Exterior decorative panel, transfer sheet, and method for manufacturing exterior decorative panel

Abstract

The present invention provides an exterior decorative panel having good design properties and good destructive properties, as well as a method for manufacturing the same. [Solution] The exterior decorative panel 100 has a decorative layer 10, an adhesive layer 20, and a non-combustible base material 30 in this order in the thickness direction, the thickness of the non-combustible base material being 15 mm or less, the tensile strength of the decorative layer being 1 N / mm or less, the tensile elongation at break of the decorative layer being 50% or less, and the thickness of the adhesive layer being 110 μm or less.

Description

[Technical Field]

[0001] This disclosure relates to exterior decorative panels, transfer sheets, and methods for manufacturing exterior decorative panels. [Background technology]

[0002] In apartment buildings, partitions are sometimes installed on balconies between adjacent units. These partitions normally function as privacy barriers. However, in emergencies, apartment building balconies are used as escape routes. Therefore, partitions must be able to be destroyed in emergencies (for example, kicked through).

[0003] Patent Document 1 discloses a partition panel to be installed at the boundary between adjacent houses on the balcony of an apartment building or other multi-unit dwelling, comprising a frame material constituting the partition panel, a plate material made of a destructible material fitted into the frame material, a door body disposed in an opening provided in the plate material and capable of opening and closing the opening by a rotating shaft interposed between the door body and the opening, and locks on both sides of the free end of the door body that engage detachably with the opening side of the plate material where the free end of the door body is located, wherein in an emergency, the plate material is formed to be destroyed by human force. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2011-174308 [Overview of the project] [Problems that the invention aims to solve]

[0005] One method for adding aesthetic appeal to exterior components such as partitions is to paint them. However, when painting exterior components, it is difficult to achieve delicate designs. In contrast, by transferring a decorative layer onto the exterior component using, for example, a transfer sheet, it becomes possible to achieve delicate designs. On the other hand, in the case of exterior decorative panels decorated with a decorative layer, the presence of the decorative layer may make it difficult to destroy the exterior decorative panel in an emergency.

[0006] This disclosure is made in view of the above circumstances and primarily aims to provide an exterior decorative panel having good design and good destructive properties. [Means for solving the problem]

[0007] This disclosure provides an exterior decorative panel, wherein the exterior decorative panel has a decorative layer, an adhesive layer, and a non-combustible substrate in this order in the thickness direction, the thickness of the non-combustible substrate is 15 mm or less, the tensile strength of the decorative layer is 1 N / mm or less, the tensile elongation at break of the decorative layer is 50% or less, and the thickness of the adhesive layer is 110 μm or less.

[0008] This disclosure provides a transfer sheet for use in the exterior decorative panel described above, wherein the transfer sheet has a release film and the decorative layer.

[0009] This disclosure provides a method for manufacturing exterior decorative panels, comprising: a preparation step of preparing a release film and a transfer sheet having the decorative layer; and an adhesion step of adhering the decorative layer and the non-combustible substrate on the transfer sheet to each other via an adhesive layer. [Effects of the Invention]

[0010] This disclosure offers the advantage of providing an exterior decorative panel that possesses both good design aesthetics and good destructive properties. [Brief explanation of the drawing]

[0011] [Figure 1] It is a schematic perspective view illustrating an exterior decorative panel according to the present disclosure. [Figure 2] It is a schematic cross-sectional view illustrating an exterior decorative panel according to the present disclosure. [Figure 3] It is a schematic cross-sectional view illustrating an exterior decorative panel according to the present disclosure. [Figure 4] It is a schematic perspective view illustrating a partition plate using the exterior decorative panel according to the present disclosure. [Figure 5] It is a schematic perspective view illustrating a transfer sheet according to the present disclosure. [Figure 6] It is a schematic cross-sectional view illustrating a method for producing an exterior decorative panel according to the present disclosure. [Figure 7] It is a schematic diagram showing a jig used in destructive evaluation according to the present disclosure. [Figure 8] It is a schematic diagram explaining destructive evaluation according to the present disclosure. MODE FOR CARRYING OUT THE INVENTION

[0012] Embodiments will be described below with reference to the drawings and the like. However, the present disclosure can be implemented in many different modes, and is not limited to the content described in the embodiments exemplified below. In addition, in order to make the description clearer, the drawings may schematically represent the width, thickness and shape of each part compared to actual forms, but this is merely an example and is not to be construed as limiting.

[0013] In this specification, when describing a manner in which one member is placed on another member, the term "above" or "below" includes, unless otherwise specified, both cases: when the other member is placed directly above or directly below the member so as to be in contact with it, and when the other member is placed above or below the member via yet another member. Similarly, in this specification, when describing a manner in which one member is placed on the surface of a member, the term "on the surface" includes, unless otherwise specified, both cases: when the other member is placed directly above or directly below the member so as to be in contact with it, and when the other member is placed above or below the member via yet another member.

[0014] The exterior decorative panels, transfer sheets, and methods for manufacturing exterior decorative panels as described in this disclosure will be explained in detail below.

[0015] A. Exterior decorative panels Figure 1 is a schematic perspective view illustrating an exterior decorative panel in this disclosure. Figure 2 is a schematic cross-sectional view illustrating an exterior decorative panel in this disclosure. As shown in Figures 1 and 2, the exterior decorative panel 100 comprises a decorative layer 10, an adhesive layer 20, and a non-combustible substrate 30, with the thickness direction D T In this case, they are present in this order. As shown in Figure 2, the decorative layer 10 may have a surface protection layer 1, a primer layer 2, and a design layer 3. In this disclosure, the thickness of the non-combustible substrate 30, the tensile strength and tensile elongation at break of the decorative layer 10, and the thickness of the adhesive layer 20 are each within a predetermined range.

[0016] According to this disclosure, by having the thickness of the non-combustible base material, the tensile strength and tensile elongation of the decorative layer, and the thickness of the adhesive layer all within predetermined ranges, an exterior decorative panel is obtained that has good aesthetic appeal and good fracture resistance. As mentioned above, one possible method for imparting aesthetic appeal to exterior members such as partitions is to paint the exterior members. However, when painting exterior members, it is difficult to express delicate designs. Furthermore, there are cases where the sense of unity with the design of members arranged around the exterior decorative panel (e.g., louvers) is low, or where it is difficult to obtain a high-quality aesthetic.

