Transfer sheet and method for manufacturing exterior member

Abstract

To provide a transfer sheet that enables production of an exterior member exhibiting excellent weatherability and having a design that takes advantage of the see-through visibility of a transparent resin member.SOLUTION: A transfer sheet for manufacturing an exterior member having a transparent resin member is provided, the transfer sheet including a release film and a transfer layer disposed on one surface of the release film, the transfer layer including, in this order in a thickness direction from the release film side, a first protective layer, a second protective layer, and a pattern layer, the first protective layer and the second protective layer having a weatherproofing agent, the transfer layer having a low-concealment region, in which a concealment rate measured in conformity with JIS K 5600-4-1 is 50% or less. In the low-concealment region, ultraviolet transmittance is 1% or less and visible light transmittance is 40% or more.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a method for manufacturing a transfer sheet and an exterior member.

Background Art

[0002] For example, as an interior or exterior member of a building, a decorative member having a substrate and a decorative sheet is used. When the substrate is a transparent resin member, by taking advantage of the transmissive visibility, a unique design (a design with a sense of transparency) can be obtained. In addition, the range of design variations that can be expressed is widened. However, the decorative sheet generally has a base material layer, and this base material layer may be colored. For example, Patent Document 1 describes a decorative sheet in which a printing layer, an adhesive layer, an anchor layer, and an overlay film layer are laminated in this order on one surface of a colored base material layer made of a thermoplastic resin. Further, since the decorative sheet itself has a relatively large thickness, it may affect the design. Therefore, when using a decorative sheet, there is room for improvement in the design expression that takes advantage of the transmissive visibility of the transparent resin member. In addition, exterior members are required to have higher weather resistance than interior members in order to suppress deterioration due to outdoor exposure, particularly deterioration due to the influence of ultraviolet rays.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In order to take advantage of the transmissive visibility of the transparent resin member as the substrate, the inventors of the present application considered using a transfer sheet having a release film and a transfer layer including at least a pattern layer, and providing the pattern layer on the transparent resin member by a transfer method. When using a transfer sheet, since it is not necessary to use the base material layer in the decorative sheet, it is difficult to inhibit the transmissive visibility of the transparent resin member.

[0005] In addition, in order to obtain excellent weather resistance, the inventors of the present application considered disposing a protective layer (weather-resistant layer) in addition to the pattern layer in the transfer layer of the transfer sheet. That is, a transfer sheet having a release film, a protective layer, and a pattern layer in this order was used, and it was considered to provide a pattern layer and a protective layer on a transparent resin member by a transfer method.

[0006] Since high weather resistance is required for exterior members, it is preferable that the ultraviolet transmittance of the transfer layer is as low as possible. In order to reduce the ultraviolet transmittance of the transfer layer, it is effective to increase the amount of weather-resistant agent used in the protective layer. When the amount of weather-resistant agent used is increased, yellowing due to the weather-resistant agent is likely to occur. Therefore, the visible light transmittance of the transfer layer decreases, and it becomes difficult to obtain a design that takes advantage of the transmissive visibility of the transparent resin member. On the other hand, if the visible light transmittance of the transfer layer is increased in order to take advantage of the transmissive visibility of the transparent resin member, it becomes difficult to sufficiently reduce the ultraviolet transmittance of the transfer layer. As a result, it becomes difficult to obtain good weather resistance.

[0007] The present disclosure has been made in view of the above circumstances, and the main object is to provide a transfer sheet capable of manufacturing an exterior member having good weather resistance and a design that takes advantage of the transmissive visibility of a transparent resin member.

Means for Solving the Problems

[0008] In the present disclosure, there is provided a transfer sheet for manufacturing an exterior member having a transparent resin member, the transfer sheet having a release film and a transfer layer disposed on one surface of the release film, the transfer layer having, in the thickness direction, a first protective layer, a second protective layer, and a pattern layer in this order from the release film side, the first protective layer and the second protective layer having a weather-resistant agent, the transfer layer having a low hiding region where the hiding rate measured in accordance with JIS K 5600-4-1 is 50% or less, and in the low hiding region, the ultraviolet transmittance is 1% or less and the visible light transmittance is 40% or more.

[0009] In the present disclosure, there is provided a method for manufacturing an exterior member having a transparent resin member, the method including a preparation step of preparing the transfer sheet described above, and a lamination step of laminating the transfer sheet on the transparent resin member such that the surface of the transfer sheet on the pattern layer side faces the transparent resin member.

Effect of the Invention

[0010] In the present disclosure, there is an effect that an exterior member having good weather resistance and a design that makes use of the transmissive visibility of the transparent resin member can be obtained.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Embodiments 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 should not be limited to the description content of the embodiments exemplified below. Also, for the purpose of making the description clearer, the drawings may schematically represent the width, thickness, and shape of each part compared to the actual form, but this is merely an example and should not be construed as a limitation.

[0013] In this specification, when expressing the manner of arranging one member relative to another member, if simply denoted as "above" or "below" without any particular notice, it includes both the case where another member is arranged directly above or directly below so as to be in contact with a certain member, and the case where another member is arranged above or below a certain member with yet another member interposed therebetween. Also, in this specification, when expressing the manner of arranging one member relative to the surface of another member, if simply denoted as "on the surface" without any particular notice, it includes both the case where another member is arranged directly above or directly below so as to be in contact with a certain member, and the case where another member is arranged above or below a certain member with yet another member interposed therebetween.

[0014] Hereinafter, the transfer sheet, the manufacturing method of the exterior member, and the exterior member in the present disclosure will be described in detail.

[0015] A. Transfer sheet FIG. 1 is a schematic cross-sectional view illustrating a transfer sheet in the present disclosure. The transfer sheet 10 shown in FIG. 1 has a release film 1 and a transfer layer 2 disposed on one surface of the release film 1. The transfer layer 2 has, from the release film 1 side, a first protective layer 3, a second protective layer 4, and a pattern layer 5 in this order in the thickness direction D T In the present disclosure, the transfer layer 2 has a low concealment region with a concealment rate measured in accordance with JIS K 5600-4-1 of 50% or less. In the above low concealment region, the ultraviolet transmittance is 1% or less, and the visible light transmittance is 40% or more.

[0016] FIG. 2 is a schematic cross-sectional view illustrating a method for manufacturing an exterior member having a transparent resin member using the transfer sheet 10 shown in FIG. 1. First, as shown in FIG. 2(a), the above-described transfer sheet 10 is prepared. The transfer layer 2 shown in FIG. 2(a) is in the thickness direction D TIn this case, an adhesive layer 6 is provided on the side opposite to the second protective layer 4 with respect to the pattern layer 5. Next, as shown in FIG. 2(b), the transfer sheet 10 is laminated on the transparent resin member 20 such that the adhesive layer 6 in the transfer sheet 10 faces the transparent resin member 20. Next, as shown in FIG. 2(c), the release film 1 is peeled off from the transfer sheet 10. As a result, the transfer layer 2 in the transfer sheet 10 is transferred to the transparent resin member 20 side, and the first protective layer 3, the second protective layer 4, the pattern layer 5, the adhesive layer 6, and the transparent resin member 20 are arranged in this order in the thickness direction D T to obtain an exterior member 100 having them in this order.

[0017] According to the present disclosure, in the low-concealment region of the transfer layer, the ultraviolet transmittance is 1% or less and the visible light transmittance is 40% or more. Therefore, the exterior member has good weather resistance and a design that takes advantage of the transmissive visibility of the transparent resin member. As described above, since high weather resistance is required for the exterior member, it is preferable that the ultraviolet transmittance of the transfer layer be as low as possible. To reduce the ultraviolet transmittance of the transfer layer, it is effective to increase the amount of weathering agent used in the protective layer. When the amount of weathering agent used is increased, yellowing due to the weathering agent is likely to occur. As a result, the visible light transmittance of the transfer layer decreases, and it becomes difficult to obtain a design that takes advantage of the transmissive visibility of the transparent resin member. On the other hand, if the visible light transmittance of the transfer layer is increased to take advantage of the transmissive visibility of the transparent resin member, it becomes difficult to sufficiently reduce the ultraviolet transmittance of the transfer layer. As a result, it becomes difficult to obtain good weather resistance.

[0018] In the present disclosure, paying attention to achieving both improvement of weather resistance and utilization of the transmissive visibility of the transparent resin member, intensive research was conducted, and as a result, it was found that by setting the ultraviolet transmittance and the visible light transmittance in the low-concealment region within a predetermined range, the above-mentioned compatibility can be achieved.

[0019] In addition, the transfer sheet in the present disclosure is usually used for manufacturing an exterior member having a transparent resin member. Higher weather resistance is required for exterior members (outdoor members) compared to interior members (indoor members). For example, when manufacturing an exterior member using a decorative sheet, a resin film layer may be provided on the decorative sheet for the purpose of improving strength. In this case, since the resin film layer is a relatively thick layer, high weather resistance is imparted by adding a sufficient amount of a weathering agent to the resin film layer, for example. On the other hand, it is highly technically difficult to impart high weather resistance to a transfer sheet that does not have a layer corresponding to the resin film layer. In the present disclosure, usually, both the first protective layer and the second protective layer contain a weathering agent. Thereby, high weather resistance can be imparted while maintaining the properties required for the first protective layer (for example, surface properties such as abrasion resistance) and the properties required for the second protective layer (for example, adhesion).

[0020] Also, in the case of a transfer sheet, the adhesion between the first protective layer and the second protective layer is likely to be insufficient. Here, in the case of a decorative sheet, usually, a pattern layer is formed on a base material layer, then a second protective layer is formed on the pattern layer, and then a first protective layer is formed on the second protective layer. Since the first protective layer is typically produced by curing a resin composition for the first protective layer formed on the second protective layer, the adhesion between the first protective layer and the second protective layer is good. On the other hand, in the case of a transfer sheet, usually, a first protective layer is formed on a release film, then a second protective layer is formed on the first protective layer, and then a pattern layer is formed on the second protective layer. The first protective layer is typically produced by curing a resin composition for the first protective layer on the release film. Since the second protective layer is formed on the cured first protective layer, the adhesion between the first protective layer and the second protective layer is likely to be insufficient. In the present disclosure, it is preferable that the second protective layer is a layer having higher flexibility than the first protective layer. Thereby, the adhesion between the first protective layer and the second protective layer can be increased.

[0021] 1. Transfer layer The transfer layer in the present disclosure has at least a first protective layer, a second protective layer, and a pattern layer in this order from the release film side.

