Adhesive tape

Pressure sensitive adhesive tape

The present invention relates to pressure sensitive adhesive tape, and relates to pressure sensitive adhesive tape which has the cutting ease which can be easily cut especially by people's hand.

As an example of pressure sensitive adhesive tape which has the conventional cutting ease, pressure sensitive adhesive tape given in patent documents 1 is known. Pressure sensitive adhesive tape of a statement equips patent documents 1 with the following. A reticulated layered product which the 1st and 2nd netted film opened in the direction which carries out fiber split of the polyolefin system synthetic resin extended by one way, and intersects perpendicularly in the extension direction makes a mutual direction for Distribution abbreviated-intersect perpendicularly, and joins in piles, A synthetic resin horizontal oriented film laminated on the whole surface of the reticulated layered product, An adhesive layer laminated on the other side of the reticulated layered product. The 1st netted film consists of textiles which have the tensile strength of 1.2 kg or less per textiles mm in width, and the 2nd netted film consists of textiles which have the tensile strength of 1.4 kg or more per textiles mm in width. And the reticulated layered product and the synthetic resin horizontal oriented film are laminated so that the direction of textiles of the 1st netted film and the extension direction of the synthetic resin horizontal oriented film may abbreviated-intersect perpendicularly.

<p num="0003"><patcit num="1"><text>JP, 1-204983, A</text></patcit></p>

<p num="0004">Pressure sensitive adhesive tape of a statement is using the synthetic resin horizontal oriented film and the reticulated layered product for the above-mentioned patent documents 1 as a substrate. For this reason, cost of pressure sensitive adhesive tape cannot but become high. In the above-mentioned patent documents 1, examination sufficient about handling nature at the time of manufacture of pressure sensitive adhesive tape and use is not made. For example, there is a possibility that fault may occur that the characteristic of the reticulated layered product, etc. are unsuitable at the time of manufacture of the pressure sensitive adhesive tape, and productivity may fall, Poor attachment occurs at the time of attachment of the pressure sensitive adhesive tape, or the pressure sensitive adhesive tape tears off, 1000 pieces and the peel-off remainder of the pressure sensitive adhesive tape sometimes occur, and there is a possibility that a user's workability may fall. From a field of improvement in workability, the further improvement is called for also about cutting ease.</p><p num="0005">Then, an object of the present invention is to have good cutting ease and to provide pressure sensitive adhesive tape which can raise the productivity and a user's workability compared with the former.</p>

<p num="0006">This artificer uses a web formation object which fulfills specific conditions for a substrate (base material) of pressure sensitive adhesive tape, It found out that handling nature at the time of manufacture of pressure sensitive adhesive tape and use improves, and that the productivity of pressure sensitive adhesive tape and a user's workability specifically improved as well as having cutting ease. The present invention is made based on this knowledge, and is a thing.</p><p num="0007">That is, pressure sensitive adhesive tape by the present invention is provided with the following. A substrate consisting of a web formation object made of thermoplastics, An adhesive layer provided in one field side of the base material layer. The web formation object has the composition by which a plurality of 1st textiles extended in the 1st direction corresponding to the length direction of the pressure sensitive adhesive tape and a plurality of 2nd textiles extended in the 2nd direction corresponding to the cross direction of the pressure sensitive adhesive tape were laminated or woven, (a) Thickness of the 1st textiles is [width of 0.04 mm or less and the 1st textiles] 0.6 mm or less, (b) Thickness of the 2nd textiles is larger than thickness of the 1st textiles, and width of the 2nd textiles is more than width of the 1st textiles, (c) Tensile strength in the 1st direction of the web formation object is 130~250N/50mm, (d) Bending resistance in the 1st direction of the web formation object by the cantilever method is 40~80 mm, and bending resistance in the 2nd direction of the web formation object by the (e) cantilever method is 65~95 mm.</p>

<p num="0008">According to the present invention, it has good cutting ease and can provide pressure sensitive adhesive tape which can raise the productivity and a user's workability compared with the former.</p>

