contain a blood modifying agent, and the absorbent article according to another embodiment of the present invention, the top sheet and/or the second sheet contains only the blood modifying agent. Next, in the absorbent article according to another embodiment of the present invention, the top sheet and/or the second sheet contains a blood modifying agent-containing composition containing a blood modifying agent and at least one other component.</p><p>Hereinafter, the composition containing the blood modifying agent will be described.</p><heading level="1">[The blood modifying agent contains a composition]</heading><p>The blood modifying agent-containing composition is a blood-containing modifying agent and at least one other component.</p><p>The other components of the above-mentioned at least one kind are not particularly limited as long as they do not inhibit the effects of the present invention, and examples thereof include those in the industry, and those which are particularly used in the top sheet.</p><p>The other components of at least one of the above may be, for example, an anthrone oil, an anthrone or an anthrone-based resin.</p><p>The other components of at least one of the above may, for example, be an antioxidant such as BHT (2,6-di-t-butyl-p-cresol), BHA (butylated hydroxyanisole), or gallic acid C. Base ester and the like.</p><p>The other components of at least one of the above may be, for example, a vitamin, for example, a natural vitamin or a synthetic vitamin. The above vitamins may, for example, be a water-soluble vitamin such as a vitamin B group such as vitamin B.₁, vitamin B₂, vitamin B₃, vitamin B₅, vitamin B₆, vitamin B₇, vitamin B₉, vitamin B₁₂Wait, vitamin C.</p><p>The vitamin may, for example, be a fat-soluble vitamin, for example, a vitamin A group, a vitamin D group, a vitamin E group, or a vitamin K group.</p><p>These vitamins also contain their derivatives.</p><p>Examples of the other components of the above-mentioned at least one kind include an amino acid, for example, alanine, arginine, lysine, histidine, proline, hydroxyproline, and the like.</p><p>The other components of at least one of the above may, for example, be zeolites, for example, natural zeolites such as analcime, chabazite, stilbite, sodium zeolite, zeolite, and samarium manganese ore, and synthetic zeolites.</p><p>Examples of the other components of the above-mentioned at least one kind include cholesterol, hyaluronic acid, lecithin, and ceramide.</p><p>Further, examples of the at least one other component include a drug, for example, a skin astringent, an anti-acne agent, an anti-wrinkle agent, an anti-cellulite agent, a whitening agent, an antibacterial agent, an antifungal agent, and the like.</p><p>The skin astringent agent may, for example, be zinc oxide, aluminum sulfate or tannic acid, or an oil-soluble skin astringent agent such as an oil-soluble polyphenol. Examples of the above oil-soluble polyphenols include natural oil-soluble polyphenols, for example, astragalus extract, small forsythia extract, stalk extract, chamomile extract, burdock extract, sage extract, and extract of East China wolfberry. , Western Bodhi Extract, Birch extract, Physalis extract, sage extract, sage extract, hand-pepper extract, hibiscus extract, eucalyptus extract, linden extract, hop extract, maraini extract , barley extract, etc.</p><p>Examples of the anti-acne agent include salicylic acid, benzammonium peroxide, resorcinol, sulfur, erythromycin, zinc, and the like.</p><p>Examples of the anti-wrinkle agent include lactic acid, salicylic acid, salicylic acid derivatives, glycolic acid, phytic acid, lipoic acid, and lysophosphatidic acid.</p><p>The anti-cellulite agent may, for example, be a xanthine compound, for example, an aminoporphyrin, caffeine, theophylline, theobromine or the like.</p><p>The above whitening agents may, for example, be nicotinic acid amide, citric acid, arbutin, glucosamine and derivatives, phytosterol derivatives, ascorbic acid and derivatives thereof, and mulberry extract and placenta extract.</p><p>Further, examples of the at least one other component include an anti-inflammatory component, a pH adjuster, an antibacterial agent, a moisturizer, a fragrance, a coloring matter, a dye, a pigment, and a plant extract extract. The anti-inflammatory component may, for example, be a natural anti-inflammatory agent such as peony, turmeric, small forsythia, chamomile, licorice, peach leaf, wormwood, perilla extract, etc., and synthesize an anti-inflammatory agent such as allantoin, dipotassium glycyrrhizinate Wait.</p><p>The pH adjusting agent may, for example, be one in which the skin is weakly acidic, such as malic acid, succinic acid, citric acid, tartaric acid, or lactic acid.</p><p>The above pigment may, for example, be titanium oxide.</p><p>The blood modifying agent comprises a composition comprising a blood modifying agent and at least one other component, preferably from about 50 to about 99% by mass and about 1~ About 50% by mass, more preferably from about 60 to about 99% by mass and from about 1 to about 40% by mass, still more preferably from about 70 to about 99% by mass and from about 1 to about 30% by mass, and still more preferably about 80% by mass ~ about 99% by mass and about 1 to about 20% by mass, more preferably about 90 to 99% by mass and about 1 to about 10% by mass, and further preferably about 95 to 99% by mass and about 1 to about 5 quality%. It is considered from the viewpoint of the effects of the present invention.</p><p>The above blood modifying agent contains a composition containing a surfactant preferably less than the amount of the hydrophilization treatment from the top sheet or the second sheet. More specifically, the blood modifying agent contains a composition, and the surfactant is preferably from about 0.0 to about 1.0 g/m.²More preferably, it is about 0.0 to about 0.8 g/m.²More preferably, it is from about 0.1 to about 0.5 g/m.²And then more preferably from about 0.1 to about 0.3 g/m²The range of the amount of the flat.</p><p>When the amount of the surfactant increases, there is a tendency that the menstrual blood easily remains on the top sheet.</p><p>Further, as the surfactant, for example, those skilled in the art can be used, for example, an anionic surfactant, a cationic surfactant, a nonionic surfactant, an amphoteric surfactant, or the like.</p><p>The blood modifying agent contains a composition, and preferably contains water of from about 0.0 to about 1.0 g/m.²More preferably, it is about 0.0 to about 0.8 g/m.²More preferably, it is from about 0.1 to about 0.5 g/m.²And then more preferably from about 0.1 to about 0.3 g/m²The range of the amount of the flat.</p><p>Water is less preferred because it lowers the absorption performance of the absorbent article.</p><p>The blood modifying agent contains a composition, and when the component containing at least one of the other components and the blood modifying agent is contained, the other The component preferably has a weight average molecular weight of about 2,000 or less, and then has a weight average molecular weight of 1,000 or less. When the weight average molecular weight becomes high, it becomes difficult to reduce the viscosity of the blood modifying agent composition to a viscosity suitable for coating, and it is necessary to dilute with a solvent. Further, when the weight average molecular weight is increased, the composition of the blood modifying agent is sticky, which may cause unpleasantness to the user.</p><p>The above-mentioned liquid-permeable top sheet can be used without any particular limitation in the technical field, for example, a sheet-like material having a liquid-permeable structure, such as an apertured film, a woven fabric, a non-woven fabric, or the like. Examples of the fibers constituting the woven fabric and the nonwoven fabric include natural fibers and chemical fibers, and natural fibers include, for example, pulverized cellulose such as pulp and cotton, and chemical fibers, and examples thereof include rayon and fibrillated rayon. Semi-synthetic cellulose such as regenerated cellulose, acetate, triacetate, thermoplastic hydrophobic chemical fiber, and thermoplastic thermoplastic chemical fiber to which hydrophilization treatment is applied.</p><p>The thermoplastic hydrophobic chemical fiber may, for example, be a single fiber of polyethylene (PE), polypropylene (PP) or polyethylene terephthalate (PET), or a graft polymer of PE and PP. fiber.</p><p>Examples of the nonwoven fabric include, for example, a breathable nonwoven fabric, a spunbonded nonwoven fabric, a point-bonded nonwoven fabric, a water-flow woven nonwoven fabric, a needle-punched nonwoven fabric, a melt-blown nonwoven fabric, and the like (for example, SMS or the like).</p><p>The liquid-impermeable back sheet may, for example, be a film containing PE, PP or the like, a resin film having air permeability, a resin film having a gas permeable property such as a spun bond or a water flow entanglement, or a laminate layer of SMS or the like. Not woven Cloth and so on. Considering the softness of the absorbent article, for example, the amount of the flat is about 15 to about 30 g/m.²A low density polyethylene (LDPE) film is preferred.</p><p>The second sheet may be, for example, the same as the liquid-permeable top sheet.