Cosmetic sheet and decorative board using the same

Abstract

To provide a decorative sheet for an entrance door and exterior and a decorative plate using the same which enable in-lining in one step, and can prevent peeling between sheet layers and surface whitening.SOLUTION: A printing pattern layer 12 on which a pattern is printed, a coloring layer 13 and a primer layer 14 are formed in this order on a back face side of a transparent raw fabric layer 11 composed of a transparent olefin resin, a surface protective layer 15 is formed on a surface side of the transparent raw fabric layer 11, an ultraviolet absorber and a light stabilizer are added to the transparent raw fabric layer 11 and the surface protective layer 15, and a laminate layer composed of other films is not provided on both the surface side and the back face side of the transparent raw fabric layer 11. The transparent raw fabric layer 11 contains at least any one of a benzotriazole-based ultraviolet absorber and a hydroxyphenyltriazine-based ultraviolet absorber, and an amount of any ultraviolet absorber of the transparent raw fabric layer 11 may be 0.1 pts.mass or more and 2 pts.mass or less with respect to 100 pts.mass of the olefin resin.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to, for example, a decorative sheet for an entrance door or exterior and a decorative board using the same, which enables inline processing in one step and can prevent peeling between sheet layers and surface whitening.

Background Art

[0002] Conventionally, a decorative sheet is known which comprises a printing master sheet formed in a sheet shape from a thermoplastic resin, a pattern printing layer formed on the surface of the printing master sheet, an uneven pattern formed by processing the surface of the printing master sheet including the pattern printing layer into an uneven shape, and a laminate layer obtained by laminating the surface of the uneven pattern with a resin equivalent to the printing master sheet (see paragraph

[0007] and FIG. 1 of Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the conventional decorative sheet has a first problem in that a plurality of steps including a printing step and a laminating step are required, making inline processing in one step difficult and increasing the manufacturing cost. Further, the conventional decorative sheet has a second problem in that the laminate layer may peel between the sheet layers due to long-term use. In view of the above-described first and second problems, the present invention enables inline processing in one step and can prevent peeling between sheet layers and surface whitening by not having a laminate layer.

Means for Solving the Problems

[0005] The cosmetic sheet according to one aspect of the present invention is characterized in that a printed pattern layer with a pattern printed thereon, a coloring layer, and a primer layer are sequentially formed on the back side of a transparent base film layer made of a transparent olefin resin, a surface protection layer is formed on the front side of the transparent base film layer, an ultraviolet absorber and a light stabilizer are added to the transparent base film layer and the surface protection layer, and neither the front side nor the back side of the transparent base film layer has a laminate layer made of another film.

[0006] Further, the cosmetic sheet according to one aspect of the present invention is characterized in that the transparent base film layer contains at least one of a benzotriazole-based ultraviolet absorber or a hydroxyphenyltriazine-based ultraviolet absorber, and any of the ultraviolet absorbers in the transparent base film layer is 0.1 part by mass or more and 2 parts by mass or less with respect to 100 parts by mass of the olefin resin. The cosmetic sheet according to one aspect of the present invention is characterized in that the surface protection layer contains at least a hydroxyphenyltriazine-based ultraviolet absorber, and the hydroxyphenyltriazine-based ultraviolet absorber is 1 part by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the acrylic resin composition forming the surface protection layer.

[0007] The cosmetic sheet according to one aspect of the present invention is characterized in that the printed pattern layer, the coloring layer, and the primer layer contain at least one of a urethane resin of polyester polyol, polycaprolactone polyol, polyalkylene glycol, acrylic polyol, or polyisocyanate as a binder resin. The cosmetic sheet according to one aspect of the present invention is characterized in that an embossed portion is formed on the front side of the surface protection layer.

[0008] The cosmetic sheet according to one aspect of the present invention is characterized in that the printed pattern layer is single-colored. The cosmetic sheet according to one aspect of the present invention is characterized in that the coloring layer is transparent or translucent. The decorative board according to one aspect of the present invention is characterized in that a base material is adhered to the side of the primer layer of the cosmetic sheet.

Effects of the Invention

[0009] According to one aspect of the present invention, it is possible to perform inline processing in one step, and it is possible to prevent peeling between sheet layers and surface whitening.

Brief Description of the Drawings

[0010]

Figure 1

Embodiments for Carrying Out the Invention

[0011] (Embodiment 1) Embodiments of the present invention will be described below with reference to FIG. 1. Here, the drawings are schematic, and the relationship between the thickness and the planar dimensions, the ratio of the thicknesses of the respective layers, etc. are different from the actual ones. Further, the embodiments shown below are examples of configurations for embodying the technical idea of the present invention, and the technical idea of the present invention does not specify the materials, shapes, structures, etc. of the constituent parts as the following. The technical idea of the present invention is within the technical scope defined by the claims described in the claims, and various modifications can be made.