<figref num="1">It is an outline sectional view of pressure sensitive adhesive tape concerning one embodiment of the present invention.</figref><figref num="2">It is a figure showing an example of a 1 axis extension reticulated film (split web) which constitutes a substrate (web formation object) of the pressure sensitive adhesive tape.</figref><figref num="3">It is a figure showing other examples of a 1 axis extension reticulated film (slit web) which constitutes a substrate (web formation object) of the pressure sensitive adhesive tape.</figref><figref num="4">It is a figure showing an example of a substrate (web formation object) of the pressure sensitive adhesive tape.</figref><figref num="5">It is a figure showing other examples of a substrate (web formation object) of the pressure sensitive adhesive tape.</figref><figref num="6">It is a table showing the characteristic of an example.</figref><figref num="7">It is a table showing the characteristic of a comparative example.</figref>

Hereinafter, an embodiment of the present invention is described with reference to an accompanying drawing. Drawing 1 is an outline sectional view of pressure sensitive adhesive tape 1 concerning one embodiment of the present invention. As shown in Drawing 1, pressure sensitive adhesive tape 1 concerning an embodiment is provided with the following. Substrate 2 consisting of a web formation object made of thermoplastics, Adhesive layer 3 provided in one field side of substrate 2.

The web formation object which constitutes substrate 2 has the composition by which a plurality of 1st textiles extended in the 1st direction corresponding to the length direction (lengthwise direction) of pressure sensitive adhesive tape 1 and a plurality of 2nd textiles extended in the 2nd direction corresponding to the cross direction (transverse direction) of pressure sensitive adhesive tape 2 were laminated or woven.

Adhesive layer 3 is formed with a publicly known adhesive, for example, acrylic pressure sensitive adhesive. Although thickness in particular of adhesive layer 3 is not restricted, it may be about 10~40 micrometers. An extrusion lamination layer (illustration abbreviation) of substrate 2 (the web formation object) which consists of high-pressure method low density polyethylene (LDPE) at least, for example is formed in the one field for formation where adhesive layer 3 was mainly stabilized.

By a user's hand, pressure sensitive adhesive tape 1 concerning an embodiment is cut crosswise [the], and is mainly stuck on a predetermined covering part via adhesive layer 3. Of course, pressure sensitive adhesive tape 1 may be suitably used as a tape for packing also as a tape for care of health in a construction site etc., or a tape for masking.

In this embodiment, pressure sensitive adhesive tape 1 can be cut easily crosswise [the] here (cutting ease). In order to realize sticking work, that tear off and work is done [that it is stabilized and manufacture of solatium nature and pressure sensitive adhesive tape 1 can be performed (productivity), ] smoothly (workability) of pressure sensitive adhesive tape 1, etc., the web formation object which constitutes substrate 2 has the following characteristics.

That is, in the web formation object, thickness of the 1st textiles is 0.04 mm or less, and is 0.02~0.04 mm preferably. Width of the 1st textiles is 0.6 mm or less, and is 0.2~0.6 mm preferably. It is because there is a possibility of causing a fall of the cutting ease when thickness of the 1st textiles and width of the 1st textiles are too large.

Thickness of the 2nd textiles is larger than thickness of the 1st textiles. Preferably, it is 0.07 mm or less more greatly than thickness of the 1st textiles. Width of the 2nd textiles is more than width of the 1st textiles. Preferably, they are more than width of the 1st textiles, and 2 mm or less. In order to secure the cutting ease, thickness of the 2nd textiles and width of the 2nd textiles should be more than them of the 1st textiles, namely, a thing for which the web formation object has a certain amount of intensity in the 1st direction corresponding to the length direction -- if it further saysWhile the web formation object is easy to be cut in the 2nd direction corresponding to the cross direction, it is because it is more desirable to be hard to be cut compared with the 2nd direction in the 1st direction corresponding to the length direction.

Tensile strength in the 1st direction of the web formation object (namely, the length direction of pressure sensitive adhesive tape 1) is 130~250N/50mm. if tensile strength in the 1st direction of the web formation object is too low, when tearing off pressure sensitive adhesive tape 1 from a covering part, pressure sensitive adhesive tape 1 will be torn to pieces -- etc. -- there is a possibility of generating and causing a fall of workabilityIt is because there is a possibility that pressure sensitive adhesive tape 1 may go out easily, and may not fully function as a tape for packing (unpacking) by a shock at the time of a load falling, etc. when pressure sensitive adhesive tape 1 is used for packing, Conversely, it is because there is a possibility of causing a fall of the cutting ease as a result when tensile strength in the 1st direction of the web formation object is too high.

