JPS63227337A - Manufacture of thermo-setting resin decorative board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a thermosetting resin decorative board used for, for example, furniture, wall panels, various housing components, and the like.

[Prior art] Conventional thermosetting resin decorative boards are made of, for example, titanium paper or 30
After forming a printing layer on the surface of impregnated paper or the like having a basis weight of about 200 g/m", this is impregnated with a thermosetting resin,
A common method was to stack the obtained impregnated paper on a base material for a decorative laminate, and then subject this stacked body to hot-press molding.

[Problems to be Solved by the Invention] By the way, in the conventional method for manufacturing a thermosetting resin decorative board, it is not only impossible to obtain a relief-like decorative board having a three-dimensional effect, but also a thermosetting resin decorative board cannot be obtained. Since titanium paper and impregnated paper that are impregnated with a synthetic resin are highly impregnated porous papers, minute ink dropouts occur during the printing process to form a printing layer on the surface of these papers, resulting in the printing Not only when the layer is a picture pattern layer, but even when the layer is a solid printing layer, the above-mentioned ink omission is noticeable, and it is not possible to obtain a thermosetting resin decorative board that has a good appearance and a high quality feel. Ta.

In contrast, the method for producing a thermosetting resin decorative board of the present invention is to obtain a relief-like decorative board that has a three-dimensional effect, and not only has excellent three-dimensional properties, but also has colors, patterns, designs, etc. To provide a method for obtaining a thermosetting resin decorative board that exhibits extremely excellent physical properties because the resin layer including the ink layer showing the properties is entirely composed of thermosetting resin. It is something.

[Means for Solving the Problems] The method for producing a thermosetting resin decorative laminate of the present invention is to provide a base paper impregnated with a thermosetting resin and a thermosetting resin on a base material for a decorative laminate. After sequentially overlaying an overlay paper made of transparent or translucent paper impregnated with The adhesive ink layer surface is placed in contact with the overlay paper, and then the laminated body of the decorative laminate base material - base paper - overlay paper - release film is subjected to hot pressure molding,
Furthermore, by peeling and removing the releasable film from the obtained hot-press molded product, a thermosetting resin decorative board to which the thermosetting ink layer in the releasable film has been transferred is obtained.

The base material for a decorative laminate preferably used in the method for manufacturing a thermosetting resin decorative laminate of the present invention having the above structure has a basis weight of 50
~200g/m” kraft paper, e.g. diallyl phthalate resin, phenolic resin.

Melamine resin, unsaturated polyester resin, epoxy resin, or a mixture of two or more of these resins, etc.
The backer paper is made of thermosetting resin-impregnated paper with about 50% impregnation, but other materials include plywood, particle board,
Wooden base materials such as hardboard and insulation board, as well as aluminum plates, etc., are also used. In addition, when the backer paper impregnated with the thermosetting resin is used as a base material for a decorative laminate, a thermosetting resin decorative laminate having a flexible property that allows processing such as curved surface lamination can be obtained.

As a base paper, basis weight 23 to 150g/a+2, especially 35
~100 g/i'' valve seat is preferred; from the viewpoint of the impregnating properties of the impregnating resin, one that is porous, hygroscopic, and has high wet strength is used; Valve seats filled with titanium or other pigments are often used.

In addition, overlay paper is a paper that becomes transparent or translucent when impregnated with thermosetting resin liquid, dried, and cured, and contains no fillers such as titanium oxide or at most 6 to 7% by weight. Impregnated paper with a basis weight of about 15 to 30 g/rn2, preferably
Transparent paper.

Linter paper etc. are used.

The thermosetting resin impregnated into the base paper and overlay paper is, for example, diallyl phthalate resin.

These are phenolic resins, melamine resins, unsaturated polyester resins, or mixed resins of two or more of these resins, and most commonly, the base paper and overlay paper are impregnated with the same thermosetting resin. is normal.

Furthermore, a releasable film comprising a thermosetting ink layer using a thermosetting resin as a vehicle generally has a thickness of 6 to 50 mm.
μ linear polyester.

Release materials include plastic films made of polypropylene, nylon, cellulose, etc., as well as plastic films with internal additions of silica, etc., as well as plastic films with matte finishing such as sandblasting or embossing. A film in which a thermosetting ink layer is formed on a moldable film is used.

The thermosetting ink layer is made of a thermosetting resin such as a thermosetting acrylic emulsion, a melamine resin-added acrylic emulsion, a melamine resin, an unsaturated polyester resin, a two-component curing type acrylic urethane, or a thermosetting polyester urethane. A vehicle made of resin, a pigment,
It is formed from a thermosetting type ink that contains colorants such as dyes, plasticizers, stabilizers, dispersants, fillers, solvents, diluents, etc., and is used as a colorant or as a component of the colorant. , gold powder, silver powder.

Metal pigments such as AL powder, titanium oxide, mica.

A j! When using ink to which Burr pigments such as (OH) It is possible to obtain a metallic or pearl-like decorative board that has a high-quality feel that cannot be obtained by the method for producing resin decorative boards.