[0012] (Decorative sheet 10 according to Embodiment 1) In FIG. 1, reference numeral 10 denotes a decorative sheet, and the decorative sheet 10 is used, for example, for an entrance door or an exterior, not shown. Further, the decorative sheet 10 is adhered to a base material part 20 made of metal, such as an entrance door or an exterior, to manufacture a decorative panel 30.

[0013] (Decorative sheet 10) As shown in FIG. 1, the decorative sheet 10 is configured around a transparent base film layer 11, and on the back surface side thereof, (1) a printed pattern layer 12, (2) a coloring layer 13, and (3) a primer layer 14 are formed in this order. A (4) surface protection layer 15 is formed on the surface side of the transparent base film layer 11. In addition to the transparent base film layer 11, (1) to (4) will be described later. In addition to the transparent base film layer 11, the structure of the cosmetic sheet 10 is not limited to (1) to (4), and an embossed portion 16 located on the surface protective layer 15 side may be formed.

[0014] (Base material part 20) The base material part 20 is made of, for example, aluminum. Although aluminum is exemplified as the base material part 20, it is not limited to aluminum, and it may be made of a metal such as a steel plate or stainless steel. As shown in FIG. 1, the base material part 20 is configured around the base material 21, and an adhesive layer 22 coated with an adhesive is formed on the surface side thereof.

[0015] (Regarding the point of "not having a laminate layer made of other films") Neither the front surface side nor the back surface side of the transparent base film layer 11 has a laminate layer made of other films. That is, it basically means a single-layer film centered on the transparent base film layer 11. Here, the "front surface side" of "neither the front surface side nor the back surface side of the transparent base film layer 11" means the front surface side of the surface protective layer 15 or the space between the transparent base film layer 11 and the surface protective layer 15. "Other films" means that there is nothing other than the surface protective layer 15. Also, the "back surface side" means the back surface side of the primer layer 14 or the space between the transparent base film layer 11 and the primer layer 14. "Other films" means that there is nothing other than the printed pattern layer 12, the coloring layer 13, and the primer layer 14.

[0016] As the "laminate layer made of other films", as described in Comparative Example 1 to be described later, although not shown, it refers to a "transparent olefin resin layer", and the "transparent olefin resin layer" is hereinafter also referred to as a "laminate layer". Although a "transparent olefin resin layer" is exemplified as the "laminate layer", coloring also applies. The "transparent olefin resin layer" (laminate layer) is composed of a transparent homopolypropylene resin ("Prime PP" manufactured by Prime Polymer) to which 0.5 parts by mass of a benzotriazole-based ultraviolet absorber ("Tinuvin 326" manufactured by BASF Japan Ltd.) and 0.5 parts by mass of a light stabilizer ("Chimasorb 2020" of BASF Japan Ltd.) are added, and an adhesive resin ("Admer SE800" manufactured by Mitsui Chemicals, Inc.) having functional groups imparted by modification with maleic anhydride. They are laminated by a coextrusion lamination method at an extrusion temperature of 230°C with the thickness of the transparent homopolypropylene resin being 80 μm, the thickness of the adhesive resin being 10 μm, and the adhesive resin side being in contact with the adhesive layer.

[0017] Here, the "laminate layer" refers to a "layer" formed by "lamination processing" or "lamination step" using a film. "Lamination processing" refers to covering and processing a printed matter with a thin transparent film made of raw materials such as polypropylene or polyethylene. Here, "lamination processing" is roughly classified into "hot lamination" and "cold lamination". "Hot lamination" is also called "pouch processing" and refers to a method of sandwiching a printed matter with a laminate film and adhering it by heat. "Cold lamination" is different from "hot lamination" and refers to a method that does not use heat, that is, a method of performing lamination processing only on one side of a printed matter. In other words, it means that it can be manufactured only by the printing process during the manufacture of the decorative sheet 10 and does not require a lamination process.

[0018] (Transparent base material layer 11) The transparent base material layer 11 is the base material of the decorative sheet 10 and is composed of a transparent olefin resin. The transparent base material layer 11 is formed by melt-extruding a resin composition. An (1) ultraviolet absorber and (2) light stabilizer are added to the transparent base material layer 11.

[0019] (Ultraviolet absorber) Here, the "ultraviolet absorber" includes at least one of a benzotriazole-based ultraviolet absorber or a hydroxyphenyltriazine-based ultraviolet absorber, and is 0.1 part by mass or more and 2 parts by mass or less with respect to 100 parts by mass of the olefin resin. Here, by setting the ultraviolet absorber to "0.1 part by mass or more" with respect to 100 parts by mass of the olefin resin, the weather resistance can be improved. By setting it to "2 parts by mass or less", it is possible to prevent surface clouding due to bleed-out of the ultraviolet absorber over time and improve the adhesion of the surface protective layer 15. In Example 1 described later, 0.5 part by mass of a benzotriazole-based ultraviolet absorber ("Tinuvin 326" manufactured by BASF Japan Ltd.) is added. In Example 2 described later, it is changed to a hydroxyphenyltriazine-based ultraviolet absorber ("Cyasorb 1164" manufactured by Sankyo Chemical Co., Ltd.). The hydroxyphenyltriazine-based ultraviolet absorber is also referred to as a "triazine-based" ultraviolet absorber.