[0017] In contrast, by transferring a decorative layer to the exterior component using, for example, a transfer sheet, it becomes possible to express delicate designs. Furthermore, there are advantages such as enhancing the sense of unity with the design of the components arranged around the exterior decorative panel and making it easier to obtain a high-class design. On the other hand, in exterior decorative panels where the exterior component is decorated with a decorative layer, the presence of the decorative layer may make it difficult to destroy the exterior decorative panel in an emergency. The inventors of the present invention considered the destruction of the exterior decorative panel and investigated the configuration of the exterior decorative panel including the decorative layer. They focused on the thickness of the non-combustible base material, the tensile strength and tensile elongation at break of the decorative layer, and the thickness of the adhesive layer, and found that by controlling these within a predetermined range, it is possible to obtain an exterior decorative panel with good design and good destructibility.

[0018] 1. Nonflammable base material The exterior decorative panels in this disclosure have a non-combustible base material. Preferably, the non-combustible base material meets the criteria for non-combustible materials under the Building Standards Act in a heat generation test based on ISO 5660-1. Specifically, when the amount of heat generated during heating is measured using a cone calorimeter and the heating time that satisfies all of the following conditions (i) to (iii) is measured, the non-combustible material corresponds to a material whose heating time is 20 minutes or more. (i) Total heat output is 8 MJ / m³ 2 The following is (ii) The maximum heating rate exceeds 200 kW / m² for more than 10 seconds continuously. 2 Do not exceed (iii) No cracks or holes that penetrate to the back surface and are harmful to fire safety.

[0019] Examples of non-combustible substrates include fiber-reinforced cement board, gypsum board, concrete, brick, ceramic tile, mortar, and plaster. Among these, fiber-reinforced cement board is preferred because, in addition to being non-combustible, it is also excellent in durability, water resistance, and lightness. Fiber-reinforced cement board is specified in JIS A 5430:2018 and is classified into slate, calcium silicate board, and slag gypsum board. Slate is a product made mainly from cement, fibers, and admixtures, and is further classified into corrugated slate and slate board (flexible board). On the other hand, calcium silicate board is a product made mainly from calcareous raw materials, silicate raw materials, fibers, and admixtures. Slag gypsum board is a product made mainly from slag, gypsum, fibers, and admixtures.

[0020] The thickness of the non-combustible base material is usually 15 mm or less, but may be 12 mm or less, or 10 mm or less. If the non-combustible base material is too thick, the destructiveness of the exterior decorative panel will decrease. On the other hand, the thickness of the non-combustible base material is, for example, 1 mm or more, but may be 2 mm or more, 3 mm or more, or 4 mm or more. If the non-combustible base material is too thin, the durability may decrease.

[0021] 2. Makeup layer The exterior decorative panel in this disclosure has a decorative layer. By providing a decorative layer, an aesthetic design can be imparted to the non-combustible substrate. Furthermore, as will be described later, the decorative layer is preferably a transfer layer of a transfer sheet.

[0022] The tensile strength of the decorative layer is usually 1 N / mm or less. If the tensile strength of the decorative layer is too high, the fracture resistance of the exterior decorative panel will decrease. The tensile strength of the decorative layer may be 0.8 N / mm or less, 0.6 N / mm or less, or 0.4 N / mm or less. On the other hand, the tensile strength of the decorative layer is, for example, 0.05 N / mm or more. The tensile strength of the decorative layer is measured according to JIS P 8113. Specifically, the tensile strength (N / mm) is calculated by dividing the average value (N) of the maximum tensile load by the initial width (mm) of the test specimen.

[0023] The tensile elongation at break of the decorative layer is usually 50% or less. If the tensile elongation at break of the decorative layer is too high, the fracture resistance of the exterior decorative panel decreases. The tensile elongation at break of the decorative layer may be 40% or less, 30% or less, 20% or less, 10% or less, or 5% or less. On the other hand, the tensile elongation at break of the decorative layer is, for example, 0.05% or more. The tensile elongation at break of the decorative layer is measured according to JIS P 8113. Specifically, the tensile elongation at break is determined as a percentage of the initial test length.

[0024] From the standpoint of non-flammability, it is preferable that the organic mass of the decorative layer be low. For example, the organic mass of the decorative layer should be 30 g / m². 2 The following applies: 25g / m 2 It may also be less than 20g / m 2 The following may also apply. The organic mass is measured, for example, by an exothermic test based on ISO 5660-1.

[0025] The thickness of the decorative layer may be, for example, 50 μm or less, but may also be 40 μm or less, 30 μm or less, or 20 μm or less. If the decorative layer is too thick, the durability of the exterior decorative panel may decrease. On the other hand, the thickness of the decorative layer may be, for example, 5 μm or more, but may also be 8 μm or more. If the decorative layer is too thin, the aesthetic appeal of the exterior decorative panel may decrease.

[0026] The layer structure of the decorative layer is not particularly limited, but it is preferable to have a surface protection layer and a design layer. Furthermore, the decorative layer may have a primer layer between the surface protection layer and the design layer. On the other hand, it is preferable that the decorative layer does not have a base sheet (for example, a base sheet used for decorative sheets). It is also preferable that the decorative layer does not have a transparent resin layer (for example, a transparent resin layer used for decorative sheets).

[0027] (1) Surface protective layer The decorative layer in this disclosure may have a surface protection layer. Providing a surface protection layer improves the surface properties of the exterior decorative panel (e.g., scratch resistance and stain resistance).

[0028] The surface protective layer preferably contains a cured product of a curable resin composition as a resin component. The proportion of the cured product of the curable resin composition is, for example, 70% by mass or more, may be 90% by mass or more, may be 95% by mass or more, or may be 100% by mass, relative to the total resin components constituting the surface protective layer.

[0029] Examples of cured products of curable resin compositions include cured products of ionizing radiation-curable resin compositions and cured products of thermosetting resin compositions. Examples of ionizing radiation-curable resin compositions include electron beam-curable resin compositions and ultraviolet-curable resin compositions. Among these, electron beam-curable resin compositions are preferred because they do not require polymerization initiators, have less odor, and are less prone to discoloration.

[0030] An ionizing radiation-curable resin composition is a composition containing a compound having an ionizing radiation-curable functional group (hereinafter also referred to as "ionizing radiation-curable compound"). An ionizing radiation-curable functional group is a group that crosslinks and hardens upon irradiation with ionizing radiation, and examples include functional groups having an ethylenically double bond, such as a (meth)acryloyl group, a vinyl group, or an allyl group. In this disclosure, a (meth)acryloyl group refers to an acryloyl group or a metacloyl group.

[0031] Ionizing radiation refers to electromagnetic waves or charged particle beams that possess energy quanta capable of polymerizing or bridging molecules. Examples of ionizing radiation include electron beams (EB) and ultraviolet (UV). Other examples of ionizing radiation include electromagnetic waves such as X-rays and gamma rays, and charged particle beams such as alpha rays and ion beams.