</p><p>In the first example of the above-mentioned absorber, for example, the absorber core is covered with a core cladding.</p><p>The constituent elements of the above-mentioned absorption core may, for example, be semi-synthetic such as hydrophilic fibers, cellulose such as pulverized pulp or cotton, rayon, fibrillated rayon, or the like, regenerated cellulose, acetate, or triacetate. Cellulose, particulate polymer, fibrous polymer, thermoplastic hydrophobic chemical fiber, and hydrophilized thermoplastic chemical fiber treated with hydrophilization, and combinations thereof. Moreover, the constituent elements of the above-mentioned absorption core may, for example, be a particulate material such as a superabsorbent polymer or a sodium acrylate copolymer.</p><p>The core cladding layer is not particularly limited as long as it is liquid-permeable and has a barrier property that the polymer absorber is not permeable, such as a woven fabric or a non-woven fabric. Examples of the woven fabric and the non-woven fabric include natural fibers, chemical fibers, and woven fabrics.</p><p>The second example of the above-mentioned absorber may be, for example, an absorbent sheet or a polymer sheet, and preferably has a thickness of from about 0.3 to about 5.0 mm. The absorbent sheet and the polymer sheet are generally used without any particular limitation as long as the user of the absorbent article such as a sanitary napkin.</p><p>Further, the blood modifying agent may be present in any position such as the entire top sheet and the central portion near the vaginal opening in the planar direction of the top sheet.</p><p>Further, when the liquid permeable top sheet is formed of a non-woven fabric or a woven fabric, the blood modifying agent is preferably an interfiber space which does not block the nonwoven fabric or the woven fabric, and the blood modifying agent may be, for example, a fiber surface of the non-woven fabric. The surface of the fiber is attached or coated in the form of droplets or particles. On the other hand, when the liquid permeable top sheet is formed of an apertured film, the blood modifying agent is preferably an opening which does not block the apertured film, and the blood modifying agent can be, for example, on the surface of the apertured film. Droplet or particle adhesion. When the blood modifying agent blocks the gap between the fibers of the non-woven fabric or the woven fabric or the opening of the apertured film, the liquid that hinders absorption moves to the absorbent body.</p><p>Further, in order to rapidly move to the absorbed liquid, the blood modifying agent preferably has a small particle diameter and a small amount of the blood modifying agent which is present in the form of droplets or particles.</p><p>When a material for applying a blood modifying agent is used, for example, when the top sheet is a non-woven fabric, a woven fabric or an apertured film made of a synthetic resin, it is preferred to apply a hydrophilic agent or to be hydrophilized by mixing. When the original material is hydrophilic, the lipophilic region and the hydrophilic region become sparsely coherent by application of a modifier having an organic IOC and a lipophilicity of about 0 to about 0.60. Therefore, it is considered that the menstrual blood composed of a hydrophilic component (plasma or the like) and a lipophilic component (such as blood cells) can exhibit a certain absorption performance.</p><p>The blood modifying agent or the blood modifying agent contains a composition as desired, and can be applied as a coating liquid containing a volatile solvent such as an alcohol solvent, an ester solvent, or an aromatic solvent. The coating liquid contains a volatile solvent, and the viscosity of the coating liquid containing the composition of the blood modifying agent or the blood modifying agent is lowered, so that the coating becomes easy, and it is not necessary to add it when coating is desired. The tempering of the coating step is simplified.</p><p>The method for applying the blood modifying agent or the blood modifying agent containing the composition or the coating liquid containing the same is not particularly limited, and the blood modifying agent or the blood modifying agent is required to contain the composition or the like. The coating liquid is heated, for example, using a non-contact type applicator, for example, a spiral applicator, a curtain coater, a spray applicator, a dip coater, etc., a contact applicator or the like The blood modifying agent or the blood modifying agent may be coated with a composition or a coating liquid containing the same. In the above coating apparatus, a non-contact type applicator is preferred from the viewpoint that the entire droplet-forming or particulate-shaped modifier is uniformly dispersed, and that the material is not damaged.</p><p>Further, the blood modifying agent or the blood modifying agent contains a composition or a coating liquid containing the same, and when it is a liquid at room temperature, it may be heated directly or decreased in viscosity, and then solid at room temperature. Heating is used to liquefy and can be applied by a controlled seam HMA (Hot Melt Adhesive) gun. By controlling the increase in the gas pressure of the joint HMA gun, a particulate-shaped blood modifying agent or a blood modifying agent-containing composition can be applied.</p><p>Further, the blood modifying agent or the blood modifying agent contains the coating amount of the composition, and can be adjusted, for example, by adjusting the amount of coating by the control joint HMA gun.</p><p>The blood modifying agent may be applied during the production of the top sheet and/or the material of the second sheet, for example, when it is not woven, or may be applied to a production line for producing an absorbent article. From the viewpoint of suppressing equipment investment, it is preferable to apply a blood modifying agent on the production line of the absorbent article, to prevent the blood modifying agent from falling off, and to contaminate the production line, in the downstream step of the production line, specifically before sealing the product into individual packaging. Preferably, the blood modifying agent is coated.</p><p>Where the blood modifying agent is applied immediately before sealing the product into individual packages, for example, a top sheet of an absorbent article precursor having a liquid permeable top sheet, a second sheet, an absorbent body, and a liquid impervious back sheet The blood modifying agent can be applied once on the top sheet and the third region of the second sheet by blowing the blood modifying agent from the control seam HMA gun.</p><p>The above blood modifying agent may also function as a lubricant. When the top sheet is a non-woven fabric or a woven fabric, the friction between the fibers can be reduced, and the feeling of the non-woven fabric or the woven fabric can be improved. Further, when the top sheet is a resin film, the friction between the top sheet and the skin can be lowered.</p><p>The above blood modifying agent is preferably a weight average molecular weight of about 2,000 or less, and more preferably a weight average molecular weight of 1,000 or less. When the weight average molecular weight becomes high, it becomes difficult to reduce the viscosity of the blood modifying agent to a viscosity suitable for coating, which may occur in a case where it is diluted with a solvent. Further, when the weight average molecular weight is increased, the blood modifying agent is sticky, which may cause unpleasantness to the user.</p><p>In the present specification, the "weight average molecular weight" includes a compound derived from a polydisperse system (for example, a compound produced by sequential polymerization, a plurality of fatty acids, an ester formed with a plurality of aliphatic monovalent alcohols), and a single compound (for example). The concept of an ester produced by one fatty acid and one aliphatic monovalent alcohol refers to N_iMolecular weight M_iIn the system composed of molecules (i=1, or i=1, 2...), the following formula: M_w=ΣN_iM_i²/ΣN_iM_iObtained M_w。 </p><p>In the present specification, the weight average molecular weight means a value in terms of polystyrene obtained by colloidal permeation chromatography (GPC).</p><p>The measurement conditions of GPC are, for example, the following.</p><p>Model: High-speed liquid chromatogram by Hitachi High-Technologies Lachrom Elite</p><p>Pipe column: SHODEX KF-801, KF-803 made by Showa Denko Electric Co., Ltd. And KF-804</p><p>Dissolution: THF</p><p>Flow rate: 1.0mL/min</p><p>Injection volume: 100μL</p><p>Detection: RI (differential refractometer)</p><p>Moreover, the weight average molecular weight described in the examples of the present specification is measured under the above conditions.</p><p>The absorbent article is suitable for an absorbent article for absorbing blood, such as a sanitary napkin, a pad, or the like.</p><p>Further, the absorbent article of the present invention is different from the absorbent article containing the conventional care product composition, the emulsion composition, and the like, and does not require a component such as a buffering agent or an immobilizing agent, and may be a blood modifying agent monomer. Used on the top sheet.</p>