[0020] (Benzotriazole-based ultraviolet absorber) Examples of the "benzotriazole-based" ultraviolet absorber include 2-(2-hydroxy-5-t-butylphenyl)-2H-benzotriazole, 2-(5-methyl-2-hydroxyphenyl)benzotriazole, 2-[2-hydroxy-3,5-bis(α,α-dimethylbenzyl)phenyl]-2H-benzotriazole, 2-(3,5-di-t-butyl-2-hydroxyphenyl)benzotriazole, 2-(3-t-butyl-5-methyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3,5-di-t-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole, 2-(3,5-di-t-amyl-2-hydroxyphenyl)benzotriazole, 2-(2'-hydroxy-5'-t-octylphenyl)benzotriazole, and the like, as well as mixtures, modified products, polymers, and derivatives thereof.

[0021] (Triazine-based ultraviolet absorber) Examples of the "triazine-based" ultraviolet absorber include 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-[(hexyl)oxy]-phenol, 2-[4-[(2-hydroxy-3-dodecyloxypropyl)oxy]-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-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-bis(2,4-dimethylphenyl)-6-(2-hydroxy-4-iso-octyloxyphenyl)-s-triazine, and mixtures, modified products, polymers, and derivatives thereof.

[0022] (Light stabilizer) As the light stabilizer, in Example 1 described later, 0.5 part by mass of a light stabilizer ("Chimasorb 2020" manufactured by BASF Japan Ltd.) is added. Then, a resin composition obtained by adding 0.5 part by mass of a light stabilizer ("Chimasorb 2020") and 0.5 part by mass of a benzotriazole-based ultraviolet absorber ("Tinuvin 326") to 100 parts by mass of a transparent homopolypropylene resin ("Prime PP" manufactured by Prime Polymer Co., Ltd.) is melt-extruded at a thickness of 120 μm to obtain the transparent base layer 11. In addition, in Example 2 described later, the light stabilizer is changed to "Tinuvin 850" manufactured by BASF Japan Ltd. Examples of the light stabilizer include bis(1,2,2,6,6-pentamethyl-4-piperidyl)[[3,5-bis(1,1-dimethylethyl)-4-hydroxyphenyl]methyl]butyl malonate, bis(1,2,2,6,6-pentamethyl-4-piperidinyl) sebacate, methyl(1,2,2,6,6-pentamethyl-4-poperidinyl) sebacate, bis(2,2,6,6-tetramethyl-1(octyloxy)-4-piperidinyl) ester of decanedioic acid, and mixtures, modified products, polymers, derivatives, etc. thereof can be used.

[0023] (Printed pattern layer 12) The printed pattern layer 12 decorates the decorative sheet 10, is located on the back side of the transparent base material layer 11, and is a layer printed with a pattern. The printed pattern layer 12 can be visually recognized from the front side of the decorative sheet 10 through the transparent base material layer 11 and the transparent or semi-transparent surface protection layer 15. Here, the type of the pattern is not particularly restricted. For example, it may be formed by a wood grain pattern, a stone grain pattern, a cloth grain pattern, an abstract pattern, geometric figures, characters, symbols, etc. alone or in combination of two or more types.

[0024] The printed pattern layer 12 contains at least one of urethane resins of polyester polyol, polycaprolactone polyol, polyalkylene glycol, acrylic polyol, and polyisocyanate as a binder resin. By making this common to the printed pattern layer 12, the coloring layer 13, and the primer layer 14, the adhesion of each layer is improved. In Example 1 described later, a pattern is printed on the back side of the transparent base material layer 11 with a urethane resin made of polyester polyol by a gravure printing method to provide the printed pattern layer 12. In Example 3 described later, it is changed to a "urethane resin" made of "acrylic polyol". As the printing method, the gravure printing method is exemplified, but it is not limited thereto. For example, ordinary printing methods such as offset printing, screen printing, flexographic printing, and inkjet printing may be used. On the other hand, the printed pattern layer 12 is, for example, single-color. Although the single color is exemplified as the printed pattern layer 12, it is not limited thereto, and a plurality of colors may also be used.

[0025] (Coloring layer 13) The coloring layer 13 is for imparting concealment to the back side of the decorative sheet 10, is located on the back side of the printed pattern layer 12, and is a colored layer. The coloring layer 13 can be visually recognized from the front side of the decorative sheet 10 through the transparent base material layer 11 and the surface protection layer 15 having translucency as a background of the printed pattern layer 12. The colored layer 13 contains, as a binder resin, at least one urethane resin selected from polyester polyol, polycaprolactone polyol, polyalkylene glycol, acrylic polyol, and polyisocyanate, similar to the printed pattern layer 12. In Example 1 described later, on the back side of the printed pattern layer 12, similar to the printed pattern layer 12, it is printed with a urethane resin made of polyester polyol by the gravure printing method to provide the colored layer 13. In Example 3 described later, it is changed to a "urethane resin" made of "acrylic polyol". The colored layer 13 is, for example, transparent or translucent. Although transparent or translucent is exemplified as the colored layer 13, it is not limited thereto, and it may have light transmissibility.

