JPH0724979A - Laminated decorative sheet - Google Patents

Abstract

PURPOSE:To provide a laminated decorative sheet generating no chlorine gas at the time of combustion treatment and enhanced in transparency, weatherability and antistaining properties by using an opaque polyolefinic resin film as a base material sheet and using a transparent non-crystalline polyethylene terephthalate resin film as a protective sheet. CONSTITUTION:A printing ink layer 12 is provided to the entire surface of a base material sheet 11 composed of a polyoefinic resin and a protective sheet 14 is laminated to the surface of the printing ink layer 12 to obtain a laminated decorative sheet 10. Herein, the base material sheet 11 is composed of an opaque polyolefinic resin film and the protective sheet 14 is composed of a transparent non-crystalline polyethylene terephthalate resin film. Further, a thermal adhesive anchor layer 13 can be provided to the entire surface of the printing ink layer 12 between the protective sheet 14 and the printing ink layer 12. Furthermore, embossing is applied to the protective sheet 14 to form cavity groups 15 and these cavity groups 15 can be filled with color ink 17.

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 for surface makeup of furniture materials, fittings, building materials such as construction materials, and light electrical appliances such as refrigerators and TV cabinets.

[0002]

2. Description of the Related Art Laminated decorative sheets are made of wood, plywood, laminated wood, or particle board as a material to be bonded,
It is used by laminating it to a plate-shaped material such as a hardboard such as a hardboard, and the laminated product is further subjected to V-cut processing and assembled into a box or cabinet. Moreover, as a material to be bonded, it has a complicated shape, that is, wood or wood products are subjected to cutting processing, or by plastic extrusion molding into a polygonal columnar body having a polygonal cross section or a curved surface columnar body having a curved cross section,
It is used for products that are lapped 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 transparent PVC film laminated by heat bonding has been used. By stacking, the printing ink provided on the base film is protected by a protective film, and at the same time the thickness is increased to give strength, and the PVC film has some elongation, so it is suitable for V-cut processing and lapping processing. Can have Further, the vinyl chloride film has an advantage that it has various suitability such as printability, laminating suitability and embossing suitability. There is also a reinforced sheet that is resin processed on paper, or a reinforced sheet laminated with a vinyl chloride film, but if paper is used as a base material, the strength is insufficient and it lacks flexibility. Since it is easy to tear when applied, it was not actually used.

[0003]

However, a vinyl chloride film causes environmental problems by generating chlorine gas or a plasticizer odor during combustion treatment, and a vinyl chloride film has poor weather resistance (specially, a vinyl chloride film is improved, Some of them have been modified, but they are expensive), and they have the problem of poor stain resistance. The above-mentioned advantages of the vinyl chloride film, in particular, a substitute material having V-cut processing and lapping processing suitability are demanded.
The present invention provides a laminated decorative sheet as an alternative material.

[0004]

The present invention is a laminated decorative sheet in which a protective sheet is laminated on the surface of a printing ink layer of a substrate sheet having a printing ink layer on the entire surface, and the substrate sheet is an opaque polyolefin-based sheet. A resin film, wherein the protective sheet is a transparent amorphous polyethylene terephthalate resin film, which is a laminated decorative sheet.

In the present invention, a thermal adhesive anchor layer is provided on the entire surface of the printing ink layer between the printing sheet and the protective sheet of the laminated decorative sheet in which the protective sheet is laminated on the surface of the printing ink layer of the base sheet. The laminated decorative sheet according to claim 1, wherein:

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 recesses.

The present invention is also the laminated decorative sheet according to claim 3, wherein the group of recesses is filled with a colored ink.

The present invention will be described in more detail. The polyolefin-based resin film as the base sheet is a material that has strength and appropriate elongation and is inexpensive. More importantly, there are no chlorine groups in the molecule.
Moreover, no plastic material is contained in the film. The reason why the opaque polyolefin resin film is used is that the opaque polyolefin resin film has a concealing property and the printed pattern of the printing ink layer of the polyolefin resin film is not affected by the color of the material to be bonded. To make the polyolefin resin film opaque, a color pigment and a filler (calcium carbonate, magnesium carbonate, silica, etc.) are added. It also has the function of helping printability and adhesiveness. Opaque is usually white, but may not be white depending on the print pattern. Foaming olefinic resin films can also make them opaque (as found in some synthetic papers). The polyolefin resin film is obtained by forming a polyolefin resin into a film. The polyolefin-based resin is a polyethylene-based resin such as ethylene homopolymer, ethylene- (meth) acrylic acid ester copolymer, ethylene-propylene copolymer, ethylene-butene-1 copolymer, etc. The polypropylene-based resin is a polypropylene-based resin such as a propylene homopolymer, a propylene-ethylene copolymer, or a propylene-butene-1 copolymer.

