Decorative sheet and member for external fitting using the same

INDUSTRIAL APPLICABILITY The present invention can provide, for example, a decorative sheet used for the exterior of a building material and a member for an exterior fitting using the same, which has excellent antiviral properties and various surface physical properties and is easy to manufacture. ..

Conventionally, a polymer composition having bactericidal properties and a method for producing the same are known (see Patent Document 1 and Patent Document 2).

<p><patcit num="1"><text>Tokukousho 63-54013 Gazette</text></patcit><patcit num="2"><text>Special Fair 4-28646 Gazette</text></patcit></p>

<p> On the other hand, it is also possible to impart bactericidal properties to wallpaper and the like by using the above-mentioned conventional polymer composition having bactericidal properties (hereinafter referred to as "bactericidal agent") and using it for wallpaper and decorative sheets. .. For example, a method of applying a disinfectant to a decorative sheet or a method of kneading it can be considered. However, in a decorative sheet, only a very thin surface of the decorative sheet is required to have bactericidal properties, but conventionally, a method of kneading into a resin or a method of kneading into a paint has been adopted, which is not always optimal. It cannot be said to be a coating film forming method. Further, when the disinfectant is kneaded into a plastic molded product or the like, problems such as an increase in the manufacturing process and cost and a decrease in productivity are likely to occur. Furthermore, when a disinfectant is kneaded into a molding resin or a paint resin, pigments, dyes, curing agents, catalysts, etc. are mixed as necessary components in the resin, and these substances react with the disinfectant. However, it may cause discoloration or have an adverse effect such as a decrease in bactericidal action, and it is necessary to individually examine the suitability with each resin.</p><p> Therefore, using the disinfectant as it is is dangerous, and it is necessary to examine the resin composition for each base material and application, which causes a problem that the work becomes complicated. In addition, when the disinfectant is kneaded into the molding resin, most of the disinfectant is kneaded into the molded product, and the required bactericidal action cannot be obtained. Is a big financial loss. The present invention has been made to solve such a problem, that is, the subject thereof is a decorative sheet which is excellent in antiviral property and also excellent in various physical properties of the surface and is easy to manufacture. To provide.</p>

<p> The decorative sheet according to one aspect of the present invention is a decorative sheet in which a colored thermoplastic resin layer, a pattern layer, a transparent thermoplastic resin layer, and a surface protective layer are provided at least in this order, and the surface protective layer is provided with the surface protective layer. , The anti-virus additive is added, the amount of the anti-virus additive added is 0.2% by mass or more and 10% by mass or less with respect to the solid content of the surface protective layer, and the average particle size of the anti-virus additive. Is 1 μm or more and 10 μm or less, and the thickness of the transparent thermoplastic resin layer is 60 μm or more and 200 μm or less. Is added.</p><p> The decorative sheet according to one aspect of the present invention is characterized in that the active ingredient of the antiviral additive is supported by an inorganic material. The decorative sheet according to one aspect of the present invention has the following formula (1), where the average particle size of the antiviral additive is "φ" and the thickness of the surface protective layer on the outermost layer is "D". It is characterized in that a relationship is established. 0.5D φ 2D . . . Equation (1)</p><p> The decorative sheet according to one aspect of the present invention is characterized in that the particle size distribution of the antiviral additive has two peaks, one is between 1 and 5 μm and the other is between 5 and 10 μm. The decorative sheet according to one aspect of the present invention is characterized in that a silicon-based component or a fluorine-based component is added to the outermost layer of the surface protective layer. The decorative sheet according to one aspect of the present invention is characterized in that a surfactant is added to the surface protective layer containing the antiviral additive. The decorative sheet according to one aspect of the present invention is characterized in that the outermost surface layer of the surface protective layer is embossed.</p><p> The exterior fitting member according to one aspect of the present invention is characterized by including a decorative sheet and a base material for exterior fittings that is adhered to the colored thermoplastic resin layer of the decorative sheet via an adhesive layer. ..</p>