[0022] (1) Hiding rate The transfer layer in the present disclosure has a low hiding region with a hiding rate of 50% or less measured in accordance with JIS K 5600-4-1. Specifically, the transfer layer in the present disclosure has at least a low hiding region with a hiding rate of 50% or less when viewed in a plan view. On the other hand, the transfer layer in the present disclosure may or may not have a region (high hiding region) with a hiding rate greater than 50% when viewed in a plan view. The high hiding region is a region where the pattern layer is thick and there is no need to utilize the transmissive visibility of the transparent resin member.

[0023] The hiding rate of the transfer layer in the present disclosure is measured as follows. 1) Cut the location where the hiding rate of the transfer sheet is to be measured into a predetermined size. 2) Stick a tape on the upper end of the transfer surface of the cut transfer sheet, and peel the transfer layer from the release film. Then, remove the tape to obtain a single layer of the transfer layer. 3) Stack the single layer of the transfer layer on a hiding rate test paper compliant with JIS K 5600-4-1, measure the tristimulus values YW and YB with a spectrocolorimeter (Spectrophotometer CM-3700A manufactured by Konica Minolta), and calculate the hiding rate YB / YW as a percentage.

[0024] The ratio of the low hiding region to the plan view area of the transfer layer varies depending on the coloring degree of the pattern layer and the pattern of the pattern layer. For example, it may be 5% or more, may be 10% or more, may be 15% or more, or may be 30% or more. On the other hand, the ratio of the low hiding region to the plan view area of the transfer layer may be, for example, 100% or less, may be 95% or less, may be 90% or less, or may be 80% or less. Also, the hiding rate in the low hiding region may be 40% or less, or may be 35% or less.

[0025] (2) Visible light transmittance In the low concealment region, the visible light transmittance is usually 40% or more, may be 45% or more, or may be 50% or more. If the visible light transmittance of the transfer layer is within the above range, it is possible to achieve a design expression that takes advantage of the transmissive visibility of the transparent resin member. The above visible light transmittance refers to the average transmittance in the visible light region (the region with a wavelength of 380 nm or more and 780 nm or less).

[0026] Also, when the concealment rate in the low concealment region is 40% or less, the visible light transmittance in the low concealment region may be, for example, 45% or more, or may be 50% or more.

[0027] (3) Ultraviolet light transmittance In the low concealment region, the ultraviolet light transmittance is usually 1% or less, may be 0.5% or less, may be 0.2% or less, or may be 0.1% or less. If the ultraviolet light transmittance of the transfer layer is within the above range, it will have excellent weather resistance. The above ultraviolet light transmittance refers to the average transmittance in the ultraviolet light region (the region with a wavelength of 280 nm or more and 350 nm or less).

[0028] Also, when the concealment rate in the low concealment region is 40% or less, the ultraviolet light transmittance in the low concealment region may be, for example, 1% or less, may be 0.5% or less, may be 0.2% or less, or may be 0.1% or less.

[0029] In the present disclosure, the ultraviolet light transmittance in the region where the concealment rate of the transfer layer is greater than 50% may be 1% or less, may be 0.5% or less, may be 0.2% or less, or may be 0.1% or less. That is, the transfer layer may have an ultraviolet light transmittance of 1% or less, may be 0.5% or less, may be 0.2% or less, or may be 0.1% or less in the entire region in plan view. Also, the visible light transmittance in the region where the concealment rate of the transfer layer in the present disclosure is greater than 50% varies depending on the coloring degree of the pattern layer, etc., but for example, it may be less than 40% and may be 20% or less.

[0030] In the present disclosure, it is not necessary for the visible light transmittance and the ultraviolet transmittance to be within the above ranges throughout the entire low concealment region. It is sufficient that the visible light transmittance and the ultraviolet transmittance measured at the same location as the location where the concealment rate is measured to be at least 50% or less are below the above values. On the other hand, the ratio of the area where the visible light transmittance and the ultraviolet transmittance are within the above ranges to the total area of the low concealment region may be 10% or more, may be 20% or more, or may be 30% or more. On the other hand, the ratio of the area where the visible light transmittance and the ultraviolet transmittance are within the above ranges to the total area of the low concealment region may be 100% or less, may be 90% or less, or may be 80% or less.

[0031] (4) Thickness The thickness of the transfer layer (the total thickness of each layer constituting the transfer layer) is, for example, 5 μm or more, may be 10 μm or more, may be 12 μm or more, or may be 14 μm or more. If the transfer layer is thin, sufficient weather resistance may not be obtained. On the other hand, the thickness of the transfer layer is preferably 30 μm or less, may be 28 μm or less, may be 25 μm or less, or may be 20 μm or less. If the transfer layer is thick, it may be difficult to utilize the transmissive visibility of the transparent resin member. In addition, if the transfer layer is thick, swelling may occur during outgas generation.

[0032] (5) Layer structure The transfer layer in the present disclosure may have only the first protective layer, the second protective layer, and the pattern layer, or may include other layers.

[0033] (i) First protective layer The transfer sheet in the present disclosure has a first protective layer. By including a weathering agent, the first protective layer contributes to improving weather resistance. Furthermore, the first protective layer also contributes to improving the surface characteristics (e.g., scratch resistance and stain resistance) of the exterior member. In addition, in order to improve the surface characteristics of the exterior member, if the hardness of the first protective layer is increased, the adhesion between the first protective layer and the pattern layer is likely to decrease. The first protective layer and the release film may be arranged so as to be in direct contact, or may be arranged via other layers.

[0034] The first protective layer preferably contains, as a resin component, a cured product (crosslinked structure) of a curable resin composition. 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 with respect to all the resin components constituting the first protective layer.

[0035] Examples of the cured product of the curable resin composition include cured products of radiation-curable resin compositions. Examples of the radiation-curable resin composition include electron beam-curable resin compositions and ultraviolet-curable resin compositions. Among these, an electron beam-curable resin composition is preferable because it has less odor and is less likely to cause coloring since a polymerization initiator is not required.

[0036] A radiation-curable resin composition is a composition containing a compound having a radiation-curable functional group (hereinafter also referred to as a "radiation-curable compound"). The radiation-curable functional group is a group that crosslinks and cures upon irradiation with radiation, and examples thereof include functional groups having an ethylenic double bond such as a (meth)acryloyl group, a vinyl group, and an allyl group. In the present disclosure, the (meth)acryloyl group means an acryloyl group or a methacryloyl group. Also, in the present disclosure, (meth)acrylate means acrylate or methacrylate.

[0037] Radiation refers to those having energy quanta capable of polymerizing or crosslinking molecules among electromagnetic waves or charged particle beams. Examples of radiation include electron beam (EB) and ultraviolet ray (UV). Other examples of radiation include electromagnetic waves such as X-rays and γ-rays, and charged particle beams such as α-rays and ion beams.

[0038] The radiation-curable compound preferably contains at least one selected from, for example, urethane (meth)acrylate, epoxy (meth)acrylate, polyester (meth)acrylate, polyether (meth)acrylate, polycarbonate (meth)acrylate, and acrylic (meth)acrylate. Among them, the 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 is easy to improve the weather resistance and scratch resistance of the first protective layer.

[0039] Further, the radiation-curable compound may contain a caprolactone-based urethane acrylate and a urethane (meth)acrylate that is not caprolactone-modified. In this case, the content of the caprolactone-based urethane acrylate contained in the first protective layer is defined as M CLUA and the content of the urethane (meth)acrylate that is not caprolactone-modified is defined as M UA . M UA and M CLUA . The mass ratio of M CLUA to the total of M CLUA and M UA and M CLUA ), for example, is 40% by mass or more and 90% by mass or less, may be 45% by mass or more and 80% by mass or less, or may be 50% by mass or more and 70% by mass or less.

[0040] The caprolactone-based urethane acrylate can usually be obtained by the reaction of a caprolactone-based polyol, an organic isocyanate, and a hydroxy (meth)acrylate. Examples of the synthesis method include a method in which a polycaprolactone-based polyol and an organic polyisocyanate are reacted to produce a polyurethane prepolymer containing -NCO groups (isocyanate groups) at both ends, and then reacted with a hydroxy (meth)acrylate.

[0041] As the caprolactone-based polyol, commercially available ones can be used. Preferably, it has two hydroxyl groups, and the number average molecular weight is preferably 500 to 3000, more preferably 750 to 2000. Also, polyols other than caprolactone-based polyols, such as ethylene glycol, diethylene glycol, 1,4-butanediol, 1,6-hexanediol and other polyols, can be used by mixing one or more kinds in any ratio. As the organic polyisocyanate, diisocyanate having two isocyanate groups is preferable. From the viewpoint of suppressing yellowing, isophorone diisocyanate, hexamethylene diisocyanate, 4,4'-dicyclohexylmethane diisocyanate, trimethylhexamethylene diisocyanate and the like are preferably mentioned. As the hydroxy(meth)acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, caprolactone-modified 2-hydroxyethyl acrylate and the like are preferably mentioned.

[0042] When the radiation-curable resin composition contains a caprolactone-based polyol, the caprolactone-based urethane acrylate is preferably a caprolactone diol-based urethane acrylate. The caprolactone diol-based urethane acrylate refers to a urethane acrylate in which the terminal of the caprolactone-based urethane acrylate is diethylene glycol. By using the caprolactone diol-based urethane acrylate, it is possible to suppress the occurrence of cracks and whitening in the first protective layer.

[0043] The number average molecular weight of the radiation-curable compound is, for example, 300 or more and 10000 or less, may be 1000 or more and 10000 or less, or may be 2000 or more and 10000 or less. The number average molecular weight is measured by GPC analysis and is the average molecular weight converted with standard polystyrene.

[0044] For example, when the radiation-curable compound is an ultraviolet-curable compound, the radiation-curable compound preferably contains at least one of a photoinitiator and a photopolymerization accelerator. Examples of the photoinitiator include acetophenone, benzophenone, α-hydroxyalkylphenone, Michler's ketone, benzoin, benzyldimethyl ketal, benzoyl benzoate, α-acyl oxime ester, acylphosphine oxide, and thioxanthones. Examples of the photopolymerization accelerator include isoamyl p-dimethylaminobenzoate and ethyl p-dimethylaminobenzoate.

[0045] The first protective layer contains a weathering agent. Examples of the weathering agent include an ultraviolet absorber and a light stabilizer. The first protective layer preferably contains at least one of an ultraviolet absorber and a light stabilizer. The first protective layer may contain one or more kinds of ultraviolet absorbers. Similarly, the first protective layer may contain one or more kinds of light stabilizers.

