JP3123292B2 - 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 bonding it to a plate-like material such as a hard board or other wood-based material with an adhesive. The bonded product is further subjected to V-cut processing to assemble a box or cabinet. In addition, as a material to be bonded, a material having a complicated shape, that is, a wood or a processed wood product is subjected to a cutting process, or a polygonal column having a polygonal cross section or a curved column having a cross section curved shape is formed by extrusion molding with plastic. Some products are wrapped according to their shape. The laminated decorative sheet of the V-cut part or the wrapped part of the laminated decorative sheet with sharp wrapped parts has cracks,
To prevent this phenomenon, it may be whitened or cut off.To prevent this phenomenon, use a laminated decorative sheet in which a printing layer is provided with a printing ink on an opaque PVC film as a base film and a transparent PVC film is thermally laminated as a protective film. I have been. 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. Furthermore, PVC films have been used because of their good properties such as printability, lamination suitability and embossability. There is also a reinforced sheet obtained by applying resin processing to paper or a sheet obtained by laminating a PVC film on a reinforced sheet. However, paper-based materials have insufficient strength (easy to tear) and have not been used substantially. .

[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 due to oozing out of the plasticizer is poor. The advantages of the above-mentioned PVC film, particularly a substitute material having suitability for V-cut processing and lapping processing are required, but the present invention provides a laminated decorative sheet as the substitute material.

[0004]

SUMMARY OF THE INVENTION The present invention is a laminated decorative sheet in which a protective sheet is thermally bonded and 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. A polyolefin resin film, wherein the protective film is a transparent acrylic resin film, and the printing ink layer is a urethane resin ink.
A laminated decorative sheet, characterized in that that.

[0005] The present invention also provides a laminated decorative sheet comprising a printing ink layer and a protective sheet heat-bonded and laminated on the surface of the thermo-adhesive anchor layer of a base sheet having a thermo-adhesive anchor material layer provided on the entire surface of the printing ink layer. there are, the base sheet is opaque polyolefin resin film, said protective film is a transparent acrylic resin film, said thermal bonding
The anchor material layer is made of urethane resin paint or printing ink.
It is a laminated decorative sheet characterized by the following.

[0006] The present invention is also a laminated decorative sheet, characterized in that the acrylic decorative film of the laminated decorative sheet is embossed.

[0007] The present invention is also a laminated decorative sheet, wherein the embossed surface of the acrylic resin film is subjected to wiping.

Since the present invention has taken the above measures, the above problems have been solved, and a laminated decorative sheet having the advantages of a laminated PVC film has been obtained.

The present invention will be described in more detail. An olefin-based resin film as a base film 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 use of an opaque olefin-based resin film provides concealment,
This is because the printing pattern of the printing ink layer of the olefin resin film is not affected by the color of the material to be bonded. To make the olefin 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 olefin resin film is obtained by forming an olefin resin into a film. Olefin-based resins include ethylene-based homopolymers of ethylene, ethylene- (meth) acrylate copolymers,
Ethylene-propylene copolymer, ethylene-butene-1
An ethylene-based resin such as a copolymer, and a propylene-based resin is a propylene-based resin such as a homopolymer of polypropylene, a propylene-ethylene copolymer, and a propylene-butene-1 copolymer.

An acrylic resin film as a protective film is a transparent film used to protect a printing ink layer. It has better weather resistance, cold resistance, heat resistance and stain resistance than PVC resin film. More importantly, the molecule does not contain chlorine groups. It was also embossed. The acrylic resin used as the acrylic resin film is mainly composed of acrylic acid (including methacrylic acid) and other monomers such as acrylic resin and styrene obtained by polymerizing acrylic acid ester, acrylamide, and acrylonitrile, which are derivatives thereof. And an acrylic copolymer resin.

The surface of the polyolefin resin film or the acrylic 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 to activate the film surface. May be.

The printing ink layer is provided on the entire surface of the opaque olefin 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.

An acrylic resin film and a printing ink layer of an olefin resin film provided with a printing ink layer are laminated by applying heat to both films and heat-sealed.
For this purpose, the printing ink itself needs to have a thermal adhesive property with the acrylic resin film, and among the inks, a urethane resin ink was preferred.

When the printing ink layer is provided not partially but entirely, it is necessary to provide a heat-adhesive anchor layer.
The thermal adhesive anchor material is for thermally bonding the acrylic resin film to the olefin resin film or the printing ink layer on the olefin resin film.
It is a paint or printing ink such as a urethane-based resin or an acrylic resin having a thermal adhesive property at a temperature of 00 ° C. to 230 ° C. 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 enhance the design, it is preferable to emboss (irregularities) on the acrylic resin film surface. Embossing is performed simultaneously with bonding by applying heat to the acrylic film. Further, ink may be filled in the concave portion of the emboss (wiping process), and a transparent paint may be applied or printed on the entire surface.

The laminated decorative sheet is bonded to the material to be bonded using an adhesive by a bonding machine or a wrapping machine, and is subjected to V-cut processing if necessary.

