Transfer sheets, decorative sheets

Abstract

The present invention provides a transfer sheet that allows a patterned layer to be transferred onto a support material, and that reduces the fading of the patterned layer even when used outdoors. [Solution] A base sheet and A weather-resistant coating layer disposed on the aforementioned base sheet, It comprises a pattern layer disposed on the weather-resistant coating layer, The weather-resistant coating layer contains one or more UV absorbers selected from triazine-based and benzotriazole-based agents, and a light stabilizer. The aforementioned pattern layer contains a hindered amine-based light stabilizer. A transfer sheet in which the weather-resistant coating layer and the pattern layer are provided so as to be removable from the base sheet.

Description

[Technical Field]

[0001] This invention relates to transfer sheets and decorative sheets. [Background technology]

[0002] Patent Document 1 discloses a transfer sheet in which a pattern layer containing an inhibitory ink for suppressing foaming in the material to be transferred is peelably provided on the surface of a base sheet, and a moisture-preventing layer is provided on the back surface of the base sheet to prevent moisture absorption into the pattern layer. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-12891 [Overview of the Initiative] [Problems that the invention aims to solve]

[0004] Transfer sheets containing a patterned layer have been known for some time. The patterned layer of the transfer sheet is transferred to a support such as a foamed resin layer, and these sheets are used as decorative sheets for indoor and outdoor building materials.

[0005] However, when building materials using decorative sheets with transferred patterns were installed outdoors, the ink in the pattern layer would fade, sometimes impairing the aesthetic appeal.

[0006] Therefore, there was a need for a transfer sheet that could transfer a patterned layer onto a support material and reduce the fading of the patterned layer even when used outdoors.

[0007] One aspect of the present invention is to provide a transfer sheet that allows a patterned layer to be transferred onto a support, and that can reduce the fading of the patterned layer even when used outdoors. [Means for solving the problem]

[0008] A transfer sheet according to one aspect of the present invention comprises a base sheet and A weather-resistant coating layer disposed on the aforementioned base sheet, It comprises a pattern layer disposed on the weather-resistant coating layer, The weather-resistant coating layer contains one or more UV absorbers selected from triazine-based and benzotriazole-based agents, and a light stabilizer. The aforementioned pattern layer contains a hindered amine-based light stabilizer. The weather-resistant coating layer and the pattern layer are provided so as to be removable from the base sheet. [Effects of the Invention]

[0009] According to one aspect of the present invention, a transfer sheet can be provided that allows a patterned layer to be transferred to a support, and reduces fading of the patterned layer even when used outdoors. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a schematic cross-sectional view of a transfer sheet according to one embodiment of the present disclosure. [Figure 2] Figure 2 is a schematic cross-sectional view of a decorative sheet obtained by transferring a transfer sheet according to one embodiment of the present disclosure onto a foamed resin layer. [Figure 3] Figure 3 is a schematic cross-sectional view of a decorative sheet according to one embodiment of the present disclosure. [Figure 4] Figure 4 is a schematic cross-sectional view of a decorative sheet according to one embodiment of the present disclosure. [Modes for carrying out the invention]

[0011] Embodiments of the present invention will be described in detail below. To facilitate understanding of the explanation, the same reference numerals are used for identical components in each drawing, and redundant explanations are omitted. Furthermore, since the drawings are schematic diagrams for illustrative purposes, the scale of each component may differ from the actual scale. [Transfer Sheet] A transfer sheet according to an embodiment of the present invention (hereinafter may be simply referred to as "the present embodiment") will be described.

[0012] FIG. 1 is a schematic cross-sectional view of the transfer sheet according to the present embodiment. FIG. 1 is a schematic cross-sectional view taken along the lamination direction of the layers of the transfer sheet 10.

[0013] As shown in FIG. 1, the transfer sheet 10 of the present embodiment can include a base sheet 11, a weatherability-imparting coating layer 12 disposed on the base sheet 11, and a pattern layer 13 disposed on the weatherability-imparting coating layer 12. Each layer will be described below. (1) Base sheet The base sheet 11 is a layer that supports the weatherability-imparting coating layer 12 and the pattern layer 13, and becomes a layer that is peeled off when transferring the weatherability-imparting coating layer 12 and the pattern layer 13.

[0014] For this reason, the base sheet 11 may be a release sheet.

[0015] Examples of the release sheet include release paper.

[0016] The release sheet may be a sheet of one or more resins selected from olefin resins, polyester resins, and the like.