[0026] (Primer layer 14) The primer layer 14 is a layer located on the back side of the colored layer 13 and subjected to a base treatment when adhesion is performed. The primer layer 14 contains, as a binder resin, at least one urethane resin selected from polyester polyol, polycaprolactone polyol, polyalkylene glycol, acrylic polyol, and polyisocyanate, similar to the printed pattern layer 12 and the colored layer 13. In Example 1 described later, on the back side of the colored layer 13, similar to the printed pattern layer 12 and the colored layer 13, a urethane resin made of polyester polyol is coated by the gravure printing method so that the solid content is 1 g / m 2 to form the primer layer 14. In Example 3 described later, it is changed to a "urethane resin" made of "acrylic polyol". On the other hand, on the back side of the primer layer 14, the base material 21 is adhered via the adhesive layer 22 of the base material portion 20.

[0027] (Surface protection layer 15) The surface protection layer 15 is a layer located on the surface side of the transparent base material layer 11 and protecting the surface of the transparent base material layer 11. The surface protective layer 15 is added with an ultraviolet absorber and a light stabilizer, just like the transparent base film layer 11. Moreover, the surface protective layer 15 contains at least a hydroxyphenyltriazine-based ultraviolet absorber, and is 1 to 30 parts by mass with respect to 100 parts by mass of the acrylic resin composition forming the surface protective layer 15. By setting it to "1 part by mass or more" with respect to 100 parts by mass of the acrylic resin composition, the weather resistance can be improved. Also, by setting it to "30 parts by mass or less", it is possible to prevent surface clouding due to bleed-out of the ultraviolet absorber over time and surface clouding during solvent wiping.

[0028] In Example 1 described later, on the surface side of the transparent base film layer 11, 6 parts by mass of a light stabilizer ("Tinuvin 292" manufactured by BASF Japan Ltd.), 3 parts by mass of a hydroxyphenyltriazine-based ultraviolet absorber ("Tinuvin 400" manufactured by BASF Japan Ltd.), and also 3 parts by mass of (Tinuvin 479 manufactured by BASF Japan Ltd.) were added with respect to 100 parts by mass of the acrylic polyol resin, and further, ethyl acetate was added as a solvent component to adjust the solid content to 20 parts by mass, and the coating liquid was coated so that the thickness after solvent volatilization was 9 μm to form the surface protective layer 15.

[0029] (Gloss / matte coat) A gloss / matte coat may be applied to the surface side of the surface protective layer 15, or an embossed portion 16 may be formed. Gloss / matte means visually showing uneven expression with high gloss and low gloss. Currently, printing and coating are carried out in two steps, but in the future, if the printing unit of the printing machine is expanded, it will also be possible in one step. That is, for the "laminate layer", the number of lamination steps increases, while for the "gloss / matte coat", the printing process, that is, inline processing in one step is possible. (Embossed portion 16) The embossed portion 16 is located on the surface side of the surface protective layer 15 and is formed in a concave shape. The embossed portion 16 may be synchronized with, for example, the pattern of the printed pattern layer 12. By synchronizing the embossed portion 16 with the pattern of the printed pattern layer 12, the design property can be improved.

[0030] (Method for manufacturing the decorative sheet 10) The decorative sheet 10 has the above-described configuration, and its manufacturing method includes the following steps. (1) First step In the first step, a resin composition obtained by adding a light stabilizer and a benzotriazole-based ultraviolet absorber to a transparent homopolypropylene resin is melt-extruded to form a transparent base layer 11. (2) Second step In the second step, a pattern is printed on the back side of the transparent base layer 11 with a urethane resin made of polyester polyol by the gravure printing method to form a printed pattern layer 12.

[0031] (3) Third step In the third step, a urethane resin made of polyester polyol is printed on the back side of the printed pattern layer 12 in the same manner as the printed pattern layer 12 to form a colored layer 13. (4) Fourth step In the fourth step, a urethane resin made of polyester polyol is applied on the back side of the colored layer 13 by the gravure printing method in the same manner as the printed pattern layer 12 and the colored layer 13 to form a primer layer 14.

[0032] (5) Fifth step In the fifth step, a light stabilizer and a hydroxyphenyltriazine-based ultraviolet absorber are added to an acrylic polyol resin as a surface protective layer 15 on the front side of the transparent base layer 11. A main agent solution obtained by adding an ethyl acetate solvent for solid content adjustment and a hexamethylene diisocyanate-based curing agent solution obtained by adding an ethyl acetate solvent for solid content adjustment are mixed, and a coating solution obtained by further adding ethyl acetate as a solvent component is applied to form a surface protective layer 15, thereby producing the decorative sheet 10. (Method for manufacturing the decorative panel 30) The decorative board 30 has the above-described configuration, and the primer layer 14 of the decorative sheet 10 is adhered to the surface side of the base material 21 via the adhesive layer 22 to produce the decorative board 30.