[Examples]

Hereinafter, the present invention will be described by way of examples, but the invention is not limited thereto.

[example 1]

[Evaluation of the rate of rewet and the moving speed of the absorber]

Preparation of a hydrophilic fabric-treated breathable non-woven fabric (polyester and polyethylene terephthalate composite fiber, flat: 35g / m²) formed top sheet (referred to as "TS"), breathable non-woven fabric (composite fiber made of polyester and polyethylene terephthalate, flat weight: 30g/m²) The second sheet ("SS") and pulp (bed: 150~450g/m)², the more the central part, the acrylic high absorption polymer (floor: 15g / m²And an absorbent body comprising a fabric as a core cladding, a water-repellent-treated side sheet, and a back sheet formed of a polyethylene film.

The top sheet is manufactured according to the method described in Japanese Patent Laid-Open No. 2008-2034, and has an acre structure, and the thickness of the acre portion is about 1.5 mm, the thickness of the groove portion is about 0.4 mm, and the spacing of the mud structure is followed by the acre portion. The width + the width of the groove portion is about 4 mm, and the opening portion having an opening ratio of about 15% is formed in the groove portion.

As a blood modifying agent, choose Panaseate 810s (made by Ribe Oil Co., Ltd., glycerin and fatty acid triester), and at room temperature, the skin contact surface (mugou surface) of the top sheet by the control joint HMA gun is 5.0g. /m²The amount of the coating is applied. It was confirmed by an electron microscope that Panaseate 810s adhered to the surface of the fiber in the form of fine particles. Next, similarly, at the skin contact side of the second sheet, 1.2 g/m²The amount of flat is coated with Panasate 810s.

Next, the sanitary napkin No. 1-1 was formed by superimposing the back sheet, the absorbent body, the second sheet, and the top sheet having the mucus surface as the top.

Coinciding the top sheet on the second sheet with the acre surface as the upper sheet The needle was fixed so that the Panaseate 810s was controlled from the HMA gun at a pressure of 0.5 MPa at the skin contact surface (mud surface) of the top sheet at 5.0 g/m.²The amount of coating is applied. Next, the sanitary napkin No. 1-2 was formed by sequentially laminating the back sheet, the absorbent body, and the laminate of the second sheet and the top sheet having the top surface of the mucus.