[0017] The resin sheet may contain one type of resin, or may be a mixture of two or more types of resins, or a composite such as a copolymer. Further, the resin sheet may be a single layer, or may include two or more layers.

[0018] As the olefin resin, for example, one or more types selected from polypropylene resin, low-density polyethylene resin, high-density polyethylene resin, polymethylpentene resin, and the like can be used.

[0019] The release sheet may be a laminate of paper and a resin sheet. If the release sheet is a laminate of paper and a resin sheet, it may be a laminate of paper and an olefin-based resin sheet, or a laminate of paper and a polyester-based resin sheet. In particular, a laminate of paper and an olefin-based resin sheet can be suitably used as the base sheet 11.

[0020] If the release sheet is a laminate of paper and a resin sheet, the resin sheet can be placed on one or both sides of the paper.

[0021] Examples of resins that can be used for resin sheets have already been explained in the section on resin sheets, so we will omit the explanation here.

[0022] The surface morphology of the base sheet 11 is not particularly limited and may be glossy or matte. The surface morphology of the surface of the base sheet 11 on which the weather-resistant coating layer 12 etc. is laminated may be the same or different from the surface opposite it.

[0023] As described above, the base sheet 11 is the layer that is peeled off when transferring the pattern layer 13 of the transfer sheet 10 to a support such as a foamed resin layer. For this reason, the weather-resistant coating layer 12 and the pattern layer 13 are provided so as to be peelable from the base sheet 11. Peelable means that when peeling the base sheet 11 from the pattern layer 13, almost no part of the base sheet 11 remains on the exposed surface of the pattern layer 13, and it can be easily peeled off. (2) Weather-resistant coating layer (2-1) Regarding the ingredients contained The weather-resistant coating layer 12 may contain an ultraviolet absorber and a light stabilizer.

[0024] When the transfer sheet 10 is transferred to a support such as a foamed resin layer to form a decorative sheet, the weather-resistant coating layer 12 can be positioned on the surface side of the pattern layer 13, i.e., at a greater distance from the support. Furthermore, by including an ultraviolet absorber and a light stabilizer in the weather-resistant coating layer 12, the amount of ultraviolet light irradiated onto the pattern layer 13 can be reduced while simultaneously reducing the degradation of the weather-resistant coating layer 12 when the decorative sheet is formed. As a result, it becomes possible to create a transfer sheet in which the fading of the pattern layer is reduced even when the pattern layer is transferred to a support and used outdoors. (UV absorber) The weather-resistant coating layer 12 may contain one or more ultraviolet absorbers selected from triazine-based and benzotriazole-based agents.

[0025] The UV absorber absorbs ultraviolet rays, and when used as a decorative sheet, it can prevent the fading of the pattern layer 13 located beneath the weather-resistant coating layer 12.

[0026] The amount of ultraviolet absorber contained in the weather-resistant coating layer 12 is not particularly limited. For example, if the main resin composition (binder resin) of the weather-resistant coating layer 12 is 100 parts by mass, the amount of ultraviolet absorber may be 1 part by mass or more, or 10 parts by mass or more.

[0027] The weather-resistant coating layer 12 contains a UV absorber in a proportion of 1 part by mass or more, which can particularly reduce the fading of the pattern layer 13.

[0028] There is no particular upper limit to the amount of UV absorber contained in the weather-resistant coating layer 12, but the effect will saturate if added excessively. For this reason, the amount of UV absorber contained in the weather-resistant coating layer 12 may be 50 parts by mass or less, 40 parts by mass or less, or 30 parts by mass or less, when the main resin composition is 100 parts by mass.

[0029] Therefore, the weather-resistant coating layer 12 may contain an ultraviolet absorber in an amount of 1 to 50 parts by mass, 1 to 40 parts by mass, 1 to 30 parts by mass, or 10 to 30 parts by mass per 100 parts by mass of the resin composition. (Light stabilizer) The light stabilizer contained in the weather-resistant coating layer 12 is not particularly limited, but it may contain a hindered amine-based light stabilizer.

[0030] Light stabilizers have the function of reacting with and neutralizing radicals and other substances generated by ultraviolet light. Therefore, by including a light stabilizer in the weather-resistant coating layer 12, deterioration of the weather-resistant coating layer 12 itself can also be prevented.

[0031] The amount of light stabilizer contained in the weather-resistant coating layer 12 is not particularly limited. For example, if the main resin composition (binder resin) of the weather-resistant coating layer 12 is 100 parts by mass, the amount of light stabilizer may be 0.5 parts by mass or more, or 1.0 part by mass or more.

