JP2006212909A - Mirror surface-embossing plate and mirror surface-embossed decorative sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mirror surface-embossing plate making dust at the time of lamination or a damage after execution inconspicuous by an applied emboss shape while keeping the design feeling of a mirror surface, and to provide a mirror surface-embossed decorative sheet using it. <P>SOLUTION: The mirror surface-embossing plate is composed of mirror surface parts and embossed parts and is characterized in that the area of the embossed parts is 20-50%, the area of the mirror surface parts is 50-80% and the arithmatic average roughness Ra (JIS B 0601 1994) of the mirror surface parts is 0.01-0.5 μm. The mirror surface-embossing plate is used to make the damage of the mirror surface-embossed decorative sheet inconspicuous by applied embosses while leaving the design of the mirror surface. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mirror surface decorative sheet for use in exterior doors of buildings such as houses, exteriors of terraces, carports, etc., or interiors of transport equipment such as furniture, furniture, vehicles, etc. The present invention relates to a specular embossed decorative sheet having no noticeable scratches, particularly suitable for applications that require weather resistance performance outdoors, such as terraces and carports, and a specular embossed plate used in the production thereof.

  Conventionally, a mirror-embossed plate for mirror-finishing a decorative sheet made of a thermoplastic resin is known in which a core is wrapped with rubber and a tube-shaped metal with a mirror surface is attached to the plate. However, when the surface is mirror-like in this way, dust during manufacturing and scratches after construction are conspicuous.

  In addition, there was a method of applying the mirror surface and the uneven shape one side at a time using the mirror surface roll and the uneven shape imparting plate, but the dust at the time of lamination and the scratches after the construction were conspicuous only with the mirror surface.

Japanese Patent Laid-Open No. 10-151662 JP 2003-103743 A

  The present invention has been made in order to solve such problems, and the problem is that, while maintaining the design feeling of the mirror surface, the embossed shape gives noticeable dust during stacking and scratches after construction. An object of the present invention is to provide a non-specular embossed plate and a specular embossed decorative sheet using the same.

  The present invention has been made to solve the above-mentioned problems. That is, the invention according to claim 1 is an embossed plate comprising a mirror surface portion and an embossed portion, wherein the area of the embossed portion is 20 to 50%, and the mirror surface. The mirror surface embossing plate is characterized in that the area of the portion is 50 to 80%.

  The invention according to claim 2 is the specular embossed plate according to claim 1, wherein the arithmetic average roughness Ra (JIS B0601 1994) of the mirror surface portion is 0.01 to 0.5 μm. .

  The invention according to claim 3 is an embossed decorative sheet formed by laminating a thermoplastic resin layer having an embossed surface, and is embossed by the mirror surface embossed plate according to claim 1 or 2. It is a mirror surface embossing decorative sheet characterized by being given.

  According to the invention of the first aspect, the present invention has an effect that the scratches are not conspicuous by the applied embossing while leaving the design of the mirror surface.

  Further, according to the invention described in claim 2, there is an effect that a specular feeling can be given to the mirror surface portion particularly when embossing is applied to a decorative sheet made of a thermoplastic resin.

  Further, according to the invention described in claim 3, there is an effect that it is possible to obtain a mirror surface embossed decorative sheet in which dust and scratches at the time of lamination and scratches at the time of construction and use are inconspicuous while leaving the design having a mirror surface.

The mirror surface embossing decorative sheet of the present invention will be described below in detail with reference to the drawings.
FIG. 1 shows a cross-sectional structure of an embodiment of a mirror-embossed decorative sheet of the present invention. A pattern layer 3 is provided on the colored thermoplastic resin layer 2, a transparent acrylic resin layer 5 is laminated via a heat sealant 4, and a mirror emboss 6 is applied to the surface. A primer layer 1 may be provided on one surface of the colored thermoplastic resin layer 2 as necessary. Moreover, the shape of the surface of one Example of the mirror surface embossing decorative sheet of this invention is shown in FIG. FIG. 3 shows the external structure of the mirror surface embossing plate of the present invention.