<p> According to one aspect of the present invention, it is possible to provide a decorative sheet which is excellent in antiviral property, is excellent in various physical properties of the surface, and is easy to manufacture.</p>

<figref num="1">It is sectional drawing of the decorative sheet which concerns on Embodiment 1. FIG.</figref>

(Embodiment 1) Embodiment 1 of the present invention will be described below with reference to the drawings. Here, the drawings are schematic, and the relationship between the thickness and the plane dimensions, the ratio of the thickness of each layer, and the like are different from the actual ones. Further, the embodiments shown below exemplify a configuration for embodying the technical idea of the present invention, and the technical idea of the present invention describes the materials, shapes, structures, etc. of the constituent parts as follows. It is not something that is specific to something. The technical idea of the present invention may be modified in various ways within the technical scope specified by the claims stated in the claims.

(Decorative sheet 10) In FIG. 1, reference numeral 10 denotes a decorative sheet, and the decorative sheet 10 is used, for example, for the exterior of a building material. As shown in FIG. 1, the decorative sheet 10 has the following layers sequentially laminated. The following (1) to (4) will be described later. (1) Colored thermoplastic resin layer 20 (2) Pattern pattern layer 30 (3) Transparent thermoplastic resin layer 40 (4) Surface protection layer 50 In addition, each layer of the decorative sheet 10 is described above (1) to (4). The embossed portion 60 may be formed on the surface of the transparent thermoplastic resin layer 40.

(Exterior fitting member 100) As shown in FIG. 1, the decorative sheet 10 may be adhered to the exterior fitting base material 110 to produce the exterior fitting member 100. The exterior fitting member 100 has the following layers in addition to the decorative sheet 10. The following (1) and (2) will be described later. (1) Base material for exterior fittings 110 (2) Adhesive layer 120 Each layer of the member 100 for exterior fittings is not limited to (1) and (2) described above, and is not shown, but the base material 110 for exterior fittings 110. A primer layer may be formed on both sides or one side of the front and back surfaces of the above. The functions of the primer layer include, in addition to improving the adhesiveness, surface stabilization after surface treatment, anticorrosion of the metal surface, imparting adhesiveness, prevention of deterioration of the adhesive, and the like.

(Colored Thermoplastic Resin Layer 20) The colored thermoplastic resin layer 20 serves as a support for the decorative sheet 10, and specifically, a colored sheet made of an olefin material is used.

(Pattern pattern layer 30) The pattern pattern layer 30 is formed on the surface of the colored thermoplastic resin layer 20 by a printing method, and is provided for the purpose of imparting design to the decorative sheet 10. The printing method is formed by applying various printing methods such as a gravure printing method, an offset printing method, a letterpress printing method, a flexographic printing method, a screen printing method, an inkjet printing method, and an electrostatic printing method. The printing method is not limited to the above-exemplified printing methods, for example, a hand-painting method, a sumi-inking method, a transfer method, a photographic method, an electrophotographic method, a photosensitive resin method, a vacuum vapor deposition method, a chemical corrosion method, and a heat-sensitive color development method. , A conventionally known image forming means such as a discharge breaking method can be applied.

The type of pattern of the pattern pattern layer 30 is arbitrary depending on the purpose of use, the preference of the user, and the like, and for example, a wood grain pattern, a stone grain pattern, an abstract pattern, and the like are common. The type of the pattern is not limited to the types exemplified above, and may be, for example, solid printing on the entire surface. As the printing ink used in the printing method, for example, vinyl acetate-based ink (cyan, magenta, yellow) is used. Examples of printing inks include salt and vinegar inks, but the printing inks are not limited to these, and for example, colorants such as organic or inorganic dyes or pigments can be used as extender pigments, fillers, tackifiers, plasticizers, etc. It is dispersed in a binder made of synthetic resin or the like together with appropriate additives such as stabilizers, dispersants, defoaming agents, leveling agents, surfactants and desiccants, solvents or diluents, etc. be.