[0033] (The first characteristic point of the embodiment) The first characteristic point of the decorative sheet 10 according to the embodiment is that a printed pattern layer 12 with a pattern printed thereon, a coloring layer 13, and a primer layer 14 are sequentially formed on the back side of the transparent olefin resin - composed transparent base film layer 11, and a surface protection layer 15 is formed on the surface side of the transparent base film layer 11. An ultraviolet absorber and a light stabilizer are added to the transparent base film layer 11 and the surface protection layer 15, and neither the surface side nor the back side of the transparent base film layer 11 has a laminate layer made of other films.

[0034] (The effect of the first characteristic point) According to the first characteristic point, in - line processing in one step is possible, and peeling between sheet layers and surface whitening can be prevented. Also, according to the first characteristic point, by applying a gloss / matte coat to the surface protection layer 15 as needed, there is an advantage that the design property can be improved and the manufacturing cost can be suppressed.

[0035] (The second characteristic point of the embodiment) The second characteristic point of the decorative sheet 10 according to the embodiment is that the transparent base film layer 11 contains at least one of a benzotriazole - based ultraviolet absorber or a hydroxyphenyltriazine - based ultraviolet absorber, and any ultraviolet absorber in the transparent base film layer 11 is 0.1 part by mass or more and 2 parts by mass or less with respect to 100 parts by mass of the olefin resin.

[0036] (The effect of the second characteristic point) According to the second characteristic point, by adding a light stabilizer and at least one of a benzotriazole - based ultraviolet absorber or a hydroxyphenyltriazine - based ultraviolet absorber to the transparent base film layer 11, the weather resistance can be improved. According to the second feature point, by adding an ultraviolet absorber to the transparent base fabric layer 11 in an amount of 0.1 part by mass or more per 100 parts by mass of the olefin resin, the weather resistance can be improved, and by adding 2 parts by mass or less, surface clouding due to bleed-out of the ultraviolet absorber over time can be prevented, and the adhesion of the surface protective layer 15 can be improved.

[0037] (The third feature point of the embodiment) The third feature point of the decorative sheet 10 according to the embodiment is that the surface protective layer 15 contains at least a hydroxyphenyltriazine-based ultraviolet absorber, and the hydroxyphenyltriazine-based ultraviolet absorber is 1 part by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the acrylic resin composition forming the surface protective layer 15. (Effect of the third feature point) According to the third feature point, by setting the amount to 1 part by mass or more per 100 parts by mass of the acrylic resin composition, the weather resistance can be improved, and by setting it to 30 parts by mass or less, surface clouding due to bleed-out of the ultraviolet absorber over time and surface clouding during solvent wiping can be prevented.

[0038] (The fourth feature point of the embodiment) The fourth feature point of the decorative sheet 10 according to the embodiment is that the printed pattern layer 12, the colored layer 13, and the primer layer 14 contain at least one urethane resin of polyester polyol, polycaprolactone polyol, polyalkylene glycol, acrylic polyol, and polyisocyanate as a binder resin. (Effect of the fourth feature point) According to the fourth feature point, by containing at least one urethane resin of polyester polyol, polycaprolactone polyol, polyalkylene glycol, acrylic polyol, and polyisocyanate as a binder resin in the printed pattern layer 12, the colored layer 13, and the primer layer 14, the adhesion of each layer can be improved.

[0039] (The fifth feature point of the embodiment) The fifth characteristic point of the cosmetic sheet 10 according to the embodiment is that an embossed portion 16 is formed on the surface side of the surface protective layer 15. (Effect of the fifth characteristic point) According to the fifth characteristic point, the embossed portion 16 can improve the texture and design property of the cosmetic sheet 10.

[0040] (Sixth characteristic point of the embodiment) The sixth characteristic point of the cosmetic sheet 10 according to the embodiment is that the printed pattern layer 12 is a single color. (Effect of the sixth characteristic point) According to the sixth characteristic point, by making the printed pattern layer 12 a single color, a thick and calm impression can be given.

[0041] (Seventh characteristic point of the embodiment) The seventh characteristic point of the cosmetic sheet 10 according to the embodiment is that the coloring layer 13 is transparent or translucent. (Effect of the seventh characteristic point) According to the seventh characteristic point, by making the coloring layer 13 transparent or translucent, the texture and pattern of the surface of the base material 21 adhered to the cosmetic sheet 10 can be reflected on the surface side of the cosmetic sheet 10 through the coloring layer 13.

[0042] (Eighth characteristic point of the embodiment) The cosmetic panel 30 according to the embodiment, the eighth characteristic point is that the base material 21 is adhered to the side of the primer layer 14 of the cosmetic sheet 10. (Effect of the eighth characteristic point) According to the eighth characteristic point, a cosmetic panel 30 having a cosmetic sheet 10 that can suppress the manufacturing cost and improve the weather resistance can be provided.