Moreover, the staple of the sanitary napkin No. 1-2 was removed, and the surface of the second sheet which was in contact with the top sheet was confirmed, and it was confirmed that the Panaseate 810s was applied centering on the area adjacent to the groove of the top sheet.

The second sheet was formed into a sanitary napkin No. 1-3 in the same manner as the absorbent article No. 1-1 except that the Panaseate 810s was not applied.

The top sheet and the second sheet were formed into a sanitary napkin No. 1-4 in the same manner as the absorbent article No. 1-1 except that the Panasate 810s was not coated.

[experiment method]

On the top sheet containing each blood modifying agent, an open acrylic plate (200 mm × 100 mm, 125 g, with a hole of 40 mm × 10 mm in the center) was placed, and the horse was EDTA blood (37 ± 1 ° C) from the above hole. In the blood, in order to prevent coagulation, 3.0 g of ethylenediaminetetraacetic acid (hereinafter referred to as "EDTA") was added, and the sample was dropped using a pipette (first time), and after 1 minute, the horse was 37 ± 1 °C. 3.0 g of EDTA blood was dropped from the acupuncture point of the acrylic plate and the pipette was again dropped (the second time).

Immediately after the dropping of the second blood, the acrylic plate was removed, and the filter paper was placed at the place where the blood was dropped (ADVANTEC Toyo Co., Ltd.) Divisional filter paper No. 2, 50mm × 35mm) 10 pieces (the total mass of 10 pieces of filter paper: FW₀(g)), from which the pressure is made 30g/cm²Place heavy objects in the same way. After 1 minute, the filter paper was taken out, and the total mass FW of 10 pieces of filter paper after the test was measured.₁(g), the "return-in rate" is calculated by the following formula.

Infiltration rate (% by mass) = 100 × [FW₁(g)-FW₀(g)]/6.0(g)

Further, in addition to the evaluation of the rewet rate, after the second blood drop was passed for one minute, the acrylic plate was removed, and the mass of the top sheet and the second sheet was measured, and the difference between the quality of the top sheet and the quality of the second sheet was measured. The amount of blood remaining.

Further, in addition to the evaluation of the rewet rate, the time during which the blood of the second time is dropped and the time when the blood moves from the top sheet to the absorber is measured, that is, the "absorbent moving speed". The moving speed of the absorbent body refers to the time from when the absorbent body is put into the blood until the red color of the blood is not visible on the surface of the top sheet and inside.

The results of the rewet rate, the moving speed of the absorbent body, and the amount of residual blood of the sanitary napkins No. 1-1 to 1-4 are shown in Table 2 below.

<tables><img id="" he="618" wi="2006" file="twi577359b_d0012.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></tables>

According to Table 2, the second sheet containing the blood modifying agent-containing absorbent articles No. 1-1 and 1-2 has a low rewet ratio and a small amount of residual blood is less than the absorbent articles No. 1-3 and 1-4. Therefore, the second sheet is an absorbent article containing a blood modifying agent No.1-1 and 1-2, because the menstrual blood can be quickly moved from the top sheet to the absorbent body, meaning that the high-viscosity menstrual blood does not easily remain in the top sheet, and the top sheet can be free from stickiness and dryness. Further, it is suggested that the second sheet is an absorbent article No. 1-1 and 1-2 containing a blood modifying agent, and it is difficult to leave a high-viscosity menstrual blood clot on the top sheet, and it is difficult for the user to feel visually unpleasant.

Further, since the absorbent article No. 1-2 has the same result as or equal to that of the absorbent article No. 1-1, it is considered that the coating ratio and the top sheet are in the region adjacent to the groove portion of the top sheet in the second sheet. A large amount of blood modifying agent in the area adjacent to the acre, can effectively transform the blood.

[Example 2]

[Data of other blood modifying agents]

Prepare commercially available sanitary napkins. The sanitary tampon is a woven fabric made of a hydrophilic agent treated with a hydrophilic agent (polyester and polyethylene terephthalate), and the amount of the composite fiber is 35 g/m.²) The top sheet and ventilated non-woven fabric (composite fiber made of polyester and polyethylene terephthalate, flat weight: 30g/m)²) The second sheet and pulp formed (Plat amount: 150~450g/m)², the more the central part, the acrylic high-absorbent polymer (floor: 15g / m²And an absorbent body of the core cladding, a water-repellent-treated side sheet, and a back sheet formed of a polyethylene film.

The blood modifying agents used in the experiments are listed below.

[(A₁) an ester of a chain hydrocarbon tetraol with a fatty acid]

. UNISTAR H-408BRS, manufactured by Nippon Oil Co., Ltd.

Tetrakilyl tetraethyl 4-ethylhexane

. UNISTAR H-2408BRS-22, manufactured by Nippon Oil Co., Ltd.

Mixture of pentaerythritol tetrakis(2-ethyl)hexane acid and neopentyl glycol di-2-ethylhexaneate (58:42, weight ratio)

[(A₂) an ester of a chain hydrocarbon triol with a fatty acid]

. Cetiol SB45DEO, made by Koguni Japan Stock Co., Ltd.

Fatty acid is glycerol and fatty acid triester of oleic acid or stearic acid

. Three C2L oil fatty acid glycerides, manufactured by Nippon Oil Co., Ltd.

C₈Fatty acid: C₁₀Fatty acid: C₁₂The fatty acid contains a weight ratio of glycerol to fatty acid triglyceride of about 37:7:56

. Tri-CL oil fatty acid glyceride, manufactured by Nippon Oil Co., Ltd.

C₈Fatty acid: C₁₂Fatty acid containing about the weight ratio of glycerol to fatty acid triester

. Panasate 810s, manufactured by Nippon Oil Corporation

C₈Fatty acid: C₁₀Fatty acids contain about 85:15 by weight of glycerol and fatty acid triesters.

. Panasate800, manufactured by Nippon Oil Corporation

Fatty acid is all octanoic acid (C₈Glycerol and fatty acid triester

. Panasate800B, manufactured by Nippon Oil Corporation

The fatty acids are all 2-ethyl hexane acid (C₈Glycerol and fatty acid triester

. NA36, manufactured by Nippon Oil Co., Ltd.