(Transparent Thermoplastic Resin Layer 40) The transparent thermoplastic resin layer 40 is laminated on the surface of the pattern layer 30 and is transparent, and the pattern layer 30 can be seen through from the surface of the transparent thermoplastic resin layer 40. The transparent thermoplastic resin layer 40 is a transparent thermoplastic resin, and it is preferable to add an ultraviolet absorber and a hindered amine-based light stabilizer to the transparent thermoplastic resin. The type of the transparent thermoplastic resin and the type of the ultraviolet absorber to be added are not particularly limited. Further, the thickness of the transparent thermoplastic resin layer 40 is preferably 60 μm or more and 200 μm or less, and for example, a transparent sheet having a thickness of 70 μm is used. This is because the outermost layer of the surface protective layer 50 is embossed.

(Transparent Thermoplastic Resin of Transparent Thermoplastic Resin Layer 40) The type of the transparent thermoplastic resin of the transparent thermoplastic resin layer 40 is not particularly limited, but for example, a transparent sheet made of a homopolypropylene resin is used. (Ultraviolet absorber of transparent thermoplastic resin layer 40) The type of ultraviolet absorber of transparent thermoplastic resin layer 40 is not particularly limited, but for example, a benzotriazole-based ultraviolet absorber or a triazine-based ultraviolet absorber is used. ..

(Surface Protective Layer 50) The surface protective layer 50 is provided for the purpose of imparting surface physical properties such as abrasion resistance and water resistance to the surface of the decorative sheet 10. The surface protective layer 50 is firstly a transparent thermoplastic resin, and an ultraviolet absorber and a hindered amine-based light stabilizer are added to the transparent thermoplastic resin. The type of the transparent thermoplastic resin and the type of the ultraviolet absorber are not particularly limited, and the types of the ultraviolet absorber will be described later. Secondly, the surface protective layer 50 has an antiviral additive added to the outermost layer. The type of the antiviral additive to be added is not particularly limited and will be described later.

(Layer Structure of Surface Protective Layer 50) The surface protective layer 50 is formed of a plurality of layers, for example, two layers, and is composed of an undercoat layer and a topcoat outermost layer that is overcoated on the surface of the undercoat layer. Although two layers have been exemplified as the surface protection layer 50, the surface protection layer 50 is not limited to this, and may be a single layer or three or more layers.

(Undercoat layer) As the undercoat layer, for example, a coating agent obtained by adding a curing agent to an acrylic polyol to which an ultraviolet absorber or a hindered amine-based light stabilizer is added is applied as an undercoat to a predetermined thickness, for example, 6 μm. I'm working on it. The type of the ultraviolet absorber and the type of the curing agent are not particularly limited, but as the curing agent, for example, a hexamethylene diisocyanate curing agent is used. Further, the type of the ultraviolet absorber is not particularly limited, and will be described later.

(Top coat outermost layer) As the top coat outermost layer, for example, an antivirus additive is blended in a predetermined ratio, for example, 7% by weight, in a solid content ratio to the same coating agent used for the undercoat, and this is added to a predetermined thickness, for example, 7% by weight. It is coated with 3 μm. The antiviral additive and the solid content ratio will be described later.

(Transparent thermoplastic resin of the surface protective layer 50) The type of the transparent thermoplastic resin of the surface protective layer 50 is not particularly limited, but for example, an acrylic coating agent is used. (Ultraviolet absorber of surface protective layer 50) The type of ultraviolet absorber of surface protective layer 50 is not particularly limited, but for example, a benzotriazole-based or triazine-based ultraviolet absorber is used.

(Antiviral Additive of Surface Protective Layer 50) It is preferable that the active ingredient of the antiviral additive of the surface protective layer 50 is supported by an inorganic material. Here, "glass" is used as the "inorganic material", but the "inorganic material" is not limited to glass. That is, the "active ingredient" corresponds to, for example, "silver", but is not limited thereto. This is because the active ingredient of the antiviral additive is supported by an inorganic material, so that the endurance of the viral effect can be improved. As the antiviral additive, for example, a silver-based inorganic additive (Bioside TB-B100) manufactured by Taisho Technos Co., Ltd. is used. As the antiviral additive, a silver-based inorganic additive manufactured by Taisho Technos Co., Ltd. was exemplified, but the present invention is not limited to this, and an antiviral agent (PTC-NT ANV additive (ST)) manufactured by Dainichiseika Kogyo Co., Ltd. is used. )) Or (PTC-NT ANV additive (ST)) may be used.