[0032] By containing a light stabilizer in the weather-resistant coating layer 12 at a ratio of 0.5 parts by mass or more, the deterioration of the weather-resistant coating layer 12 is reduced, and the fading of the pattern layer 13 can be particularly reduced.

[0033] There is no particular upper limit to the amount of light stabilizer contained in the weather-resistant coating layer 12. However, since the effect will saturate even if added excessively, the amount may be 10.0 parts by mass or less, or 5.0 parts by mass or less, when the main resin composition is 100 parts by mass.

[0034] Therefore, the weather-resistant coating layer 12 may contain a light stabilizer in an amount of 0.5 parts by mass or more and 10.0 parts by mass or less per 100 parts by mass of the resin composition, or in an amount of 1.0 part by mass or more and 5.0 parts by mass or less. (Resin composition) Furthermore, the weather-resistant coating layer 12 may contain a resin composition (binder resin). As the resin composition (binder resin), one or more types selected from, for example, urethane resins, acrylic resins, polyester resins, vinyl resins such as vinyl chloride-vinyl acetate copolymers can be used individually or as a mixture, copolymer, or other composite material. (2-2) Amount of coating The amount of weather-resistant coating layer 12 applied is not particularly limited, but the application amount is 2 g / m². 2 More than 6g / m 2 It may also be less than 3g / m 2 More than 4g / m 2 The following is also acceptable.

[0035] Application amount: 2g / m² 2 By doing so, it becomes easier to make the thickness of the weather-resistant coating layer 12 uniform, and the UV shielding effect can also be made sufficiently high.

[0036] Application amount: 6g / m² 2 By doing the following, the thickness of the weather-resistant coating layer 12 and the transfer sheet 10 can be reduced, thereby improving workability when transferring to a support such as a foamed resin layer. (2-3) Thickness The thickness T12 of the weather-resistant coating layer 12 is not particularly limited, but may be 7 μm or less, or 6 μm or less.

[0037] By setting the thickness T12 of the weather-resistant coating layer 12 to 7 μm or less, the workability (processability) when transferring to a support such as a foamed resin layer and the productivity when manufacturing the transfer film can be improved.

[0038] The lower limit of the thickness T12 of the weather-resistant coating layer 12 is not particularly limited, but may be, for example, 1 μm or more, or 2 μm or more.

[0039] By setting the thickness T12 of the weather-resistant coating layer 12 to 1 μm or more, it becomes easier to make the thickness of the weather-resistant coating layer 12 uniform, and the ultraviolet shielding effect can also be sufficiently high.

[0040] Therefore, the thickness T12 of the weather-resistant coating layer 12 may be 1 μm or more and 7 μm or less, or 2 μm or more and 6 μm or less. (3) Pattern layer The pattern layer 13 can be positioned to include the printed surface 10A of the transfer sheet 10, as shown in Figure 1.

[0041] The pattern layer 13 can have any pattern, such as decorative patterns, designs, colors, wood grain patterns, cork patterns, stone patterns, tile patterns, grout lines, or wood grain pore patterns, for decorating the surfaces of buildings such as houses and shops, vehicles such as trains and automobiles, airplanes and ships, interior and exterior materials, flooring, etc.

[0042] The pattern layer 13 may include, for example, a pattern ink section 131 and a foam-suppressing ink section 132. (3-1) Ink portion of the design The pattern ink section 131 can contain colored ink.

[0043] As for the colored ink, any conventionally known printing ink can be used without particular limitation. Examples of pigments for printing inks include isoindolinone yellow, polyazo red, phthalocyanine blue, carbon black, iron oxide, titanium dioxide, quinacridone, and diketopyrrolopyrrole, but are not necessarily limited to these.

[0044] Furthermore, the resin composition (binder resin) used in printing inks can be selected from, for example, urethane resins, acrylic resins, polyester resins, vinyl resins such as vinyl chloride-vinyl acetate copolymers, and used individually, as a mixture, or as a composite material such as a copolymer.

[0045] Furthermore, the pattern ink portion 131 may contain additives such as various curing agents, catalysts, stabilizers, and initiators, depending on the selected resin composition. (3-2) Foam-suppressing ink section The foam-suppressing ink section 132 can be positioned between adjacent pattern ink sections 131 and can contain foam-suppressing ink.