[0032] The ionizing radiation-curable compound preferably contains, for example, one or more selected from the group consisting of urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, polyether (meth)acrylate, polycarbonate (meth)acrylate, and acrylic (meth)acrylate. In the present disclosure, the term "(meth)acrylate" refers to acrylate or methacrylate. Among these, the ionizing radiation-curable compound preferably contains at least urethane (meth)acrylate. The urethane (meth)acrylate is preferably a caprolactone-based urethane acrylate. This is because it facilitates improving the weather resistance and scratch resistance of the surface protective layer.

[0033] In addition, the ionizing radiation-curable compound may contain both caprolactone-based urethane acrylate and non-caprolactone-modified urethane (meth)acrylate. In this case, let the content of caprolactone-based urethane acrylate contained in the surface protective layer be M CLUA and let the content of non-caprolactone-modified urethane (meth)acrylate be M UA . Let M UA and M CLUA , the mass ratio of M CLUA to the total of M CLUA / (M UA +M CLUA )) is, for example, 40 mass% or more and 90 mass% or less, may be 45 mass% or more and 80 mass% or less, or may be 50 mass% or more and 70 mass% or less.

[0034] Caprolactone-based urethane acrylate can generally be obtained by a reaction of a caprolactone-based polyol, an organic isocyanate, and hydroxy (meth)acrylate. As a synthesis method, for example, there may be mentioned a method comprising reacting a polycaprolactone-based polyol with an organic polyisocyanate to produce a polyurethane prepolymer having -NCO groups (isocyanate groups) at both terminals, and then reacting the prepolymer with hydroxy (meth)acrylate.

[0035] As the caprolactone-based polyol, commercially available polyols can be used, preferably those having two hydroxyl groups and a number-average molecular weight of preferably 500 to 3,000, more preferably 750 to 2,000. In addition, polyols other than caprolactone-based polyols, such as ethylene glycol, diethylene glycol, 1,4-butanediol, and 1,6-hexanediol, can be used in any proportion by mixing one or more types. As the organic polyisocyanate, diisocyanates having two isocyanate groups are preferred, and from the viewpoint of suppressing yellowing, isophorone diisocyanate, hexamethylene diisocyanate, 4,4′-dicyclohexylmethane diisocyanate, trimethylhexamethylene diisocyanate, etc. are preferred. As the hydroxy(meth)acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, caprolactone-modified 2-hydroxyethyl acrylate, etc. are preferred.

[0036] When an ionizing radiation-curable resin composition contains a caprolactone-based polyol, the caprolactone-based urethane acrylate is preferably a caprolactone diol-based urethane acrylate. A caprolactone diol-based urethane acrylate refers to a urethane acrylate among caprolactone-based urethane acrylates in which the terminal end is diethylene glycol. By using a caprolactone diol-based urethane acrylate, cracking and whitening of the surface protective layer can be suppressed.

[0037] The number-average molecular weight of the ionizing radiation-curable compound is, for example, between 300 and 10,000, and may also be between 2,000 and 10,000. The number-average molecular weight is the average molecular weight measured by GPC analysis and converted to standard polystyrene.

[0038] For example, if the ionizing radiation-curable compound is an ultraviolet-curable compound, the ionizing radiation-curable composition preferably contains at least one of a photopolymerization initiator and a photopolymerization accelerator. Examples of photopolymerization initiators include acetophenone, benzophenone, α-hydroxyalkylphenone, Michler ketone, benzoin, benzyldimethyl ketal, benzoyl benzoate, α-acyloxime ester, acylphosphine oxide, and thioxanthones. Examples of photopolymerization accelerators include isoamyl p-dimethylaminobenzoate and ethyl p-dimethylaminobenzoate. Furthermore, the cured product of the thermosetting resin composition is similar to, for example, the cured product of the thermosetting resin composition used in the primer layer described later.

[0039] The surface protective layer preferably contains a weather-resistant agent. Examples of weather-resistant agents include ultraviolet absorbers and light stabilizers. Examples of ultraviolet absorbers include organic ultraviolet absorbers such as triazine-based ultraviolet absorbers, benzotriazole-based ultraviolet absorbers, benzophenone-based ultraviolet absorbers, oxybenzophenone-based ultraviolet absorbers, salicylic acid ester-based ultraviolet absorbers, and cyano(meth)acrylate-based ultraviolet absorbers, as well as inorganic ultraviolet absorbers such as titanium dioxide, cerium oxide, and zinc oxide. Among these, triazine-based ultraviolet absorbers are more preferred. Because triazine-based ultraviolet absorbers have high heat resistance, they can suppress the occurrence of bleed-out.

[0040] Examples of triazine-based UV absorbers include hydroxyphenyltriazine-based UV absorbers. Examples of hydroxyphenyltriazine-based UV absorbers include 2-(2-hydroxy-4-[1-octyloxycarbonylethoxy]phenyl)-4,6-bis(4-phenylphenyl)-1,3,5-triazine, 2-[4-[(2-hydroxy-3-dodecyloxypropyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, and 2,4-bis[2-hydroxy-4-butoxyphenyl]-6-(2,4-dibutoxyphenyl)-1,3,5-triazine. Examples include azine, 2-[4-[(2-hydroxy-3-tridecyloxypropyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-[4-[(2-hydroxy-3-(2'-ethyl)hexyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, and 2-(4,6-diphenyl-1,3,5-triazine-2-yl)-5[2-(2-ethylhexanoyloxy)ethoxy]phenol.

[0041] The amount of UV absorber contained in the surface protective layer is, for example, 0.5 parts by mass or more and 10 parts by mass or less per 100 parts by mass of resin component, and may be 0.8 parts by mass or more and 8 parts by mass or 1 part by mass or more and 5 parts by mass. If the amount of UV absorber is too high, bleed-out of the UV absorber may occur, and if the amount of UV absorber is too low, sufficient UV absorption performance may not be obtained.

[0042] Examples of light stabilizers included in the surface protective layer include hindered amine-based light stabilizers. Examples of hindered amine-based light stabilizers include 1,2,2,6,6-pentamethyl-4-piperidinyl methacrylate, bis(1,2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis(2,2,6,6-pentamethyl-4-piperidyl) sebacate, bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, methyl(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, and 2,4-bis[N-butyl-N-(1-cyclohexyloxy-2,2,6,6-tetramethylpiperidine-4-yl)amino]-6-(2-hydroxyethylamine)-1,3,5-triazine).

[0043] The amount of light stabilizer contained in the surface protective layer is, for example, 1 to 10 parts by mass per 100 parts by mass of resin component, and may be 1.5 to 8 parts by mass, or 2 to 5 parts by mass. If the amount of light stabilizer is too high, bleed-out of the light stabilizer may occur, and if the amount of light stabilizer is too low, sufficient light stability may not be obtained.