[0046] Examples of the ultraviolet absorber contained in the first protective layer 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, cyano (meth) acrylate-based ultraviolet absorbers, and inorganic ultraviolet absorbers such as titanium dioxide, cerium oxide, and zinc oxide. Among these, triazine-based ultraviolet absorbers are more preferable.

[0047] Examples of triazine-based ultraviolet absorbers include hydroxyphenyltriazine-based ultraviolet absorbers. Examples of hydroxyphenyltriazine-based ultraviolet 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, 2,4-bis[2-hydroxy-4-butoxyphenyl]-6-(2,4-dibutoxyphenyl)-1,3,5-triazine, 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, 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5[2-(2-ethylhexanoyloxy)ethoxy]phenol.

[0048] The content of the ultraviolet absorber contained in the first protective layer is, for example, 0.5 parts by mass or more and 10 parts by mass or less, may be 0.8 parts by mass or more and 8 parts by mass or less, or may be 1 part by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the radiation curable compound. If the content of the ultraviolet absorber is large, there is a possibility that bleed-out of the ultraviolet absorber may occur. If the content of the ultraviolet absorber is small, sufficient ultraviolet absorption performance may not be obtained.

[0049] Examples of the light stabilizer contained in the first protective layer include hindered amine light stabilizers. Examples of hindered amine 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-tetramethylpiperidin-4-yl)amino]-6-(2-hydroxyethylamino)-1,3,5-triazine).

[0050] The content of the light stabilizer contained in the first protective layer is, for example, 1 part by mass or more and 10 parts by mass or less, may be 1.5 parts by mass or more and 8 parts by mass or less, or may be 2 parts by mass or more and 5 parts by mass or less with respect to 100 parts by mass of the radiation curable compound. If the content of the light stabilizer is large, bleeding out of the light stabilizer may occur, and if the content of the light stabilizer is small, sufficient light stability may not be obtained.

[0051] The first protective layer may contain additives such as silicone compounds, polymerization inhibitors, crosslinking agents, antistatic agents, adhesion improvers, antioxidants, leveling agents, thixotropy imparting agents, coupling agents, plasticizers, antifouling agents, and defoaming agents. The first protective layer may or may not contain a filler. Examples of the filler include organic fillers and inorganic fillers. Examples of the inorganic filler include silica. Further, by not containing a filler in the first protective layer, a decrease in transparency is suppressed. As a result, a decrease in design property is suppressed.

[0052] Further, the thickness of the first protective layer is, for example, 2 μm or more, and may be 3 μm or more, or may be 4 μm or more. If the first protective layer is thin, sufficient weather resistance may not be obtained. On the other hand, the thickness of the first protective layer is, for example, 20 μm or less, and may be 15 μm or less, or may be 10 μm or less. If the first protective layer is thick, the hardness of the first protective layer increases, the followability of the first protective layer with respect to the second protective layer decreases, cracks are likely to occur in the first protective layer, and good weather resistance adhesion may not be obtained.

[0053] (ii) Second protective layer The transfer sheet in the present disclosure has a second protective layer. By containing a weathering agent, the second protective layer contributes to improving weather resistance and also contributes to improving adhesion with the pattern layer. The second protective layer and the first protective layer may be arranged so as to be in direct contact, or may be arranged via another layer.

[0054] The second protective layer contains a resin. Examples of the resin include (meth)acrylic resins, urethane resins, butyral resins, polyolefins, chlorinated polyolefins, vinyl chloride-vinyl acetate copolymers, and polyesters. Among these, urethane resins are preferred. The second protective layer preferably contains a cured product (crosslinked structure) of the above resin.

[0055] The second protective layer preferably contains a cured product of a curable resin composition (particularly, a cured product of a thermosetting resin composition). A thermosetting resin composition is a composition containing at least a thermosetting resin and is a resin composition that cures by heating. Examples of the thermosetting resin include (meth)acrylic resins, urethane resins, urethane acrylic resins, phenolic resins, urea melamine resins, epoxy resins, unsaturated polyester resins, and silicone resins. Further, the thermosetting resin composition may be obtained by adding a curing agent such as an isocyanate-based curing agent or an epoxy-based curing agent to these resins.

[0056] The cured product of the thermosetting resin composition is preferably the cured product of a thermosetting resin composition containing a (meth)acrylic resin, a urethane resin, or a urethane acrylic resin, and more preferably the cured product of a thermosetting resin composition containing a urethane acrylic resin. Further, in order to make the structure of the cured product more rigid, the thermosetting resin composition preferably contains an isocyanate-based curing agent or an epoxy-based curing agent, and more preferably contains an isocyanate-based curing agent. Among them, from the viewpoint of suppressing yellowing, an HDI (hexamethylene diisocyanate)-based curing agent is preferable.

[0057] Also, when the second protective 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 radically polymerizing an acrylic monomer with a polycarbonate-based polyurethane polymer obtained by reacting a polycarbonate diol with a (di)isocyanate.

[0058] Examples of the (di)isocyanate include aromatic isocyanates such as 4,4'-diphenylmethane diisocyanate, 2,4-tolylene diisocyanate, 1,5-naphthalene diisocyanate, n-isocyanatophenylsulfonyl isocyanate, o-isocyanatophenylsulfonyl isocyanate, and p-isocyanatophenylsulfonyl isocyanate; aliphatic isocyanates such as 1,6-hexamethylene diisocyanate; and alicyclic isocyanates such as isophorone diisocyanate, hydrogenated xylylene diisocyanate, and hydrogenated diphenylmethane diisocyanate.

[0059] Examples of the acrylic monomer include (meth)acrylic acid alkyl esters 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.

[0060] In the polycarbonate-based urethane acrylate copolymer, the mass ratio of the urethane component to the total of the acrylic component and the urethane component ([urethane component] / ([acrylic component]+[urethane component])) is, for example, 70% by mass or more and 95% by mass or less, may be 75% by mass or more and 95% by mass or less, or may be 80% by mass or more and 90% by mass or less. By setting the above mass ratio to 70% by mass or more, the proportion of the polycarbonate structure in the polycarbonate-based urethane acrylate copolymer can be increased, so that the structure of the polycarbonate-based urethane acrylate copolymer becomes more rigid. Therefore, the deformation due to temperature change can be reduced. Also, by setting the above mass ratio to 95% by mass or less, it becomes easier to ensure the flexibility of the second protective layer, and the adhesion to the pattern layer is improved.

[0061] The second protective layer contains a weathering agent. Examples of the weathering agent include an ultraviolet absorber and a light stabilizer. The second protective layer preferably contains at least one of an ultraviolet absorber and a light stabilizer. The preferred types and embodiments of the weathering agent are the same as those described in the above “(i) First protective layer”, so the description here is omitted. In particular, the second protective layer preferably contains a triazine-based ultraviolet absorber. Also, the second protective layer preferably contains a hindered amine-based light stabilizer.

[0062] The content of the ultraviolet absorber contained in the second protective layer is, for example, 0.1 part by mass or more and 50 parts by mass or less, may be 3 parts by mass or more and 40 parts by mass or less, or may be 10 parts by mass or more and 35 parts by mass or less with respect to 100 parts by mass of the resin component. Also, the content of the ultraviolet absorber contained in the second protective layer (content with respect to 100 parts by mass of the resin component) may be more than the content of the ultraviolet absorber contained in the first protective layer (content with respect to 100 parts by mass of the resin component).

[0063] The content of the light stabilizer contained in the second protective layer is, for example, 0.1 part by mass or more and 15 parts by mass or less, may be 1 part by mass or more and 15 parts by mass or less, or may be 3 parts by mass or more and 10 parts by mass or less with respect to 100 parts by mass of the resin component. Further, the content of the light stabilizer contained in the second protective layer (content with respect to 100 parts by mass of the resin component) may be more than the content of the light stabilizer contained in the first protective layer (content with respect to 100 parts by mass of the resin component).

[0064] The second protective layer may contain additives such as silicone compounds, polymerization inhibitors, crosslinking agents, antistatic agents, adhesion improvers, antioxidants, leveling agents, thixotropic agents, coupling agents, plasticizers, antifouling agents, defoaming agents, fillers, etc. Further, the second protective layer may or may not contain a filler.

[0065] Further, the thickness of the second protective layer is, for example, 2 μm or more, and may be 3 μm or more. If the second protective layer is thin, the adhesion to the pattern layer may be insufficient. On the other hand, the thickness of the second protective layer is, for example, 10 μm or less, may be 8 μm or less, or may be 5 μm or less. If the second protective layer is thick, the movement of the second protective layer due to heat becomes large, cracks are likely to occur in the first protective layer, and good weather resistance adhesion may not be obtained.

[0066] (iii) Pattern layer The transfer sheet in the present disclosure has a pattern layer on the surface of the second protective layer opposite to the first protective layer. By providing the pattern layer, the design of the exterior member is improved. The pattern layer and the second protective layer may be arranged so as to be in direct contact, or may be arranged via other layers.

[0067] The pattern layer is a layer printed with ink. Examples of the pattern (pattern) in the pattern layer include wood grain pattern, stone grain pattern, sand grain pattern, tile sticker pattern, brick stack pattern, cloth pattern, leather grain pattern, geometric figure, character, symbol, abstract pattern, flower pattern, wave pattern, stripe pattern, metallic pattern, rusty pattern.

[0068] The pattern layer usually contains a colorant and a binder resin. Examples of the colorant include inorganic pigments such as carbon black (soot), iron black, titanium white, antimony white, lead yellow, titanium yellow, Indian yellow, cadmium red, ultramarine blue, cobalt blue, etc.; organic pigments (including dyes) such as quinacridone red, isoindolinone yellow, nickel azo complex, phthalocyanine blue, azomethine azo black, etc.; metal pigments such as aluminum, brass, etc.; and pearl pigments such as titanium dioxide-coated mica, basic lead carbonate, etc.

[0069] Examples of the binder resin 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.

[0070] The pattern layer may contain additives such as ultraviolet absorbers, light stabilizers, curing agents, plasticizers, catalysts, etc. as necessary. The thickness of the pattern layer is, for example, 0.5 μm or more and 20 μm or less, may be 1 μm or more and 10 μm or less, or may be 2 μm or more and 5 μm or less.