Bending resistance in the 1st direction of the web formation object by the cantilever method is 40~80 mm, and bending resistance in the 2nd direction is 65~95 mm. And bending resistance in the 2nd direction is larger than bending resistance in the 1st direction preferably. If bending resistance in the 1st direction and the 2nd direction of the web formation object is too large in being too small, If there is a possibility that workability at the time of attachment of pressure sensitive adhesive tape 1 may fall and bending resistance especially in the 2nd direction is too small, It is because there is a possibility that wrinkles, a twist, etc. may occur on the web formation object at the time of manufacture of pressure sensitive adhesive tape 1 (at for example, the time of formation of the extrusion lamination layer), and the productivity of pressure sensitive adhesive tape 1 may fall as a result. What the web formation object has a certain amount of difficulty of bending for in the 2nd direction from a field of the cutting ease, For example, it is because it thinks that it is more desirable for the web formation object not to bend easily in the 2nd direction corresponding to the cross direction as compared with the 1st direction corresponding to the length direction.

Preferably, single yarn intensity of the 1st textiles is 5Ns/piece or less, and a plurality of 1st textiles of the above and a plurality of 2nd textiles of the above have pasted up by adhesive strength beyond 40N. The 1st textiles become are easy to be cut because single yarn intensity of the 1st textiles is 5Ns/piece or less, A gap, generating which it tears off and is the peel-off remainder at the time, etc. by the 1st textiles at the time of cutting and the 2nd textiles are controlled because a plurality of 1st textiles of the above and a plurality of 2nd textiles of the above have pasted up by adhesive strength beyond 40N, and they are these, It is because the cutting ease and pressure sensitive adhesive tape 1 tear off and workability further improves.

Here, in order to paste up the 1st textiles and the 2nd textiles stably and firmly, it is preferred that the 1st textiles and the 2nd textiles have an adhesion layer which consists of linear low density polyethylene (LLDPE). For example, the 1st thermoplastic resin layer which the 1st textiles and the 2nd textiles become from polyolefin system resin, The 2nd thermoplastic resin layer that consists of linear low density polyethylene is mutually pasted up by thermo compression bonding etc. as an adhesion layer including the 2nd thermoplastic resin layer that consists of linear low density polyethylene in which the melting point is lower than the polyolefin system resin. That is, the web formation object has the composition by which lamination adhesion of a plurality of 1st textiles of the above and a plurality of 2nd textiles of the above was carried out. A difference of the melting point of the polyolefin system resin and the melting point of the linear low density polyethylene is more than 5 degreeC, and is 10~50degreeC preferably.

Polyolefin system resin means resin which makes the main ingredients polyolefin, such as polyethylene and polypropylene, and a polymer of those, and other resins and additive agents may be included within limits which do not spoil the characteristic. Similarly, linear low density polyethylene may also contain other resins and additive agents within limits which do not spoil the characteristic. As an additive agent, an antioxidant, a weathering agent, lubricant, an anti-blocking agent, a spray for preventing static electricity, an antifogger, a non-drop agent, paints, a filler, etc. are mentioned, for example.

As for linear low density polyethylene, polymerizing using a metallocene catalyst is preferred. the [in which the metallocene catalyst is a catalyst of a kind to which an active point is called what is called a comparatively single single site catalyst, and at least Distribution which has a cyclopentadienyl frame contains a child / periodic law table] -- it is a catalyst which contains IV fellows' transition metal compound at least. It is the uniform or uneven catalyst which a catalyst acquired as a typical thing by making methyl aluminoxane as an assistant catalyst, etc. react to a metallocene complex of a transition metal, for example, a bis (cyclopentadienyl) complex of zirconium or titanium, was mentioned, and combined various various kinds of complexes, assistant catalysts, carriers, etc. As the metallocene catalyst, it is JP, 58-19309, A, for example, A publicly known thing is mentioned by 59-95292, 59-23011, 60-35006, 60-35007, 60-35008, 60-35009, 61-130314, JP, 3-163088, A, etc.

