JP3057970B2 - Laminated decorative sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated decorative sheet, which is used as a decorative material for furniture members, fittings, construction materials and the like, and for surface decoration of weak electric products such as refrigerators and television cabinets.

[0002]

2. Description of the Related Art A laminated decorative sheet is made of wood, plywood, laminated wood, or particle board as a material to be bonded.
It is used by attaching it to a plate-like material such as a hard board or other wood-based material. The joined product is further subjected to V-cut processing and assembled into a box or cabinet. In addition, as a material to be bonded, it has a complicated shape, that is, a cutting process of wood or a processed wood product, or a polygonal column having a polygonal cross section or a curved column having a curved cross section formed by extrusion molding with plastic,
Used for products that are wrapped according to their shape. This laminated decorative sheet is provided with a printing ink layer on an opaque PVC film as a base sheet,
As a protective sheet, a sheet formed by laminating transparent PVC films by heat bonding has been used. By laminating, the printing ink provided on the base film is protected by a protective film, and at the same time, the thickness is increased to increase the strength. The PVC film has some elongation, so it is suitable for V-cut processing and lapping processing Can be provided. Further, the PVC film has an advantage that various suitability such as printing suitability, laminating suitability, embossing suitability and the like are good. There is also a reinforced sheet obtained by applying resin processing to paper, or a sheet obtained by bonding a PVC film to a reinforced sheet. However, paper-based materials have insufficient strength and lack flexibility, so processing such as V-cut is not possible. When applied, it was easily broken, so it was practically unused.

[0003]

However, PVC film generates environmental problems by generating chlorine gas and plasticizer odor during the combustion process, and PVC film has poor weather resistance. However, there is a problem that the stain resistance is poor. Advantages of the above-mentioned PVC film, especially V-cut processing, a substitute material having suitability for lapping processing is required,
The present invention provides a laminated decorative sheet as a substitute material.

[0004]

The present invention is a laminated decorative sheet in which a protective sheet is directly laminated on a printing ink layer surface of a substrate sheet provided with a printing ink layer on the entire surface, wherein the substrate sheet is opaque. The laminated decorative sheet is a polyolefin resin film, wherein the protective sheet is a transparent ethylene vinyl alcohol copolymer resin film, and the printing ink layer is a urethane resin ink.

[0005] The present invention also relates to a laminated cosmetic in which a protective sheet is directly laminated on the surface of a heat-adhesive anchor layer of a substrate sheet provided with a printing ink layer and a heat-adhesive anchor layer provided on the entire surface of the printing ink layer. A sheet, wherein the base sheet is an opaque polyolefin-based resin film, the protective sheet is a transparent ethylene-vinyl alcohol copolymer-based resin film, and the heat-adhesive anchor layer is a urethane-based resin paint or printing. A decorative sheet characterized by being ink.

The present invention is also the laminated decorative sheet according to claim 1 or 2, wherein the protective sheet is embossed to form a group of depressions.

[0007] The present invention is also the laminated decorative sheet according to claim 3, wherein the recessed group is filled with a coloring ink.

The present invention will be described in more detail. A polyolefin-based resin film as a base sheet is a material that has strength, moderate elongation, and is inexpensive. More importantly, the molecule does not contain chlorine groups.
Also, no plasticizer is contained in the film. The reason why the opaque polyolefin resin film is used is to provide concealing properties and to prevent the printing pattern of the printing ink layer of the polyolefin resin film from being affected by the color of the material to be bonded. To make the polyolefin-based resin film opaque, a coloring pigment and a filler (calcium carbonate, magnesium carbonate, silica, etc.) are added. It also helps printability and adhesion. Opaque is usually white, but may not be white depending on the print pattern. Even when the olefin-based resin film is foamed, it can be made opaque (seen in some synthetic papers). The polyolefin-based resin film is obtained by forming a polyolefin-based resin into a film. The polyolefin resin is a polyethylene resin such as a homopolymer of ethylene, an ethylene- (meth) acrylate copolymer, an ethylene-propylene copolymer, an ethylene-butene-1 copolymer, etc. Examples of the polypropylene resin include polypropylene resins such as propylene homopolymer, propylene-ethylene copolymer, and propylene-butene-1 copolymer.

As the protective sheet, an ethylene vinyl alcohol copolymer resin film is used. Ethylene vinyl alcohol copolymer resin is a crystalline polymer which is a random copolymer of ethylene and vinyl alcohol. Transparency, weather resistance and stain resistance are superior to PVC resin films. More importantly, the molecule does not contain chlorine groups.