[0044] The surface protective layer may contain additives such as silicone compounds, polymerization inhibitors, crosslinking agents, antistatic agents, adhesion enhancers, antioxidants, leveling agents, thixotropic agents, coupling agents, plasticizers, antifouling agents, defoaming agents, and fillers. The thickness of the surface protective layer may be, for example, 2 μm to 20 μm, 3 μm to 15 μm, or 4 μm to 10 μm. If the surface protective layer is too thin, sufficient surface properties (e.g., scratch resistance and stain resistance) may not be obtained, and if the surface protective layer is too thick, the non-flammability of the exterior decorative panel may decrease.

[0045] (2) Design layer The decorative layer in this disclosure may have a design layer. The design layer is usually located on the adhesive layer side of the surface protection layer. Furthermore, providing a design layer improves the aesthetic appeal of the exterior decorative panel. The design layer and the surface protection layer may be in direct contact with each other, or they may be arranged with other layers in between.

[0046] Examples of design layers include solid color layers (layers with solid ink coverage) and pattern layers (layers with printed ink). Examples of patterns (designs) in the pattern layer include wood grain, stone patterns, sand patterns, tile patterns, brick patterns, fabric patterns, leather patterns, geometric figures, letters, symbols, abstract patterns, and floral patterns. The decorative layer may have a pattern layer and a solid color layer in that order from the surface protection layer side as design layers.

[0047] The design layer typically contains a coloring agent and a binder resin. Examples of coloring agents include inorganic pigments such as carbon black (ink), iron black, titanium white, antimony white, lead yellow, titanium yellow, reddish-brown, cadmium red, ultramarine, and cobalt blue; organic pigments (including dyes) such as quinacridone red, isoindolinone yellow, nickel azo complex, phthalocyanine blue, and azomethine azoblack; metallic pigments such as aluminum and brass; and pearl pigments such as titanium dioxide-coated mica and basic lead carbonate.

[0048] Examples of binder resins include urethane resins, acrylic polyol resins, (meth)acrylic resins, ester resins, amide resins, butyral resins, styrene resins, urethane-acrylic copolymers, vinyl chloride-vinyl acetate copolymers, vinyl chloride-vinyl acetate-acrylic copolymers, chlorinated propylene resins, nitrocellulose resins, and cellulose acetate resins.

[0049] The design layer may contain additives such as ultraviolet absorbers, light stabilizers, curing agents, plasticizers, and catalysts, as needed. The thickness of the design layer may be, for example, 0.5 μm or more and 20 μm or less, 1 μm or more and 10 μm or less, or 2 μm or more and 5 μm or less.

[0050] (3) Primer layer The decorative layer in this disclosure may have a primer layer between the surface protection layer and the design layer. Providing a primer layer improves the adhesion between the surface protection layer and the design layer. The primer layer and the surface protection layer may be arranged in direct contact or with other layers in between. Similarly, the primer layer and the design layer may be arranged in direct contact or with other layers in between.

[0051] The primer layer preferably contains a cured product of a curable resin composition (particularly a cured product of a thermosetting resin composition). The thermosetting resin composition is a composition containing at least a thermosetting resin, and is a resin composition that hardens upon heating. Examples of thermosetting resins include (meth)acrylic resins, urethane resins, urethane acrylic resins, phenolic resins, urea melamine resins, epoxy resins, unsaturated polyester resins, and silicone resins. The thermosetting resin composition may also be obtained by adding a curing agent such as an isocyanate curing agent or an epoxy curing agent to these resins.

[0052] The cured product of the thermosetting resin composition is preferably a cured product of a thermosetting resin composition containing a (meth)acrylic resin, a urethane resin, or a urethane-acrylic resin, and more preferably a cured product of a thermosetting resin composition containing a urethane-acrylic resin. Furthermore, the thermosetting resin composition preferably contains an isocyanate-based curing agent or an epoxy-based curing agent to make the structure of the cured product more rigid, and more preferably contains an isocyanate-based curing agent.

[0053] When the primer layer contains a urethane acrylic resin, the urethane acrylic resin is preferably a urethane acrylic copolymer, and more preferably a polycarbonate-based urethane acrylic copolymer. The polycarbonate-based urethane acrylic copolymer is a resin obtained by radical polymerization of an acrylic monomer to a polycarbonate-based polyurethane polymer obtained by reacting a polycarbonate diol with a (di)isocyanate.

[0054] Examples of (di)isocyanates include aromatic isocyanates such as 4,4'-diphenylmethane diisocyanate, 2,4-tole diisocyanate, 1,5-naphthalene diisocyanate, n-isocyanate phenylsulfonyl isocyanate, o-isocyanate phenylsulfonyl isocyanate, and p-isocyanate phenylsulfonyl isocyanate; aliphatic isocyanates such as 1,6-hexamethylene diisocyanate; and alicyclic isocyanates such as isophorone diisocyanate, hydrogenated xylylene diisocyanate, and hydrogenated diphenylmethane diisocyanate.

[0055] Examples of acrylic monomers include alkyl esters of (meth)acrylate such as (meth)acrylic acid, methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, n-butyl (meth)acrylate, and isobutyl (meth)acrylate.

[0056] In a polycarbonate-based urethane-acrylic copolymer, the mass ratio of the urethane component to the total of the acrylic and urethane components ([urethane component] / ([acrylic component]+[urethane component]) is, for example, 75% by mass or more and 95% by mass or less, and may be 80% by mass or more and 90% by mass or less. By setting the above mass ratio to 75% by mass or more, the proportion of the polycarbonate structure in the polycarbonate-based urethane-acrylic copolymer can be increased, making the structure of the polycarbonate-based urethane-acrylic copolymer more rigid. Therefore, deformation due to temperature changes can be reduced. Furthermore, by setting the above mass ratio to 95% by mass or less, it becomes easier to ensure the flexibility of the primer layer, and the adhesion between the surface protection layer and the design layer is improved.

[0057] The primer layer preferably contains a weathering agent. Examples of weathering agents include ultraviolet absorbers and light stabilizers. The preferred types and forms of weathering agents are the same as those described in "(1) Surface protective layer" above. In particular, the primer layer preferably contains a triazine-based ultraviolet absorber. Furthermore, the primer layer preferably contains a hindered amine-based light stabilizer.

[0058] The amount of UV absorber contained in the primer layer is, for example, 0.1 parts by mass or more and 50 parts by mass or less per 100 parts by mass of resin component, and may be 3 parts by mass or more and 40 parts by mass or 10 parts by mass or more and 35 parts by mass. Furthermore, the amount of UV absorber contained in the primer layer (per 100 parts by mass of resin component) may be greater than the amount of UV absorber contained in the surface protective layer (per 100 parts by mass of resin component).