Linear low density polyethylene can be obtained by making ethylene and an alpha olefin copolymerize under existence of a metallocene catalyst by manufacturing processes, such as the gaseous phase polymerizing method, the slurry polymerizing method, and a solution polymerization method. In a copolymer, it is preferred to use an alpha olefin to carbon number 4~12. concrete -- Butene and a pen ten -- it Hexane and passes and Petit , Octene , Nonen , decene, etc. are mentioned.

More specifically, it is linear low density polyethylene, It is in a state which refused oxygen, water, etc. substantially, and is aliphatic hydrocarbon, such as hexane and heptane, Aromatic hydrocarbon, such as benzene, toluene, and xylene, cyclohexane, Being able to manufacture by performing a polymerization of ethylene and an alpha olefin under existence of an inert hydrocarbon solvent chosen from alicycle fellows hydrocarbon, such as methyl cyclohexane, etc., as a polymerization temperature, the range of 0~300 degreeC to polymerization preassure power is 100kg/cm of atmospheric pressure~abbreviation.² Range to polymerization time can be chosen from the range of 1 minute~10 hours, respectively.

Linear low density polyethylene which polymerized using a metallocene catalyst has the feature that quality of molecular weight distribution is comparatively narrow unlike a copolymer obtained with a Twiggler type catalyst or the Philips type catalyst, and branching density of a molecule chain is almost equal, for example. A polymerization of linear low density polyethylene by a metallocene catalyst, For example, it is explained in full detail by JP, 2009-1776, A and JP, 8-169076, A by these people, and if it is a person skilled in the art, based on these gazettes and other conventional technologies, linear low density polyethylene can be manufactured under existence of a metallocene catalyst. Or what is marketed as linear low density polyethylene which polymerized with a metallocene catalyst can also be used.

As for linear low density polyethylene, it is still more preferred that it is the long-chain branch-type linear low density polyethylene which polymerized with a metallocene catalyst. Linear low density polyethylene which has long-chain branching for which a carbon number exceeds 20 has pliability and processability. For this reason, it is advantageous especially from a viewpoint of manufacture of the web formation object. A person skilled in the art can also compound suitably long-chain branch-type linear low density polyethylene by a publicly known method, and it can also use what is marketed as long-chain branch-type linear low density polyethylene. A method of making direct ethylene and an alpha olefin copolymerize is mentioned using a metallocene system catalyst for example as an introducing method of long-chain branching. An example which uses a complex in which at least bridge construction bis (cyclopentadienyl) Distribution has a child as a metallocene system catalyst in this case, an example which uses a complex in which at least bridge construction screw indenyl Distribution has a child, an example which uses a restricted geometry catalyst, and an example which uses a complex in which at least benzoindenyl Distribution has a child are given. A method of using a complex which has a child of bridge construction (cyclopentadienyl) (indenyl) Distribution is also preferred in generation of long-chain branching. In these methods, a kind of complex, catalyst manufacture conditions, and polymerization conditions can be chosen appropriately, and quality and quantity of long-chain branching can be controlled.

As for linear low density polyethylene, it is preferred that melt flow rates are 0.5~10g / 10min, and it is still more preferred that they are 1~5g / 10min. Since what a melt flow rate may become large in 0.5g/less than 10 min in pressure load at the time of fabrication, and exceeds 10g / 10min has low membrane formation stability, it may not be preferred. Density of linear low density polyethylene is 0.900~0.940g/cm.³Come out, and it is and preferably is 0.910~0.930g/cm.³It comes out. In separating from these ranges, there is a possibility that hot welding between the 1st textiles and the 2nd textiles may not fully be performed.

Thickness of the 2nd thermoplastic resin layer that consists of linear low density polyethylene is 4~10 micrometers, and preferably is 4~7 micrometers still more preferably 4~9 micrometers. If this thickness is less than 4 micrometers, satisfactory adhesive strength cannot be obtained in this use. On the other hand, since tensile strength falls, it will become soft and rigidity will fall too much if it exceeds 10 micrometers, there is a possibility that performance sufficient as a tape substrate may not be got.