  The mirror surface embossing plate in the present invention is a normal embossing plate, and is composed of copper / peeling layer / ballad copper on an iron core having an aqueous medium circulation heating system pipe inside the plate, engraving method, helio method, pochelle method ( A method of making it corroded by a post-process or laser plate making is generally used, but the Boschel method is most preferable. The pattern used in the negative film for the embossing plate used in the Pochelle method is arbitrary, but it is desirable to perform image processing on a mirror-like surface and a dot-like pattern that is not noticeable of scratches or dust. In this image processing, the area of the embossed portion is 20 to 50% and the area of the mirror surface portion is 50 to 80% and is output to a negative film by a commercially available image setter. When the mirror surface portion is less than 50%, the mirror surface becomes inconspicuous, and when the mirror surface portion exceeds 80%, dust and scratches at the time of manufacturing the mirror surface embossed decorative sheet after embossing become conspicuous.

Further, the arithmetic average roughness Ra (JIS B0601 1994) of the mirror surface portion is set to 0.01 to 0.5 μm. Specifically, a photosensitive solution was applied and baked on a plate in which a negative film for a mirror embossing plate was plated with copper by the Pochelle method. It develops, and the place which becomes a mirror surface part by 25 m of ferric chloride (FeCl ₃ ) is corroded so as to leave a place which becomes a conduit part, and then it is polished and further adjusted for chromium plating. If the arithmetic average roughness Ra is less than 0.01, the specular surface scratches are particularly noticeable when the thermoplastic resin is mirror-embossed, and if it exceeds 0.5 μm, the specularity is lost.

  The kind of the colored thermoplastic resin layer 2 in the mirror-embossed decorative sheet of one embodiment of the present invention is not particularly limited, and for example, any known thermoplastic used as a material for a base sheet for a decorative sheet according to the related art. Resin can be used. Specifically, for example, polyolefin resins such as polyethylene, polypropylene, polybutene, and polymethylpentene, polyolefin resins such as ethylene-vinyl acetate copolymer or a saponified product thereof, and ethylene- (meth) acrylic acid (ester) copolymer. Copolymer, Polyethylene terephthalate, Polybutylene terephthalate, Polyethylene naphthalate, Polyarylate, Polyester resin such as polycarbonate, Acrylic resin such as polymethyl methacrylate, 6-Nylon, 6,6-Nylon, 6,10-Nylon Polyamide resin such as polystyrene resin, AS resin, ABS resin, styrene resin such as cellulose acetate, cellulose derivatives such as nitrocellulose, chlorinated resin such as polyvinyl chloride and polyvinylidene chloride, polyvinyl fluoride, poly Fluorine resins such as vinylidene chloride, polytetrafluoroethylene, ethylene-tetrafluoroethylene copolymer, etc., or two or more types of copolymers or mixtures selected from these, mixtures, composites, laminates, etc. are used. be able to.

  However, in consideration of adaptation to environmental problems that are becoming a social problem in recent years, the use of the above-mentioned chlorine-based resins and fluorine-based resins cannot be said to be very preferable, that is, a resin not containing a halogen element such as chlorine or fluorine, that is, It is preferable to use a non-halogen resin. Above all, in addition to the market price, distribution volume, and ease of procurement, the balance of appropriate flexibility and strength as a base sheet for decorative sheets, processing appropriateness such as bending, cutting and cutting, wear resistance, etc. It is preferable to use a thermoplastic resin selected from polyolefin resins, acrylic resins, and polyester resins from the viewpoint of various physical properties such as surface properties such as solvent resistance and weather resistance.

  When the thickness of the colored thermoplastic resin layer 2 is selected within the range of about 20 to 200 μm, more preferably about 50 to 150 μm, it is suitable in terms of ease of printing and ease of sticking to the decorative board substrate.

  As a colorant used for coloring the colored thermoplastic resin layer 2, it is desirable to use an inorganic pigment having a high refractive index and excellent weather resistance and hiding properties. Specifically, for example, yellow lead, yellow iron oxide, titanium yellow, barium yellow, quinacridone, aureolin, molybdate orange, cadmium red, dial, mars violet, manganese violet, cobalt violet, cobalt blue, cerulean blue, ultramarine blue, Colored pigments such as bitumen, emerald green, chrome vermilion, viridian, iron black, carbon black, etc., for example, titanium oxide (titanium white, titanium white), zinc oxide (zinc white), basic lead carbonate (lead white), base White pigments such as basic lead sulfate, zinc sulfide, lithopone and titanox can be used.

