JP3261977B2 - door - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to doors for indoor doors, kitchen doors, storage doors, sliding doors and the like, which have a function of preventing warpage caused by changes in humidity, temperature and the like, and which have high designability. It is.

[0002]

2. Description of the Related Art Heretofore, doors such as indoor doors, kitchen doors, storage doors, and sliding doors have been occasionally warped gradually during use due to humidity and temperature. Therefore, in order to prevent warping, use sheets of the same material on the front and back of these doors so that they do not warp to one side, use a metal support for the frame of the fittings, or use a decorative board on the front and back. For example, a countermeasure such as laminating a sheet having a moisture-proof property on the back surface side has been taken. For example, a method of manufacturing a door in which a vinyl chloride sheet or the like is attached to both sides of a wooden board and the wooden board is attached to both sides of a core made of a wooden base to prevent warpage (Japanese Patent Laid-Open No. 6-272455). In addition, it has been proposed that a base sheet in which paper, a water-resistant resin and paper are laminated is bonded to both surfaces of a wooden base material (Japanese Utility Model Laid-Open No. 3-118634).

[0003] However, when vinyl chloride is used as the above-mentioned sheet substrate, it is possible to prevent warpage to a certain extent, and the design is good, and although it has been put to practical use, the chloride The plasticizer in vinyl bleeds over time, causing bleeding between the adhesive and the adhesive base material, which may cause poor adhesion, and the generation of hydrogen chloride gas during the waste treatment stage and heavy metals in the incineration ash There is a problem of environmental pollution, and in order to enhance the design, the printed vinyl chloride is laminated with a transparent vinyl chloride and then embossed. I have.

[0004] When the above-mentioned base sheet is used on both sides of a wooden base material, the warp can be prevented to a certain extent. The design is imparted by directly printing on the sheet surface or by further attaching a printed decorative coated paper, but the decorative surface has at least a water-resistant resin layer, a printing layer, and two sheets. Because of the need for paper, the cost is undeniable.
In addition, since the configuration is such that the water-resistant resin layer is sandwiched between two sheets of paper, the embossing step is difficult to take, and there is a problem in improving the three-dimensional design.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to provide doors such as indoor doors, kitchen doors, and storage doors.
Provides a low-cost door that has a function to prevent warping even under severe temperature and humidity environmental conditions, has a high three-dimensional design, and does not cause problems such as environmental pollution in waste disposal. Is to do.

[0006]

According to the door of the present invention, a picture layer, an adhesive resin layer and a moisture-proof layer mainly composed of a thermoplastic resin are laminated in this order on a paper base material, and an embossed pattern is formed on the moisture-proof layer. Is provided, and the embossed concave portion is colored.
Furthermore, the paper substrate surface of the decorative sheet provided with a protective layer mainly composed of a synthetic resin on the entire surface is attached to one surface of a wooden substrate, and the other surface is mainly composed of an inter-sheet reinforced paper and a thermoplastic resin. The decorative board obtained by attaching a sheet in which a moisture-proof layer and an inter-sheet reinforcing paper are laminated is attached to both sides of a core material made of a wooden base material.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A decorative board (FIG. 1) used for a door of the present invention has a picture layer 11 and an adhesive resin layer 12 on a paper base 10 on one side of a wooden base 20, and a thermoplastic layer. A moisture-proof layer 13 mainly composed of a resin is laminated in this order, an embossed pattern 14 is provided on the moisture-proof layer, coloring 15 is applied to a concave portion of the embossed pattern, and a protective layer 16 mainly composed of a synthetic resin is formed on the entire surface. A paper base 10 made of a paper-reinforced paper, a moisture-proof layer 13 mainly composed of a thermoplastic resin, and a paper base 1 made of a paper-reinforced paper are adhered to the other surface.
0 is laminated on the sheet.

As the paper base material 10 in the decorative sheet, thin paper of ^{20 to} 50 g / m ² , reinforced paper between papers, single-gloss kraft, and pure white roll can be used.

As the resin binder for the ink of the picture layer 11, cellulose derivatives such as nitrocellulose (including those leaving a part of OH groups of cellulose),
Polyvinyl alcohol, polyvinyl butyral, a mixture thereof with an isocyanate compound, an acrylamide-acrylate copolymer, an ethylene-vinyl acetate copolymer, and the like can be used.

As the adhesive resin layer 12, a vinyl acetate adhesive, a urethane adhesive, an epoxy adhesive,
Polyester adhesives, acrylic adhesives, synthetic rubber adhesives, cellulose adhesives, etc. can be used.

A moisture-proof layer 1 mainly composed of a thermoplastic resin.
3 includes polyethylene, polypropylene, other polyolefins (methylpentene, polybutene, high-pressure ethylene copolymer), polyester, polyamide, styrene resin, ethylene-vinyl acetate copolymer, ethylene-vinyl alcohol copolymer, polyacetal, polyurethane Resin, polyacrylic acid resin, polyacrylonitrile resin, polycarbonate, fluororesin, or the like can be used. However, the use of polyvinyl chloride or polyvinylidene chloride is not possible for the reasons described above. These resins may be in the form of a film or by a method such as extruder coating, and can be laminated via the adhesive resin layer 12 after the pattern 11 is printed on the paper substrate 10.