[0071] (iv) Adhesive layer In the transfer layer in the present disclosure, an adhesive layer may or may not be provided on the surface of the pattern layer on the side opposite to the second protective layer in the thickness direction. The adhesive layer is preferably a layer that contacts the transparent resin member in the layer constituting the transfer layer in the transfer sheet. In this case, the adhesive layer is arranged to improve the adhesion between the transfer layer and the transparent resin member. The adhesive layer may contain a component having adhesiveness. Examples of the component having adhesiveness include (meth)acrylic resins, vinyl chloride-vinyl acetate copolymer resins, vinyl acetate resins, ester resins, epoxy resins, imide resins, and rubber resins.

[0072] The subsequent layer may be a so-called adhesive layer. The adhesive layer has adhesiveness at normal temperature. Examples of the resin contained in the adhesive layer include (meth)acrylic resins, silicone resins, vinyl resins, ester resins, urethane resins, amide resins, epoxy resins, rubber resins, and ionomer resins.

[0073] Also, the adhesive layer may be a heat-sealing layer (heat weld layer). The heat-sealing layer exhibits adhesiveness upon heating. Examples of the resin contained in the heat-sealing layer include thermoplastic resins. Examples of the thermoplastic resins include (meth)acrylic resins, polyacrylic polyols, urethane resins, vinyl chloride resins, vinyl acetate resins, vinyl chloride-vinyl acetate copolymer resins, styrene-acrylic copolymer resins, acrylic-vinyl acetate copolymer resins, polyester resins, amide resins, cyanoacrylate resins, epoxy resins, etc. These can be used alone or in combination of multiple types.

[0074] The glass transition temperature (Tg) of the (meth)acrylic resin is not particularly limited, but for example, it is 90°C or higher and 150°C or lower, and may be 95°C or higher and 120°C or lower. Also, the glass transition temperature (Tg) of the vinyl chloride-vinyl acetate copolymer resin is not particularly limited, but for example, it is 50°C or higher and 85°C or lower, and may be 55°C or higher and 80°C or lower. When the heat-sealing layer contains a (meth)acrylic resin and a vinyl chloride-vinyl acetate copolymer resin, the proportion of the (meth)acrylic resin to the total of the (meth)acrylic resin and the vinyl chloride-vinyl acetate copolymer resin is, for example, 30% by mass or more and 70% by mass or less, and may be 40% by mass or more and 60% by mass or less.

[0075] The thickness of the adhesive layer is, for example, 0.5 μm or more and 10 μm or less, and may be 0.5 μm or more and 5 μm or less. When the thickness of the adhesive layer is within the above range, it is easy to improve the adhesion between the adhesive layer and the transparent resin member during the manufacture of the exterior member.

[0076] (v) Transfer layer In the present disclosure, the transfer layer preferably does not have a solid layer (a layer coated with solid ink). The solid layer functions as an undercoat layer and is, for example, an opaque color layer. By not having a solid layer, a low-concealment region can be easily obtained.

[0077] The above transfer layer preferably has a high moisture permeability measured in accordance with JIS Z 0208. This is because swelling during outgassing can be suppressed. The moisture permeability is, for example, 200 g / m 2 ·day or more, and may be 250 g / m 2 ·day or more, and may be 280 g / m 2 ·day or more. On the other hand, the moisture permeability is, for example, 400 g / m 2 ·day or less.

[0078] The above transfer layer preferably has a high oxygen permeability measured in accordance with JIS K 7126-2. This is because swelling during outgassing can be suppressed. The oxygen permeability is, for example, 1000 ml / (m 2 ·day·MPa) or more. On the other hand, the upper limit of the oxygen permeability is not particularly limited.

[0079] 2. Release film The transfer sheet in the present disclosure has a release film (first release film) on the surface of the first protective layer opposite to the second protective layer. The release film and the first protective layer may be arranged so as to be in direct contact, or may be arranged via other layers.

[0080] The release film is preferably a resin film. Examples of the resin contained in the resin film include ester resins, olefin resins, styrene resins, vinyl resins, (meth)acrylic resins, amide resins, imide resins, and carbonate resins.

[0081] The release film preferably contains an ester resin or an olefin resin. Examples of the ester resin include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene naphthalate (PEN), and polyethylene terephthalate-isophthalate copolymer. Among these, from the viewpoint that thermal shrinkage during the production of the transfer sheet and shrinkage due to irradiation with ionizing radiation are less likely to occur, PET or PBT is preferred, and PET is more preferred.

[0082] Examples of the olefin resin include polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, and ethylene-propylene-butene copolymer. Among these, from the viewpoint that thermal shrinkage during the production of the transfer sheet and shrinkage due to irradiation with ionizing radiation are less likely to occur, polypropylene is preferred.

[0083] Also, from the viewpoint of obtaining an exterior member with a release film having a design that makes use of the transmissive visibility of the transparent resin member, the release film preferably has a 60° gloss value of 25% or more. The above 60° gloss value may be 30% or more, or may be 35% or more. The 60° gloss value of the release film is a value measured by a method conforming to JIS Z8741:1997 using a gloss meter (micro-TRI-gloss gloss meter manufactured by BYK). Specifically, it is performed by turning the surface on the side opposite to the transfer surface of the release film upward and placing the gloss meter to read the gloss value at 60°. The 60° gloss value is, for example, the average value of the values measured at any 10 locations on the release film.

[0084] Also, the surface on the side opposite to the transfer layer of the release film preferably has an arithmetic mean surface roughness Sa of 0.5 μm or less. This is because an exterior member with a release film having a design that makes use of the transmissive visibility of the transparent resin member can be obtained. The above arithmetic mean surface roughness Sa may be 0.4 μm or less.

[0085] The arithmetic mean surface roughness Sa is an extension of Ra, a two-dimensional roughness parameter described in JIS B0601:1994, to three dimensions. When the orthogonal coordinate axes X and Y are placed on the reference plane, the roughness surface is Z(x,y), and the sizes of the reference plane are Lx and Ly, it is calculated by the following formula (i). In formula (i), A = Lx × Ly.

[0086] [Number]

[0087] The measurement of the arithmetic mean surface roughness Sa of the surface on the side opposite to the transfer layer of the release film is specifically carried out under the following measuring instruments and measurement conditions. · Measuring instrument 3D shape measuring instrument VK-X1000 manufactured by Keyence Corporation · Analysis software Analysis application of shape measurement laser microscope VK-X100 / X200 series · Measurement conditions 5x lens · Measurement area Width 500μm × length 500μm

[0088] The release film may be a stretched film or an unstretched film. The stretching ratio in the machine 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. Also, the thickness of the release film is, for example, 10μm or more and 200μm or less, may be 15μm or more and 150μm or less, or may be 20μm or more and 100μm or less.

[0089] 3. Transfer sheet The transfer sheet in the present disclosure has a release film and a transfer layer (at least, a first protective layer, a second protective layer, and a pattern layer) in this order in the thickness direction.

[0090] The transfer sheet in the present disclosure may have a second release film on the surface opposite to the release film of the transfer layer. For example, when the transfer sheet is manufactured by winding it into a roll shape, the occurrence of blocking can be suppressed. The second release film is usually peeled off from the transfer sheet before the lamination process described later. Details of the second release film are the same as those described for the first release film above, so the description here is omitted.

[0091] 4. Method for manufacturing a transfer sheet The method for manufacturing the transfer sheet in the present disclosure is not particularly limited. For example, a first protective layer is formed on the surface of the release film, and then a second protective layer is formed on the surface of the first protective layer opposite to the release film, and then a pattern layer is formed on the surface of the second protective layer opposite to the first protective layer.

[0092] As a method for forming the first protective layer, for example, a method of coating a composition for forming the first protective layer on the surface of the release film and curing it can be mentioned. Examples of the coating method of the above composition include a gravure printing method, a bar coating method, a roll coating method, a reverse roll coating method, and a comma coating method. Examples of the curing method include irradiating with ionizing radiation such as electron beams and ultraviolet rays.

[0093] As a method for forming the second protective layer, for example, a method of coating a composition for forming the second protective layer on the surface of the first protective layer opposite to the release film and curing it as necessary can be mentioned. Examples of the coating method of the above composition include a gravure printing method, a bar coating method, a roll coating method, a reverse roll coating method, and a comma coating method. Examples of the curing method include heat. Also, as a method for forming the pattern layer, for example, a method of coating ink containing a colorant, a binder resin, and a solvent on the surface of the second protective layer opposite to the first protective layer can be mentioned. Further, the transfer layer may have the adhesive layer described above. As a method for forming the adhesive layer, for example, a method of coating a composition for forming the adhesive layer on the surface of the pattern layer opposite to the second protective layer can be mentioned.

[0094] 5. Use The transfer sheet in the present disclosure is used for manufacturing an exterior member having a transparent resin member. By using the transfer sheet in the present disclosure and providing the above-described transfer layer on the transparent resin member by a transfer method, an exterior member having good weather resistance and further having a design that takes advantage of the transmissive visibility of the transparent resin member can be obtained.

[0095] B. Manufacturing Method of Exterior Member In the present disclosure, there is provided a method for manufacturing an exterior member having a transparent resin member, the method including a preparation step of preparing the above-described transfer sheet, and a lamination step of laminating the transfer sheet on the transparent resin member such that the surface of the transfer sheet on the pattern layer side faces the transparent resin member. The "surface of the transfer sheet on the pattern layer side" refers to the surface of the transfer sheet 10 located on the pattern layer 5 side when the release film 1 is used as a reference, as shown in FIG. 1 for example.

[0096] According to the present disclosure, by using the above-described transfer sheet, an exterior member having good weather resistance and further having a design that takes advantage of the transmissive visibility of the transparent resin member can be obtained.

[0097] FIG. 2 is a schematic cross-sectional view illustrating the manufacturing method of the exterior member in the present disclosure. Since FIG. 2 has been described in the above-mentioned "A. Transfer Sheet", the description here is omitted.

[0098] 1. Preparation Step The preparation step in the present disclosure is a step of preparing a transfer sheet having a release film, a first protective layer, a second protective layer, and a pattern layer in this order in the thickness direction. Since the transfer sheet is the same as the above-described "A. Transfer Sheet", the description here is omitted.

[0099] 2. Lamination Step The lamination step in the present disclosure is a step of laminating the transfer sheet on the transparent resin member such that the surface of the transfer sheet on the pattern layer side faces the transparent resin member.

[0100] (1) Transparent Resin Member The transparent resin member in the present disclosure contains resin. Examples of the resin contained in the transparent resin member include polycarbonate resins, (meth)acrylic resins, polyolefin resins, polyester resins, acrylonitrile-butadiene-styrene resins (ABS resins), vinyl chloride resins, and polyimide resins.