[0046] As the foam-suppressing ink, any conventionally known foam-suppressing agent can be used. As foam-suppressing agents, for example, one or more selected from triazine compounds, triazole compounds such as benzotriazoles and aminotriazoles, trimellitic anhydride, maleic acid, fumaric acid, and adipic acid can be used. Among these, triazole compounds are preferred as foam-suppressing agents, and aminotriazoles are more preferred.

[0047] The foam-suppressing ink portion 132, which contains the suppressing ink, may contain one or more resins selected from the group of resins, such as urethane resins, acrylic resins, polyester resins, and vinyl resins such as vinyl chloride-vinyl acetate copolymers, as the resin composition (binder resin). The binder resin may be a mixture of two or more resins selected from the above group of resins, or it may be a composite such as a copolymer.

[0048] The foam-suppressing ink section 132 may contain extender pigments and various stabilizers to reduce tackiness. For example, silica may be used as the extender pigment.

[0049] The foam-suppressing ink section 132 may contain a foam-suppressing agent in addition to the color ink described in the pattern ink section 131.

[0050] The pattern ink portion 131 and the foam-suppressing ink portion 132 of the pattern layer 13 can be formed by one or more printing methods selected from gravure printing, offset printing, gravure offset printing, screen printing, flexographic printing, inkjet printing, etc. (3-3) Light stabilizers The inventors of this invention have investigated a transfer sheet that can transfer a patterned layer onto a support and reduce the fading of the patterned layer even when used outdoors.

[0051] During the investigation, it was confirmed that the fading of the pattern layer 13 could be reduced by using a transfer sheet having a weather-resistant coating layer 12. Further investigation was conducted to further improve the effect. As a result, it was found that by adding a hindered amine-based light stabilizer to the pattern layer 13 in addition to providing a weather-resistant coating layer, the fading of the pattern layer 13 can be reduced even when the pattern layer 13 is transferred to a support and used outdoors, thus completing the present invention.

[0052] Therefore, the pattern layer 13 of this embodiment can contain a hindered amine-based light stabilizer. Of the pattern layer 13, at least one selected from the pattern ink portion 131 and the foam-suppressing ink portion 132 may contain a light stabilizer, or both the pattern ink portion 131 and the foam-suppressing ink portion 132 may contain a light stabilizer. It is particularly preferable that both the pattern ink portion 131 and the foam-suppressing ink portion 132 contain a light stabilizer.

[0053] Light stabilizers have the function of reacting with radicals and other substances generated by ultraviolet light and rendering them harmless. Therefore, by containing a light stabilizer in the pattern layer 13, deterioration and fading of the pattern layer 13 can be prevented.

[0054] The amount of light stabilizer contained in the pattern layer 13 is not particularly limited, and may be 0.5 parts by mass or more, or 1.0 part by mass or more, when the main resin composition (binder resin) is 100 parts by mass.

[0055] By including a light stabilizer in the pattern layer 13 at a ratio of 0.5 parts by mass or more, the deterioration and fading of the pattern layer 13 can be particularly reduced.

[0056] There is no particular upper limit to the amount of light stabilizer contained in the pattern layer 13. However, since the effect will saturate even if added excessively, the amount may be 10.0 parts by mass or less, or 5.0 parts by mass or less, when the main resin composition is 100 parts by mass.

[0057] Therefore, the pattern layer 13 may contain a light stabilizer in an amount of 0.5 parts by mass or more and 10.0 parts by mass or less per 100 parts by mass of the resin composition, or in an amount of 1.0 part by mass or more and 5.0 parts by mass or less.

[0058] The transfer sheet of this embodiment described above has a weather-resistant coating layer 12 containing an ultraviolet absorber and a light stabilizer, and the pattern layer 13 contains a light stabilizer. Therefore, even when the pattern layer 13 is transferred to a support and used outdoors, the fading of the pattern layer 13 can be reduced.

[0059] The transfer sheet of this embodiment is not particularly limited in its use, but because it is weather-resistant, it can be suitably used when manufacturing decorative sheets for exterior materials intended for outdoor use. [Decorative sheet] Next, an example of the configuration of the decorative sheet in this embodiment will be described.

[0060] The decorative sheet of this embodiment is obtained by transferring the weather-resistant coating layer 12 and the pattern layer 13 of a transfer sheet according to one aspect of this disclosure onto a foamed resin layer. For this reason, the matters already described will be omitted from further explanation.