Further, the embossed pattern 14 can be provided by the embossing step even while heating the resin film surface or immediately after the extruder coating, since the moisture-proof layer is made of a thermoplastic resin.

The binder of the coloring ink 15 to the concave portions of the embossed pattern 14 may be a polyester, acrylic, polyether, or partially saponified ethylene-vinyl acetate copolymer having a hydroxyl group (-OH). A mixture of a polyol prepolymer and an isocyanate compound can be used.

As the protective layer 16, a hydroxyl group (—O
A solution in which a polyol prepolymer such as a polyester-based, acrylic-based, polyether-based, or partially saponified ethylene-vinyl acetate copolymer having H) is mixed with an isocyanate compound is applied and crosslinked and cured. .

As the wood substrate 20, plywood, particle board, medium density fiberboard (MDF), hard board and the like can be used.

[0016]

EXAMPLE 1 A sheet-reinforced paper 10 having a basis weight of 30 g / m ² will be described with reference to FIG.
On one side of (Tama Special Paper Co., Ltd.), a pattern layer 11 is formed with a nitrocellulose-based ink (Toyo Ink Mfg. Co., Ltd.).
Was printed, and a vinyl acetate urethane-based adhesive was applied to a thickness of 3 g / m ² (DRY) on the pattern layer 11 to provide an adhesive resin layer 12. Next, polyethylene and ethylene-
The moisture-proof layer 13 was provided by an extruder coating method with a thickness of 30 μ using a 1: 1 blend of an ethyl acrylate copolymer. Next, an embossed pattern 14 was formed by an embossing process. Next, the embossed concave portions are colored 1 with an ink using a vinyl acetate urethane resin as a binder.
5 was performed. Thereafter, an acrylic urethane resin (UR241 varnish: two-liquid curing type, manufactured by Toyo Ink Mfg. Co., Ltd.) is applied on the entire surface to a thickness of 4 g / m ² (DRY), a protective layer 16 is provided, and a decorative sheet (FIG. 2) I got

Next, the decorative sheet (FIG. 2) is placed on one side of a medium-density fiber reinforced board (MDF) 20 having a thickness of 2.5 mm.
On the other side, the paper-sheet-reinforced paper 10 and the moisture-proof layer 13
A sheet obtained by laminating the sheet and the inter-sheet reinforcing paper 10 with each other with a vinyl acetate emulsion adhesive 17 was obtained to obtain a decorative plate (FIG. 1).

The moisture permeability of the decorative sheet of FIG. 1 (FIG. 2) and the sheet obtained by laminating the inter-sheet reinforced paper 10, the moisture-proof layer 13, and the inter-sheet reinforced paper 10 were measured.
1g / m ² · 24hour and 13g / m ² · 24hou
r. Using two decorative sheets (FIG. 1) to which these two types of sheets were attached, they were attached to both sides of a core material made of a wooden base material to produce a door as the door of the present invention, and an environmental test was performed. As a result, there was almost no warp and the condition was good. In addition, the decorativeness of the decorative sheet, including the three-dimensional effect, of the decorative sheet attached to the surface of the door of the present invention, compared to a commercially available decorative coated paper,
It was very expensive.

[0019]

The door of the present invention has high moisture-proof performance,
Because it has a high design effect including three-dimensional appearance, it does not cause environmental problems at the waste disposal stage even when compared with the conventional door using a decorative sheet based on vinyl chloride. Not too expensive. Further, as compared with a known decorative plate provided with a decorative coated paper of a paper base on which the above-mentioned moisture-proof base sheet is stuck, the design property including the three-dimensional effect and the cost are excellent. Further, since the moisture-proof layer 13 capable of expressing a three-dimensional effect has a high moisture-proof property, the moisture-proof layer 13 also has a function of being less likely to warp even in a severe environment even when used as a door member for the above-mentioned application.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a cross section of a decorative board used for a door of the present invention.

FIG. 2 is an explanatory diagram showing a cross section of a decorative sheet used for a decorative plate in the door of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Paper base material 11 ... Picture layer 12 ... Adhesive resin layer 13 ... Moisture-proof layer 14 ... Embossed pattern 15 ... Colored part of the concave part of embossed pattern 16 ... Protective layer 17 ... Adhesive layer 20 ... Wood base

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B32B 1/00-35/00 E06B 3/00-3/99

Claims (1)

(57) [Claims] An image layer, an adhesive resin layer, and a moisture-proof layer mainly composed of a thermoplastic resin are laminated on a paper base in this order, an emboss pattern is provided on the moisture-proof layer, and a concave portion of the emboss pattern is further provided. Is applied, and the paper base surface of the decorative sheet, which is further provided with a protective layer mainly composed of synthetic resin on the entire surface, is attached to one surface of the wooden base material, and the other surface is coated with a paper-to-paper reinforced paper. A door characterized in that a decorative board formed by attaching a sheet in which a moisture-proof layer mainly composed of a resin and a sheet-reinforced paper are laminated is attached to both sides of a core material made of a wooden base material.