(Average particle size of anti-virus additive) When the average particle size of the anti-virus additive is "φ" (μm) and the thickness of the surface protective layer on the outermost layer is "D" (μm), the following It is desirable that the relationship of Eq. (1) is established. 0.5D φ 2D . . . Equation (1) When the above equation (1) holds, the antiviral effect is achieved by expanding the contact area with the antiviral additive and increasing the surface area of the antiviral additive itself. That is, the antiviral property can be improved.

(Particle size distribution of antiviral additive) The particle size distribution of the antiviral additive preferably has two peaks, one is between 1 and 5 μm and the other is between 5 and 10 μm. By having two peaks in the particle size distribution, it is possible to expand the contact area with the antiviral additive and the surface area of the antiviral additive itself, and it is possible to obtain a decorative sheet 10 having an antiviral effect. ..

(Amount of antiviral additive added) It is desirable that the amount of antiviral additive added is 0.2% by mass or more and 10% by mass or less with respect to the solid content of the surface protective layer 50. This is because the amount of the antiviral additive added is 0.2% by mass or more and 10% by mass or less with respect to the solid content of the surface protective layer, so that the decorative sheet 10 having antiviral properties can be obtained. That is, if it is less than 0.2% by mass, the effect is not exhibited, and if it exceeds 10% by mass, the effect on the mechanical strength of the film is large.

(Additives for Surface Protective Layer 50) First, it is preferable that the surface protective layer 50 has a silicon-based component or a fluorine-based component added to its outermost layer. By adding a silicon-based component or a fluorine-based component to the outermost layer, the stain resistance performance is improved and the virus does not exist on the surface for a long period of time, and as a result, the antiviral property can be improved. Secondly, the surface protective layer 50 preferably has a surfactant added to the surface protective layer 50 containing an antiviral additive. This is because the addition of the surfactant improves the compatibility between the antiviral additive and the binder of the surface protective layer 50, and the concentration varies due to the precipitation of the antiviral additive during coating. A suppressed cosmetic sheet can be obtained.

(Embossed portion 60) The embossed portion 60 is formed on the surface of the surface protective layer 50 to improve the texture of the decorative sheet 10. The pattern or pattern of the embossed portion 60 is synchronized with, for example, the pattern of the pattern pattern layer 30. Here, the thickness of the transparent thermoplastic resin layer 40 is set to 60 μm or more and 200 μm or less, and the surface protective layer 50 is embossed to produce a decorative sheet 10 having a texture and excellent weather resistance.

(Base material 110 for exterior fittings, adhesive layer 120) The base material 110 for exterior fittings serves as a support for the member 100 for exterior fittings including the decorative sheet 10. The back surface of the colored thermoplastic resin layer 20 of the decorative sheet 10 is adhered to the front surface of the base material 110 for exterior fittings via the adhesive layer 120. Thereby, it is possible to provide the exterior fitting member 100 using the decorative sheet 10 which is excellent in antiviral property and also excellent in various physical properties of the surface and is easy to manufacture.

(Manufacturing Method of Decorative Sheet 10) The manufacturing method of the decorative sheet 10 having the above-described configuration is as follows. (1) Lamination of Colored Thermoplastic Resin Layer 20 and Pattern Pattern Layer 30 As the colored thermoplastic resin layer 20, for example, wood grain printing is executed as the pattern pattern layer 30 on a colored sheet made of an olefin material. (2) Lamination of the pattern layer 30 and the transparent thermoplastic resin layer 40 After wood grain printing, a transparent thermoplastic resin layer 40, for example, a homopolypropylene resin, for example, a benzotriazole-based ultraviolet absorber or a hindered amine-based light stabilizer is applied. Add, for example, attach a transparent sheet with a thickness of 70 μm.