  Above all, it is excellent in concealability and light resistance, and is suitable for decorative sheets in terms of design and color tone. Colored pigments are petals, iron oxide pigments such as yellow iron oxide and iron black, and white pigments are oxidized. It is most desirable to use a titanium pigment. Of course, other concealing or non-concealing inorganic pigments or organic pigments can be used in combination for the purpose of adjusting the color tone, in which case organic pigments such as cobalt blue and carbon black can be used. In the case of a pigment, it is preferable to use a pigment having excellent weather resistance such as a phthalocyanine pigment such as phthalocyanine blue. In addition, extender pigments such as silica, calcium carbonate, and barium sulfate can be used in combination as necessary.

  The pattern layer 3 is made of inorganic pigments such as carbon black, titanium white, zinc white, dial, bitumen, cadmium red, azo pigments, lake pigments, anthraquinone pigments, phthalocyanine pigments, quinacridone pigments, isoindolinone pigments, dioxazine pigments, etc. Metallic pigments such as organic pigments, gold powder, silver powder, copper powder, aluminum powder, bronze powder, pearl luster pigments such as fish scale powder, basic lead carbonate, bismuth oxide oxide, titanium oxide-coated mica, fluorescent pigments, nocturnal pigments, etc. Alternatively, a mixture of two or more selected from these can be used.

If necessary, the primer layer 1 may be provided on the surface of the colored thermoplastic resin layer 2 opposite to the pattern layer 3. 2 component urethane resin to coating of about 5 g / m ² from the coating amount 0.1 after drying by adding appropriate fillers such as silica.

  As the heat sealant 4, it is possible to bond the colored thermoplastic resin layer 2 and the transparent acrylic resin layer 5 by a heat laminating method, and to develop adhesive strength between both layers. Although not particularly limited, a heat-adhesive resin made of an acrylic-polyester-hydrochloric acid / vinyl acetate copolymer resin is particularly suitable. This heat-sealing agent takes advantage of the advantages of acrylic resins and vinyl chloride acetate resins that melt easily by heating and develop adhesive properties, while taking into account the characteristics of polyester resins with little decrease in cohesive force even under heating. It is possible to perform heat laminating with sufficient adhesiveness even under relatively low temperature conditions that do not adversely affect the colored thermoplastic resin layer 2 and the transparent acrylic resin layer 5 such as breakage, elongation, deformation and deterioration. At the same time, the adhesive strength is not lost even under high temperature use conditions in exterior applications and the like, and sufficient peel resistance is maintained.

The acrylic resin, polyester resin, and hydrochloric acid / vinyl acetate copolymer resin in the acrylic-polyester-hydrochloric acid / vinyl acetate copolymer resin were mixed in an acrylic resin ratio of 10 to 60% by weight, polyester resin 10 to 60% by weight, hydrochloric acid / It is preferable to be in the range of 10 to 60% by weight of vinyl acetate copolymer resin, and in particular, in the range of 25 to 35% by weight of acrylic resin, 25 to 35% by weight of polyester resin, and 25 to 35% by weight of hydrochloric acid / vinyl acetate copolymer resin. Is most preferred. The coating amount after drying is preferably about 0.1 to 5 g / m ² in terms of adhesiveness.

  In laminating via the colored thermoplastic resin layer 2 and the transparent acrylic resin layer 5, the heat sealant 4 may be applied in advance to the colored thermoplastic resin layer 2 side, or the transparent acrylic resin layer 5. It may be coated on the side. In addition, when a film-like heat sealant 4 is available, heat lamination can be performed by overlapping the colored thermoplastic resin layer 2 and the transparent acrylic resin layer 5 in a sandwiched manner. . However, in general, heat sealant 4 heat sealant 4 tends to be excellent in adhesion to the surface of the coated thermoplastic resin layer, so that both of the two thermoplastic resin layers to be bonded are bonded. When the heat sealant 4 is previously formed on the surface, the most excellent adhesive strength can be obtained by the heat laminating method.

  Examples of the resin used for the transparent acrylic resin layer 5 include any known acrylonitrile, methacrylonitrile, acrylic acid, methacrylic acid, acrylic acid ester or methacrylic acid ester that have been conventionally used as a surface layer for decorative sheets. Examples thereof include various thermoplastic resins obtained by singly or copolymerizing the above acrylic acid derivative as a main component. Among them, a resin mainly composed of a methacrylic acid ester such as methyl methacrylate, for example, a long-chain alkyl ester of methacrylic acid such as butyl methacrylate, an acrylic acid ester such as methyl acrylate, methacrylic acid or acrylic acid, etc. Add selected monomers as copolymer components or improve the flexibility and thermoformability by graft copolymerization, block copolymerization or blending of rubber components such as styrene-butadiene rubber or methyl methacrylate-butadiene rubber Thus, the resin etc. which are formed can be used conveniently.

