JP2008279607A - Decorative sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a decorative sheet capable of sticking on a transparent substrate such as glass and expressing a mirror surface property with an irregular feeing and a depth and a design with glossy feeling seen from both the obverse and reverse of the substrate. <P>SOLUTION: The decorative sheet is characterized in that a transparent or semi-transparent resin layer is provided on the surface and the back surface of a colored thermoplastic resin sheet in which an irregularity is provided on the surface and another irregularity following the irregularity of the surface is provided, a transparent or semi-transparent surface protective layer is provided on the surface of the sheet, and a transparent or semi-transparent pressure-sensitive adhesive layer is provided on the back surface of the sheet. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a decorative sheet that is used in the field of building materials such as a store, and can be applied to a glass window or the like to obtain a graceful design expression from both the inside and outside of the window.

  In some cases, a transparent or translucent decorative sheet is attached to the surface of a glass window or the like so that the pattern can be seen from both the inside and the outside. However, although the pattern can be seen from both sides, the surface unevenness is provided only on one side, and the unevenness can be obtained only from the inside or the bonded side, which is inferior to the design feeling.

On the other hand, a decorative sheet is known in which a surface is provided with irregularities on the lower side of a decorative sheet having a transparent surface, and the surface has a feeling of irregularities. However, the back side is a colored plane, and the design from both sides is not considered.
JP 06-278261 A

  In order to solve such problems of the present invention, that is, the problem is that it can be bonded to a transparent substrate such as glass, and it can be seen from both the front and back sides of the substrate. Therefore, an object of the present invention is to provide a decorative sheet capable of expressing a design having a specularity and depth with a feeling of unevenness inside, and a feeling of shine.

  The present invention solves such a problem, that is, the invention according to claim 1 is a colored thermoplastic resin sheet in which unevenness is provided on the front surface and unevenness following the unevenness is provided on the back surface. A decorative sheet comprising a transparent or translucent resin layer on front and back surfaces.

  The invention according to claim 2 is the decorative sheet according to claim 1, wherein a transparent or translucent surface protective layer is provided on the surface of the decorative sheet.

  The invention described in claim 3 is the decorative sheet according to claim 1, wherein a transparent or translucent pressure-sensitive adhesive layer is provided on the back surface of the decorative sheet.

  According to the first aspect of the present invention, there is an effect that it is possible to obtain a decorative sheet having a specularity and depth with a sense of unevenness inside and being shining from both the front and back surfaces.

  Moreover, even if it is a case where the decorative sheet | seat of this invention is provided in the outdoor sides, such as a window glass, according to the invention of the said Claim 2, there exists an effect that it will have various tolerances, maintaining transparency.

  According to the invention described in claim 3 of the present invention, there is an effect that it can be bonded to a window glass or a show window while maintaining transparency.

Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a cross-sectional structure of one embodiment of the decorative sheet of the present invention.
The colored thermoplastic resin sheet 1 has transparent or semi-transparent resin layers 2 and 2 'on the front side and back side, and is appropriately provided with a surface protective layer 3 and an adhesive layer 4, and is transparent or translucent. It is bonded to the glass substrate 5.

  The colored thermoplastic resin sheet 1 in the present invention may be any one that is colored by dispersing a pigment or the like and has a thermoplasticity that can be formed with unevenness. Vinyl chloride resins can be used, but resins other than vinyl chloride resins are required from the viewpoint of environmental problems in recent years, and olefinic thermoplastic resins, specifically polypropylene, are preferably used. Polypropylene includes homo- or random copolymerization, and may be selected according to the application. In the case of a homo system, a flexible film can be formed if the amorphous type has a high atactic component.

  As the transparent or translucent thermoplastic resin layers 2 and 2 ′, an olefin-based thermoplastic resin similar to the colored thermoplastic resin sheet 1 is suitable, and a homo- or random-copolymerized polypropylene is selected depending on the application. That's fine. In the case of a homo system, a flexible film can be formed if the amorphous type has a high atactic component.

  Moreover, it is preferable to add additives, such as an ultraviolet absorber and a light stabilizer, to the transparent or translucent thermoplastic resin layers 2, 2 ′ in order to perform weather resistance prescription. As the UV absorber, benzotriazole, triazine, benzophenone and the like are formulated and added. The addition amount may be added according to the desired weather resistance, but is 0.1% to 10%, preferably 1% to 5% with respect to the resin solid content. As the light stabilizer, a hindered amine system is suitable, and the addition amount may be added according to the desired weather resistance, but it is 0.1 to 10% by weight, preferably 1% to 5% based on the resin solid content. It is.

  Examples of the benzotriazole ultraviolet absorber include 2- (2-hydroxy-5-tert-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) benzotriazo And the like, mixtures thereof, modified products, polymers, and derivatives.