[0059] The amount of light stabilizer contained in the primer layer is, for example, 0.1 parts by mass or more and 15 parts by mass or less per 100 parts by mass of resin component, and may be 1 part by mass or more and 15 parts by mass or 3 parts by mass or more and 10 parts by mass. Furthermore, the amount of light stabilizer contained in the primer layer (per 100 parts by mass of resin component) may be greater than the amount of light stabilizer contained in the surface protective layer (per 100 parts by mass of resin component).

[0060] The primer layer may contain additives such as silicone compounds, polymerization inhibitors, crosslinking agents, antistatic agents, adhesion enhancers, antioxidants, leveling agents, thixotropic agents, coupling agents, plasticizers, antifouling agents, defoamers, and fillers. The thickness of the primer layer may be, for example, 2 μm to 10 μm, 3 μm to 8 μm, or 3 μm to 5 μm. If the primer layer is too thin, the adhesion between the surface protection layer and the design layer may be insufficient, and if the primer layer is too thick, the non-flammability of the exterior decorative panel may decrease.

[0061] 3.Adhesive layer The exterior decorative panel in this disclosure has an adhesive layer between the decorative layer and the non-combustible substrate. The adhesive layer and the non-combustible substrate may be in direct contact or may be separated by other layers. Similarly, the adhesive layer and the decorative layer may be in direct contact or may be separated by other layers.

[0062] The adhesive layer contains a resin. Examples of the resins include ethylene-vinyl acetate copolymer (EVA), ethylene-methyl methacrylate copolymer (EMMA), ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl acrylate copolymer (EMA), ethylene-methacrylic acid copolymer (EMAA), (meth)acrylic resins, styrene resins, ester resins, urethane resins, chlorinated polyolefins, vinyl chloride-vinyl acetate copolymers, polyvinyl butyral, alkyd resins, petroleum resins, ketone resins, epoxy resins, melamine resins, fluororesins, silicone resins, and rubber resins.

[0063] The thickness of the adhesive layer is usually 110 μm or less. The thickness of the adhesive layer may be 100 μm or less, 90 μm or less, 80 μm or less, 70 μm or less, 60 μm or less, or 50 μm or less. If the adhesive layer is too thick, the destructiveness of the exterior decorative panel will decrease. On the other hand, the thickness of the adhesive layer may be, for example, 3 μm or more, 5 μm or more, 6 μm or more, 7 μm or more, 8 μm or more, 9 μm or more, or 10 μm or more. If the adhesive layer is too thin, the aesthetic appeal of the exterior decorative panel may decrease.

[0064] 4. Exterior decorative panels As shown in Figure 2, the exterior decorative panel 100 consists of a decorative layer 10 (surface protection layer 1, primer layer 2, and design layer 3), an adhesive layer 20, and a non-combustible base material 30, in the thickness direction D TIn this order, they are present. Also, as shown in Figure 2, the exterior decorative panel 100 may have a decorative layer 10 on one side of the non-combustible base material 30, but may not have a decorative layer 10 on the other side of the non-combustible base material 30.

[0065] On the other hand, as shown in Figure 3, decorative layers 10 (10a, 10b) may be arranged on both sides of the non-combustible base material 30. That is, as shown in Figure 3, the exterior decorative panel 100 consists of the first decorative layer 10a, the first adhesive layer 20a, the non-combustible base material 30, the second adhesive layer 20b, and the second decorative layer 10b, arranged in the thickness direction D T In this configuration, the elements may be arranged in this order. The design is further enhanced by arranging the decorative layers 10 (10a, 10b) on both sides of the non-combustible substrate 30, respectively. The details of the first and second decorative layers are the same as those of the decorative layers described above. The details of the first and second adhesive layers are the same as those of the second adhesive layer described above.

[0066] The organic mass of the exterior decorative panel is, for example, 140 g / m². 2 The following is true: 130g / m 2 The following may also be true: 120g / m 2 The following is also acceptable. If the organic mass of the exterior decorative panel is high, the non-combustibility of the exterior decorative panel may decrease. On the other hand, the organic mass of the exterior decorative panel is, for example, 60 g / m². 2 That's all.

[0067] In this disclosure, the exterior decorative panels preferably meet the criteria for non-combustible materials under the Building Standards Act in a heat generation test based on ISO 5660-1. Details regarding non-combustible materials under the Building Standards Act are as described above.

[0068] The exterior decorative panels described herein are typically used outdoors. Examples of applications for exterior decorative panels include partition panels used to divide spaces outdoors. Examples of such partition panels include dividers used to separate passageways. These dividers are installed, for example, on balconies of buildings such as apartment complexes, office buildings, and factories, at the boundary between adjacent sections. Information such as evacuation instructions may be printed on the surface of the decorative layer of the divider panel.

[0069] As shown in Figure 4, the present disclosure provides a partition plate 200 having the exterior decorative panel 100 described above and a frame member 150 arranged on the outer edge of the exterior decorative panel 100. As shown in Figure 4, the partition plate 200 may have a plurality of exterior decorative panels 100.

[0070] B. Transfer sheet Figures 5(a) and 5(b) are schematic cross-sectional views illustrating a transfer sheet in this disclosure. As shown in Figure 5(a), the transfer sheet 50 has a release film 40 and a decorative layer 10. In Figure 5(a), the decorative layer 10 has a thickness direction D T In this case, the release film 40 may have, in order from the release film side, a surface protection layer 1, a primer layer 2, and a design layer 3. Also, as shown in Figure 5(b), the transfer sheet 50 may have an adhesive layer 20 at a position opposite to the surface protection layer 1, relative to the design layer 3. In this disclosure, the tensile strength and tensile elongation at break of the decorative layer are within a predetermined range.

[0071] According to this disclosure, a transfer sheet is available that allows for obtaining an exterior decorative panel having good design properties and good fracture resistance, provided that the tensile strength and tensile elongation at break of the decorative layer are both within predetermined ranges.

[0072] 1. Release film The release film is preferably a resin film. Examples of resins included in the resin film include ester resins, olefin resins, styrene resins, vinyl resins, (meth)acrylic resins, amide resins, imide resins, and carbonate resins.

[0073] The release film preferably contains an ester resin or an olefin resin. Examples of ester resins include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), and polyethylene terephthalate-isophthalate copolymer. Among these, PET or PBT are preferred, and PET is more preferred, from the viewpoint of being less susceptible to thermal shrinkage during the manufacture of the transfer sheet and shrinkage due to irradiation with ionizing radiation.