C₁₆Fatty acid: C₁₈Fatty acid: C₂₀Fatty acid (containing both saturated and unsaturated fatty acids) containing a weight ratio of glycerol to fatty acid triglyceride of about 5:92:3

. Three coconut oil fatty acid glyceride, manufactured by Nippon Oil Co., Ltd.

C₈Fatty acid: C₁₀Fatty acid: C₁₂Fatty acid: C₁₄Fatty acid: C₁₆Fatty acid (containing both saturated and unsaturated fatty acids) containing a weight ratio of glycerol to fatty acid triglyceride of about 4:8:60:25:3

. SOY42, made by Nippon Oil Co., Ltd.

C₁₄Fatty acid: C₁₆Fatty acid: C₁₈Fatty acid: C₂₀Fatty acid (containing both saturated and unsaturated fatty acids) containing a weight ratio of glycerol to fatty acid of about 0.2:11:88:0.8

. Dioctyl octanoate, manufactured by Nippon Oil Co., Ltd.

Fatty acid is a diester of glycerol and fatty acid of octanoic acid

[(A₃) an ester of a chain hydrocarbon diol and a fatty acid]

. Kemubolu BL, made by Nippon Oil Co., Ltd.

Dodecanediol dodecanoic acid (C₁₂Monoester

. Kemubolu BS, manufactured by Nippon Oil Co., Ltd.

Pentadecane acid of butanediol (C₁₈Monoester

. UNISTAR H-208BRS, manufactured by Nippon Oil Co., Ltd.

Diethyl 2-ethylhexane acid neopentyl glycol

[(C₃a chain hydrocarbon dicarboxylic acid having two carboxyl groups, a hydroxy acid, an alkoxy group An ester of an acid or a pendant acid with an aliphatic monovalent alcohol]

. Dioctyl adipate, manufactured by Wako Pure Chemical Industries

[(D₃) esters of fatty acids with aliphatic monovalent alcohols]

. Aileru WE20, made by Nippon Oil Co., Ltd.

Dodecanoic acid (C₁₂) with dodecyl alcohol (C₁₂Ester

. Aileru WE40, made by Nippon Oil Co., Ltd.

Myristic acid (C₁₄) with dodecyl alcohol (C₁₂Ester

[(E₁)C_2~6Alkanediol

. UniolD-1000 (Uniol is all made by Nippon Oil Co., Ltd.)

Polypropylene glycol having a weight average molecular weight of about 1,000

. UniolD-1200

Polypropylene glycol having a weight average molecular weight of about 1,200

. UniolD-3000

Polypropylene glycol having a weight average molecular weight of about 3,000

. UniolD-4000

Polypropylene glycol having a weight average molecular weight of about 4,000

. UniolPB500

Polytetramethylene glycol having a weight average molecular weight of about 500

. UniolPB700

Polyoxybutylene polyoxypropylene glycol having a weight average molecular weight of about 700

. UniolPB1000R

Polytetramethylene glycol having a weight average molecular weight of about 1000

[(E₂)C_2~6Ester of alkanediol and fatty acid]

. WILBRIDEcp9, manufactured by Nippon Oil Co., Ltd.

The OH group at both ends is cetyl acid (C₁₆Esterified polytetramethylene glycol having a weight average molecular weight of about 1,100

[(E₃)C_2~6Alkanediol and fatty acid ether]

. UNILUBEMS-70K, manufactured by Nippon Oil Co., Ltd.

Stearic acid decyl ether of polypropylene glycol, about 15 repeating units

[(F₁) chain alkane]

. Parleam6, manufactured by Nippon Oil Co., Ltd.

Copolymerization of flowing iso-liquid paraffin, isobutylene and n-butene, followed by branching hydrocarbons formed by addition of hydrogen, degree of polymerization: from about 5 to about 10

[other]

. NA50, manufactured by Nippon Oil Co., Ltd.

Addition of hydrogen to NA36 to reduce the ratio of double bonds from unsaturated fatty acids of raw materials to triglycerides of fatty acids

. (octanoic acid/capric acid) monoglyceride, manufactured by Nippon Oil Co., Ltd.

Octanoic acid (C₈And decanoic acid (C₁₀a monoester containing glycerol and fatty acid in a weight ratio of about 85:15

. Monomuls 90-L2 lauric acid monoglyceride, manufactured by Coguni Japan Co., Ltd.

. unioxHC60, manufactured by Nippon Oil Co., Ltd.

Polyoxyethylene hardened castor oil

. WILBRIDEs 753, manufactured by Nippon Oil Co., Ltd.

Polyoxyethylene polyoxypropylene polyoxybutylene glycerol

. Isopropyl citrate, manufactured by Tokyo Chemical Industry Co., Ltd.

. UniolD-400

Polypropylene glycol having a weight average molecular weight of about 400

. Uniol TG-330, manufactured by Nippon Oil Co., Ltd.

Glyceryl ether of polypropylene glycol, repeating unit of about 6, weight average molecular weight: about 330

. Uniol TG-1000, manufactured by Nippon Oil Co., Ltd.

Glyceryl ether of polypropylene glycol, about 16 repeating units, weight average molecular weight: about 1000

. UNILUBE DGP-700, manufactured by Nippon Oil Co., Ltd.

Diglyceryl ether of polypropylene glycol, repeating unit of about 9, weight average molecular weight: about 700

. PEG1500, made by Nippon Oil Co., Ltd.

Polyethylene glycol having a weight average molecular weight of from about 1,500 to about 1,600

. NONIONS-6, manufactured by Nippon Oil Co., Ltd.

Polyoxyethylene monostearate, about 7 repeating units, weight average molecular weight: about 600

. Vaseline, Koguni Japan Co., Ltd.

Hydrocarbon, semi-solid from petroleum

The IOB of the above samples, the melting point and water solubility are as shown in Table 3 below. Show.

Further, the water solubility was measured by the above method, and 20.0 g of 100 g of demineralized water was added, and the sample dissolved after 24 hours was evaluated as "20 g &lt;", followed by dissolution of 0.05 g in 100 g of demineralized water, but did not dissolve 1.00. The sample of g is evaluated as 0.05 to 1.00 g.