[0061] Figures 2, 3, and 4 show schematic cross-sectional views of the decorative sheet of this embodiment. Figures 2, 3, and 4 are schematic cross-sectional views of the decorative sheet 20, decorative sheet 30, and decorative sheet 40 in a cross-section along the lamination direction of the layers.

[0062] As shown in Figure 2, the decorative sheet 20 of this embodiment may have a foamed resin layer 21, a pattern layer 13 placed on the foamed resin layer 21, and a weather-resistant coating layer 12 placed on the pattern layer 13. Each layer will be described below. (1) Foamed resin layer As the foamed resin layer 21, for example, a base material used for building materials such as wall materials can be used. As the foamed resin layer 21, for example, polyvinyl chloride resin may be used.

[0063] The foamed resin layer 21 may contain a foaming agent or foaming aid in addition to a resin such as polyvinyl chloride resin. When the foamed resin layer 21 contains polyvinyl chloride resin as the resin, for example, it may contain a foaming agent in a ratio of 0.1 to 10 parts by mass and a foaming aid in a ratio of 0.01 to 5 parts by mass per 100 parts by mass of polyvinyl chloride resin.

[0064] Examples of foaming agents include azo compounds such as azodicarbonamide (ADCA), 1,1'-azobis(1-acetoxy-1-phenylethane), dimethyl-2,2'-azobisbutyrate, dimethyl-2,2'-azobisisobutyrate, 2,2'-azobis(2,4,4-trimethylpentane), 1,1'-azobis(cyclohexane-1-carbonitride), and 2,2'-azobis[N-(2-carboxyethyl)-2-methyl-propionamidine], as well as N,N'-dinitrosopentamethylenetetramine (DPT). One or more of the following can be used: nitroso compounds, hydrazine derivatives such as 4,4'-oxybis(benzenesulfonyl hydrazide) and diphenylsulfon-3,3'-disulfonyl hydrazide, semicarbazide compounds such as p-toluenesulfonyl semicarbazide, organic pyrolysis-type blowing agents such as trihydrazinotriazine, bicarbonates such as sodium bicarbonate and ammonium bicarbonate, carbonates such as sodium carbonate and ammonium carbonate, nitrites such as ammonium nitrite, and inorganic pyrolysis-type blowing agents such as hydrogen compounds. Among the blowing agents, azodicarbonamide (ADCA) and sodium bicarbonate can be preferably used.

[0065] As a foaming aid, one or more types selected from zinc oxide (ZnO), zinc stearate, salicylic acid, phthalic acid, stearic acid, oxalic acid, urea or its derivatives can be used, which have effects such as lowering the decomposition temperature of the foaming agent, accelerating decomposition, and homogenizing bubbles.

[0066] In addition to the foamed resin layer 21, the support for the decorative sheet 20 may also have other support members such as paper, resin sheets, synthetic paper, or nonwoven fabric on the second surface 21B, which is located opposite the first surface 21A that faces the pattern layer 13 of the foamed resin layer 21. (2) Pattern layer, weather-resistant coating layer The pattern layer 13 and the weather-resistant coating layer 12 were explained using the transfer sheet, so their explanations will be omitted here. (3) Protective layer As shown in Figure 3, the decorative sheet 30 may have a protective layer or the like on the surface 12A of the weather-resistant coating layer 12 for purposes such as providing durability such as abrasion resistance or gloss.

[0067] The protective layer can be made of any material depending on the purpose. The protective layer can be selected from thermoplastic resins, thermosetting resins, UV-curable resins, radiation-curable resins, inorganic materials, or organic-inorganic hybrid coating materials, and can be used alone, in mixtures, or as composites.

[0068] The decorative sheet 30 shown in Figure 3 has a sol coat layer 31 and a UV-curable resin coat layer 32 as protective layers, but the decorative sheet 30 is not limited to this configuration, and one or more protective layers can be arranged depending on the required characteristics of the decorative sheet 30. (4) Foaming treatment As shown in Figure 4, the decorative sheet 40 of this embodiment may have irregularities on its surface 40A. Specifically, as shown in Figure 4, the surface 40A of the decorative sheet 40 may have recesses 41 and protrusions 42 of relatively different heights. As shown in Figure 4, the irregularities can be provided on the surface 40A of the decorative sheet 40 that is opposite to the surface on which the foamed resin layer 21 is arranged.

[0069] One possible foaming treatment for transforming the unfoamed decorative sheet 20 and decorative sheet 30, as shown in Figures 2 and 3, into a decorative sheet 40 having an uneven structure as shown in Figure 4, is to heat the unfoamed decorative sheet in an oven or the like.