The 2nd thermoplastic resin layer that consists of linear low density polyethylene may be laminated only on one side of the 1st thermoplastic resin layer that consists of polyolefin system resin, and may be laminated on both sides of the 1st thermoplastic resin layer. When the 2nd thermoplastics is laminated on both sides of the 1st thermoplastic resin layer, each 2nd thermoplastics may have the composition and same thickness, and may differ. However, it is preferred to fulfill conditions, the above-mentioned composition conditions, etc. of the above-mentioned thickness or the above-mentioned melt flow rate.

A plurality of 1st textiles of the above that constitute the web formation object (namely, substrate 2), Each is extended in the direction of an axis, and it is a plurality of textiles (namely, composition textiles of the 1st 1 axis extension reticulated film) which constitute the 1st 1 axis extension reticulated film extended in the 1 axis of 1st direction, or they may be a plurality of extension textiles (extension textiles group) arranged along the 1st direction. A plurality of 2nd textiles of the above that similarly constitute the web formation object (substrate 2), Each is extended in the direction of an axis, and it is a plurality of textiles (namely, composition textiles of the 2nd 1 axis extension reticulated film) which constitute the 2nd 1 axis extension reticulated film extended in the 1 axis of 2nd direction, or they may be a plurality of extension textiles (extension textiles group) arranged along the 2nd direction.

The 1 axis extension reticulated film is a film which has the web formation extended 1 axis, A rate textiles film (henceforth "a split web") which a multilayer film by which was extended 1 axis and fiber split was carried out at two or more places was able to open in the extension direction and the direction which intersects perpendicularly, and a multilayer film which has a plurality of slits contain a reticulated film (henceforth "slit web) extended 1 axis. As for the multilayer film, what has the three-layer structure where the 2nd thermoplastic resin layer (adhesion layer) that becomes both sides of the 1st thermoplastic resin layer that consists of polyolefin system resin from linear low density polyethylene was laminated is preferred.

Next, some embodiments of the web formation object are described.

[1st web formation object] The 1st web formation object is the lamination nonwoven fabric by which lamination adhesion was carried out so that the extension direction where a split web as the 1 axis extension reticulated film and a slit web as the 1 axis extension reticulated film are mutual might abbreviated-intersect perpendicularly. Drawing 2 shows the split film, Drawing 3 shows the slit web, and Drawing 3 shows the 1st web formation object.

Split web 31 extends 1 axis of multilayer films in the length direction (lengthwise direction), carries out fiber split (for example, alternately fiber split) along a lengthwise direction which is the extension direction at two or more places, and may be formed of what is extended after that in a transverse direction (cross direction) which intersects perpendicularly in the extension direction (it widens). Here, the multilayer film has the three-layer structure where the 2nd thermoplastic resin layer that becomes both sides of the 1st thermoplastics consisting of polyolefin system resin from linear low density polyethylene as mentioned above was laminated. Split web 31 is provided with the following. A plurality of mutual almost parallel trunk textiles 31a which have meshes-of-a-net-like structure and are prolonged in the extension direction as the composition textiles as shown in Drawing 2, Branch textiles 31b which connect adjoining trunk textiles 31a. A molecule which constitutes the multilayer film carries out for Distribution in the extension direction by extending the 1 axis of multilayer films. As a result, split web 31 has comparatively strong intensity in the length direction (lengthwise direction) which is the extension direction (the direction for Distribution of a component).

Slit web 32 forms a plurality of slits prolonged crosswise (transverse direction) on a multilayer film (for example, alternately formation), and may be formed by extending crosswise (transverse direction) after that. The multilayer film has the three-layer structure where the 2nd thermoplastic resin layer that becomes both sides of the 1st thermoplastics consisting of polyolefin system resin from linear low density polyethylene as mentioned above was laminated. Slit web 32 has the meshes-of-a-net-like structure of a lozenge, as shown in Drawing 3. By extending the 1 axis of multilayer films, a molecule which constitutes the multilayer film carries out for Distribution in the extension direction, and, as a result, slit web 32 has comparatively strong intensity in the cross direction (transverse direction) which is the extension direction (the direction for Distribution of a component).