Also, regarding the melting point, "&lt;45" means that the melting point is less than 45 °C.

The skin contact surface of the top sheet of the above sanitary napkin is coated with the above blood modifying agent. Each blood modifying agent is directly applied to the blood modifying agent at room temperature, and then the blood modifying agent is heated to a melting point of +20 ° C when the room temperature is solid. Then, using a control seam HMA gun, each The blood modifying agent is micronized, and the total amount of the skin contact surface of the top sheet is about 5 g/m.²The coating is carried out in the same manner.

Fig. 6 is an electron micrograph of the skin contact surface of the top sheet in the physiological sanitary napkin (No. 2-5) in which the top sheet contains three C2L oil fatty acid glycerides. As is clear from Fig. 6, the tri-C2L oil fatty acid glyceride adhered to the surface of the fiber in the form of fine particles.

The rewet rate and the moving speed of the absorbent body were measured in accordance with the above procedure. The results are shown in Table 3 below.

Next, the whiteness of the skin contact surface of the top sheet after the absorber moving speed test was visually evaluated based on the following criteria.

: The red color of blood hardly remains, and it is impossible to distinguish between the place where blood exists and the place where it does not exist.

: Although the red color of the blood remains slightly, the place where the blood exists is not easily distinguished from the place where it does not exist.

: The red color of the blood remains somewhat, and the place where the blood exists is known.

×: Red red residue of blood

The results are shown in Table 3.

<tables><img id="" wi="2960" he="1636" file="twi577359b_d0013.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></tables>

<tables><img id="" wi="2940" he="1908" file="twi577359b_d0014.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></tables>

In the case where there is no blood modifying agent, the re-infiltration rate is 22.7%, and the moving speed of the absorbent body exceeds 60 seconds, but the rate of re-infiltration of glycerol and fatty acid is 7.0% or less, and the moving speed of the absorbent body is 8 Below the second, it is known that the absorption performance is greatly improved. However, in the glycerin and fatty acid triesters, the NA50 having a melting point exceeding 45 ° C did not significantly improve the absorption performance.

Similarly, in the blood modifying agent having a water solubility of about 0 to about 0.60 IOB, a melting point of about 45 ° C or less, and a water solubility of about 0.05 g or less of water of 25 ° C, it is understood that the absorption performance is greatly improved.

Next, the physiological sanitary napkins of No. 2-1 to 2-42 are used for a plurality of voluntary subjects, and the physiological sanitary napkin containing the blood modifying agent No. 2-1 to 2-28, even the menstrual blood. After absorption, the top sheet was found to be tack-free and the top sheet was dry. In particular, the difference between these and the sanitary napkins of No. 2-29, 32, 39, 41 and 42 was obtained as a significant answer.

Further, the sanitary napkins of No. 2-1 to No. 2-28, and in particular, the sanitary napkins containing No. 2-1 to 11, 15 to 18 and 28 blood modifying agents, after blood absorption The skin contact surface of the top sheet is not stained with blood, giving an unpleasant less answer.

Further, in the example 2, in the case where the second sheet does not contain the blood modifying agent, it is considered that the same result can be obtained as in the case of the case where the second sheet contains the blood modifying agent.

[Example 3]

Regarding the various blood of the animals, the rate of rewet was evaluated in accordance with the above sequence. The blood used in the experiment is as follows.

[Animal species]

(1 person

(2) Horse

(3) sheep

[blood type]

. Defibration: After taking blood, stirring with a glass bead in an Erlenmeyer flask for about 5 minutes

. EDTA blood: Add 12% EDTA to venous blood 65mL. 2K physiological saline solution 0.5mL

[Division]

Serum or plasma: supernatant from which defibrinated blood or EDTA blood is separately centrifuged at about 1900 G for 10 minutes at room temperature

Blood cells: serum is removed from the blood, and the residue is washed twice with phosphate buffered physiological saline solution (PBS), followed by addition of the removed serum to the phosphate buffered physiological saline solution.

Three C2L oil fatty acid glycerides become about 5g/m in the amount of ping²An absorbent article was produced in the same manner as in Example 2 except that the coating was applied, and the rewet ratio was evaluated for each of the above blood. Each blood was measured three times, and the average value was used.

The results are shown in Table 4 below.

<tables><img id="" he="1678" wi="1516" file="twi577359b_d0015.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></tables>

The same tendency as the horse EDTA blood obtained in Example 2 was also obtained in the blood of humans and sheep. Also, the same tendency was observed in defibrinated blood and EDTA blood.

[Example 4]

[Evaluation of blood retention]

The blood retention in the top sheet containing the blood modifying agent and the top sheet containing no blood modifying agent was evaluated.

[experiment method]

(1) Composite fiber made of breathable non-woven fabric (polyester and polyethylene terephthalate, flat weight: 35g/m²The skin contact surface of the formed top sheet, the tri-C2L oil fatty acid glyceride was micronized using a controlled seam HMA gun, and the basis weight was about 5 g/m.²The coating is carried out in the same manner. Further, for comparison, those who do not apply the tri-C2L oil fatty acid glyceride are also prepared. Next, both the top sheet coated with the tri-C2L oil fatty acid glyceride and the uncoated top sheet were cut to a size of 0.2 g, and the mass (a) of the sterile cell filtration cap tube + top sheet was correctly determined.

(2) About 2 mL of horse EDTA blood was added from the skin contact surface side, and allowed to stand for 1 minute.

(3) The sterile cell filtration cap tube was placed in a centrifuge tube, and subjected to low-speed centrifugation to remove excess horse EDTA blood.

(4) Determine the weight (b) of the top sheet containing the sterile cell filter cap + horse EDTA blood.

(5) The initial absorption amount (g) per 1 g of the top sheet was calculated according to the following formula.

Initial absorption = [weight (b) - weight (a)] / 0.2

(6) The sterile cell filtration cap tube was further placed in a centrifuge tube, and centrifuged at about 1200 G for 1 minute at room temperature.

(7) The weight (c) of the top sheet containing the sterile cell filter cap + horse EDTA blood was measured.