Example

[0043] Hereinafter, Examples 1 to 3 and Comparative Examples 1 to 6 of the cosmetic sheet according to the present invention will be described. Note that the present invention is not limited to Examples 1 to 3 below. (Example 1) The main configuration of Example 1 is as shown in Table 1 below. In addition, in Table 1 below, in addition to the configuration of Example 1, the evaluation results, as well as the configurations and evaluation results of Example 2 and Comparative Example 2 are also described.

Table 1

[0044] The decorative board 30 of Example 1 is produced as follows. In Example 1, first, 0.5 part by mass of a light stabilizer ("Chimasorb 2020" manufactured by BASF Japan Ltd.) and 0.5 part by mass of a benzotriazole-based ultraviolet absorber ("Tinuvin 326" manufactured by BASF Japan Ltd.) are added to 100 parts by mass of a transparent homopolypropylene resin ("Prime PP" manufactured by Prime Polymer Co., Ltd.). The resin composition is melt-extruded at a thickness of 120 μm to obtain a transparent base layer 11. Second, a pattern is printed on the back side of the transparent base layer 11 with a urethane resin made of polyester polyol by the gravure printing method to form a printed pattern layer 12, and then a colored layer 13 is similarly formed with a urethane resin made of polyester polyol. Third, a urethane resin made of polyester polyol is applied by the gravure printing method so that the solid content becomes 1 g / m 2 to form a primer layer 14.

[0045] Fourth, as the surface protection layer 15, 6 parts by mass of a light stabilizer ("Tinuvin 292" manufactured by BASF Japan Ltd.), 3 parts by mass of a hydroxyphenyltriazine-based ultraviolet absorber ("Tinuvin 400" manufactured by BASF Japan Ltd.), and 3 parts by mass of the same hydroxyphenyltriazine-based ultraviolet absorber (Tinuvin 479 manufactured by BASF Japan Ltd.) are added to 100 parts by mass of an acrylic polyol resin. A main agent solution with a solid content of 33 parts by mass to which an ethyl acetate solvent is added for solid content adjustment and a hexamethylene diisocyanate type curing agent solution with a solid content of 75 parts by mass to which an ethyl acetate solvent is added for solid content adjustment are prepared. The main agent solution and the curing agent solution are mixed so that the ratio is 10:1 (the ratio of the number of hydroxyl groups in the main agent solution to the number of isocyanate groups in the curing agent solution at this time is approximately 1:2). Furthermore, an ethyl acetate was added as a solvent component to adjust the solid content to 20 parts by mass, and the coating liquid was applied so that the thickness after solvent volatilization became 9 μm to form the surface protective layer 15, thereby obtaining the decorative sheet 10. Fifthly, on the back surface of the decorative sheet 10, it was applied with a thickness of 50 μm during urethane adhesion, bonded to the aluminum base material portion 20, and cured for 48 hours to fabricate the decorative board 30 of Example 1.

[0046] (Example 2) Example 2 is the same as Example 1 except that the light stabilizer of the transparent base material layer 11 was changed to "Tinuvin 850" manufactured by BASF Japan Ltd., and the ultraviolet absorber was changed to "Cyasorb 1164" manufactured by Sankyo Chemical Co., Ltd., which is a hydroxyphenyltriazine-based ultraviolet absorber, and the decorative board 30 of Example 2 was fabricated.

[0047] (Example 3) Example 3 is the same as Example 2 except that the printed pattern layer 12, the colored layer 13, and the primer layer 14 were changed to a "urethane resin" composed of "acrylic polyol", and the decorative board 30 of Example 3 was fabricated.

[0048] (Comparative Example 1) The main configuration of Comparative Example 1 is as shown in Table 2 below. In addition, in Table 2 below, in addition to the configuration of Comparative Example 1, the evaluation results, as well as the configurations and evaluation results of Comparative Example 2 and Comparative Example 2 are also described.

Table 2

[0049] In Comparative Example 1, first, although not shown in the figure, as a colored base material layer, a 70-μm-thick polypropylene film (OW manufactured by Riken Technos Co., Ltd.) to which titanium oxide and calcium carbonate were added was subjected to corona treatment, and a wood grain pattern was gravure-printed on the surface side using gravure ink (Lamistar manufactured by Toyo Ink Manufacturing Co., Ltd.) to provide a printed pattern layer. At this time, when the coating thickness of the ink was measured using a thickness gauge, it was 2 μm on average. On the printed pattern layer, a two-component curable polyurethane-based adhesive (Take lacquer and Take nate manufactured by Mitsui Chemicals, Inc.) was applied as an adhesive layer so that the dried thickness would be 1 μm.

[0050] Subsequently, second, although not shown in the figure, 0.5 parts by mass of a benzotriazole-based ultraviolet absorber (Tinuvin 326 manufactured by BASF Japan Ltd.) and 0.5 parts by mass of a light stabilizer (Chimasorb 2020 manufactured by BASF Japan Ltd.) were added to 0.5 parts by mass of a transparent homopolypropylene resin (Prime PP manufactured by Prime Polymer Co., Ltd.), and an adhesive resin (Admer SE800 manufactured by Mitsui Chemicals, Inc.) having a functional group imparted by modification with maleic anhydride were laminated by a coextrusion lamination method at an extrusion temperature of 230 °C with the thickness of the transparent homopolypropylene resin being 80 μm, the thickness of the adhesive resin being 10 μm, and the adhesive resin side being in contact with the adhesive layer to obtain a transparent olefin resin layer.