[0101] The visible light transmittance of the transparent resin member is, for example, 70% or more, may be 80% or more, or may be 90% or more. If the visible light transmittance of the transparent resin member is low, it may be difficult to achieve a design expression that takes advantage of the transmissive visibility. The method for measuring the visible light transmittance is the same as the above-described content. On the other hand, the ultraviolet transmittance of the transparent resin member is, for example, 10% or less, may be 8% or less, or may be 6% or less. The method for measuring the ultraviolet transmittance is the same as the above-described content. The transparent resin member may be colorless and transparent or colored and transparent.

[0102] The shape of the transparent resin member is not particularly limited, and examples include a plate shape, a sheet shape, and a three-dimensional shape. Further, the transparent resin member may have a flat surface portion, a curved surface portion, or both a flat surface portion and a curved surface portion. Further, the transparent resin member may have at least one of a convex portion, a concave portion, a convex rib portion, a concave rib portion, and a through portion.

[0103] (2) Laminating method In the lamination step, the transfer sheet is laminated on the transparent resin member such that the surface of the transfer sheet on the pattern layer side faces the transparent resin member. For example, when the transfer sheet has the adhesive layer described above, it is preferable to laminate the transfer sheet on the transparent resin member by adhering the adhesive layer in the transfer sheet to the transparent resin member.

[0104] For example, when the transfer sheet does not have the adhesive layer described above, the transfer sheet and the transparent resin member may be laminated via an adhesive layer. Specifically, the transfer sheet may be laminated on the transparent resin member via an adhesive layer such that the surface of the transfer sheet on the pattern layer side faces the transparent resin member.

[0105] The adhesive layer is disposed between the surface of the transfer sheet on the pattern layer side and the transparent resin member in order to obtain adhesiveness between the transfer sheet and the transparent resin member. In order to obtain a design that takes advantage of the transparency visibility of the transparent resin member, the adhesive layer is preferably transparent.

[0106] The adhesive used for the adhesive layer is not particularly limited, and known adhesives can be used. For example, adhesives such as heat-sensitive adhesives and pressure-sensitive adhesives are preferably mentioned. Examples of the resin used for the adhesive constituting this adhesive layer include acrylic resins, polyurethane resins, vinyl chloride resins, vinyl acetate resins, vinyl chloride-vinyl acetate copolymer resins, styrene-acrylic copolymer resins, polyester resins, polyamide resins, etc. These can be used alone or in combination of multiple types. In addition, two-component curable polyurethane adhesives and polyester adhesives using isocyanate compounds or the like as curing agents can also be applied. In addition, an adhesive can also be used for the adhesive layer. As the adhesive, various adhesives such as acrylic, urethane, silicone, and rubber can be appropriately selected and used. The thickness of the adhesive layer is not particularly limited, but for example, it is 0.5 μm or more and 5 μm or less.

[0107] Examples of the method for bringing the transfer sheet and the transparent resin member into close contact include a laminating method. In the laminating method, for example, a laminate having a transfer sheet and a transparent resin member is heated and pressurized from the transfer sheet side. Examples of the heating and pressurizing method include a method using a roll transfer device. The temperature during heating and the pressure during pressurization are appropriately selected so that the transfer sheet and the transparent resin member adhere well.

[0108] In addition, the method for manufacturing the exterior member in the present disclosure may have a peeling step of peeling the release film from the first protective layer after the laminating step.

[0109] 3. Exterior member The exterior member manufactured in the present disclosure has a first protective layer, a second protective layer, a pattern layer, and a transparent resin member in this order. The exterior member may be an exterior member with a release film having a release film on the surface of the first protective layer opposite to the second protective layer, or may be an exterior member without a release film.

[0110] The exterior member manufactured in the present disclosure has good weather resistance, and further becomes an exterior member having a design that takes advantage of the transmissive visibility of the transparent resin member. Examples of the use of the exterior member include building materials. Specific examples of building materials include exterior members such as eaves, outer walls, and roofs of buildings such as houses, carports, factories, stores, and hospitals. Further, the exterior member can also be used as an outdoor fence or an outdoor partition.

[0111] The present disclosure is not limited to the above embodiments. The above embodiments are examples, and any configuration that has substantially the same configuration as the technical idea described in the claims of the present disclosure and exhibits the same operational effects is included in the technical scope of the present disclosure.

Example

[0112] [Example 1] (Preparation of transfer sheet) As the release film, a PET film (Diafoil E130-26, manufactured by Mitsubishi Chemical Corporation) was prepared. The 60° gloss value of the surface opposite to the surface on which the transfer layer of the release film was disposed was 27%, and the arithmetic mean surface roughness Sa was 0.3 μm. The following resin composition for forming the first protective layer was applied to the surface of the PET film so that the coating amount after drying was 5 g / m 2 and dried. Then, an electron beam (applied voltage: 175 kV, 5 Mrad (50 kGy)) was irradiated to form a first protective layer having a thickness of 5 μm. <Resin composition for forming the first protective layer> · Urethane acrylate: 100 parts by mass (Bifunctional caprolactone-modified urethane acrylate / polyfunctional urethane acrylate = 50 / 50 (mass ratio)) · Triazine-based ultraviolet absorber: 4 parts by mass (3 parts by mass of "Tinuvin 479" (manufactured by BASF), 1 part by mass of "Tinuvin 400" (manufactured by BASF)) · Light stabilizer: 3 parts by mass (Product name: LS-3410, manufactured by Nippon Emulsion Co., Ltd.) · Solvent: appropriate amount (Methyl ethyl ketone)

[0113] Next, the following resin composition for forming the second protective layer was applied to the surface of the obtained first protective layer, dried, and a second protective layer with a thickness of 2 μm was formed. <Resin composition for forming the second protective layer> · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass (Urethane component / acrylic component = 90 / 10 (mass ratio)) · Triazine-based ultraviolet absorber: 35 parts by mass (18 parts by mass of "Tinuvin 479" (manufactured by BASF), 17 parts by mass of "Tinuvin 400" (manufactured by BASF)) · Light stabilizer: 3.5 parts by mass (“Tinuvin 123” (manufactured by BASF)) · Hexamethylene diisocyanate-based curing agent: 6 parts by mass · Solvent: appropriate amount (Methyl ethyl ketone)

[0114] Next, using a gravure printing machine, a pattern layer (abstract pattern A) with a thickness of 2 μm was formed on the surface of the obtained second protective layer. Abstract pattern A is a pattern including a yellowish-brown colored part, a blue-green colored part, and a purple colored part. Further, the following resin composition for forming the heat-sealing layer was applied to the surface of the obtained pattern layer, dried, and a heat-sealing layer with a thickness of 1 μm was formed. <Resin composition for forming the heat-sealing layer> · Mixture of vinyl chloride-vinyl acetate copolymer (Tg: about 65 °C) / acrylic resin (Tg: about 100 °C): 100 parts by mass (Vinyl chloride-vinyl acetate component / acrylic component = 50 / 50 (mass ratio)) · Solvent: appropriate amount (Methyl ethyl ketone)

[0115] Thus, a transfer sheet having a release film, a first protective layer, a second protective layer, a pattern layer, and a heat-sealing layer in this order in the thickness direction was obtained. The first protective layer, the second protective layer, the pattern layer, and the heat-sealing layer serve as a transfer layer. The thickness of the transfer layer was 10 μm.

[0116] (Fabrication of Exterior Member) The heat-sealing layer in the transfer sheet obtained above and a transparent resin member (acrylic member, thickness 2 mm, visible light transmittance 92.9%, ultraviolet light transmittance 6.2%) were arranged so as to face each other, and using a laminator (RT-300 manufactured by Navitus Machinery), heating and pressurization were performed from the transfer sheet side under the conditions of a laminating roll temperature of 180°C and a conveyance speed of 2 m / min to adhere the transfer sheet and the transparent resin member. Then, the release film was peeled off to obtain an exterior member.

[0117] [Example 2] (Fabrication of Transfer Sheet) As the release film, a PET film (Diafoil E130-26, manufactured by Mitsubishi Chemical) was prepared. The 60° gloss value of the surface on the side opposite to the side where the transfer layer of the release film was disposed was 27%, and the arithmetic mean surface roughness Sa was 0.3 μm. Onto the surface of the PET film, the following resin composition for forming a first protective layer was applied so that the coating amount after drying was 5 g / m 2 and dried. Then, an electron beam (applied voltage: 175 kV, 5 Mrad (50 kGy)) was irradiated to form a first protective layer with a thickness of 5 μm. [Resin Composition for Forming First Protective Layer]< · Urethane acrylate: 100 parts by mass (Bifunctional caprolactone-modified urethane acrylate / polyfunctional urethane acrylate = 50 / 50 (mass ratio)) · Triazine-based ultraviolet absorber: 4 parts by mass ("Tinuvin 479" (manufactured by BASF) 3 parts by mass, "Tinuvin 400" (manufactured by BASF) 1 part by mass) · Light stabilizer: 3 parts by mass (Product name: LS-3410, manufactured by Nippon Emulsion Co., Ltd.) · Solvent: appropriate amount (Methyl ethyl ketone)

[0118] Next, the following resin composition for forming the second protective layer was applied to the surface of the obtained first protective layer and dried to form a second protective layer with a thickness of 2 μm. <Resin composition for forming the second protective layer> · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass (Urethane component / Acrylic component = 90 / 10 (mass ratio)) · Triazine-based ultraviolet absorber: 35 parts by mass (18 parts by mass of "Tinuvin 479" (manufactured by BASF), 17 parts by mass of "Tinuvin 400" (manufactured by BASF)) · Light stabilizer: 3.5 parts by mass (「Tinuvin 123」(manufactured by BASF)) · Hexamethylene diisocyanate-based curing agent: 6 parts by mass · Solvent: appropriate amount (Methyl ethyl ketone)

[0119] Next, using a gravure printing machine, a pattern layer (abstract pattern B) with a thickness of 2 μm was formed on the surface of the obtained second protective layer. The abstract pattern B is a pattern including a dark gray-colored portion and a white-colored portion. Further, the following resin composition for forming a heat-sealing layer was applied to the surface of the obtained pattern layer and dried to form a heat-sealing layer with a thickness of 1 μm. <Resin composition for forming the heat-sealing layer> · Mixture of vinyl chloride-vinyl acetate copolymer (Tg: about 65 °C) / acrylic resin (Tg: about 100 °C): 100 parts by mass (Vinyl chloride-vinyl acetate component / Acrylic component = 50 / 50 (mass ratio)) · Solvent: appropriate amount (Methyl ethyl ketone)

[0120] Thereby, a transfer sheet having a release film, a first protective layer, a second protective layer, a pattern layer, and a heat-sealing layer in this order in the thickness direction was obtained. The first protective layer, the second protective layer, the pattern layer, and the heat-sealing layer serve as a transfer layer. The thickness of the transfer layer was 10 μm.