(8) The amount of absorption (g) per 1 g of the top sheet after the test was calculated according to the following formula.

Absorption after test = [weight (c) - weight (a)] / 0.2

(9) The blood retention rate (%) was calculated according to the following formula.

Blood retention rate (%) = 100 × absorption after test / initial absorption

Further, the measurement was carried out three times, and the average value thereof was used.

The results are shown in Table 5 below.

<tables><img id="" he="559" wi="1183" file="twi577359b_d0016.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></tables>

It is suggested that the top sheet containing the blood modifying agent has low blood retention and can quickly move to the absorber after absorbing blood.

[Example 5]

[Voice of blood containing blood modifying agent]

The viscosity of blood containing a blood modifying agent was measured using a Rheometric Expansion System ARES (Rheometric Scientific, Inc). Penasate 810s (2 mass%) was added to the horse's fiber, and the sample was gently stirred to form a sample. The sample was placed on a plate having a diameter of 50 mm, and the gap was 100 μm, and the viscosity was measured at 37 ± 0.5 °C. Because the plate does not apply a uniform shear rate to the sample, the average shear rate displayed by the machine is 10s.^-1。

The viscosity of the horse-defibrinated blood containing 2% by mass of Panaseate 810s is 5.9 mPa. s, on the other hand, the viscosity of the horse hair fiber without blood modifying agent is 50.4mPa. s. Therefore, it can be seen that the horse defibrinated blood containing 2% by mass of Panaseate 810s is reduced by about 90% compared with the case where the blood modifying agent is not contained. degree.

The blood is known to contain components such as blood cells and has a property of shaking, but it is considered that the blood modifying agent of the present invention lowers the viscosity of blood in a low viscosity domain. It is believed that by reducing the viscosity of the blood, the absorbed menstrual blood can be quickly moved from the top sheet to the absorber.

[Example 6]

[Micrograph of blood containing blood modifying agent]

The menstrual blood of the healthy volunteers was collected on the wrap film, and Panastate 810s dispersed in 10 times by mass of phosphate buffered physiological saline was added in such a manner that the concentration of Panaseate 810s was 1% by mass. The menstrual blood was dripped onto the slide glass, and the coverslip was covered, and the state of the red blood cells was observed with an optical microscope. A microscope photograph of menstrual blood containing no blood modifying agent is shown in Fig. 7(a), and then a microscope photograph of menstrual blood containing Panasate 810s is shown in Fig. 7(b).

As can be seen from Fig. 7, in the menstrual blood containing no blood modifying agent, a collecting block in which red blood cells are continuously arranged or the like is formed, but in the menstrual blood containing Panasate 810s, the red blood cells are stably dispersed. Therefore, it is suggested that the blood modifying agent has a function of calming red blood cells in the blood.

[Example 7]

[Surface tension of blood containing blood modifying agent]

The surface tension of the blood containing the blood modifying agent was measured by a drip drop method using a contact angle meter Drop Master 500 manufactured by Kyowa Interface Science Co., Ltd. set. The surface tension is applied to the sheep defibrinated blood, and a specific amount of the blood modifying agent is added and measured after shaking sufficiently.

The measurement was automatically performed by a machine, and the surface tension γ was obtained by the following equation (see Fig. 8 for reference).

γ=g×ρ×(de)²×1/H

g: gravity constant

1/H: correction term determined by ds/de

ρ: density

De: maximum diameter

Ds: the diameter of the position where only the de is raised by the drop end

The density ρ is measured according to the vibration density test method of "Density Test Method and Density, Mass, Capacity Conversion Table" of JIS K 2249-1995, and is measured at the temperature shown in Table 6 below.

The measurement was performed using DA-505 of Kyoto Electronics Industry Co., Ltd.

The results are shown in Table 6.

<tables><img id="" he="923" wi="1825" file="twi577359b_d0017.tif" alt="" img-content="drawing" img-format="tif" orientation="portrait" inline="no" /></tables>

As can be seen from Table 6, the blood modifying agent has 100 g of water at 25 ° C. The water solubility of 0.05 g or less can also be understood that although the solubility in water is very low, the surface tension of blood can be lowered.

It is considered that by lowering the surface tension of blood, the absorbed blood does not remain between the fibers of the top sheet, and can be quickly moved to the absorber.

The present invention is as follows.

[Figure 1]

An absorbent article comprising a liquid permeable top sheet, an absorbent body, a liquid impermeable back sheet, a top sheet and a second sheet between the absorbent members, characterized by the top sheet and the second sheet The sheet contains a blood modifying agent having an IOB of 0 to 0.60, a melting point of 45 ° C or lower, and a water solubility of 0.05 g or less to 100 g of water at 25 ° C.

[scenario 2]

2. The absorbent article according to aspect 1, wherein the top sheet has a first region and a second region having a lower liquid permeability than the first region, and the second sheet is in a thickness direction of the absorbent article. The third region and the fourth region each adjacent to the first region and the second region of the top sheet are provided, and the top sheet and the third region of the second sheet contain the blood modifying agent.

[Figure 3]

3. The absorbent article according to the aspect 2, wherein the first region is a low-pitch region having a basis weight smaller than an average amount of the top sheet, The second area is a high-pitch area having a floor amount larger than the average amount of the top sheet.

[Skin 4]

4. The absorbent article according to aspect 2 or 3, wherein the first region has a lower fiber density than the second region.

[5]

The absorbent article according to any one of the above aspects, wherein the thickness of the first region is thinner than the thickness of the second region.

[6]

The absorbent article according to any one of the above aspects, wherein the first region is a plurality of groove portions extending in a longitudinal direction of the absorbent article, and the second region is extended in a longitudinal direction of the absorbent article. The plurality of acres, and the aforementioned acre and ditch are parallel and alternately arranged.

[Skin 7]

The absorbent article according to any one of the above aspects, wherein the first region has an opening portion.

[8]

8. The absorbent article according to any one of the preceding claims, wherein the amount of the blood modifying agent in the third region is higher than the amount of the blood modifying agent in the fourth region. The amount of flat is high.