[0051] Third, as a surface protective layer, 6 parts by mass of a light stabilizer (Tinuvin 292 manufactured by BASF Japan Ltd.), 3 parts by mass of a hydroxyphenyltriazine-based ultraviolet absorber (Tinuvin 400 manufactured by BASF Japan Ltd.), and 3 parts by mass of the same hydroxyphenyltriazine-based ultraviolet absorber (Tinuvin 479 manufactured by BASF Japan Ltd.) were added to 100 parts by mass of an acrylic polyol resin. For solid content adjustment, a main agent solution with a solid content of 33 parts by mass to which an ethyl acetate solvent was added and a hexamethylene diisocyanate type curing agent solution with a solid content of 75 parts by mass to which an ethyl acetate solvent was added for solid content adjustment were used. The main agent solution and the curing agent solution were mixed so that the ratio would be 10:1 (at this time, the ratio of the number of hydroxyl groups in the main agent solution to the number of isocyanate groups in the curing agent solution was approximately 1:2). Furthermore, ethyl acetate was added as a solvent component to adjust the solid content to 20 parts by mass, and the coating liquid was applied so that the thickness after solvent volatilization would be 9 μm to form a surface protective layer and obtain a decorative sheet. Fourth, the back surface of the decorative sheet was bonded to an aluminum base material portion to produce the decorative board of Comparative Example 1.

[0052] <Comparative Example 2> Comparative Example 2 was the same as Example 1 except that the addition amount of the hydroxyphenyltriazine-based ultraviolet absorber (“Tinuvin 400”, “Tinuvin 479”) was changed to 0.4 parts by mass each, and a decorative board of Comparative Example 2 was produced. <Comparative Example 3> Comparative Example 3 was the same as Example 1 except that the addition amount of the ultraviolet absorber (“Tinuvin 400”, “Tinuvin 479”) added to the surface protective layer was changed to 16 parts by mass each, and a decorative board of Comparative Example 3 was produced.

[0053] <Comparative Example 4> The main configuration of Comparative Example 4 is as shown in Table 3 below. In addition, Table 3 below describes, in addition to the configuration of Comparative Example 4, the evaluation results, as well as the configurations and evaluation results of Comparative Example 5 and Comparative Example 6.

Table 3

[0054] Comparative Example 4 was the same as Example 1 except that the addition amount of the ultraviolet absorber (“Tinuvin 326”, “Chimasorb 2020”) added to the transparent base fabric layer was changed to 0.04 parts by mass each, and a decorative board of Comparative Example 4 was produced. <Comparative Example 5> Comparative Example 5 was the same as Example 1 except that the addition amount of the ultraviolet absorber (“Tinuvin 326”, “Chimasorb 2020”) added to the transparent base fabric layer was changed to 1.5 parts by mass each, and a decorative board of Comparative Example 5 was produced. <Comparative Example 6> Comparative Example 6 was the same as Example 1 except that the printed pattern layer, the colored layer, and the primer layer were changed to “vinyl acetate resin”, and a decorative board of Comparative Example 6 was produced.

[0055] (Evaluation Method) The evaluation methods are two types: (1) weather resistance and (2) solvent resistance. (1) Weather Resistance The weather resistance was carried out as follows. (a) Testing machine: Dipla Metal Weather (Model: KU-R5DCI-A, manufactured by Dipla Wintersteiger Co., Ltd.) (b) Test conditions: 1 cycle = Light (illuminance 70 mW / cm 2 , temperature 63 °C, humidity 50% RH,) 20 hours + Dew (temperature 30 °C, humidity 95% RH) 4 hours (30 seconds of shower before and after) cycle test was carried out. (2) Solvent resistance For solvent resistance, ethyl acetate was immersed in the non-woven fabric, and the surface state of the decorative material surface after 20 reciprocations was observed.

[0056] (Evaluation criteria) Weather resistance was evaluated in terms of (1) appearance change and (2) peeling. (1) Appearance change For appearance change, when there was fading or clouding, it was judged as "unqualified", and otherwise as "qualified". (2) Peeling For peeling, when there was delamination between layers in the sheet, it was judged as "unqualified", and otherwise as "qualified". For solvent resistance, ethyl acetate was immersed in the non-woven fabric, and the surface state of the decorative material surface after 20 reciprocations was observed. When the surface turned white, it was judged as "unqualified", and otherwise as "qualified".

[0057] (Evaluation results) The evaluation results are as shown in Tables 1 to 3 mentioned above.

[0058] (Examples 1 to 3 and Comparative Examples 1 to 6) Among Examples 1 to 3 and Comparative Examples 1 to 6, all evaluation items of Examples 1 to 3 were "qualified". In contrast, for Comparative Examples 1 to 6, there was "unqualified" in one or more of the evaluation items.