[0121] (Production of exterior member) The heat-sealing layer on the transfer sheet obtained above and the transparent resin member (acrylic member, thickness 2 mm, visible light transmittance 92.9%, ultraviolet light transmittance 6.2%) were arranged to face each other, and using a laminator (RT-300 manufactured by Navi Machinery), heating and pressurization were performed from the transfer sheet side under the conditions of a laminating roll temperature of 180 °C and a conveyance speed of 2 m / min to adhere the transfer sheet and the transparent resin member. Thereafter, the release film was peeled off to obtain an exterior member.

[0122] [Example 3] (Production of transfer sheet) As a release film, a PET film (Diafoil E130-26, manufactured by Mitsubishi Chemical) was prepared. The 60° gloss value of the surface on the side opposite to the side where the transfer layer of the release film was arranged was 27%, and the arithmetic mean surface roughness Sa was 0.3 μm. On the surface of the PET film, the following resin composition for forming a first protective layer was applied so that the coating amount after drying was 5 g / m 2 and dried. Thereafter, electron beam (applied voltage: 175 kV, 5 Mrad (50 kGy)) was irradiated to form a first protective layer with a thickness of 5 μm. [Resin composition for forming a first protective layer] · Urethane acrylate: 100 parts by mass (Bifunctional caprolactone-modified urethane acrylate / polyfunctional urethane acrylate = 50 / 50 (mass ratio)) · Triazine-based ultraviolet absorber: 4 parts by mass ("Tinuvin 479" (manufactured by BASF) 3 parts by mass, "Tinuvin 400" (manufactured by BASF) 1 part by mass) · Light stabilizer: 3 parts by mass (Product name: LS-3410, manufactured by Nippon Emulsion Co., Ltd.) · Solvent: appropriate amount (Methyl ethyl ketone)

[0123] Next, the following resin composition for forming a second protective layer was applied to the surface of the obtained first protective layer, dried, and a second protective layer with a thickness of 2 μm was formed. [Resin composition for forming a second protective layer] · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass (urethane component / acrylic component = 90 / 10 (mass ratio)) · Triazine-based ultraviolet absorber: 35 parts by mass (18 parts by mass of "Tinuvin 479" (manufactured by BASF), 17 parts by mass of "Tinuvin 400" (manufactured by BASF)) · Light stabilizer: 3.5 parts by mass ( "Tinuvin 123" (manufactured by BASF)) · Hexamethylene diisocyanate-based curing agent: 6 parts by mass · Solvent: appropriate amount (methyl ethyl ketone)

[0124] Next, on the surface of the obtained second protective layer, a pattern layer (wood grain pattern A) with a thickness of 2 μm was formed using a gravure printing machine. Wood grain pattern A is a pattern including a black colored part and a brown colored part. Further, on the surface of the obtained pattern layer, the following resin composition for forming a heat-sealing layer was applied and dried to form a heat-sealing layer with a thickness of 1 μm. <Resin composition for forming a heat-sealing layer> · Mixture of vinyl chloride-vinyl acetate copolymer (Tg: about 65 °C) / acrylic resin (Tg: about 100 °C): 100 parts by mass (vinyl chloride-vinyl acetate component / acrylic component = 50 / 50 (mass ratio)) · Solvent: appropriate amount (methyl ethyl ketone)

[0125] Thereby, a transfer sheet having a release film, a first protective layer, a second protective layer, a pattern layer, and a heat-sealing layer in this order in the thickness direction was obtained. The first protective layer, the second protective layer, the pattern layer, and the heat-sealing layer serve as a transfer layer. The thickness of the transfer layer was 10 μm.

[0126] (Fabrication of exterior member) The heat-sealing layer in the transfer sheet obtained above was arranged so as to face a transparent resin member (acrylic member, thickness 2 mm, visible light transmittance 92.9%, ultraviolet light transmittance 6.2%). Using a laminator (RT-300 manufactured by Navitus Machinery), heating and pressing were performed from the transfer sheet side under the conditions of a laminating roll temperature of 180 °C and a conveyance speed of 2 m / min to adhere the transfer sheet and the transparent resin member. Thereafter, the release film was peeled off to obtain an exterior member.

[0127] [Example 4] (Production of transfer sheet) As a release film, a PET film (Diafoil E130-26, manufactured by Mitsubishi Chemical) was prepared. The 60° gloss value of the surface on the side opposite to the side where the transfer layer of the release film was arranged was 27%, and the arithmetic mean surface roughness Sa was 0.3 μm. Onto the surface of the PET film, the following resin composition for forming a first protective layer was applied so that the coating amount after drying was 18 g / m 2 and dried. Thereafter, electron beam (applied voltage: 175 kV, 5 Mrad (50 kGy)) was irradiated to form a first protective layer with a thickness of 18 μm. [Resin composition for forming a first protective layer] · Urethane acrylate: 100 parts by mass (Bifunctional caprolactone-modified urethane acrylate / polyfunctional urethane acrylate = 50 / 50 (mass ratio)) · Triazine-based ultraviolet absorber: 4 parts by mass ("Tinuvin 479" (manufactured by BASF) 3 parts by mass, "Tinuvin 400" (manufactured by BASF) 1 part by mass) · Light stabilizer: 3 parts by mass (Product name: LS-3410, manufactured by Nippon Emulsion Co., Ltd.) · Solvent: appropriate amount (Methyl ethyl ketone)

[0128] Next, the following resin composition for forming a second protective layer was applied to the surface of the obtained first protective layer, dried, and a second protective layer with a thickness of 7 μm was formed. [Resin composition for forming a second protective layer] · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass (urethane component / acrylic component = 90 / 10 (mass ratio)) · Triazine-based ultraviolet absorber: 35 parts by mass ("Tinuvin 479" (manufactured by BASF) 18 parts by mass, "Tinuvin 400" (manufactured by BASF) 17 parts by mass) · Light stabilizer: 3.5 parts by mass ("Tinuvin 123" (manufactured by BASF)) · Hexamethylene diisocyanate-based curing agent: 6 parts by mass · Solvent: appropriate amount (methyl ethyl ketone)

[0129] Next, on the surface of the obtained second protective layer, a pattern layer (abstract pattern A) with a thickness of 2 μm was formed using a gravure printing machine. Abstract pattern A is a pattern including a yellowish-brown colored part, a blue-green colored part, and a purple-colored part. Further, on the surface of the obtained pattern layer, the following resin composition for forming a heat-sealing layer was applied and dried to form a heat-sealing layer with a thickness of 1 μm. (Resin composition for forming a heat-sealing layer) · Mixture of vinyl chloride-vinyl acetate copolymer (Tg: about 65 °C) / acrylic resin (Tg: about 100 °C): 100 parts by mass (vinyl chloride-vinyl acetate component / acrylic component = 50 / 50 (mass ratio)) · Solvent: appropriate amount (methyl ethyl ketone)

[0130] Thereby, a transfer sheet having a release film, a first protective layer, a second protective layer, a pattern layer, and a heat-sealing layer in this order in the thickness direction was obtained. The first protective layer, the second protective layer, the pattern layer, and the heat-sealing layer serve as a transfer layer. The thickness of the transfer layer was 28 μm.

[0131] (Fabrication of exterior member) The heat-sealing layer in the transfer sheet obtained above was arranged so as to face a transparent resin member (acrylic member, thickness 2 mm, visible light transmittance 92.9%, ultraviolet light transmittance 6.2%). Using a laminator (RT-300 manufactured by Navitus Machinery), heating and pressing were performed from the transfer sheet side under the conditions of a laminating roll temperature of 180°C and a conveyance speed of 2 m / min to adhere the transfer sheet and the transparent resin member. Thereafter, the release film was peeled off to obtain an exterior member.

[0132] [Example 5] (Production of Transfer Sheet) As the release film, a PET film (Diafoil E130-26, manufactured by Mitsubishi Chemical) was prepared. The 60° gloss value of the surface on the side opposite to the side where the transfer layer of the release film was disposed was 27%, and the arithmetic mean surface roughness Sa was 0.3 μm. On the surface of the PET film, the following resin composition for forming a first protective layer was applied so that the coating amount after drying was 5 g / m 2 and dried. Thereafter, electron beam (applied voltage: 175 kV, 5 Mrad (50 kGy)) was irradiated to form a first protective layer with a thickness of 5 μm. [Resin Composition for Forming First Protective Layer] ·Urethane acrylate: 100 parts by mass (Bifunctional caprolactone-modified urethane acrylate / polyfunctional urethane acrylate = 50 / 50 (mass ratio)) ·Triazine-based ultraviolet absorber: 4 parts by mass (3 parts by mass of "Tinuvin 479" (manufactured by BASF), 1 part by mass of "Tinuvin 400" (manufactured by BASF)) ·Light stabilizer: 3 parts by mass (Product name: LS-3410, manufactured by Nippon Emulsion Co., Ltd.) ·Solvent: appropriate amount (Methyl ethyl ketone)

[0133] Next, the following resin composition for forming a second protective layer was applied to the surface of the obtained first protective layer and dried to form a second protective layer with a thickness of 2 μm. [Resin Composition for Forming Second Protective Layer] ·Polycarbonate-based urethane acrylate copolymer: 100 parts by mass (urethane component / acrylic component = 90 / 10 (mass ratio)) · Triazine-based ultraviolet absorber: 35 parts by mass ("Tinuvin 479" (manufactured by BASF) 18 parts by mass, "Tinuvin 400" (manufactured by BASF) 17 parts by mass) · Light stabilizer: 3.5 parts by mass ("Tinuvin 123" (manufactured by BASF)) · Hexamethylene diisocyanate-based curing agent: 6 parts by mass · Solvent: appropriate amount (methyl ethyl ketone)

[0134] Next, on the surface of the obtained second protective layer, a pattern layer (abstract pattern A) with a thickness of 2 μm was formed using a gravure printing machine. The abstract pattern A is a pattern including a yellowish-brown colored part, a blue-green colored part, and a purple-colored part. Further, on the surface of the obtained pattern layer, the following resin composition for forming a heat-sealing layer was applied and dried to form a heat-sealing layer with a thickness of 1 μm. (Resin composition for forming a heat-sealing layer) · Mixture of vinyl chloride-vinyl acetate copolymer (Tg: about 65 °C) / acrylic resin (Tg: about 100 °C): 100 parts by mass (vinyl chloride-vinyl acetate component / acrylic component = 50 / 50 (mass ratio)) · Solvent: appropriate amount (methyl ethyl ketone)

[0135] Thereby, a transfer sheet having a release film, a first protective layer, a second protective layer, a pattern layer, and a heat-sealing layer in this order in the thickness direction was obtained. The first protective layer, the second protective layer, the pattern layer, and the heat-sealing layer serve as a transfer layer. The thickness of the transfer layer was 10 μm.

