JPH0781006A - Decorative sheet - Google Patents

Abstract

PURPOSE:To provide a decorative sheet for furnishings which can be incinerated, as a base material a paper having a property comprising equal to vinyl chloride which has been used hitherto. CONSTITUTION:To the rear face of a printing paper 1 having a weight of about 23-200g/m<2> coated with a finish coat layer 2 by a synthetic resin such as a urethane resin having flexibility and excellent durability, an acrylic resin, a DAP resin, and a polyester resin, a backing paper 4 having a weight about the same as the surface is stuck through a flexible and non-water permeating skin film such as the urethane resin, the acrylic resin, the DAP resin, and the polyester resin. As the printing paper 1 and the backing paper 4 are stuck together by a non-water permeating synthetic resin skin film coating, an impermeable layer is formed as an intermediate layer, so that a decorative sheet does not swell even when it is to be stuck to a woody base plate by using a water-based adhesive and it can be used in the same way as a conventional vinyl chloride film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a decorative sheet on which a grain-like pattern is printed in order to cover a base material such as plywood, laminated veneer lumber, laminated wood, particle board, and MDF as a structural material. Regarding

[0002]

2. Description of the Related Art Conventionally, natural wood has been used as a construction material for buildings such as doors, window frames, rims, and skirting boards. In recent years, however, the design and durability of the surface have been improved, Furthermore, for easy maintenance, plywood, laminated veneer lumber, laminated wood,
Artificial materials in which a particle board, MDF or the like is used as a base material and the surface of the base material is covered with a vinyl chloride resin film (vinyl chloride film) on which a wood grain pattern is printed have come into wide use.

[0003]

However, this vinyl chloride resin is not easy to recycle like paper and wood,
There is a movement to limit the use of chlorine gas, which is harmful to the human body when burned. Particularly, due to the recent increase in demand for rebuilding houses, disposal of residues generated during the pasting process of PVC wallpaper and PVC film, which occur during rebuilding, has become a serious problem.

For this reason, attempts have been made to develop a decorative sheet based on paper as an ecological sheet that replaces the vinyl chloride film. However, abrasion resistance, stain resistance, discoloration, aging resistance,
In terms of surface properties such as water resistance and printability, and tearability, strength, and workability for bending and folding such as expansion and contraction with water-based adhesives, alternative sheets for PVC films have not been completed yet.

It is an object of the present invention to provide an incinerable decorative sheet for sculpture, which is made of paper and has the same characteristics as those of conventionally used vinyl chloride films.

[0006]

According to the present invention, a flexible backing of a printing paper having a weight of about 23 to 200 g / m ² coated with an overcoat layer made of a synthetic resin having high flexibility is used. The intended decorative sheet could be obtained by bonding a backing paper having the same weight as the surface via a water-impermeable film.

As the paper used for the decorative sheet of the present invention, a base paper on which various patterns are gravure-printed or offset-printed is used. The thicker the thick paper, the clearer the printing and the better the appearance, but if it is too thin, it becomes difficult to bond the paper. On the other hand, if the thickness is too thick, the printing is unclear, and when pasted together, peeling between sheets and delamination are likely to occur, and the weight is 23 to 200 g /
m ^2, preferably it is necessary to use a base paper of 30 to 80 g / m ^2.

Further, as the overcoat layer applied to the surface of the printing paper, urethane resin, acrylic resin, dup resin,
It is formed by applying a coating material made of a synthetic resin having durability and flexibility such as polyester resin and having excellent permeability to paper at a coating amount of ²⁰ to 100 g / m ^{2 on} a dry base.

The backing paper adhered to the back surface of the printing paper is basically the same in weight and material as the base paper of the printing paper used for the front surface. In addition, it is preferable to use unbleached base paper having good permeability in order to improve adhesion with a water-impermeable film, or to use a base paper in which a resin is mixed in advance to improve the inter-paper strength.

The film formed between the printing paper and the backing paper must be flexible and impermeable to water, and a liquid resin adhesive is applied to the paper. The formed film or a film-like film having a thickness of 5 to 100 μm can be used. When forming the film, it is preferable that the film has good penetrability into paper and excellent compatibility with the synthetic resin forming the top coating material of the printing paper.
A urethane resin, an acrylic resin, a dup resin, a polyester resin, or the like can be used as the resin therefor.
It suffices that the film be formed continuously, and the thickness thereof has no particular problem. When the adhesive is applied to form the film, the amount of the adhesive applied is preferably about 50% of the weight of the base paper on a dry basis.