[0010] The surface of the polyolefin resin film or ethylene vinyl alcohol copolymer resin film is subjected to a corona treatment, an ozone treatment, or the like to improve the adhesiveness with a printing ink, a paint, or an adhesive. It may be activated.

The printing ink layer is provided on the entire surface of the opaque polyolefin resin film. As the printing ink, an ink made into an ink using a urethane-based resin, an acrylic resin, or the like is preferable.

Heat is applied to both the ethylene vinyl alcohol copolymer resin film and the olefin resin film provided with the printing ink layer by applying heat to laminate them by heat fusion. For this purpose, the printing ink itself must have thermal adhesiveness to the ethylene-vinyl alcohol copolymer resin film, and among the above-mentioned inks, urethane-based resin inks were preferred.

When the printing ink layer is partially provided,
It is necessary to provide a heat-adhesive anchor layer. The heat-adhesive anchor layer is for thermally bonding the polyolefin-based resin film or the printing ink layer on the polyolefin-based resin film to the ethylene-vinyl alcohol copolymer-based resin film. It is a paint or printing ink such as a urethane resin or an acrylic resin having an adhesive property, and a synthetic resin containing no chlorine atom in the molecule is preferable. The heat-adhesive anchor layer can be provided simultaneously with the printing layer on the same printing machine.

In order to further improve the design, it is preferable to emboss the surface of the ethylene-vinyl alcohol copolymer resin film to form a group of depressions such as a conduit pattern. For example, it can be obtained by applying heat, laminating and heat-sealing and laminating, and passing an embossing roll (cooling water is circulated inside the roll) while the laminated film is still hot. Further, the concave group may be filled with a coloring ink (wiping process), and a transparent paint may be applied or printed on the entire surface.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

Example 1 FIG. 1 is a sectional view of a laminated decorative sheet according to Example 1. As the base sheet 11, a 100 μm-thick “# 041” manufactured by Riken Vinyl Industry Co., Ltd., in which a color pigment was mixed into propylene resin, which is an opaque olefin-based resin film, was used. A wood grain printing ink layer 12 was printed on the entire surface of the base material sheet 11 using a gravure printing machine using a urethane resin ink “Lamistar” manufactured by Toyo Ink Mfg. Co., Ltd. As the protective sheet 14, a 15 μm thick “Eval HF film” manufactured by Kuraray Co., Ltd., which is a transparent ethylene vinyl alcohol copolymer resin film, was used.

The protective sheet 14 and the printing ink layer 12 of the base sheet 11 provided with the printing ink layer 12 are bonded by a hot bonding embossing machine at a bonding temperature of 110 ° C. to 1 ° C.
20 ° C, bonding time 40 seconds, bonding pressure 2kg
Under the condition of / cm, heat bonding was performed, and at the same time, embossing was performed to form a concave group 15 having a pipe pattern on the surface of the protective sheet 14.

The laminated decorative sheet 10 having the obtained recessed group 15 is a printed wood-grain pattern and a conduit-shaped recessed group 15.
In combination, the design was excellent. The printing ink layer 12 on the base material 11 and the ethylene-vinyl alcohol copolymer resin film were firmly adhered to each other, and the adhesive strength was 3.5 kg / 25 mm or more.

As shown in FIG. 3, the laminated decorative sheet 10 is bonded to a plywood 21 having a thickness of 6 mm and an aqueous urethane resin adhesive to form a laminated decorative sheet-laminated plywood 20, and the laminated decorative sheet 10 is left. , The right-angled triangular portion 22 of the plywood 21 is removed and the oblique straight line portions 23, 2
3 'were bonded together using the aqueous urethane resin adhesive 24 to produce a V-cut product 30 as shown in FIG.

No whitening or cracking was observed in the portion 31 of the V-cut product 30 bent at a right angle.
Further, since the laminated decorative sheet 10 does not use a film containing a chlorine group in a molecule, no chlorine gas is generated during combustion.

Example 2 FIG. 2 is a sectional view of a laminated decorative sheet according to Example 2. As the base sheet, “Yupo KPK-80” manufactured by Oji Yuka Synthetic Paper Co., Ltd. having a thickness of 80 μm and made of polypropylene resin was used as the opaque polyolefin film 11. The printing ink layer 12 is printed on the entire surface with a gravure printing machine using a urethane-based resin ink “Lamistar” manufactured by Toyo Ink Mfg. Co., Ltd.
A urethane anchor material “V-80” manufactured by Toyo Ink Co., Ltd. was continuously printed to a thickness of 5 μm on a gravure plate of μm. As the protective sheet 14, as in Example 1, a transparent ethylene-vinyl alcohol copolymer resin film having a thickness of 15
A μm “EVAL HF film” manufactured by Kuraray Co., Ltd. was used.