As shown in Drawing 4, the 1st web formation object laminates split web 31 (Drawing 2) and slit web 32 (Drawing 3) so that the mutual extension direction may abbreviated-intersect perpendicularly, and is formed by pasting up by thermo compression bonding after that. That is, the 1st web formation object is the lamination nonwoven fabric by which lamination adhesion was carried out so that the extension direction where split web 31 (Drawing 2) and a slit web (Drawing 3) are mutual might abbreviated-intersect perpendicularly. Various kinds of characteristics, such as eyes of the 1st web formation object, composition textiles size (thickness and width), and tensile strength, Thickness of the 1st thermoplastic resin layer of the multilayer film, magnification of extension, a fiber split part in split film 31, a formation part of a slit in slit film 32, etc. are controllable by adjusting suitably. In the 1st web formation object, a trunk textiles 31a group is equivalent to a textiles group which split web 31 constitutes, and a plurality of 1st textiles of the above, and a textiles group which constitutes slit web 32 is mainly equivalent to a plurality of 2nd textiles of the above.

[2nd web formation object] The 2nd web formation object is the lamination nonwoven fabric by which lamination adhesion was carried out so that the extension direction where split web 31 (Drawing 2) and split web 31 (Drawing 2) are mutual might abbreviated-intersect perpendicularly, as shown in Drawing 5. Various kinds of characteristics, such as eyes of the 2nd web formation object, size (thickness and width) of composition textiles, and tensile strength, can control a fiber split part in thickness of the 1st thermoplastic resin layer of the multilayer film, magnification of extension, and split web 31, etc. by adjusting suitably. In the 2nd web formation object, a trunk textiles 31a group is mainly equivalent to a textiles group which constitutes one split web 31, and a plurality of 1st textiles of the above, and a trunk textiles 31a group is mainly equivalent to a textiles group which constitutes split web 31 of another side, and a plurality of 2nd textiles of the above.

[3rd web formation object] 3rd web formation object, The 1st extension textiles group that consists of a plurality of extension textiles which each was extended in the direction of an axis, and were arranged along the 1st direction, and the 2nd extension textiles group that consists of a plurality of extension textiles which each was extended in the direction of an axis, and were arranged along the 2nd direction are the lamination nonwoven fabrics by which lamination adhesion was carried out. The extension textiles may be formed by extending 1 axis of multilayer tapes of the same composition as the multilayer film in the length direction (lengthwise direction), for example. In the 3rd web formation object, a plurality of extension textiles which constitute the 1st extension textiles group are equivalent to a plurality of 1st textiles of the above, and a plurality of extension textiles which constitute the 2nd extension textiles group are equivalent to a plurality of 2nd textiles of the above.

[4th web formation object] 4th web formation object, It is arbitrary methods of weave, and is woven, and a plurality of extension textiles which constitute the 1st extension textiles group are the textiles with which the 1st extension textiles group and the 2nd extension textiles group were united by adhesion etc. after that so that a plurality of extension textiles which constitute the 2nd extension textiles group to warp may become the woof. In the 4th web formation object, a plurality of extension textiles which constitute the 2nd extension textiles group that a plurality of extension textiles which constitute the 1st extension textiles group equivalent to warp are equivalent to a plurality of 1st textiles of the above, and is equivalent to the woof are equivalent to a plurality of 2nd textiles of the above.

[5th web formation object] The 5th web formation object is the lamination nonwoven fabric by which lamination adhesion of the extension textiles group which consists of split web 31 (Drawing 2) and a plurality of extension textiles was carried out, for example. The 5th web formation object may have the two-layer composition by which lamination adhesion of split web 31 and the 2nd extension textiles group was carried out, for example, or the three-layer composition by which lamination adhesion of the 2nd extension textiles group was carried out at both sides of split web 31. In the 5th web formation object, a trunk textiles 31a group is equivalent to a textiles group which constitutes split web 31, and a plurality of 1st textiles of the above, and a plurality of extension textiles which constitute the 2nd extension textiles group are mainly equivalent to a plurality of 2nd textiles of the above.