(3) Undercoating of surface protective layer 50 After bonding, for example, a hexamethylene diisocyanate curing agent is added to, for example, an acrylic polyol to which, for example, a benzotriazole-based ultraviolet absorber or a hindered amine-based light stabilizer is added as the surface protective layer 50. The coating agent is coated as an undercoat with a thickness of, for example, 6 μm. (4) Topcoat of surface protection layer 50 After the undercoat, as the outermost layer of the topcoat, Taisho Technos in which a similar coating agent used for the undercoat, for example, an inorganic material having an average particle size of 1 to 10 μm, for example, silver ions is supported. A silver-based inorganic additive (Bioside TB-B100) manufactured by Co., Ltd. is blended in a solid content ratio of, for example, 7% by weight, and this is applied by, for example, 3 μm to produce a decorative sheet 10.

(Manufacturing method of exterior fitting member 100) The manufacturing method of the exterior fitting member 100 having the above configuration is as follows. The back surface of the colored thermoplastic resin layer 20 of the decorative sheet 10 is adhered to the surface of the base material 110 for exterior fittings via the adhesive layer 120 to manufacture the member 100 for exterior fittings.

(Action / Effect of Embodiment 1) The action / effect of Embodiment 1 is as follows. (1) According to the first embodiment, the decorative sheet 10 is provided with the colored thermoplastic resin layer 20, the pattern layer 30, the transparent thermoplastic resin layer 40, and the surface protective layer 50 at least in this order on the surface. An anti-virus additive is added to the protective layer 50, and the amount of the anti-virus additive added is 0.2% by mass or more and 10% by mass or less with respect to the solid content of the surface protective layer 50, and the anti-virus additive is added. The average particle size is 1 μm or more and 10 μm or less, the thickness of the transparent thermoplastic resin layer 40 is 60 μm or more and 200 μm or less. By adding a stabilizer, it is possible to provide a decorative sheet 10 which is excellent in antiviral property, excellent in various physical properties of the surface, and easy to manufacture. According to the first embodiment, the amount of the silver-based antiviral agent added is 0.2% by mass or more and 10% by mass or less with respect to the solid content of the surface protective layer 50, whereby the decorative sheet 10 having antiviral properties is obtained. Obtainable. If it is less than 0.2% by mass, the effect is not exhibited, and if it exceeds 10% by mass, the effect on the mechanical strength of the film is large.

According to the first embodiment, by adding an ultraviolet absorber and a hindered amine-based light stabilizer to the transparent adhesive resin layer and the surface protective layer 50, a decorative sheet 10 having excellent weather resistance that can be used for exterior applications can be obtained. Obtainable. According to the first embodiment, when the average particle size of the antiviral additive is within the range of 1 to 10 μm, the contact area with the antiviral agent is expanded and the surface area of the antiviral additive itself is expanded, so that the antiviral is prevented. A decorative sheet 10 having an effect can be obtained. According to the first embodiment, when the thickness of the transparent thermoplastic resin is 60 μm or more and 200 μm or less, the decorative sheet 10 having excellent weather resistance can be obtained.

(2) According to the first embodiment, since the active ingredient of the antiviral is supported by an inorganic material, a decorative sheet 10 having an excellent endurance of the viral effect can be obtained. (3) According to the first embodiment, when the average particle size of the antiviral additive is "φ" and the thickness of the surface protection layer 50 of the outermost layer is "D", "0.5D φ 2D". When the relationship of the formula (1) is established, the decorative sheet 10 having an antiviral effect can be obtained by expanding the contact area with the antiviral agent and expanding the surface area of the antiviral additive itself.

(4) According to the first embodiment, the particle size distribution of the antiviral additive has two peaks between 1 to 5 μm and 5 to 10 μm, thereby expanding the contact area with the antiviral agent and antiviral. By expanding the surface area of the virus additive itself, a decorative sheet 10 having an antiviral effect can be obtained. (5) According to the first embodiment, by adding a silicon-based component or a fluorine-based component to the surface protective layer 50 of the outermost layer, the stain resistance performance is improved and the virus does not exist on the surface for a long period of time. Therefore, as a result, the antiviral property is improved.