[0136] (Fabrication of exterior member) The heat-sealing layer in the transfer sheet obtained above was arranged to face a transparent resin member (polycarbonate member, thickness 2 mm, visible light transmittance 86.5%, ultraviolet light transmittance 0.25%). Using a laminator (RT-300 manufactured by Navitus Machinery), heating and pressing were performed from the transfer sheet side under the conditions of a lamination roll temperature of 180°C and a conveyance speed of 2 m / min to adhere the transfer sheet and the transparent resin member. Thereafter, the release film was peeled off to obtain an exterior member.

[0137] [Comparative Example 1] (Preparation of Transfer Sheet) As the release film, a PET film (Diafoil E130-26, manufactured by Mitsubishi Chemical) was prepared. The 60° gloss value of the surface on the side opposite to the side where the transfer layer of the release film was arranged was 27%, and the arithmetic mean surface roughness Sa was 0.3 μm. On the surface of the PET film, the following resin composition for forming a first protective layer was applied so that the coating amount after drying was 5 g / m 2 and dried. Thereafter, electron beam (applied voltage: 175 kV, 5 Mrad (50 kGy)) was irradiated to form a first protective layer with a thickness of 5 μm. [Resin Composition for Forming First Protective Layer] · Urethane acrylate: 100 parts by mass (Bifunctional caprolactone-modified urethane acrylate / polyfunctional urethane acrylate = 50 / 50 (mass ratio)) · Triazine-based ultraviolet absorber: 4 parts by mass (3 parts by mass of "Tinuvin 479" (manufactured by BASF), 1 part by mass of "Tinuvin 400" (manufactured by BASF)) · Light stabilizer: 3 parts by mass (Product name: LS-3410, manufactured by Nippon Emulsion Co., Ltd.) · Solvent: appropriate amount (Methyl ethyl ketone)

[0138] Next, the following resin composition for forming a second protective layer was applied to the surface of the obtained first protective layer and dried to form a second protective layer with a thickness of 2 μm. [Resin Composition for Forming Second Protective Layer] · Polycarbonate-based urethane acrylate copolymer: 100 parts by mass (urethane component / acrylic component = 90 / 10 (mass ratio)) · Triazine-based ultraviolet absorber: 35 parts by mass ("Tinuvin 479" (manufactured by BASF) 18 parts by mass, "Tinuvin 400" (manufactured by BASF) 17 parts by mass) · Light stabilizer: 3.5 parts by mass ("Tinuvin 123" (manufactured by BASF)) · Hexamethylene diisocyanate-based curing agent: 6 parts by mass · Solvent: appropriate amount (methyl ethyl ketone)

[0139] Next, on the surface of the obtained second protective layer, using a gravure printing machine, a pattern layer (wood grain pattern B) with a thickness of 2 μm and a solid layer (base concealment layer) with a thickness of 2 μm were formed. The wood grain pattern B is a pattern including a black colored portion and a brown colored portion. Further, on the surface of the obtained solid layer, the following resin composition for forming a heat-sealing layer was applied and dried to form a heat-sealing layer with a thickness of 1 μm. (Resin composition for forming a heat-sealing layer) · Mixture of vinyl chloride-vinyl acetate copolymer (Tg: about 65 °C) / acrylic resin (Tg: about 100 °C): 100 parts by mass (vinyl chloride-vinyl acetate component / acrylic component = 50 / 50 (mass ratio)) · Solvent: appropriate amount (methyl ethyl ketone)

[0140] Thereby, a transfer sheet having a release film, a first protective layer, a second protective layer, a pattern layer, a solid layer, and a heat-sealing layer in this order in the thickness direction was obtained. The first protective layer, the second protective layer, the pattern layer, the solid layer, and the heat-sealing layer serve as a transfer layer. The thickness of the transfer layer was 12 μm.

[0141] (Fabrication of exterior member) The heat-sealing layer in the transfer sheet obtained above was arranged so as to face a transparent resin member (acrylic member, thickness 2 mm, visible light transmittance 92.9%, ultraviolet light transmittance 6.2%). Using a laminator (RT-300 manufactured by Navitus Machinery), heating and pressing were performed from the transfer sheet side under the conditions of a laminating roll temperature of 180°C and a conveyance speed of 2 m / min to adhere the transfer sheet and the transparent resin member. Thereafter, the release film was peeled off to obtain an exterior member.

[0142] [Comparative Example 2] A commercially available window film having a wood grain pattern (CLEAS / Bronze Pearl Wood pattern manufactured by Sange Tsusho Co., Ltd. (product number: GF1865)) was prepared. The above window film had, in the thickness direction, a hard coat layer, a pattern layer, a PET film layer, an acrylic adhesive layer, and a release film, in this order. The thickness of the window film excluding the release film was 71 μm, and the thickness of the PET film layer constituting the window film was 50 μm.

[0143] The separator of the window film was peeled off, and the adhesive layer was arranged so as to face a transparent resin member (acrylic member, thickness 2 mm, visible light transmittance 92.9%, ultraviolet light transmittance 6.2%). Using a laminator (RT-300 manufactured by Navitus Machinery), pressing was performed from the window film side under the conditions of a laminating roll temperature of 30°C and a conveyance speed of 2 m / min to adhere the transfer sheet and the transparent resin member. Thereafter, the release film was peeled off to obtain an exterior member.

[0144] [Evaluation] The following evaluations were performed on the transfer sheets and exterior members obtained in each example and each comparative example.

[0145] (Measurement of hiding rate) The transfer layer of the obtained transfer sheet had different hiding rates depending on the measurement locations. Therefore, five measurement locations including the location where the hiding rate was estimated to be the largest and the location where the hiding rate was estimated to be the smallest were specified, and the hiding rate was measured by the following measurement method. The results are shown in Table 1.

[0146] ·Measurement method 1) The part where the hiding rate of the obtained transfer sheet was to be measured was cut into a predetermined size. 2) A tape was attached to the upper end of the transfer surface of the cut transfer sheet, and the transfer layer was peeled off from the release film. Then, the tape was removed to obtain a single transfer layer. 3) The single transfer layer was overlaid on a hiding rate test paper conforming to JIS K 5600-4-1, and the tristimulus values YW and YB were measured with a spectrophotometric color difference meter (CM-3700A manufactured by Konica Minolta), and the hiding rate YB / YW was calculated as a percentage.

[0147] In Comparative Example 2, the part where the hiding rate of the window film was to be measured was cut into a predetermined size. Then, the adhesive layer of the cut window film was overlaid on a hiding rate test paper conforming to JIS K 5600-4-1, and the tristimulus values YW and YB were measured with a spectrophotometric color difference meter (CM-3700A manufactured by Konica Minolta), and the hiding rate YB / YW was calculated as a percentage.

[0148] (Measurement of visible light transmittance and ultraviolet light transmittance) The visible light transmittance and ultraviolet light transmittance of the measurement part (region X) where the hiding rate was the minimum value in the above measurement of the hiding rate were measured. The measurement object was a single transfer layer from which the release film was peeled off, or a window film from which the release film was peeled off. Using an ultraviolet-visible-near-infrared spectrophotometer (U-4000 manufactured by Hitachi, Ltd.), the average transmittance in the visible light region (wavelength 380 nm or more and 780 nm or less) was defined as the visible light transmittance, and the average transmittance in the ultraviolet light region (wavelength 280 nm or more and 350 nm or less) was defined as the ultraviolet light transmittance. The results are shown in Table 1.

[0149] (Measurement of moisture permeability) The moisture permeability of the transfer layer of the obtained transfer sheet was measured. The measurement object was a single transfer layer from which the release film was peeled off, or a window film from which the release film was peeled off. In the cup method conforming to JIS Z 0208, it was carried out under humidity condition B (40 °C / 90%). The mass was measured 24 hours, 48 hours, 72 hours, and 96 hours after the start of the test, and the increased mass m per 24-hour unit was obtained, WVPR (g / m2 The moisture permeability was calculated from ·day) = 240 · m / t · s (m: increased mass, t: weighing interval time, s: moisture permeable area). The results are shown in Table 1.

[0150] (Measurement of oxygen permeability) The oxygen permeability of the transfer layer of the obtained transfer sheet was measured. The measurement target was the single transfer layer from which the release film was peeled off, or the window film from which the release film was peeled off. In accordance with JIS K 7126-2, the measurement was carried out by the electrolytic sensor method under humidity conditions (23°C / 50%). The permeabilities after 2 hours, 4 hours, 6 hours, and 8 hours from the start of the test were measured, and the oxygen permeability was determined from their average values.

[0151]

Table 1

[0152] As shown in Table 1, it was confirmed that the transfer layer of the transfer sheet obtained in each example had a low concealment area with a concealment rate of 50% or less. On the other hand, since the transfer layer of the transfer sheet obtained in Comparative Example 1 had a solid layer (underlying concealment layer), it was confirmed that it did not have a low concealment area. On the other hand, Comparative Example 2, which is a window film not corresponding to the transfer sheet, had a low concealment area itself, but since it had a thick PET film layer, the moisture permeability and oxygen permeability were extremely low.

[0153] (Evaluation of visual transparency) The appearance of the obtained exterior member was visually observed by 20 arbitrary adults and evaluated according to the following criteria. The results are shown in Table 2. 〇: 15 or more people answered that the transparency was good under indoor fluorescent lights △: 11 to 14 people answered that the transparency was good under indoor fluorescent lights ×: 10 or fewer people answered that the transparency was good under indoor fluorescent lights

[0154] (Measurement of visible light transmittance) The visible light transmittance of the obtained exterior member was measured. The measurement method of the visible light transmittance is the same as above. The results are shown in Table 2.

[0155] (Evaluation of Weather Resistance) The weather resistance of the obtained exterior member was evaluated. For the obtained exterior member, an accelerated weathering test using a metal halide lamp (MWOM) (a test in which ultraviolet rays are irradiated for 20 hours under the following irradiation conditions and then condensation is carried out for 4 hours under the following condensation conditions, with one cycle being the above process, and the above cycle is repeated) was carried out for 600 hours.