[0074] Examples of olefin resins include polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, and ethylene-propylene-butene copolymer. Among these, polypropylene is preferred from the viewpoint of being less susceptible to thermal shrinkage during the manufacture of the transfer sheet and shrinkage due to irradiation with ionizing radiation.

[0075] The release film may be a stretched film or an unstretched film. The stretching ratio in the mechanical direction (MD) of the stretched film is, for example, 5 times or more and 30 times or less. The stretching ratio in the width direction (TD) of the stretched film is, for example, 5 times or more and 30 times or less. The thickness of the release film is, for example, 10 μm or more and 200 μm or less, may be 15 μm or more and 150 μm or less, or 20 μm or more and 100 μm or less.

[0076] 2. Transfer sheet As shown in Figure 5(a), the transfer sheet 50 typically has a decorative layer 10. Also, as shown in Figure 5(b), the transfer sheet 50 may have an adhesive layer 20 on the opposite side of the surface protection layer 1, relative to the design layer 3. The decorative layer and adhesive layer are the same as those described in "A. Exterior Decorative Panels" above. The decorative layer in the transfer sheet is typically a transfer layer transferred to the non-combustible substrate side. Although not specifically shown, the transfer sheet may also have a separator on the opposite side of the decorative layer, relative to the adhesive layer. For example, this can suppress the occurrence of blocking when the transfer sheet is manufactured by winding it into a roll. Furthermore, the transfer sheet in this disclosure is typically used in the manufacture of exterior decorative panels as described in "A. Exterior Decorative Panels" above.

[0077] The method for producing the transfer sheet is not particularly limited, but one example is to form a surface protection layer on one side of a release film, then form a primer layer on the side of the surface protection layer opposite to the release film, and then form a design layer on the side of the primer layer opposite to the surface protection layer.

[0078] One method for forming a surface protective layer is to coat one side of a release film with a composition for forming the surface protective layer and then cure it. Examples of coating methods for the above composition include gravure printing, bar coating, roll coating, reverse roll coating, and comma coating. Examples of curing methods include irradiation with ionizing radiation such as electron beams and ultraviolet rays.

[0079] One method for forming the primer layer is to coat the surface of the surface protective layer opposite to the release film with a composition for forming the primer layer, and then cure it as necessary. Examples of coating methods for the above composition include gravure printing, bar coating, roll coating, reverse roll coating, and comma coating. An example of a curing method is heat. Another method for forming the design layer is to coat the surface of the primer layer opposite to the surface protective layer with an ink containing a colorant, a binder resin, and a solvent.

[0080] C. Manufacturing method of exterior decorative panels Figure 6 is a schematic cross-sectional view illustrating a method for manufacturing an exterior decorative panel according to this disclosure. As shown in Figure 6(a), a transfer sheet 50 having a release film 40 and a decorative layer 10 is prepared (preparation step). Next, as shown in Figure 6(b), the decorative layer 10 and the non-combustible substrate 30 on the transfer sheet 50 are adhered to each other via the adhesive layer 20 (adhesion step). Next, the release film 40 is peeled off from the decorative layer 10, thereby adhering the decorative layer 10, the adhesive layer 20, and the non-combustible substrate 30 in the thickness direction D T In this manner, an exterior decorative panel 100 having the following properties in this order is obtained. In this disclosure, the thickness of the non-combustible base material 30, the tensile strength and tensile elongation of the decorative layer 10, and the thickness of the adhesive layer 20 are all within predetermined ranges.

[0081] According to this disclosure, an exterior decorative panel having good aesthetic appeal and good fracture resistance can be obtained by having the thickness of the non-combustible base material, the tensile strength and tensile elongation of the decorative layer, and the thickness of the adhesive layer all within predetermined ranges.

[0082] 1.Preparation process The preparation step in this disclosure is the step of preparing a transfer sheet having a release film and a decorative layer. The transfer sheet is the same as described in "B. Transfer Sheet" above.

[0083] 2. Adhesion process The adhesion step in this disclosure is a step of adhering the decorative layer and the non-combustible substrate on the transfer sheet to each other via the adhesive layer.

[0084] The method for bonding the decorative layer in the transfer sheet to the non-combustible substrate via an adhesive layer is not particularly limited, and includes methods of applying pressure to the transfer sheet, adhesive layer, and non-combustible substrate. The pressure conditions are not particularly limited and should be adjusted to obtain the desired exterior decorative panel. Furthermore, the method for manufacturing the exterior decorative panel in this disclosure may include a peeling step of peeling the release film off the decorative layer after the bonding step. Alternatively, the release film may not be peeled off the decorative layer in the exterior decorative panel, and the release film may be used as a protective film for the exterior decorative panel.

[0085] 3. Exterior decorative panels The exterior decorative panel is obtained through the above process. The exterior decorative panel is the same as described in "A. Method for manufacturing the exterior decorative panel" above.

[0086] This disclosure is not limited to the embodiments described above. The embodiments described above are illustrative, and any configuration that is substantially identical to the technical idea described in the claims of this disclosure and achieves similar effects is included within the technical scope of this disclosure. [Examples]

[0087] [Example 1] (Preparation of transfer sheet) A 50 μm thick PET film was prepared as a release film. The PET film was coated with the following resin composition for forming the surface protective layer using the gravure reverse method. Subsequently, an electron beam (pressure voltage: 175 kV, 5 Mrad) was irradiated to form a 5 μm thick surface protective layer. <Resin composition for forming a surface protective layer> • Polyfunctional urethane acrylate (molecular weight approximately 1000): 60 parts by mass • Bifunctional caprolactone-modified urethane acrylate (molecular weight approximately several thousand): 40 parts by mass • Nanosilica (average particle size: less than 1 μm): 3 parts by mass • Hydroxyphenyltriazine-based UV absorber: 3 parts by mass • Hindered amine-based light stabilizer: 3 parts by mass

[0088] Next, using the resin composition for forming the design layer described below, a pattern layer and a solid color layer were sequentially printed onto the surface protective layer using the gravure direct printing method to form a design layer with a thickness of 5 μm. This resulted in obtaining a transfer sheet having a release film and a decorative layer (surface protective layer and design layer). <Resin composition for forming decorative layers> • Main component: Acrylic polyol resin: 100 parts by mass • Hardening agent (hexamethylene diisocyanate): 5 parts by mass Pigment: appropriate amount

[0089] (Fabrication of exterior decorative panels) A 4mm thick fiber-reinforced cement board (flexible board) was prepared as a non-combustible base material. Next, a sealer was applied to both sides of the fiber-reinforced cement board using an air spray, and after drying, it was polished with sandpaper. Then, the resin composition for forming the adhesive layer described below was applied to the design layer side of the transfer sheet to form an adhesive layer with a thickness of 20 μm. The transfer sheets with the adhesive layer formed were then bonded to both sides of the fiber-reinforced cement board. After curing at 40°C for 3 days, the release film was peeled off to obtain an exterior decorative panel having the following layers in the thickness direction: first decorative layer (first surface protective layer, first design layer), first adhesive layer, non-combustible base material, second adhesive layer, and second decorative layer (second design layer and second surface protective layer). <Resin composition for forming adhesive layer> • Polyurethane resin: 100 parts by mass • Curing agent (polyisocyanate compound): 5 parts by mass

[0090] [Examples 2 and 3] Except for changing the thickness of the adhesive layer to the values ​​shown in Table 1, an exterior decorative panel was obtained in the same manner as in Example 1.