[0059] (Regarding the appearance change of weather resistance) Regarding the appearance change of weather resistance, among Comparative Examples 1 to 6, Comparative Example 2, Comparative Example 4 and "Comparative Example 5" were "unqualified". The reason for the "unqualified" (due to peeling occurrence) of Comparative Example 2 can be speculated to be that the hydroxyphenyltriazine-based ultraviolet absorbers (Tinuvin 400, Tinuvin 479) were each 0.4 parts by mass (total 0.8 parts by mass), which was too little. The reason for the "failure" (due to peeling) in Comparative Example 4 is presumably that the benzotriazole-based ultraviolet absorbers (Tinuvin 326, Chimassorb 2020) were each 0.04 parts by mass (0.08 parts by mass in total), which was too little. Peeling occurred because the absolute amount of the ultraviolet absorber contained in the transparent base layer was small. The reason for the "failure" (surface whitening) in Comparative Example 5 is presumably that the addition amount of the ultraviolet absorber ("Tinuvin 326", "Chimassorb 2020") was each 1.5 parts by mass (3.0 parts by mass in total), which was too much.

[0060] (Regarding peeling in weather resistance) Regarding peeling in weather resistance, among Comparative Examples 1 to 6, Comparative Examples 1, 2, 4, and 6 were "failures". The reason for the "failure" (peeling time: 552 hours) in Comparative Example 1 can presumably be attributed to the "coextrusion lamination method". The reason for the "failure" (peeling time: 216 hours) in Comparative Example 2 is presumably that the hydroxyphenyltriazine-based ultraviolet absorbers (Tinuvin 400, Tinuvin 479) were each 0.4 parts by mass (0.8 parts by mass in total), which was too little. In the case of Comparative Example 2, since the absolute amount of the ultraviolet absorber was small, the durability of the surface protection layer itself and the damage to the pattern ink layer, which is the part below the surface protection layer, were large, resulting in peeling. The reason for the "failure" (peeling time: 216 hours) in Comparative Example 4 is presumably that the benzotriazole-based ultraviolet absorbers (Tinuvin 326, Chimassorb 2020) were each 0.04 parts by mass (0.08 parts by mass in total), which was too little. Peeling occurred because the absolute amount of the ultraviolet absorber contained in the transparent base layer was small. The reason for the "failure" (peeling time: 120 hours) in Comparative Example 6 can presumably be attributed to the change of the pattern layer, coloring layer, and primer layer from "polyester urethane" to "vinyl chloride acetate resin".

[0061] (Regarding solvent resistance) Regarding solvent resistance, among Comparative Examples 1 to 6, only Comparative Example 3 was a "failure". The reason for the "failure" (surface whitening) in Comparative Example 3 is presumably that too much additive was added to the surface protective layer, so when the surface was rubbed with a solvent, the additive precipitated.

Explanation of Signs

[0062] 10 Cosmetic sheet 11 Transparent base film layer 12 Printed pattern layer 13 Coloring layer 14 Primer layer 15 Surface protective layer 16 Embossed part 20 Base material part 21 Base material 22 Adhesive layer 30 Decorative board

Claims

1. On the back side of the transparent base film layer composed of a transparent olefin resin, a printed pattern layer, a colored layer, and a primer layer are sequentially formed, a surface protection layer is formed on the front side of the transparent base film layer, an ultraviolet absorber and a light stabilizer are added to the transparent base film layer and the surface protection layer, neither the front side nor the back side of the transparent base film layer has a laminate layer made of another film, the surface protection layer contains two types of ultraviolet absorbers as hydroxyphenyltriazine-based ultraviolet absorbers, the printed pattern layer, the colored layer, and the primer layer contain a polyester-urethane resin or an acrylic-urethane resin as a binder resin, and are characterized by a decorative sheet.

2. The transparent base film layer contains at least one of a benzotriazole-based ultraviolet absorber or a hydroxyphenyltriazine-based ultraviolet absorber, any one of the ultraviolet absorbers in the transparent base film layer is 0.1 part by mass or more and 2 parts by mass or less with respect to 100 parts by mass of the olefin resin, and is characterized by the decorative sheet according to Claim 1.

3. The hydroxyphenyltriazine-based ultraviolet absorber in the surface protection layer is 1 part by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the acrylic resin composition forming the surface protection layer, and is characterized by the decorative sheet according to Claim 1 or Claim 2.

4. The transparent base film layer contains at least a hydroxyphenyltriazine-based ultraviolet absorber, and is characterized by the decorative sheet according to any one of Claims 1 to 3.

5. An embossed portion is formed on the front side of the surface protection layer, the printed pattern layer is single-colored, the colored layer is transparent or translucent, and is characterized by the decorative sheet according to any one of Claims 1 to 4.

6. A base material is adhered to the side of the primer layer of the decorative sheet, and is characterized by a decorative board using the decorative sheet according to any one of Claims 1 to 5.

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