A plurality of 1st textiles with which the web formation object was extended as mentioned above in the 1st direction corresponding to the length direction (lengthwise direction) of pressure sensitive adhesive tape 1, a plurality of 2nd textiles extended in the 2nd direction corresponding to the cross direction (transverse direction) of pressure sensitive adhesive tape 2 should just have the composition laminated or woven -- the [the] -- the [1~] -- it is not restricted to a web formation object of five.

Next, an example of a manufacturing method of pressure sensitive adhesive sheet 1 is explained briefly. First, a web formation object used as substrate 2 is prepared. Subsequently, a lamination layer which becomes both sides of the web formation object from low density polyethylene (LDPE) by extrusion lamination is formed. Subsequently, acrylic pressure sensitive adhesive is applied and adhesive layer 3 is formed in one field side of the web formation object, i. e., the lamination layer top. Thereby, pressure sensitive adhesive sheet 1 is obtained. An exfoliation sheet which exfoliates at the time of use of pressure sensitive adhesive sheet 1 is stuck on an exposure side of the acrylic pressure sensitive adhesive (adhesive layer 3) if needed, and/or a parting agent (back processing agent) is applied to the field side of another side of the web formation object, i. e., the lamination layer top.

<p num="0043">Hereinafter, an example explains the present invention concretely. However, the following examples do not limit the present invention at all.</p><p num="0044">In order to verify cutting ease, productivity, and workability of pressure sensitive adhesive tape 1, a plurality of samples of a web formation object which constitutes the substrate 2 were prepared, and each item (characteristic) shown in Drawing 6 and Drawing 7 about each sample was measured or evaluated.</p><p num="0045">[Example] Example 1-4 is the web formation object (2nd above-mentioned web formation object) by which lamination adhesion was carried out so that the extension direction where split web 31 and split web 31 are mutual respectively might abbreviated-intersect perpendicularly. In split web 31, resin B was laminated on the 1st thermoplastic resin layer that is a main stratum of the above-mentioned multilayer film with the water-cooled inflation method as the 2nd above-mentioned thermoplastic resin layer (adhesion layer) at both sides of the above-mentioned 1st thermoplastic resin layer using resin A. And split web 31 and split web 31 were pasted up by hot welding, and Example 1-4 was acquired. Example 1-4 was used as the web formation object which differs in the characteristic by changing suitably the conditions at the time of producing split web 31.</p><p num="0046">To Example 1, as the 2nd above-mentioned thermoplastic resin layer (adhesion layer) of the above-mentioned multilayer film, [comparative example] comparative example 1 is replaced with resin B, and resin C is used for it (namely, 2nd above-mentioned web formation object). Comparative example 2 is the web formation object (1st above-mentioned web formation object) by which lamination adhesion was carried out so that the extension direction where split web 31 and slit web 32 are mutual might abbreviated-intersect perpendicularly. In split web 31 and slit web 32, resin C was laminated on the 1st thermoplastic resin layer that is a main stratum of the above-mentioned multilayer film with the water-cooled inflation method as the 2nd above-mentioned thermoplastic resin layer (adhesion layer) at both sides of the above-mentioned 1st thermoplastic resin layer using resin A. And split web 31 and slit web 32 were pasted up by hot welding, and comparative example 2 was acquired. To comparative example 2, as the 2nd above-mentioned thermoplastic resin layer (adhesion layer) of the above-mentioned multilayer film, comparative example 3 is replaced with resin C, and resin B is used for it (namely, 1st above-mentioned web formation object). Comparative example 4 is the same web formation object (namely, 2nd above-mentioned web formation object) as Example 1-4, and uses Example 1-4 as the web formation object which differs in the characteristic by changing suitably the conditions at the time of producing split web 31. Comparative example 5 is a commercial web formation object, and has the same composition as the 4th above-mentioned web formation object.