  In addition, various additives such as fillers, weather resistant formulations (benzotriazole-based, benzophenone-based, triazine-based UV absorbers, hindered amine light stabilizers, hindered phenol-based antioxidants, etc. may be added as appropriate. The above resins can be used alone or in combination.

A negative film of a mirror-embossed plate with an embossed area of 30% and a mirror-finished area of 70% is prepared by a corrosion method, and this negative film is coated with a sensitizing solution on a copper-plated plate, baked, developed, and conduit The part that becomes the mirror surface part is corroded by 25 μm with ferric chloride (FeCl ₃ ) so as to leave the part to become the part, and then mirror-polished and further chrome-plated to provide a circumference of 940 mm, a surface length of 1400 mm, inside the plate A mirror surface embossing plate of the present invention having a mirror surface portion Ra = 0.01 μm (cutoff: 0.25 μm, measurement length: 1.25 mm) having an aqueous medium circulation heating system pipe was obtained.

As a colored thermoplastic resin 2, a colored polypropylene film having a thickness of 90 μm (“RIVEST TPO” manufactured by Riken Technos Co., Ltd.) is used. A wood grain pattern was printed by a gravure printing method using a two-component curable urethane resin-based ink (“Lamister” manufactured by Toyo Ink Manufacturing Co., Ltd.). Further on this, an acrylic-polyester-vinyl chloride-vinyl acetate resin block copolymer resin (acrylic resin / polyester resin / vinyl chloride-vinyl acetate resin block copolymer resin = 30/30/30) is used as the heat sealant 4. A transparent acrylic resin film having a thermal deformation temperature (JIS K7207) of 77 ° C. having a thickness of 50 μm is applied thereon as a transparent acrylic resin layer 5 by coating to a coating amount of 1.5 g / m ² after drying by a gravure coating method. “HBS006” manufactured by Mitsubishi Rayon Co., Ltd.) is laminated and thermally laminated with the above-mentioned mirror embossing plate at a surface temperature of 140 ° C. and a line speed of 10 m / min. Obtained.

<Comparative Example 1>
In the embossed plate of Example 1, a mirror-embossed decorative sheet was obtained in the same manner as in Example 1 except that the area of the embossed part was 60% and the area of the mirrored part was 40%.

<Comparative example 2>
A mirror surface embossed decorative sheet was obtained in the same manner as in Example 1 except that the embossed plate of Example 1 had an embossed area of 10% and a mirror surface area of 90%.

  When the appearance mirror surface was visually evaluated for the mirror-embossed decorative sheet obtained as described above, no abnormality was found in Example 1, but in Comparative Example 1, the specularity of the conduit pattern portion was not noticeable, but the specularity was high. In Comparative Example 2, the specularity was good, but dust and scratches after the operation were conspicuous.

It is explanatory drawing which shows the structure of the cross section of one Example of the mirror surface embossing decorative sheet of this invention. It is explanatory drawing which shows the shape of the surface of one Example of the mirror surface embossing decorative sheet of this invention. It is explanatory drawing which shows the structure of the external appearance of the mirror surface embossing plate of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Primer layer 2 ... Colored thermoplastic resin layer 3 ... Picture layer 4 ... Heat seal agent 5 ... Transparent acrylic resin layer 6 ... Mirror surface emboss 21 ... Mirror surface part 22 ... Emboss part

Claims (3)

  An embossed plate comprising a mirror surface portion and an embossed portion, wherein the area of the embossed portion is 20 to 50% and the area of the mirror surface portion is 50 to 80%.   The specular embossing plate according to claim 1, wherein the arithmetic average roughness Ra (JIS B0601 1994) of the specular surface portion is 0.01 to 0.5 μm.   An embossed decorative sheet obtained by laminating a thermoplastic resin layer having an embossed surface, wherein the mirror surface is embossed by the specular embossed plate according to claim 1 or 2. Embossed decorative sheet.

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