(6) According to the first embodiment, since the surfactant is added to the surface protective layer 50 to which the anti-virus additive is added, the silver-based anti-virus additive and the surface protective layer 50 binder are contained. It is possible to obtain a decorative sheet 10 in which the compatibility with the above is good and the variation in concentration due to the precipitation of the antiviral additive during coating is suppressed. (7) According to the first embodiment, the decorative sheet 10 having a texture can be obtained by embossing (for example, the embossed portion 60). (8) According to the first embodiment, it is possible to provide the exterior fitting member 100 using the decorative sheet 10 which is excellent in antiviral property, excellent in various physical properties of the surface, and easy to manufacture.

<p> Hereinafter, Examples 1 to 4 and Comparative Examples 1 to 7 will be described. However, the present invention is not limited to the following Examples 1 to 4.</p><p>(Example 1) In Example 1, wood grain printing is performed as a pattern layer 30 on a colored sheet made of an olefin material as a colored thermoplastic resin layer 20. After wood grain printing, a transparent sheet having a thickness of 70 μm, to which a benzotriazole-based ultraviolet absorber and a hindered amine-based light stabilizer were added, was attached as a transparent thermoplastic resin layer 40 to a homopolypropylene resin. After bonding, a coating agent made by adding a hexamethylene diisocyanate curing agent to an acrylic polyol to which a benzotriazole-based ultraviolet absorber and a hindered amine-based light stabilizer have been added as a surface protective layer 50 is applied as an undercoat at 6 μm. do. After the undercoat, as the outermost layer of the topcoat, a silver-based inorganic additive (Bioside TB) manufactured by Taisho Technos Co., Ltd., in which silver ions are supported on an inorganic material with an average particle size of 1 to 10 μm in the same coating agent used for the undercoat. -B100) was blended in a solid content ratio of 7% by weight, and this was applied at 3 μm to obtain a decorative sheet 10.</p><p>(Example 2) In Example 2, a decorative sheet 10 was obtained in the same manner as in Example 1 except that a triazine-based ultraviolet absorber and a hindered amine-based light stabilizer were used for the transparent thermoplastic resin layer 40 in Example 1. rice field. (Example 3) In Example 3, a decorative sheet 10 was obtained in the same manner as in Example 1 except that a triazine-based ultraviolet absorber and a hindered amine-based light stabilizer were used for the surface protective layer 50 in Example 1. (Example 4) In Example 4, the same as in Example 1 except that a triazine-based ultraviolet absorber and a hindered amine-based light stabilizer were used for the transparent thermoplastic resin layer 40 and the surface protective layer 50 in Example 2. Obtained decorative sheet 10.</p><p>(Comparative Example 1) In Comparative Example 1, a decorative sheet 10 was obtained in the same manner as in Example 1 except that the transparent sheet thickness of the transparent thermoplastic resin layer 40 in Example 1 was set to 30 μm. (Comparative Example 2) In Comparative Example 2, a decorative sheet 10 was obtained in the same manner as in Example 1 except that an ultraviolet absorber and a light stabilizer were not added to the transparent thermoplastic resin layer 40 in Example 1.</p><p>(Comparative Example 3) In Comparative Example 3, a decorative sheet 10 was obtained in the same manner as in Example 1 except that an ultraviolet absorber and a light stabilizer were not added to the surface protective layer 50 in Example 1. (Comparative Example 4) In Comparative Example 4, Example 1 except that a silver-based inorganic additive (Bioside TB-B100) was blended in the outermost layer of the surface protective layer 50 in Example 1 at a solid content ratio of 0.1%. Obtained cosmetic sheet 10 as well.