</p><p num="0047">Resin A~C is as follows. Resin B is linear low density polyethylene which has long-chain branching which polymerized using the meta- Seron catalyst. Resin A: High-density polyethylene HY444 (made by a Japanese polyethylene company) Resin B: Linear-low-density-polyethylene CB2001 (made by Sumitomo Chemical Co., Ltd.) Resin C: Low-density-polyethylene LE541H (made by a Japanese polyethylene company)</p><p num="0048">About each of Example 1-4 and comparative example 1-5, it is the thickness of the 1st above-mentioned textiles (warp), Width, single yarn intensity, the thickness of the 2nd above-mentioned textiles (woof), width, tensile strength of the 1st direction (lengthwise direction), The bending resistance of the 1st direction (lengthwise direction) by the adhesive strength (adhesive strength of a split web and a split web, adhesive strength of a split web and a slit web) between a plurality of 1st textiles of the above and a plurality of 2nd textiles of the above and the cantilever method and the 2nd direction (transverse direction) was measured.</p><p num="0049">The tensile strength of the 1st above-mentioned direction was measured using the tensile test machine. Specifically the specimen (200mm by 50mm) was started from each of Example 1-4 and comparative example 1-5, the started both ends of a specimen have been held, and it has held as 100 mm of between distance, it holds and ranked next with the ingredient, and measured the maximum point intensity which pulls and occurs in tensile speed 200 mm/min.</p><p num="0050">The single yarn intensity of the 1st above-mentioned textiles computed it by n by having done division of the tensile test result of the extension textiles group of n book which does division of the tensile test result of the specimen (200mm by 50mm) of a split web or a slit web with the number of composition textiles of the above-mentioned specimen, or is equivalent to the above-mentioned specimen.</p><p num="0051">The adhesive strength between a plurality of 1st textiles of the above and a plurality of 2nd textiles of the above was measured using the tensile test machine. U character type instrument which started the specimen (200mm by 150mm) from each of Example 1-4 and comparative example 1-5, and was specifically connected with the load cell of the tensile test machine from the started upper part of the specimen was hooked on the central part of the specimen. It fixed to the tensile test machine, and the lower part of the specimen was pulled by tensile speed 500 mm/min., and was made into adhesive strength by the average value of amplitude with a load directions value of ~ with a displacement of 40 mm 90 mm.</p><p num="0052">It is while evaluating the existence of generating of the fabrication nature at the time of each extrusion lamination of Example 1-4 and comparative example 1-5, wrinkles, etc., An adhesive layer is formed in each of Example 1-4 and comparative example 1-5 to make pressure sensitive adhesive tape, The cutting ease (solatium nature) of each pressure sensitive adhesive tape, productivity of each pressure sensitive adhesive tape (existence of generating of the wrinkles at the time of extrusion lamination), the existence of the textiles gap at the time of cutting (eye gap), and sticking work nature (wrinkles and existence of generating of a twist) -- it tore off and evaluated workability (existence torn to pieces, existence of the peel-off remainder) etc.</p><p num="0053">Measurement of each characteristic in Example 1-4, measurement of each characteristic [in / for an evaluation result / to Drawing 6 / comparative example 1-5], or an evaluation result is shown in Drawing 7.</p><p num="0054">As for Example 1-4, the good result was obtained by each about cutting ease, productivity, and workability. That is, cutting ease (solatium nature) is good, and wrinkles did not occur at the time of extrusion lamination, but sticking work is also easy, it tore off and neither 1000 pieces nor the peel-off remainder also sometimes occurred. On the other hand, it removed in comparative example 1 and the remainder occurred, in comparative example 2-4, cutting ease (solatium nature) was bad, and pushed out in comparative example 5, wrinkles have occurred at the time of lamination, and fabrication nature is bad. That is, a result with comparative example 1-5 good about at least one of cutting ease, productivity, and the workability was not obtained.</p><p num="0055">Cutting ease, productivity, and workability are considered that good pressure sensitive adhesive tape is obtained by using the web formation object which has the characteristic equivalent to Example 1-4 from the above thing as a substrate of pressure sensitive adhesive tape.</p>

1... pressure sensitive adhesive sheet 2... a substrate (web formation object) -- 3... adhesive layer 31... a split web (1 axis extension reticulated film) -- 32... a slit web (1 axis extension reticulated film)