[0070] The oven heating should be carried out until the foaming agent contained in the foamed resin layer 21 decomposes and gaseous components are generated. When the unfoamed decorative sheet is heated, foaming occurs in areas where the foam-suppressing ink portion 132 is absent, forming relatively tall convex portions 42, while foaming is suppressed in areas where the foam-suppressing ink portion 132 is present, forming relatively low recessed portions 41.

[0071] The decorative sheet of this embodiment described above has a weather-resistant coating layer 12 containing an ultraviolet absorber and a light stabilizer, and the pattern layer 13 contains a light stabilizer. Therefore, even when used outdoors, the fading of the pattern layer 13 can be reduced.

[0072] The decorative sheet of this embodiment is not particularly limited in its use, but because it is weather-resistant, it can be suitably used as an exterior material intended for outdoor use. [Examples]

[0073] The present invention will be described with specific examples below, but it is not limited to these examples. (A) Evaluation Method (A-1) Weather resistance evaluation In the following examples and comparative examples, the transfer sheets were prepared, and the pattern layer 13, etc., was transferred onto the foamed resin layer using a transfer machine. After that, the base sheet 11 of the transfer sheet was peeled off. Through these operations, a decorative sheet 20 having the cross-sectional structure shown in Figure 2 was obtained.

[0074] A sol coat layer 31 and a UV-curable resin coat layer 32 were formed on the surface 12A of the weather-resistant coating layer 12 of the decorative sheet 20 to obtain a decorative sheet 30, which is an unfoamed decorative sheet having the cross-sectional structure shown in Figure 3.

[0075] The decorative sheet 30 described above was left in an oven at 220°C for 2 minutes to foam a foamed resin layer 21 containing polyvinyl chloride resin, and a decorative sheet 40 having the cross-sectional structure shown in Figure 4 was prepared as an evaluation decorative sheet. The decorative sheet 40 has irregularities on its surface 40A.

[0076] As explained below, the transfer sheet and decorative sheet of Comparative Example 2 do not have the weather-resistant coating layer 12.

[0077] Next, an exposure test was conducted on the evaluation decorative sheet in accordance with JIS K 7350-2 (2008). Using a xenon weather meter tester (X75, manufactured by Suga Test Instruments Co., Ltd.), the surface 40A of the decorative sheet 40 was exposed to a black panel temperature of 63°C and a xenon lamp illuminance of 60 W / m². 2 The area was irradiated with light. The light irradiation was performed for 102 minutes, followed by another 18 minutes of light irradiation and water spraying, and this cycle was repeated multiple times.

[0078] The above light irradiation cycle was repeated, and the time it took for the color difference ΔE of the pattern ink portion 131 of the pattern layer 13 to become 3.0 or less compared to before the test was measured.

[0079] The evaluation was as follows: if the above time was 4000 hours or more, it was rated A; if it was 3000 hours or more but less than 4000 hours, it was rated B; if it was 2000 hours or more but less than 3000 hours, it was rated C; and if it was less than 2000 hours, it was rated D.

[0080] A rating of A indicates the highest weather resistance, with B, C, and D indicating decreasing weather resistance. Ratings A, B, and C indicate that the transfer sheet can reduce the fading of the pattern layer even when the pattern layer is transferred to the support and used outdoors.

[0081] The evaluation results are shown in the weather resistance column of Table 1. (A-2) Processability evaluation When manufacturing decorative sheets using the transfer sheets prepared in the following examples and comparative examples, the process was evaluated by the time required to transfer the pattern layer 13, etc., onto the foamed resin layer using a transfer machine and to peel off the base sheet 11 of the transfer sheet.

[0082] In each example and comparative example, the same sample was used and the procedure was repeated 10 times, with evaluation based on the average time.

[0083] When the time for Comparative Example 2, which does not have a weather-resistant coating layer, was set as the baseline of 1, cases of 1 or less were evaluated as A, cases longer than 1 were evaluated as B, and if the weather-resistant coating layer 12 or the pattern layer 13 remained on the substrate sheet after transfer, it was evaluated as C, indicating that processing was not possible.

[0084] A rating of A indicates the highest machinability, with B and C indicating decreasing machinability.

[0085] A transfer sheet can be said to have excellent processability if it receives an A or B rating. (A-3) Productivity evaluation The evaluation was based on the time required to manufacture the transfer sheet.