[0091] [Example 4] Except for using a 4 mm thick fiber-reinforced cement board (calcium silicate board) as the non-combustible base material, an exterior decorative panel was obtained in the same manner as in Example 1.

[0092] [Example 5 and Comparative Example 1] Except for changing the thickness of the adhesive layer to the values ​​shown in Table 1, an exterior decorative panel was obtained in the same manner as in Example 1.

[0093] [Comparative Example 2] (Production of decorative sheets) The base material is a cellulose base material (main component: cellulose, other components: fixative, paper strength enhancer, pigment, basis weight: 30g / m²). 2 A cellulose substrate was prepared. A design layer (solid layer and pattern layer) was formed on the cellulose substrate, and then a surface protection layer was formed on the design layer to obtain a decorative sheet. The resin composition for forming the design layer and the surface protection layer was the same as in Example 1, and the conditions for producing the design layer and the surface protection layer were also the same as in Example 1.

[0094] (Fabrication of exterior decorative panels) A 4 mm thick fiber-reinforced cement board (flexible board) was prepared as a non-combustible base material. Next, a sealer was applied to both sides of the fiber-reinforced cement board using an air spray, and after drying, it was polished with sandpaper. Then, the same resin composition for forming the adhesive layer as in Example 1 was applied to the base material side of the decorative sheet to form an adhesive layer with a thickness of 20 μm. The decorative sheets with the adhesive layer were then bonded to both sides of the fiber-reinforced cement board. By curing at 40°C for 3 days, an exterior decorative panel was obtained having the following layers in the thickness direction: first decorative layer (first surface protective layer, first design layer, first base material), first adhesive layer, non-combustible base material, second adhesive layer, and second decorative layer (second base material, second design layer, and second surface protective layer).

[0095] [Comparative Example 3] Except for using a 60 μm thick polypropylene substrate (main component: mixture of polypropylene resin (PP) and polyethylene resin (PE) (PP:PE=90:10), other component: pigment (titanium dioxide)) as the base material for the decorative sheet, an exterior decorative panel was obtained in the same manner as in Comparative Example 3.

[0096] [Comparative Example 4] A 4mm thick fiber-reinforced cement board (flexible board) was prepared as a non-combustible base material. Acrylic resin paint was applied to both sides of the non-combustible base material using an air spray to obtain an exterior decorative panel.

[0097] [evaluation] (Tensile strength and tensile elongation at fracture) The tensile strength and tensile elongation at break of the decorative layer in the transfer sheets used in Examples 1-5 and Comparative Example 1 were measured. The tensile strength and tensile elongation at break of the decorative sheets used in Comparative Examples 2 and 3 were also measured. Specifically, the tensile strength and tensile elongation at break were measured according to JIS P 8113. The measurement conditions were an elongation rate of 20 mm / min and a sample size of 180 mm in length (distance between chucks) and 15 mm in width. The results are shown in Table 1.

[0098] (Design) The aesthetic appeal of the exterior decorative panels obtained in Examples 1-5 and Comparative Examples 1-4 was evaluated. Specifically, the exterior decorative panels were visually inspected and evaluated according to the following criteria. The results are shown in Table 1. ○: Of the 10 observers, 8 or more judged the design to be of high quality. △: Of the 10 observers, 4 to 7 judged the design to have a sense of luxury. ×: Out of 10 observers, 3 or fewer judged the design to be of high quality.

[0099] (Destructive) The exterior decorative panels obtained in Examples 1-5 and Comparative Examples 1-4 were evaluated for their destructive properties. Specifically, tests were conducted in accordance with JIS K 5600-5-3 (DuPont method). The measurement conditions were as follows: Sample size: 8cm long, 3.5cm wide Firing mold and base: Radius 6.35mm ± 0.03mm Weight height: 200mm Weight mass: 300g

[0100] First, a mark was made in the center of the sample (exterior decorative panel). Next, the ring shown in Figure 7 (13 mm high, 20 mm wide, with a hollow diameter of 40 mm) was placed on the support stand. Then, the sample was placed on the ring. At this time, the position was adjusted so that the mold would fall in the center of the sample. The sample was also positioned on the ring so that the first decorative layer of the sample was close to the mold and the second decorative layer of the sample was farther from the mold. Next, a weight was dropped from a predetermined height, and the condition of the exterior decorative panel thereafter was evaluated according to the following criteria. The results are shown in Table 1. ○: The first decorative layer, non-combustible base material, and second decorative layer are cracked. ○△: The non-combustible base material and the second decorative layer are cracked, and the first decorative layer is partially cracked. The width of the cracked portion in the first decorative layer is 95% or more of the total width of the sample. △: The non-combustible substrate and the second decorative layer are cracked, and the first decorative layer is partially cracked. The width of the cracked portion in the first decorative layer is less than 95% of the total width of the sample. ×: The first decorative layer, non-combustible base material, and second decorative layer are not cracked.

[0101] The evaluation criteria are supplemented using Figure 8. As shown in Figures 8(a) and (b), if the first decorative layer 10a, the non-combustible substrate 30, and the second decorative layer 10b are cracked, it is evaluated as ○. On the other hand, as shown in Figures 8(c) to (e), if the non-combustible substrate 30 and the second decorative layer 10b are cracked, a part of the first decorative layer 10a is cracked, and a part of the first decorative layer 10a is not cracked, it is evaluated as ○△ or △. Specifically, as shown in Figure 8(c), if the width of the cracked part in the first decorative layer 10 is W1 and the width of the entire sample is W2, it is evaluated as ○△ if W1 / W2 ≥ 0.95, and as △ if W1 / W2 < 0.95.