</p><p>(Comparative Example 5) In Comparative Example 5, Example 1 except that a silver-based inorganic additive (Bioside TB-B100) was blended in the outermost layer of the surface protective layer 50 in Example 1 at a solid content ratio of 14%. Obtained cosmetic sheet 10 as well. (Comparative Example 6) In Comparative Example 6, a silver-based inorganic additive in which silver ions were supported on an inorganic material having an average particle size of 0.5 μm was used in the outermost layer of the surface protective layer 50 in Example 1. , A decorative sheet 10 was obtained in the same manner as in Example 1. (Comparative Example 7) In Comparative Example 7, a silver-based inorganic additive in which silver ions were supported on an inorganic material having an average particle size of 13 μm was used in the outermost layer of the surface protective layer 50 in Example 1, except that a silver-based inorganic additive was used. A decorative sheet 10 was obtained in the same manner as in Example 1.</p><p>(Evaluation Criteria) The following performance evaluations were performed on the decorative sheets 10 of Examples 1 to 4 and Comparative Examples 1 to 7 obtained as described above. Note that (1) to (4) will be described later. (1) Weather resistance (2) Antiviral property (3) Appropriateness of steel wipes for decorative sheet 10 (4) Comprehensive judgment</p><p>(Weather resistance of decorative sheet 10) For the weather resistance of the decorative sheet 10, "weather resistance test (sunshine weather)" was used. The above "weather resistance test" conforms to the exposure test method using a JIS K7350-4 plastic laboratory light source. In the above "weather resistance test", the surface condition after 4000 hours is observed using a sunshine weather meter. The judgment result is evaluated in three stages of ", , ×" and is as follows. (1) There is an abnormality in the appearance (crack, peeling): "×" (failure) (2) Slight whitening confirmation in the appearance: "" (3) No abnormality in the appearance: "" (pass)</p><p>(Antiviral) "Antiviral" was measured as follows. The "antiviral test method" was carried out in accordance with "ISO21702". The test sample was placed in a sterile petri dish and 0.4 mL of virus solution was inoculated onto the sample. Then, it was covered with a 40 mm square polyethylene film. After covering the petri dish, the sample and virus were inoculated under the conditions of 25 ° C and humidity of 90% or more. After a predetermined time, 10 mL of SCDLP medium was poured into a petri dish to wash out the virus. The virus infectivity titer of the wash-out solution was measured by the plaque method.</p><p>(Measurement of viral infectivity titer (Plaque method)) Host cells were monolayer-cultured on a 6-well plate, and 0.1 mL of a step-diluted washout solution was inoculated into each well. The cells were cultured under the conditions of 5% CO2 and 37 ° C for 1 hour, the virus was adsorbed on the cells, and then the agar medium was poured into a 6-well plate and cultured for another 2 to 3 days. After culturing, the cells were fixed and stained, and the number of plaques formed was counted.</p><p>(Calculation of viral infectious titer) The viral infectious titer is calculated according to the following formula (2), sample 1 cm.²The per-virus infectious titer was calculated. V = (10 × C × D × N) / A . . . (Equation 2) . V: Sample 1cm²Viral load per hit (PFU / cm)²) . C: Measured number of plaques . D: Dilution ratio of wells where plaques were measured . N: SCDLP amount . A: Contact area between sample and virus (polyethylene film area)</p><p>(Calculation of antiviral activity value) The antiviral activity value was calculated according to the following formula (3). When the antiviral activity value was 2log10 or more, it was judged to have an antiviral effect. Antiviral activity value = log (Vb) -log (Vc) . . . Equation (3) . Log (Vb): Unprocessed sample 1 cm after 24 hours²Common logarithm of per-virus infectious titer . Log (Vc): Antiviral processed sample after 24 hours 1 cm²Common logarithmic value of per-virus infection titer</p><p>(Appropriate for bending the steel plate of the decorative sheet 10) The decorative sheet 10 is attached to the surface of a zinc-plated steel plate with a thickness of 0.5 mm, which is the base material of the steel plate, with a two-component urethane adhesive as an adhesive, and cured for 48 hours. As a result, it was used as a steel plate decorative material for fittings. These decorative materials for fittings were subjected to bender processing using a jig