[0086] In each example and comparative example, a transfer sheet with a length of 100 m along its longitudinal direction was manufactured under the same conditions, and the evaluation was based on the average time required for manufacturing per unit length.

[0087] When the time for Comparative Example 2, which does not have a weather-resistant coating layer, was set as the baseline of 1, cases of 1 or less were evaluated as A, cases longer than 1 but 1.2 or less as B, cases longer than 1.2 as C, and cases longer than 1.2 and with a low yield of 60% or less making production difficult were evaluated as D, indicating that production was impossible.

[0088] A rating of A indicates the highest productivity, followed by B, C, and D, in descending order of productivity.

[0089] A transfer sheet can be considered highly productive if it receives an A or B rating. (B) Manufacturing conditions of the transfer sheets in the examples and comparative examples [Example 1] A transfer sheet having the cross-sectional structure shown in Figure 1 was prepared. (Base sheet) As the base sheet 11, we prepared polypropylene laminated paper, which is a release sheet made by laminating polypropylene resin on both sides of paper. (Weather-resistant coating layer) A weather-resistant coating layer 12 was formed on the surface of the polypropylene resin layer of the base sheet 11 by gravure printing.

[0090] The weather-resistant coating layer 12 contains 100 parts by mass of an acrylic-vinyl chloride-vinyl acetate copolymer as the main component, 20 parts by mass of Tinuvin 479 as an ultraviolet absorber, and 1 part by mass of Tinuvin 123 as a light stabilizer. The ultraviolet absorber used is triazine-based, and the light stabilizer is hindered amine-based.

[0091] The weather-resistant coating layer 12 has an application amount of 4 g / m². 2 The coating was applied so that the thickness T12 was 4 μm. (Pattern layer) A pattern layer 13, including a pattern ink portion 131 and a foam-suppressing ink portion 132, was formed on the surface of the weather-resistant coating layer 12 by gravure printing.

[0092] The pattern ink portion 131 of the pattern layer 13 contains 100 parts by mass of acrylic-vinyl chloride-vinyl acetate copolymer, which is the main component, 20 parts by mass of diketopyrrolopyrrole pigment, which is the pigment, and 3 parts by mass of Tinuvin 123, which is the light stabilizer. The foam-suppressing ink portion 132 has the same composition as the pattern ink portion 131, except that it does not contain a pigment and contains a triazole compound, which is the foam-suppressing agent. The light stabilizer used is a hindered amine type.

[0093] The evaluation described in "(A) Evaluation Method" was performed using the obtained transfer sheets. The evaluation results are shown in Table 1. [Example 2] The coating amount of the weather resistance-imparting coating layer is set to 2 g / m 2 , and a transfer sheet was produced and evaluated under the same conditions and procedures as in Example 1, except that the thickness T12 was set to 2 µm.

[0094] The evaluation results are shown in Table 1. [Example 3] The coating amount of the weather resistance-imparting coating layer is set to 6 g / m 2 , and a transfer sheet was produced and evaluated under the same conditions and procedures as in Example 1, except that the thickness T12 was set to 6 µm.

[0095] The evaluation results are shown in Table 1. [Example 4] A transfer sheet was produced and evaluated under the same conditions and procedures as in Example 1, except that when forming the weather resistance-imparting coating layer, the content of the ultraviolet absorber was set to 30 parts by mass.

[0096] The evaluation results are shown in Table 1. [Example 5] A transfer sheet was produced and evaluated under the same conditions and procedures as in Example 1, except that when forming the pattern layer, the content of the light stabilizer was set to 1 part by mass.

[0097] The evaluation results are shown in Table 1. [Example 6] The coating amount of the weather resistance-imparting coating layer is set to 7 g / m 2 , and a transfer sheet was produced and evaluated under the same conditions and procedures as in Example 1, except that the thickness T12 was set to 7 µm.

[0098] The evaluation results are shown in Table 1. [Example 7] The coating amount of the weather resistance-imparting coating layer is set to 1 g / m 2 , and the thickness T12 is set to 1 µm. In addition, with respect to the weather resistance-imparting coating layer, the content of the ultraviolet absorber was set to 30 parts by mass. Except for the above points, a transfer sheet was produced and evaluated under the same conditions and procedures as in Example 1.

[0099] The evaluation results are shown in Table 1. [Comparative Example 1] Except for not including a light stabilizer when forming the pattern layer 13, and setting its proportion to 0, the transfer sheet was manufactured and evaluated under the same conditions and procedures as in Example 1.