[0156] (Conditions of Accelerated Weathering Test) (Test Equipment) Manufactured by Dipla Wintersteiger Co., Ltd., product name "Dipla Metal Weather" (Irradiation Conditions) Illuminance: 65 mW / cm 2 , black panel temperature: 63 °C, humidity inside the chamber: 50% RH, time: 20 hours (Condensation Conditions) Illuminance: 0 mW / cm 2 , humidity inside the chamber: 98% RH, time: 4 hours

[0157] The weather resistance of the exterior member was evaluated based on the color difference. Specifically, in the exterior member transferred to the transparent resin base material, the value of the color difference (ΔE) before and after the accelerated weathering test was measured using a spectrocolorimeter (Spectrophotometer CM-3700A manufactured by Konica Minolta Inc.). In addition, the weather resistance of the exterior member was evaluated according to the following criteria. The results are shown in Table 2. 〇: ΔE is 3.2 or less △: ΔE is greater than 3.2 and 6.5 or less ×: ΔE is greater than 6.5, or there is generation of surface cracks

[0158] (Evaluation of Outgassing Resistance) The outgassing resistance of the obtained exterior member was evaluated. The evaluation of outgassing resistance was carried out by leaving the exterior member standing in an 80 °C oven for 3 days, and the presence or absence of swelling due to outgassing was evaluated according to the following criteria. The results are shown in Table 2. 〇: When observed visually under an indoor fluorescent lamp environment, no bubbles and swelling are confirmed △: When observed visually under an indoor fluorescent lamp environment, fine bubbles are confirmed, and when observed from a distance of 50 cm, the bubbles are not confirmed. ×: When observed visually under an indoor fluorescent lamp environment, bubbles or swelling are confirmed, and when observed from a distance of 50 cm, bubbles or swelling are also confirmed.

[0159]

Table 2

[0160] As shown in Table 2, in each example using a transfer sheet having a transfer layer with an ultraviolet transmittance of 1% or less and a visible light transmittance of 40% or more in the low-concealment region, it was confirmed that an exterior member having good weather resistance and utilizing the transmissive visibility of the transparent resin member could be obtained. On the other hand, in Comparative Example 1, an exterior member having a design that utilized the transmissive visibility of the transparent resin member could not be obtained. Also, in Comparative Example 2, the weather resistance and outgas resistance were lowered.

[0161] Thus, in the present disclosure, for example, the following inventions are provided. [1] A transfer sheet for manufacturing an exterior member having a transparent resin member, having a release film and a transfer layer disposed on one surface of the release film, wherein the transfer layer has, in the thickness direction from the release film side, a first protective layer, a second protective layer, and a pattern layer, in this order, wherein the first protective layer and the second protective layer contain a weathering agent, wherein the transfer layer has a low-concealment region with a concealment rate of 50% or less measured in accordance with JIS K 5600-4-1, and wherein in the low-concealment region, the ultraviolet transmittance is 1% or less and the visible light transmittance is 40% or more.

[0162] [2] The transfer sheet according to [1], wherein the thickness of the transfer layer is 5 μm or more and 28 μm or less.

[0163] [3] The above transfer layer has a water vapor transmission rate measured in accordance with JIS Z 0208 of 200 g / m 2 ·day or more, and is the transfer sheet according to [1] or [2].

[0164] [4] The above transfer layer has an oxygen permeability measured in accordance with JIS K 7126-2 of 1000 ml / (m 2 ·day·MPa) or more, and is the transfer sheet according to any one of [1] to [3].

[0165] [5] The above transfer layer has an adhesive layer on the surface opposite to the second protective layer of the above pattern layer, and is the transfer sheet according to any one of [1] to [4].

[0166] [6] The visible light transmittance of the above transparent resin member is 90% or more, and is the transfer sheet according to any one of [1] to [5].

[0167] [7] The above first protective layer contains a cured product of an ionizing radiation curable resin composition, and is the transfer sheet according to any one of [1] to [6].

[0168] [8] The above second protective layer contains a cured product of a thermosetting resin composition, and is the transfer sheet according to any one of [1] to [7].

[0169] [9] The above first protective layer contains a cured product of an electron beam curable resin composition containing urethane (meth) acrylate, and is the transfer sheet according to any one of [1] to [8].

[0170]

[10] The above second protective layer contains a cured product of a thermosetting resin composition containing a polycarbonate-based urethane acrylate copolymer, and is the transfer sheet according to any one of [1] to [9].

[0171]

[11] The transfer sheet according to any one of [1] to

[10] , wherein the first protective layer contains at least one of an ultraviolet absorber and a light stabilizer as the weathering agent.

[0172]

[12] The transfer sheet according to any one of [1] to

[11] , wherein the first protective layer contains a triazine-based ultraviolet absorber as the weathering agent.

[0173]

[13] The transfer sheet according to any one of [1] to

[12] , wherein the second protective layer contains at least one of an ultraviolet absorber and a light stabilizer as the weathering agent.

[0174]

[14] The transfer sheet according to any one of [1] to

[13] , wherein the second protective layer contains a triazine-based ultraviolet absorber as the weathering agent.

[0175]

[15] A method for manufacturing an exterior member having a transparent resin member, comprising: a preparation step of preparing a transfer sheet according to any one of [1] to

[14] ; a lamination step of laminating the transfer sheet on the transparent resin member such that the surface of the transfer sheet on the pattern layer side faces the transparent resin member; A method for manufacturing an exterior member, comprising the above steps.

[0176]

[16] In the transfer sheet, the transfer layer has an adhesive layer on the surface opposite to the second protective layer of the pattern layer. The method for manufacturing an exterior member according to

[15] , wherein in the lamination step, the transfer sheet is laminated on the transparent resin member by adhering the adhesive layer to the transparent resin member.

[0177]

[17] The method for manufacturing an exterior member according to

[15] or

[16] , which has a peeling step of peeling the release film from the transfer sheet after the above-described lamination step.

Explanation of reference numerals

[0178] 1 … Release film 2 … Transfer layer 3 … First protective layer 4 … Second protective layer 5 … Pattern layer 6 … Adhesive layer 10 … Transfer sheet 20 … Transparent resin member 100 … Exterior member

Claims

1. A transfer sheet for manufacturing an exterior component having a transparent resin component, It comprises a release film and a transfer layer disposed on one side of the release film, The transfer layer has, from the release film side, a first protective layer, a second protective layer, and a pattern layer in this order in the thickness direction. The first protective layer and the second protective layer contain a weather-resistant agent. The transfer layer has a low-opacity region where the opacity, measured in accordance with JIS K 5600-4-1, is 50% or less. In the aforementioned low-opacity region, the ultraviolet transmittance is 1% or less, and the visible light transmittance is 40% or more. The transfer layer is a transfer sheet having a moisture permeability of 200 g / m²·day or more, as measured in accordance with JIS Z 0208.

2. A transfer sheet for manufacturing an exterior member having a transparent resin member, It comprises a release film and a transfer layer disposed on one side of the release film, The transfer layer has, from the release film side, a first protective layer, a second protective layer, and a pattern layer in this order in the thickness direction. The first protective layer and the second protective layer contain a weather-resistant agent. The transfer layer has a low-opacity region where the opacity, measured in accordance with JIS K 5600-4-1, is 50% or less. In the aforementioned low-opacity region, the ultraviolet transmittance is 1% or less, and the visible light transmittance is 40% or more. The transfer layer is a transfer sheet having an oxygen permeability of 1000 ml / (m²·day·MPa) or higher, as measured in accordance with JIS K 7126-2.

3. A transfer sheet for manufacturing an exterior member having a transparent resin member, It comprises a release film and a transfer layer disposed on one side of the release film, The transfer layer has, from the release film side, a first protective layer, a second protective layer, and a pattern layer in this order in the thickness direction. The first protective layer and the second protective layer contain a weather-resistant agent. The transfer layer has a low-opacity region where the opacity, measured in accordance with JIS K 5600-4-1, is 50% or less. In the aforementioned low-opacity region, the ultraviolet transmittance is 1% or less, and the visible light transmittance is 40% or more. The transfer layer is a transfer sheet having an adhesive layer on the side of the pattern layer opposite to the second protective layer.

4. The transfer sheet according to any one of claims 1 to 3, wherein the thickness of the transfer layer is 5 μm or more and 28 μm or less.

5. The transfer sheet according to any one of claims 1 to 3, wherein the visible light transmittance of the transparent resin member is 90% or more.

6. The transfer sheet according to any one of claims 1 to 3, wherein the first protective layer comprises a cured product of an ionizing radiation-curable resin composition.

7. The transfer sheet according to any one of claims 1 to 3, wherein the second protective layer comprises a cured product of a thermosetting resin composition. The transfer sheet as described.

8. The transfer sheet according to any one of claims 1 to 3, wherein the first protective layer comprises a cured product of an electron beam curable resin composition containing urethane (meth)acrylate.

9. The transfer sheet according to any one of claims 1 to 3, wherein the second protective layer comprises a cured product of a thermosetting resin composition containing a polycarbonate-based urethane acrylic copolymer.

10. The transfer sheet according to any one of claims 1 to 3, wherein the first protective layer contains at least one of an ultraviolet absorber and a light stabilizer as the weather-resistant agent.

11. The transfer sheet according to any one of claims 1 to 3, wherein the first protective layer contains a triazine-based ultraviolet absorber as the weathering agent.

12. The transfer sheet according to any one of claims 1 to 3, wherein the second protective layer contains at least one of an ultraviolet absorber and a light stabilizer as the weather-resistant agent.

13. The transfer sheet according to any one of claims 1 to 3, wherein the second protective layer contains a triazine-based ultraviolet absorber as the weathering agent.

14. A method for manufacturing an exterior member having a transparent resin member, A preparation step of preparing a transfer sheet according to any one of claims 1 to 3, A lamination step of laminating the transfer sheet onto the transparent resin member such that the side of the transfer sheet with the pattern layer faces the transparent resin member, A method for manufacturing an exterior component, comprising the same characteristics.

15. The transfer layer in the transfer sheet has an adhesive layer on the side of the pattern layer opposite to the second protective layer, The method for manufacturing an exterior member according to claim 14, wherein in the lamination step, the transfer sheet is laminated onto the transparent resin member by adhering the adhesive layer to the transparent resin member.

16. The method for manufacturing an exterior member according to claim 14, further comprising a peeling step of peeling the release film from the transfer sheet after the lamination step.

Images