In addition, when the thermosetting ink layer is composed of a transparent resin layer formed directly on the surface of the releasable film and a colored ink layer formed on the surface of the transparent resin layer, the resulting thermosetting ink layer Since the surface protective layer in the transparent resin decorative board is formed of the transparent resin layer, a resin decorative board with extremely good surface physical properties can be obtained. It is sufficient for the thickness of the directly formed transparent resin layer to be about 2 to 100 microns. Further, the thermosetting ink layer may be, for example, gravure, gravure offset,
It can be easily formed by printing means such as silk screen or lithographic offset.

The thermosetting process in the method for producing a thermosetting resin decorative board of the present invention is a press forming process using a flat plate press or a roll press, and is generally performed at a temperature of 120 to 150°C.
Pressure 10-20 g/cm'.

Hot pressure molding is performed under conditions of about 10 to 30 minutes, but for example, in the case of high-pressure melamine resin molding,
150℃, 70-100Kg/cm'.

Conditions of about 15 to 20 minutes are used. In addition, it goes without saying that an embossing plate may be used as necessary during the hot-press molding.

[Example] The specific structure of the method for manufacturing a thermosetting resin decorative board of the present invention will be described below with reference to Examples.

Example 1 Phenol resin 7 on core paper (basis weight 150 g/m")
Backer paper impregnated with 0 g/m” and dried.

B±-]] 1 resistance colored titanium paper [manufactured by Koshiiri Co., Ltd.: 80 g/m21, melamine resin [manufactured by Nippon Carbide Co., Ltd.: Nikaresin S-]
260] 80 g/m'' and dried sheet.

(3) Overlay paper impregnated paper with a basis weight of 20 g/m' (manufactured by Daifuku Paper Co., Ltd.) was coated with 30 g/m of the same resin as the melamine resin in the base paper.
Impregnated and dried sheet at a rate of g/m2.

(4) m-type film A thermosetting ink containing a mixed resin of melamine and epoxy as a vehicle [manufactured by Showa Ink Co., Ltd.: r A transparent thermosetting ink layer with a thickness of 50 μm was formed by printing ``ME-T Medium'' on the entire surface, followed by thermosetting ink using a mixed resin of melamine and epoxy as a vehicle and a golden pigment as a coloring agent. By using ink [manufactured by Showa Ink Co., Ltd.: rME-T Gold] to form a striped pattern with a thickness of 5 μm by silk screen printing, the releasability of the thermosetting ink layer is achieved. Got the film.

The L-shaped decorative laminate base material, base paper, and overlay paper are stacked one on top of the other, and the release film is brought into contact with the overlay paper so that the surface of the thermosetting ink layer in the film is in contact with the overlay paper. The resulting hot-press molded product was placed between a pair of hot platens with a mirror plate interposed therebetween, and subjected to hot-pressing at 140°C and 80 kg/cm2 for 20 minutes. Peel off polyethylene terephthalate film, which is a moldable film.

By removing it, the desired product, a thermosetting resin decorative board, was obtained.

The obtained thermosetting resin decorative board has a golden striped pattern with a rich metallic feel, resulting in a melamine resin decorative board with excellent characteristics such as a three-dimensional, relief-like design effect. .

[Operations and Effects of the Invention] The method for producing a thermosetting resin decorative board of the present invention includes a pressing process, which is a molding process of the thermosetting resin decorative board, and a transfer process, which is a process for patterning the resulting decorative board. This is carried out simultaneously to obtain a thermosetting resin decorative board in which all the resin layers including the ink layer serving as the pattern layer in the decorative board are made of thermosetting resin.

Therefore, in the thermosetting resin decorative board obtained by the method of the present invention, the pattern layer made of the thermosetting ink layer is located on the surface side of the transparent or translucent thermosetting resin layer composed of the overlay paper. The effect is that a thermosetting resin decorative board that is a relief-like decorative board that exhibits an excellent three-dimensional effect and has extremely excellent physical properties can be easily and reliably produced.

It is effective.

In addition, in the method for manufacturing a thermosetting resin decorative board of the present invention, when the backer paper impregnated with a thermosetting resin is used as a base material for the decorative board, it has a flexible property that allows it to be applied to curved surfaces. It also has the function and effect that a thermosetting resin decorative board having the following characteristics can be obtained.

Claims (3)

[Claims] (1) A base paper impregnated with a thermosetting resin and an overlay paper made of transparent or translucent paper also impregnated with a thermosetting resin are layered one after another on the base material for the decorative laminate, and then , a releasable film comprising a thermosetting ink layer using a thermosetting resin as a vehicle is placed so that the surface of the thermosetting ink layer on the film is in contact with the overlay paper, and hot pressure molding is performed. and then removing the releasable film from the obtained hot-press molded product to obtain a thermosetting resin decorative board to which the thermosetting ink layer in the releasable film has been transferred. A method for manufacturing a thermosetting resin decorative board. (2) A releasable film having a thermosetting ink layer is formed on the releasable film, a solid printing layer of transparent ink formed on the film, and a surface of the solid printing layer. A method for manufacturing a thermosetting resin decorative board according to claim 1, comprising a pattern layer made of colored ink. (3) Claims in which the releasable film having a thermosetting ink layer consists of a releasable film, a pattern layer made of transparent ink formed on the film, and a pattern layer made of colored ink. 2. The method for producing a thermosetting resin decorative board according to item 1.