In this decorative sheet, the adhesive between the printing paper and the backing paper is obtained by applying an adhesive to the back surface of the printing paper and then passing through a dryer to volatilize the solvent component or to have a water-impermeable film having an adhesive property. After the interposing, the backing paper is overlapped and passed through a heating roll press to be bonded together.

[0012]

The decorative sheet of the present invention has a feature that the base material is made of paper and can be incinerated. Moreover, in terms of flexibility, it is inferior to PVC film, but wear resistance,
It is coated on the base material in terms of surface performance such as stain resistance, discoloration, aging resistance, water resistance, and printability, and tearability, strength, and workability for bending and folding such as expansion and contraction with an aqueous adhesive. It has sufficient properties as a decorative sheet for construction materials.

[0013]

EXAMPLE FIG. 1 shows a cross-sectional structure of a decorative sheet manufactured in this example. In the figure, 1 is a printing paper, 2 is an overcoat layer, 3 is a flexible water-impermeable layer, and 4 is a backing paper.

Example 1 A printing paper 1 in which a wood pattern is printed on a base paper having a weight of 30 g / m ^2.
70 g / m ² of a transparent urethane resin paint was applied to the surface of the above to form a top coat layer 2 to obtain a printing paper. Then, a solvent type urethane resin adhesive is applied to the back surface of the printing paper 1 at 15 g /
m ^{2 was} applied and passed through a drier to volatilize the solvent component to form a flexible impermeable layer 3. Subsequently, the unbleached base paper having a weight of 30 g / m ² used for the printing paper 1 is laminated on the flexible water-impermeable layer 3 as the backing paper 4, passed between roll presses and pressed to bond them together. A decorative sheet having a thickness of 0.08 mm was obtained.

After applying a water-soluble emulsion adhesive to the back surface of this decorative sheet, MDF is applied using a lapping machine.
It was attached to a skirting board using as a base material, but it could be attached continuously like a conventional PVC film sheet, and was not torn or wrinkled.

This skirting board has an appearance similar to that of a skirting board coated with a conventional PVC film sheet,
The surface performance was not inferior.

The printed monochromatic pattern on a base paper of Example 2 Weight 50 g / m ^2, and a print paper having an overcoat layer 2 a transparent acrylic resin coating material on the surface thereof was obtained 100 g / m ² coating. Then, a non-bleached base paper having a weight of 50 g / m ² used for the printing paper, with a flexible impermeable layer 3 of a thermoplastic acrylic urethane resin film having a thickness of 0.05 mm being interposed on the back surface of the printing paper. Backing paper 4
As a result, they were passed between heating roll presses at 130 ° C., pressed and bonded to obtain a decorative sheet having an overall thickness of 0.12 mm.

This decorative sheet was attached to a 9 mm-thick plywood via a water-soluble emulsion type adhesive, and then a plurality of V-grooves were formed from the back surface of the plywood by a V-cut machine. Then,
The decorative sheet was bent to the front side and the V groove was adhered to obtain the desired door frame material. This door frame material was not inferior in surface performance and appearance compared to the conventional door frame material coated with a vinyl chloride film sheet.

[0019]

【The invention's effect】

(1) Since two sheets of paper are bonded together with a flexible, water-impermeable synthetic resin film, the decorative sheet has flexibility and strength even though it is made of paper. It can be sufficiently applied by laminating machines such as lapping machines and V-cut machines.

(2) Since the printing paper and the backing paper are bonded together with a water impermeable synthetic resin film paint, a water impermeable layer is formed in the intermediate layer, and a water-based adhesive is used to bond the wood-based substrate. The decorative sheet does not swell when worn, and can be used in the same manner as a conventional vinyl chloride film.

(3) Since paper is the main raw material and vinyl chloride resin is not used, chlorine gas is not generated even when burned. Therefore, the safety of the human body is high even in the case of a fire, and the incineration of the residue of the decorative sheet does not require a special device.

[Brief description of drawings]

FIG. 1 shows a sectional structure of an embodiment of the present invention.

[Explanation of symbols]

 1 Printing Paper 2 Topcoat Layer 3 Flexible Water-Impermeable Layer 4 Backing Paper

Claims (1)

[Claims] 1. A weight of 23 to 200 g / m ² having an overcoat layer formed of a synthetic resin having a flexible surface and good durability.
A decorative sheet in which a backing paper having the same weight as that of the front surface is attached to the back surface of the above printing paper via a flexible and water-impermeable film.