[Figure 9]

The absorbent article according to any one of the preceding aspects, wherein the blood modifying agent is at least one carbonyl bond (-CO) between (i) a hydrocarbon and (ii) a hydrocarbon CC single bond. -) and / or at least one ether linkage (-O-) compound, or (iii) a hydrocarbon CC single bond between at least one carbonyl bond (-CO-) and / or at least one ether bond (-O-), wherein at least one hydrogen atom on the hydrocarbon is substituted with a carboxyl group (-COOH) or a hydroxyl group (-OH), and in the compound of (ii) or (iii), two or more are inserted. In the case of ether bonding, the ether linkages are not adjacent to each other.

[Figure 10]

The absorbent article according to any one of aspects 1 to 9, wherein the blood modifying agent inserts at least one carbonyl bond between the CC single bond of the (i') hydrocarbon and the (ii') hydrocarbon ( -CO-), at least one ester linkage (-COO-), at least one carbonate linkage (-OCOO-) and/or at least one ether linkage (-O-) compound, or (iii ') inserting at least one carbonyl bond (-CO-), at least one ester bond (-COO-), at least one carbonate bond (-OCOO-), and/or at least one CC bond between hydrocarbons 1 ether bond (-O-) and at least 1 on hydrocarbon a compound in which a hydrogen atom is substituted with a carboxyl group (-COOH) or a hydroxyl group (-OH). Here, in the case of a compound of (ii') or (iii'), when two or more bonds are inserted, each bond does not phase. adjacent.

[Figure 11]

The absorbent article according to any one of the above aspects, wherein the blood modifying agent is (A) an ester having a compound having 2 to 4 hydroxyl groups and a compound having one carboxyl group, (B) An ester having 2 to 4 hydroxyl groups and an ether having a hydroxyl group, (C) an ester having 2 to 4 carboxyl groups and an ester having a hydroxyl group, and (D) a hydrocarbon inserted by an ether linkage ( -O-), a compound selected from the group consisting of a carbonyl bond (-CO-), an ester bond (-COO-), and a carbonate bond (-OCOO-), (E) poly C_2~6An alkanediol, or an ester or ether thereof, or (F) a chain hydrocarbon.

[Figure 12]

The absorbent article according to any one of the preceding aspects, wherein the blood modifying agent is₁) an ester of a chain hydrocarbon tetraol with a fatty acid, (A₂) an ester of a chain hydrocarbon triol with a fatty acid, (A₃) an ester of a chain hydrocarbon diol with a fatty acid, (B₁An ether of a chain hydrocarbon tetraol and an aliphatic monovalent alcohol, (B₂) an ether of a chain hydrocarbon triol and an aliphatic monovalent alcohol, (B₃) an ether of a chain hydrocarbon diol and an aliphatic monovalent alcohol, (C₁An ester of a chain hydrocarbon tetracarboxylic acid having four carboxyl groups, a hydroxy acid, an alkoxy acid or a pendant acid with an aliphatic monovalent alcohol, (C)₂An ester of a chain hydrocarbon tricarboxylic acid having three carboxyl groups, a hydroxy acid, an alkoxy acid or a pendant acid with an aliphatic monovalent alcohol, (C)₃An ester of a chain hydrocarbon dicarboxylic acid having two carboxyl groups, a hydroxy acid, an alkoxy acid or a pendant acid and an aliphatic monovalent alcohol, (D)₁An ether of an aliphatic monovalent alcohol and an aliphatic monovalent alcohol, (D₂Dialkyl ketone, (D₃An ester of a fatty acid with an aliphatic monovalent alcohol, (D₄Dialkyl carbonate, (E₁)C_2~6Alkanediol, (E₂)C_2~6Ester of alkanediol and fatty acid, (E₃)C_2~6Alkenyl diol and ether of aliphatic monovalent alcohol, (E₄)C_2~6An ester of an alkanediol with a chain hydrocarbon tetracarboxylic acid, a chain hydrocarbon tricarboxylic acid, or a chain hydrocarbon dicarboxylic acid, (E₅)C_2~6An alkane diol with a chain hydrocarbon tetraol, a chain hydrocarbon triol, or an ether of a chain hydrocarbon diol, and (F₁The group of chain alkanes is selected.

[Figure 13]

The absorbent article according to any one of the above aspects, wherein the blood modifying agent has a weight average molecular weight of 2,000 or less.

[Figure 14]

The absorbent article according to any one of the above aspects, wherein the liquid-permeable top sheet and the second sheet are non-woven fabrics or woven fabrics, and the blood modifying agent is attached to the nonwoven fabric or the woven fabric. Fiber table surface.

[Figure 15]

15. The absorbent article according to any one of the preceding aspects, wherein the absorbent article is a sanitary napkin or a pad.

[Figure 16]

The absorbent article according to any one of the above aspects, wherein the absorbent article according to any one of the above aspects, wherein the liquid permeable top sheet, the absorbent body, the liquid impervious back sheet, and the liquid permeable top sheet are The absorbent article precursor of the second sheet between the absorbent bodies is produced by spraying the blood modifying agent on the liquid-permeable top sheet side.

<p>1Physical sanitary napkins</p><p>2Top sheet</p><p>3 absorber</p><p>4Second sheet</p><p>5Side sheet</p><p>6Squeeze</p><p>7 Back sheet</p><p>8 Blood Modifier</p><p>91st area</p><p>102nd area</p><p>113rd area</p><p>124th area</p>

Fig. 1 is a front view of a sanitary napkin according to a first embodiment of the absorbent article of the present invention.

Fig. 2 is a cross-sectional view showing a section XX of a portion A of the sanitary napkin 1 shown in Fig. 1.

Fig. 3 is a cross-sectional view showing another embodiment of the absorbent article of the present invention.

Fig. 4 is a cross-sectional view showing another embodiment of the absorbent article of the present invention.

Fig. 5 is a cross-sectional view showing another embodiment of the absorbent article of the present invention.

Fig. 6 is an electron micrograph of the skin contact surface of the top sheet of the physiological sanitary napkin in which the top sheet contains three C2L oil fatty acid glycerides.

Fig. 7 is a photomicrograph of menstrual blood with or without a blood modifying agent.

Fig. 8 is a view for explaining a method of measuring surface tension.