[0100] The evaluation results are shown in Table 1. [Comparative Example 2] A transfer sheet was manufactured and evaluated under the same conditions and procedures as in Example 1, except that the weather-resistant coating layer 12 was not formed, and only the pattern layer 13 was formed on the base sheet 11.

[0101] The evaluation results are shown in Table 1.

[0102] [Table 1] According to the results shown in Table 1, the transfer sheets of Examples 1 to 7, which have a weather-resistant coating layer 12 containing an ultraviolet absorber and a light stabilizer, and whose pattern layer 13 also contains a light stabilizer, were confirmed to have a weather resistance rating of one of A to C. In other words, the transfer sheets of Examples 1 to 7, which are transfer sheets according to one aspect of the present disclosure, were confirmed to be transfer sheets that can reduce the fading of the pattern layer even when the pattern layer is transferred to a support and used outdoors.

[0103] Furthermore, in all examples and comparative examples, it was confirmed that the thickness of the weather-resistant coating layer was the desired thickness.

[0104] Examples of embodiments of the present disclosure are as follows:

[0105] <1> A base sheet and A weather-resistant coating layer disposed on the aforementioned base sheet, It comprises a pattern layer disposed on the weather-resistant coating layer, The weather-resistant coating layer contains one or more UV absorbers selected from triazine-based and benzotriazole-based agents, and a light stabilizer. The aforementioned pattern layer contains a hindered amine-based light stabilizer. A transfer sheet in which the weather-resistant coating layer and the pattern layer are provided so as to be removable from the base sheet.

[0106] <2> The amount of the weather-resistant coating layer applied is 2 g / m². 2 More than 6g / m 2 The following is: <1> The transfer sheet described above.

[0107] <3> The weather-resistant coating layer contains the ultraviolet absorber in a proportion of 1 to 30 parts by mass per 100 parts by mass of the resin composition. <1> or <2> The transfer sheet described above.

[0108] <4> The thickness of the weather-resistant coating layer is 7 μm or less. <1> from <3> A transfer sheet as described in one of the following.

[0109] <5> A foamed resin layer, A pattern layer disposed on the foamed resin layer, It comprises a weather-resistant coating layer disposed on the pattern layer, The weather-resistant coating layer contains one or more UV absorbers selected from triazine-based and benzotriazole-based agents, and a light stabilizer. The aforementioned patterned layer is a decorative sheet containing a hindered amine-based light stabilizer.

[0110] <6> Having an uneven surface, <5> The decorative sheet described above. [Explanation of Symbols]

[0111] 10 Transfer Sheets 10A printing surface 11 Base sheet 12 Weather-resistant coating layer 12A surface T12 Thickness 13 Pattern Layers 131. Ink portion of the design 132 Foam-suppressing ink section 20 Decorative sheets (non-foamed decorative sheets) 21 Foamed resin layer 21A 1st page 21B 2nd side 30 Decorative sheets (non-foamed decorative sheets) 31. Zolcoat layer 32 UV-curable resin coating layer 40 decorative sheets 40A surface 41 Recess 42 Convex part

Claims

1. A base sheet and A weather-resistant coating layer disposed on the aforementioned base sheet, It comprises a pattern layer disposed on the weather-resistant coating layer, The weather-resistant coating layer contains one or more UV absorbers selected from triazine-based and benzotriazole-based materials, and a light stabilizer. The aforementioned pattern layer contains a hindered amine-based light stabilizer. A transfer sheet in which the weather-resistant coating layer and the pattern layer are provided so as to be removable from the base sheet.

2. The amount of the weather-resistant coating layer applied is 2 g / m². ２ 6g / m or more ２ The transfer sheet according to claim 1, which is as follows:

3. The transfer sheet according to claim 1 or 2, wherein the weather-resistant coating layer contains the ultraviolet absorber in a proportion of 1 part by mass or more and 30 parts by mass or less per 100 parts by mass of the resin composition.

4. The transfer sheet according to claim 1 or claim 2, wherein the thickness of the weather-resistant coating layer is 7 μm or less.

5. A foamed resin layer, A pattern layer disposed on the foamed resin layer, It comprises a weather-resistant coating layer disposed on the pattern layer, The weather-resistant coating layer contains one or more UV absorbers selected from triazine-based and benzotriazole-based materials, and a light stabilizer. The aforementioned patterned layer is a decorative sheet containing a hindered amine-based light stabilizer.

6. The decorative sheet according to claim 5, having an uneven surface.

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