[0102] [Table 1]

[0103] As shown in Table 1, Examples 1-5 exhibited good aesthetic appeal and durability. In particular, Examples 1-4 had better aesthetic appeal than Example 5. Regarding durability, Examples 1, 2, 4, and 5 exhibited better durability than Example 3. On the other hand, Comparative Examples 1-4 were found to have poor aesthetic appeal or durability. Specifically, Comparative Example 1 had a thicker adhesive layer, which improved shock absorption against weights and increased flexibility of the decorative layer, resulting in lower durability. Comparative Example 2 had a higher tensile strength of the decorative layer, making it less likely for the decorative layer to break even when the exterior decorative panel was bent, thus lowering durability. Similarly, Comparative Example 3 had a higher tensile elongation at break of the decorative layer, making it less likely for the decorative layer to break even when the exterior decorative panel was bent, resulting in significantly lower durability. Furthermore, Comparative Example 4 was painted, which prevented the creation of delicate designs and resulted in poor aesthetic appeal.

[0104] Thus, the present disclosure provides, for example, the following inventions.

[0105] [1] It is an exterior decorative panel, The above-mentioned exterior decorative panel has a decorative layer, an adhesive layer, and a non-combustible base material in this order in the thickness direction. The thickness of the above non-combustible substrate is 15 mm or less. The tensile strength of the above cosmetic layer is 1 N / mm or less. The tensile elongation at break of the above cosmetic layer is 50% or less. The thickness of the adhesive layer described above is 110 μm or less, for exterior decorative panels.

[0106] [2] The above non-combustible substrate is the exterior decorative panel described in [1] which, in a heat generation test based on ISO 5660-1, falls under the category of non-combustible material under the Building Standards Act.

[0107] [3] The above non-combustible base material is a fiber-reinforced cement board, as described in [1] or [2], for exterior decorative panels.

[0108] [4] The above fiber-reinforced cement board is a flexible board, as described in [3], an exterior decorative board.

[0109] [5] The above fiber-reinforced cement board is a calcium silicate board, as described in [3].

[0110] [6] The exterior decorative panel according to any one of [1] to [5], wherein the tensile elongation at break of the decorative layer is 5% or less.

[0111] [7] The exterior decorative panel according to any one of [1] to [6], wherein the thickness of the decorative layer is 20 μm or less.

[0112] [8] The decorative panel according to any one of [1] to [7], wherein the decorative layer comprises a surface protection layer and a design layer disposed on the adhesive layer side of the surface protection layer.

[0113] [9] The exterior decorative panel according to [8], wherein the surface protective layer contains a cured product of an ionizing radiation-curable resin composition.

[0114]

[10] The exterior decorative panel according to [8], wherein the surface protective layer contains at least one of an ultraviolet absorber and a light stabilizer.

[0115]

[11] The thickness of the adhesive layer is 50 μm or less, as described in any of [1] to

[10] , for exterior decorative panels.

[0116]

[12] The thickness of the adhesive layer is 5 μm or more, as described in any of [1] to

[11] .

[0117]

[13] The exterior decorative panel is the exterior decorative panel according to any one of [1] to

[12] , wherein the decorative layer, the adhesive layer, the non-combustible substrate, the second adhesive layer, and the second decorative layer are arranged in this order in the thickness direction.

[0118]

[14] The above exterior decorative panel is an exterior decorative panel described in any of [1] to

[13] , used as a partition panel to divide a passageway.

[0119]

[15] A transfer sheet used for exterior decorative panels as described in any of [1] to

[14] , The above transfer sheet is a transfer sheet having a release film and the above cosmetic layer.

[0120]

[16] A method for manufacturing exterior decorative panels, comprising manufacturing any of the exterior decorative panels described in [1] to

[14] , A preparation step of preparing a release film and a transfer sheet having the above-mentioned decorative layer, The above-mentioned adhesion step involves adhering the above-mentioned decorative layer and the above-mentioned non-combustible substrate to the above-mentioned transfer sheet via the above-mentioned adhesive layer, A method for manufacturing exterior decorative panels. [Explanation of symbols]

[0121] 1 … Surface protective layer 2… Primer layer 3. Design layer 10… Makeup layer 20…Adhesive layer 30 … Nonflammable base material 40… Release film 50… Transfer sheet 100 ... Exterior decorative panels

Claims

1. It is an exterior decorative panel, The aforementioned exterior decorative panel has a decorative layer, an adhesive layer, and a non-combustible base material in this order in the thickness direction. The thickness of the non-combustible substrate is 15 mm or less. The tensile strength of the aforementioned cosmetic layer is 1 N / mm or less. The tensile elongation at break of the aforementioned cosmetic layer is 50% or less. The thickness of the adhesive layer is 110 μm or less, in the exterior decorative panel.

2. The exterior decorative panel according to claim 1, wherein the non-combustible base material is a non-combustible material according to the Building Standards Act in a heat generation test based on ISO 5660-1.

3. The exterior decorative panel according to claim 1, wherein the non-combustible base material is a fiber-reinforced cement board.

4. The exterior decorative panel according to claim 3, wherein the fiber-reinforced cement board is a flexible board.

5. The exterior decorative panel according to claim 3, wherein the fiber-reinforced cement board is a calcium silicate board.

6. The exterior decorative panel according to claim 1, wherein the tensile elongation at break of the decorative layer is 5% or less.

7. The exterior decorative panel according to claim 1, wherein the thickness of the decorative layer is 20 μm or less.

8. The exterior decorative panel according to claim 1, wherein the decorative layer comprises a surface protection layer and a design layer disposed on the adhesive layer side of the surface protection layer.

9. The exterior decorative panel according to claim 8, wherein the surface protective layer contains a cured product of an ionizing radiation-curable resin composition.

10. The exterior decorative panel according to claim 8, wherein the surface protective layer contains at least one of an ultraviolet absorber and a light stabilizer.

11. The exterior decorative panel according to claim 1, wherein the thickness of the adhesive layer is 50 μm or less.

12. The exterior decorative panel according to claim 1, wherein the thickness of the adhesive layer is 5 μm or more.

13. The exterior decorative panel according to claim 1, wherein the exterior decorative panel has the decorative layer, the adhesive layer, the non-combustible base material, the second adhesive layer, and the second decorative layer in this order in the thickness direction.

14. The exterior decorative panel according to claim 1, wherein the exterior decorative panel is used as a partition panel to divide a passageway.

15. A transfer sheet used in an exterior decorative panel according to any one of claims 1 to 14, The transfer sheet comprises a release film and the decorative layer.

16. A method for manufacturing an exterior decorative panel, comprising manufacturing an exterior decorative panel according to any one of claims 1 to 14, A preparation step of preparing a transfer sheet having a release film and the decorative layer, The process includes an adhesion step in which the decorative layer and the non-combustible substrate on the transfer sheet are adhered to each other via the adhesive layer, A method for manufacturing exterior decorative panels.

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