An amorphous polyethylene terephthalate resin film is used as the protective sheet. The non-crystalline polyethylene terephthalate resin refers to a non-crystalline state having a crystallinity of 5% or less, and is usually called A-PET. Excellent transparency, weather resistance and stain resistance compared to PVC resin film. More importantly, there are no chlorine groups in the molecule.

In order to improve the adhesion of the polyolefin resin film and the non-crystalline polyethylene terephthalate resin film to the printing ink, paint and adhesive, the surface of the film is activated by treatment such as corona treatment and ozone treatment. It may be turned into.

The printing ink layer is provided on the entire surface of an opaque polyolefin resin film. As the printing ink, an ink formed by using urethane type, acrylic type, polyester melamine type resin or the like is preferable.

Both the non-crystalline polyethylene terephthalate resin film and the olefin resin film provided with the printing ink layer are heat-bonded and laminated by heat fusion. For this purpose, the printing ink itself must have thermal adhesiveness with the non-crystalline polyethylene terephthalate resin film. Among the inks, urethane-based resin,
Polyester melamine resin ink was good.

When the printing ink layer is partially provided,
It is necessary to provide a thermally 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 amorphous polyethylene terephthalate resin film, and heat-bonded at 100 ° C. to 230 ° C. It is a paint or printing ink such as urethane resin or acrylic resin having properties, 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 enhance the design, it is preferable to emboss the amorphous polyethylene terephthalate resin film surface to form a group of depressions such as a conduit pattern. For example, it can be obtained by applying heat to bond and heat-fusing and laminating, and passing an embossing roll (cooling water is circulating inside the roll) while the laminated film is still hot. Furthermore, the group of dents may be filled with colored ink (wiping process), and a transparent coating may be applied or printed on the entire surface.

[0015]

The invention is explained in more detail in the examples using the figures.

Example 1 FIG. 1 is a sectional view of a laminated decorative sheet in Example 1. As the base material sheet 11, "# 041" manufactured by Riken Vinyl Industry Co., Ltd. having a thickness of 100 μm, in which a color pigment was mixed in a propylene resin which is an opaque olefin resin film, was used. A printing ink layer 12 having a wood grain pattern was printed on the entire surface of the base material sheet 11 using a gravure printing machine using urethane resin ink "Lamister" manufactured by Toyo Ink Mfg. Co., Ltd. As the protective sheet 14, a transparent amorphous polyethylene terephthalate resin film having a thickness of 50 μm, “Crystal Ray” manufactured by Idemitsu Petrochemical Co., Ltd. was used.

The protective sheet 14 and the printing ink layer 12 surface of the substrate sheet 11 provided with the printing ink layer 12 are bonded together by a thermal bonding embossing machine at a bonding temperature of 130 ° C. to 1 ° C.
40 degrees C, bonding time 40 seconds, bonding pressure 2kg
The heat-bonding was performed under the condition of / cm, and at the same time, embossing was performed to form a group of recesses 15 having a conduit pattern on the surface of the protective sheet 14.

The laminated decorative sheet 10 having the obtained dent groups 15 is a dent group 15 having a printed wood pattern and a conduit pattern.
With that, the design was excellent. Further, the printing ink layer 12 on the substrate 11 and the non-crystalline polyethylene terephthalate resin film resin film were firmly adhered, 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 using an aqueous urethane resin adhesive to form a laminated decorative sheet laminated board 20, leaving the laminated decorative sheet 10. , The right-angled triangular portion 22 of the plywood 21 is removed, and the slanted straight portions 23 and 2 are formed.
The 3's were bonded to each other using the water-based urethane-based resin adhesive 24 to make a V-cut processed product 30 as shown in FIG.