with a tip of a steel plate base material of 90 ° 0R, and the appearance of the bent top was confirmed. The judgment result is evaluated in two stages of ", ×" and is as follows. (1) No cracking or whitening of the surface protective layer on the top of the fold: "" (passed) (2) Cracking or whitening of the surface protective layer on the top of the fold: "x" (failed)</p><p>(Comprehensive evaluation) The judgment result is evaluated in two stages of ", ×" and is as follows. (1) All items are "" and antiviral property is "2.0" or higher: "" (pass) (2) Other than the above "(1)": "x" (fail)</p><p>(Evaluation results) The results are shown in Table 1.</p><p><tables num="1"><img file="JP6892031B1_D0001.tif" /></tables></p><p>(Examples 1 to 4 and Comparative Examples 1 to 7) In Examples 1 to 4, all the items were "" and the antiviral property was "2.0" or more, and "comprehensive judgment" was made. Is "" and is "passed". On the other hand, in Comparative Examples 1 to 7, the "comprehensive judgment" is "x" and "failed".</p><p>(Comparative Example 1 to Comparative Example 3) In Comparative Examples 1 to 3, the "weather resistance" is "x" and "failed". It can be inferred that Comparative Example 1 is caused by the transparent sheet thickness of the transparent thermoplastic resin layer 40 being "30 μm". It can be inferred that the cause of Comparative Example 1 is that the thickness of the transparent sheet is too thick as compared with Example 1. As a result, in relation to the thickness of the transparent thermoplastic resin layer 40, it is at least necessary that the thickness of the transparent thermoplastic resin layer 40 exceeds "30 μm" in order to obtain "weather resistance". Can be guessed.</p><p> Compared with Example 1, it can be inferred that Comparative Example 2 is caused by not adding an ultraviolet absorber and a light stabilizer to the transparent thermoplastic resin layer 40. Compared with Example 1, it can be inferred that Comparative Example 3 is caused by not adding an ultraviolet absorber and a light stabilizer to the surface protective layer 50. As a result, it can be inferred that both the transparent thermoplastic resin layer 40 and the surface protective layer 50 need to be added with an ultraviolet absorber and a light stabilizer in order to obtain "weather resistance".</p><p>(Comparative Example 4 and Comparative Example 5) In Comparative Example 4, the solid content ratio of the antiviral agent is "0.1% by mass", the antiviral property is less than "2.0", and the "comprehensive judgment" is "x". , "Fail". It can be inferred that Comparative Example 4 is caused by the solid content ratio of the antiviral agent being too low. In Comparative Example 5, the solid content ratio of the antiviral agent is "14% by mass", the steel plate bending process suitability of the decorative sheet 10 is "x", and it is "failed". It can be inferred that the cause of Comparative Example 5 is that the solid content ratio of the antiviral agent was too high. As a result, it can be inferred that the solid content ratio of the antiviral agent must be at least more than "0.1% by mass" in Comparative Example 4 and less than "14% by mass" in Comparative Example 5.</p><p>(Comparative Example 6 and Comparative Example 7) In Comparative Example 6, the average particle size of the surface protective layer 50 is "0.5 μm", the antiviral property is less than "2.0", and the "comprehensive judgment" is "x". It is "failed". It can be inferred that the cause of Comparative Example 6 is that the average particle size was too small. In Comparative Example 7, the average particle size of the surface protective layer 50 is "13 μm", the antiviral property is less than "2.0", and the "comprehensive judgment" is "x" and "failed". It can be inferred that the cause of Comparative Example 7 is that the average particle size is too large. As a result, it can be inferred that it is at least necessary that the average particle size exceeds "0.5 μm" of Comparative Example 6 and is less than "13 μm" of Comparative Example 7.</p>

10 Decorative sheet 20 Colored thermoplastic resin layer 30 Pattern pattern layer 40 Transparent thermoplastic resin layer 50 Surface protection layer 60 Embossed part 100 Exterior fitting member 110 Exterior fitting base material 120 Adhesive layer