  As the triazine-based ultraviolet absorber, 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 (2,4dimethylphenyl) -1,3,5-triazine, 2,4-bis (2,4-dimethylphenyl) Examples include -6- (2-hydroxy-4-iso-octyloxyphenyl) -s-triazine, mixtures thereof, modified products, polymers, and derivatives.

  Examples of benzophenone ultraviolet absorbers include octabenzone, modified products, polymers, and derivatives.

  As a hindered amine light stabilizer, 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-popperidinyl) sebacate, bis (2) decanedioate , 2,6,6-tetramethyl-1 (octyloxy) -4-piperidinyl) ester and the like, and mixtures, modified products, polymers, derivatives and the like thereof.

  These compounds can be appropriately blended and formed into a film by an extrusion molding method, an inflation molding method, a calendar molding method, or the like. The total thickness of the film is suitably about 30 to 120 μm considering the ease of adhesive bonding, weather resistance, transparency, and the like.

  As the surface protective layer 3 in the present invention, a layer made of a silicone-modified acrylic urethane resin in which an organopolysiloxy group is introduced into the side chain of the acrylic urethane resin can be used. In particular, the silicone-modified acrylic urethane resin is a reaction product of an acrylic polyol compound, an organopolysiloxane alkylol compound having a hydroxyl group at a terminal, and a polyisocyanate compound. The coating amount after drying is preferably about 2 to 20 g / m2. Further, ionizing radiation curable resin (electron beam, ultraviolet curable resin) may be used.

  As the pressure-sensitive adhesive layer 4 in the present invention, an acrylic pressure-sensitive adhesive is most commonly used. In addition, a styrene-butadiene rubber-based pressure-sensitive adhesive, a chloroprene rubber-based pressure-sensitive adhesive, an olefin rubber-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, and silicone. A system adhesive can be used. In terms of weather resistance, acrylic adhesives are dominant. An ultraviolet absorber, a light stabilizer and the like may be added to the adhesive layer. The layer thickness of the pressure-sensitive adhesive layer 4 is generally about 5 to 50 μm. The coating is preferably in the form of lines, dots, etc., from 8% to 12% of the total area from the viewpoint of maintaining adhesive strength and air permeability.

  The depth of the unevenness provided in the colored thermoplastic resin layer of the present invention is not particularly defined as long as sufficient unevenness can be obtained, and is preferably about 20 to 150 μm although it depends on the balance with the sheet thickness. The method of providing the unevenness is not particularly limited as long as it can be provided so as to have the unevenness that follows the back surface, but it is preferable to provide a single layer sheet while pressing it on an uneven roll.

  A silver polypropylene resin sheet (“OSH20159” layer thickness 120 μm manufactured by Riken Technos Co., Ltd.) was used as the colored thermoplastic resin sheet, and this was embossed at a sheet temperature of 120 ° C. The deepest portion of the concave portion on the embossed plate side was 40 μm, and a convex portion following the concave portion was provided on the back surface of the embossed plate, and the maximum height of the convex portion was 25 μm.

  A transparent homopolypropylene resin melt-extruded on the back surface of the colored thermoplastic resin sheet thus obtained was provided to a layer thickness of 80 μm, solidified with a cooling roll, and then the transparent homopolypropylene resin was similarly applied to the surface. The resin was provided so as to have a layer thickness of 80 μm.

  Thereafter, as a surface protective layer on the surface side, a coating material obtained by mixing 100 parts by weight of a silicone-modified acrylic urethane resin with 50 parts by weight of polydimethylsiloxane propirol and 50 parts by weight of a hexamethylene diisoisocyanate curing agent is used. The coating amount after drying was 8 g / m 2 and dried.

  After that, as the adhesive layer on the back side, a urethane resin adhesive ("Siavine SH101" manufactured by Toyo Ink Manufacturing Co., Ltd.) was used, and this was applied so that the coating amount after drying was 30 g / m2. And dried to prepare a decorative sheet of the present invention.

  When the obtained decorative sheet is cut into a predetermined size and pasted on a glass plate, it has a specularity and depth with a sense of unevenness inside, and a design with a sense of shine, from both sides It became.

  The decorative sheet of the present invention is affixed to a glass window or the like, and provides an elegant design expression from both the inside and outside of the window. Is available.

It is explanatory drawing of the cross section which shows the structure of the decorative sheet of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Colored thermoplastic resin layer 2, 2 '... Transparent or translucent thermoplastic resin layer 3 ... Surface protective layer 4 ... Adhesive layer

Claims (3)

  A decorative sheet comprising a transparent or semi-transparent resin layer on the front and back surfaces of a colored thermoplastic resin sheet provided with irregularities on the surface and irregularities following the irregularities on the back surface.   The decorative sheet according to claim 1, wherein a transparent or translucent surface protective layer is provided on the surface of the decorative sheet.   The decorative sheet according to claim 1, wherein a transparent or translucent adhesive layer is provided on the back surface of the decorative sheet.

Images