[0017]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

<Example 1> As shown in FIG. 1, the base sheet was a 100 μm-thick Riken Vinyl Kogyo Co., Ltd. film having a color pigment containing propylene resin as an opaque olefin resin film 11. 041 "was used. The printing ink layer 12 was provided by printing a wood grain pattern over the entire surface using a urethane resin ink “Lamistar” manufactured by Toyo Ink Mfg. Co., Ltd. using a gravure printing machine. The protective film was a transparent acrylic resin film 14, and "Acryprene HBS-001" manufactured by Mitsubishi Rayon Co., Ltd. having a thickness of 50 μm was used. The printing surface and the acrylic resin film 14 were thermally laminated by a thermal laminating embossing machine under the conditions of a laminating temperature of 110 ° C. to 120 ° C., a laminating time of 40 seconds, and a laminating pressure of 2 kg / cm. At the same time, an emboss 15 having a conduit pattern was applied to the surface of the acrylic resin film 14. The obtained embossed laminated decorative sheet 10 was excellent in design feeling because the printed wood grain pattern and the embossed pipe pattern were combined.

As shown in FIG. 3, the laminated decorative sheet 10 is laminated with a plate-shaped 6 mm thick plywood 21 using an aqueous urethane resin adhesive to form a laminated decorative sheet laminated plywood 20.
, Leaving the laminated decorative sheet 10, removing the right-angled triangular portion 22 of the plywood 20, and attaching the hatched portions 23, 23 ′ together with the aqueous urethane resin adhesive 24,
A V-cut processed product 30 as shown in FIG. 4 was produced.

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> As shown in FIG. 1, the base sheet was made of an opaque polyolefin-based film 11 made of polypropylene resin and having a thickness of 80 μm, manufactured by Oji Yuka Synthetic Paper Co., Ltd. “Yupo KPK-80”. used. The printing ink layer 12 is coated with a gravure printing machine by Toyo Ink Manufacturing Co., Ltd.
A wood pattern was printed on the entire surface using a urethane resin ink "Ramister" manufactured by the Company. In the same printing press, a urethane-based anchor material “V-80” manufactured by Toyo Ink Co., Ltd. having a thickness of 5 μm was used as a gravure printing plate having a plate depth of 70 μm as the thermal adhesive anchor layer 13.
m was printed following the grain pattern. As the protective film, “Acryprene HBS-001” manufactured by Mitsubishi Rayon and having a thickness of 50 μm, which is a transparent acrylic resin film 14, was used. Laminating temperature 15 with heat laminating embossing machine
0 degree C, lamination time 15 seconds, lamination pressure 2kg /
The printing surface and the acrylic resin film 14 were thermally laminated under the condition of cm. At the same time, an emboss 15 having a conduit pattern was applied to the surface of the acrylic resin film 14. Next, a black urethane-based resin ink is applied on the embossed surface 15 and the entire surface is squeezed with a doctor-like material.
5 was filled with ink, and an acrylic urethane resin transparent paint was applied to the entire surface. The obtained embossed laminated decorative sheet 10 was excellent in design feeling because the printed grain pattern and the embossed black pipe pattern were combined. Further, the printing ink layer on the base material 11 and the acrylic resin film were firmly adhered to each other by the thermal adhesive anchor layer, and the adhesive strength was 3.5 kg / 25 mm or more.

The laminated decorative sheet 10 is laminated with a plywood 21 having a thickness of 6 mm and an aqueous urethane-based resin adhesive 24 to form a laminated decorative sheet laminated plywood 20, and the laminated decorative sheet 10 is left as shown in FIG. Then, the right-angled triangular portion 22 of the plywood 20 is removed, and the hatched portions 23 and 23 'are bonded together with the aqueous urethane resin adhesive 24, as shown in FIG.
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.

[0024]

As described above, the laminated decorative sheet of the present invention does not contain chlorine atoms in the resin for the base material, the heat-adhesive anchor layer, and the acrylic resin film, both of which are olefin resin films. Therefore, there is no chlorine gas and no smell of plasticizer during the combustion process. Since the base material is a polyolefin-based resin film, it has moderate softness (flexibility), is inexpensive, and is suitable for secondary processing (V-cut, wrapping). Processing) was good. In addition, since the surface is embossed or embossed, an excellent design feeling can be obtained by combining it with a 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 cross-sectional view of a V-cut product 30 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 ... Substrate 12 ... Printing ink layer 13 ... Heat-adhesive anchor layer 14 ... Protective film layer 20 ... Laminated decorative sheet pasted plywood 21 ... Plywood 22 ... Right angle triangular part 23,23 '... Shaded part 24 ... Adhesive 30 V-cut product 31 Part bent at right angle

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (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 heat-bonded and 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, The protective film is a transparent acrylic resin film, and the printing ink layer is
A laminated decorative sheet characterized by being a urethane resin ink . 2. A laminated decorative sheet comprising a printing ink layer and a protective sheet heat-bonded and laminated on the surface of the heat-adhesive anchor layer of a base sheet having a heat-adhesive anchor material layer provided on the entire surface of the printing ink layer, The base sheet is an opaque polyolefin resin film, the protective film is a transparent acrylic resin film, and the heat-adhesive anchor material layer
A laminated decorative sheet characterized by being a urethane resin paint or printing ink . 3. The laminated decorative sheet according to claim 1, wherein an emboss is applied to the acrylic resin film of the laminated decorative sheet. 4. The laminated decorative sheet according to claim 3, wherein the embossed surface of the acrylic resin film is subjected to a wiping process.