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

Example 2 FIG. 2 is a sectional view of a laminated decorative sheet in Example 2. As the opaque polyolefin film 11, “Yupo KPK-80” made of polypropylene resin and having a thickness of 80 μm manufactured by Oji Yuka Synthetic Paper Co., Ltd. was used as the base sheet. The printing ink layer 12 is printed on the entire surface with a gravure printing machine using urethane resin ink "Lamistar" manufactured by Toyo Ink Mfg. Co., Ltd., and a plate depth of 70 is obtained as a thermal adhesive anchor layer 13.
A urethane anchor material "V-80" manufactured by Toyo Ink Co., Ltd. was continuously printed to a thickness of 5 µm using a gravure plate of µm. As in the case of Example 1, the protective sheet 14 is a transparent amorphous polyethylene terephthalate resin film having a thickness of 50.
“Crystaray” manufactured by Idemitsu Petrochemical Co., Ltd. having a size of μm was used.

The protective sheet 14 and the printing ink layer 12 surface of the base material sheet 11 provided with the printing ink layer 12 are bonded together by a thermal bonding embossing machine at a bonding temperature of 150 ° C. and a bonding time of 15 seconds. Heat bonding was performed under a pressure of 2 kg / cm. At the same time, embossing was performed to form a group 15 of recesses having a conduit pattern on the surface of the amorphous polyethylene terephthalate resin film 14. Next, a black coloring ink is applied to the surface of the recess group 15, and the entire surface is squeezed with a doctor to fill the recess of the recess group 15 with the coloring ink 17, and then a transparent coating 16 of acrylic urethane resin is applied to the entire surface. Applied.

The laminated decorative sheet 10 having the group of dents 15 thus obtained had an excellent design feeling because of the printed wood pattern and the group of dents having a black conduit pattern. or,
The printing ink layer 12 on the substrate 11 and the non-crystalline polyethylene terephthalate resin film resin film are firmly adhered to each other by the heat-adhesive anchor layer, and the adhesive strength is 3.
It was 5 kg / 25 mm or more.

Using this laminated decorative sheet 10, a V-cut processed product 30 as shown in FIG. 4 was produced in the same manner as in Example 1.

No whitening or cracking phenomenon was observed in the portion 31 of the V-cut processed product 30 bent at a right angle.
In addition, the laminated decorative sheet 10 does not generate chlorine gas when burned.

[0026]

EFFECT OF THE INVENTION The laminated decorative sheet of the present invention has the above-mentioned constitution. Therefore, the base material which is a polyolefin resin film, the heat-adhesive anchor layer, and the non-crystalline polyethylene terephthalate resin film all contain chlorine atoms in the resin. Since it does not contain chlorine, chlorine gas is not emitted during the combustion process, and the plasticizer odor does not occur. Since the base material is a polyolefin resin film, it has moderate softness (flexibility) and is inexpensive, and the laminated decorative material in which the amorphous polyethylene terephthalate resin film is laminated is suitable for secondary processing (V cut). Processing and lapping) were good. Since a non-crystalline polyethylene terephthalate resin film is laminated as a protective sheet, it has good transparency, weather resistance and stain resistance. Also, by embossing the surface or by filling the embossed dents with colored ink, it was possible to obtain a product with an excellent design in combination with the printed pattern.

[Brief description of drawings]

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

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

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

FIG. 4 is a cross-sectional view of a V-cut processed product obtained by applying V-cut processing to the laminated decorative sheet laminated plate of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Laminated decorative sheet 11 ... Base material sheet 12 ... Printing ink layer 13 ... Thermal adhesive anchor layer 14 ... Protective sheet 15 ... Indentation group 16 ... Transparent paint 17 ... Coloring ink 20 ... Laminated decorative sheet pasting board 21 ... Plywood 22 ... Right triangle part 23, 23 '... Diagonal straight part 24 ... Adhesive 30 ... V-cut processed product 31 ... Part bent at right angle

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B32B 27/36 7421-4F 33/00 7148-4F

Claims (4)

[Claims] 1. A laminated decorative sheet in which a protective sheet is laminated on the surface of a printing ink layer of a substrate sheet having a printing ink layer on the entire surface, wherein the substrate sheet is an opaque polyolefin resin film. Is a laminated non-crystalline polyethylene terephthalate resin film, which is a laminated decorative sheet. 2. A thermal adhesive anchor layer is provided on the entire surface of the printing ink layer between the printing sheet and the protective sheet of the laminated decorative sheet in which the protective sheet is laminated on the surface of the printing ink layer of the base sheet. The laminated decorative sheet according to claim 1. 3. The protective sheet is embossed to form a group of recesses.
The laminated decorative sheet described. 4. The laminated decorative sheet according to claim 3, wherein the group of recesses is filled with a colored ink.