The protective sheet 14 and the printing ink layer 12 of the base sheet 11 provided with the printing ink layer 12 are bonded by a hot bonding embossing machine at a bonding temperature of 150 ° C. and a bonding time of 15 seconds. Thermal bonding was performed under a pressure of 2 kg / cm. Simultaneously, embossing was performed to form a group of recesses 15 having a duct pattern on the surface of the ethylene vinyl alcohol copolymer resin film 14. Next, the surface of the dent group 15 is coated with a black colored ink, and the entire surface is squeezed with a doctor. The concave ink of the dent group 15 is filled with the coloring ink 17, and a transparent paint 16 of acrylic urethane resin is further applied to the entire surface. Applied.

The obtained laminated decorative sheet 10 having the group of depressions 15 was excellent in design because the printed grain pattern and the group of black conduit patterns were combined. or,
The printing ink layer 12 on the base material 11 and the ethylene-vinyl alcohol copolymer-based resin film are firmly adhered to each other by the thermo-adhesive anchor layer.
It was 5 kg / 25 mm or more.

Using this laminated decorative sheet 10, a V-cut product 30 as shown in FIG.

No whitening or cracking was observed in the portion 31 of the V-cut product 30 bent at a right angle.
Moreover, the laminated decorative sheet 10 does not generate chlorine gas during combustion.

[0026]

Since the laminated decorative sheet of the present invention has the above-described structure, the base material, the heat-adhesive anchor layer, and the ethylene-vinyl alcohol copolymer resin film, which are polyolefin resin films, have chlorine in the resin. Since it does not contain atoms, it does not emit chlorine gas during the combustion treatment and does not smell the plasticizer. Since the base material is a polyolefin-based resin film, it has moderate softness (flexibility), is inexpensive, and has a laminated cosmetic material laminated with an ethylene-vinyl alcohol copolymer-based resin film. Cutting and lapping) were good. As the protective sheet is laminated with an ethylene vinyl alcohol copolymer resin film, it has good transparency, weather resistance and stain resistance. In addition, by embossing the surface or by filling the embossed dents with colored ink, an excellent design feeling was obtained in combination with the printed pattern.

[Brief description of the drawings]

FIG. 1 is a sectional view of a laminated decorative sheet according to Example 1 of the present invention.

FIG. 2 is a sectional view of a laminated decorative sheet according to Example 2 of the present invention.

FIG. 3 is a cross-sectional view of a laminated decorative sheet-attached plywood in which a laminated decorative sheet and a plywood are adhered in an embodiment of the present invention.

FIG. 4 is a sectional view of a V-cut product obtained by subjecting the laminated decorative sheet-attached plywood of FIG. 3 to V-cut processing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Laminated decorative sheet 11 ... Base sheet 12 ... Printing ink layer 13 ... Heat-adhesive anchor layer 14 ... Protective sheet 15 ... Dump group 16 ... Transparent paint 17 ... Colored ink 20 ... Laminated decorative sheet pasted plywood 21 ... Plywood 22 ... Right triangle part 23,23 '... Slanted straight part 24 ... Adhesive 30 ... V-cut product 31 ... Part bent at right angle

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-91243 (JP, A) JP-A-62-148752 (JP, A) JP-A-54-123166 (JP, A) JP-A-2- 128843 (JP, A) JP-A-1-123742 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B32B 1/00-35/00

Claims (4)

(57) [Claims] 1. A laminated decorative sheet in which a protective sheet is directly laminated on a printing ink layer surface of a substrate sheet provided with a printing ink layer on the entire surface, wherein the substrate sheet is an opaque polyolefin resin film, A laminated decorative sheet, wherein the protective sheet is a transparent ethylene vinyl alcohol copolymer resin film, and the printing ink layer is a urethane resin ink. 2. A laminated decorative sheet in which a protective sheet is directly laminated on the surface of a heat-adhesive anchor layer of a substrate sheet provided with a printing ink layer and a heat-adhesive anchor layer provided on the entire surface of the printing ink layer. The base sheet is an opaque polyolefin-based resin film, the protective sheet is a transparent ethylene-vinyl alcohol copolymer-based resin film, and the heat-adhesive anchor layer is a urethane-based resin paint or printing ink. A decorative sheet, characterized in that: 3. The protection sheet according to claim 1, wherein the protection sheet is embossed to form a group of depressions.
The laminated decorative sheet according to the above. 4. The laminated decorative sheet according to claim 3, wherein the concave group is filled with a coloring ink.