JPH0966583A - Manufacture of high gloss finished decorative laminated board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a high gloss finished decorative laminated board by a method wherein when a decorative laminated sheet wherein a film of a specific heat deformation temperature and its paper base material are arranged on a resin-impregnated paper base material, a melamine resin-impregnated paper base material is further superimposed on the surface, and they are pressed by heating is stuck onto a wood board, a surface of the board is primer treated with a polyisocyanate resin. SOLUTION: When a thermoplastic film of 80-120 deg.C heat deformation temperature is arranged on a thermosetting resin-impregnated paper base material, the thermosetting resin- impregnated paper base material is arranged, a melamine resin-impregnated base material is further superimposed on the surface, and they are pressed by heating, and stuck onto a wood board, at that time a surface of the board is primer treated with a polyisocyanate resin. That is, a thermoplastic film 4 is superimposed between core materials 3, 5 consisting of a thermosetting resin-impregnated base material, and a decorative layer 2 consisting of a melamine resin impregnated base material and a surface layer 1 consisting of a thin melamine resin impregnated base material are successively superimposed. If necessary, a masking layer is inserted between the core material 3 and the decorative layer 2, and the whole is integrated by heating and pressurizing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a high-gloss decorative board used for a door of a kitchen furniture, a shelf of a showcase, or a vertical surface door.

[0002]

2. Description of the Related Art Recently, glossy doors for kitchen furniture and shelf boards for showcases are preferred. The conventional decorative board was produced by increasing the gloss of the intermediate plate that comes into contact with the melamine resin layer during polishing by polishing and transferring that gloss to the surface of the decorative sheet, but polishing stainless steel sufficiently Even if it is carried out, the surface becomes a "matte pattern" during the hot forming of the decorative plate. In addition, recently, a high-gloss decorative plate made of a vinyl chloride sheet membrane press has been proposed, but it has drawbacks such as being easily scratched on the surface.

Decorative boards are mainly attached to wooden boards such as plywood, MDF, and particle boards, and are used as decorative boards for doors of kitchen furniture and shelf boards of showcases. Apply a vinyl adhesive, ethylene vinyl acetate adhesive, or rubber adhesive to both the decorative board and the wood board and stick them together. In this method, the moisture contained in the adhesive is absorbed by the wooden board to form fine unevenness, or the fine unevenness is partially generated on the decorative board due to uneven coating of the adhesive.

In the conventional decorative board, even with such a method,
Although it was possible to process the decorative board without damaging the appearance of the decorative board due to the unevenness of the decorative board itself, a thermoplastic film having a heat distortion temperature of 80 to 120 ° C. used in the present invention is used. A decorative board that does not have fine surface irregularities, such as a high-gloss melamine decorative board made by stacking a thermosetting resin-impregnated paper base on top of this and a melamine resin-impregnated paper base on the surface and heating and pressing. In the case of sticking to a wooden board, the presence or absence of fine irregularities in the adhesive significantly affects the surface of the decorative board, and in many cases a sufficiently high glossy surface cannot be obtained.

There is a method of preventing fine unevenness with a putty putty, etc., but this method is originally intended to prevent the eyes from becoming rough and uneven, and if it is carried out on the entire surface, the cost will be greatly increased. Alternatively, when a decorative plate is attached, the adhesive force is not sufficiently expressed, which is not a preferable method.

[0006]

As described above, the present invention makes it possible to produce a decorative board having a high-gloss finish, which is difficult with the conventional method for manufacturing a decorative board.

[0007]

According to the present invention, a heat distortion temperature is 80 to 120 ° C. on a paper base material impregnated with a thermosetting resin.
A melamine resin decorative board made by arranging a thermoplastic film, which is a thermosetting resin, and a paper base material impregnated with a thermosetting resin, and further stacking a melamine resin-impregnated paper base material on the surface, and heat-pressing the wood base board. The present invention relates to a method for producing a high-gloss finish decorative board, which comprises subjecting the surface of the wood-based board to a primer treatment with a polyisocyanate resin when the board is pasted with.

The inventors of the present invention have shown that when the surface of a wooden board is treated with a primer for polyisocyanate, it exhibits a moisture-proof effect, and -NC of the polyisocyanate resin is used.
Focusing on the reaction between the O group and the -COOH group in the vinyl acetate adhesive, coating the surface of the wooden board with a polyisocyanate resin and curing it, and then applying the adhesive to the decorative board and the wooden board. It was developed and the technology to bond the two together. As the adhesive to be used, any adhesive such as epoxy resin type, rubber type, polyvinyl acetate type, ethylene / vinyl acetate copolymer type may be used. Therefore, a polyvinyl acetate-based or ethylene vinyl acetate copolymer-based adhesive is preferable. The wooden board used may be plywood, MDF, or particle board.

The thermoplastic film has a heat distortion temperature of 80 to 1
It is 20 ° C. If the heat distortion temperature is in this range, the adhesiveness at the time of molding is compatible with the gloss and heat resistance of the obtained decorative board, and the decorative board laminated to the wooden board has excellent gloss. It also has excellent characteristics. As this thermoplastic film, an ABS film having a thickness of 100 to 250 μm is preferable for maintaining the adhesive force and gloss.

[0010]

FIG. 1 is a schematic sectional view of a high-gloss decorative board of the present invention, in which a thermoplastic resin is provided between core material layers (3) and (5) made of a thermosetting resin-impregnated base material. The film (4) is superposed, then the decorative layer (2) made of the melamine resin-impregnated base material and the surface layer (1) made of the thin melamine resin-impregnated base material are sequentially superposed, and if necessary, the core material layer (3). And a decorative layer (2), a shield layer is inserted between them and the whole is heated and pressed to be integrated.

Next, FIG. 2 is a schematic sectional view of an example of a decorative board in which the decorative board (6) is attached to a wooden board (10). The surface of the wooden board is coated with a roll coater or brush. 1.5 to polyisocyanate resin (9)
After applying 2g / 300 × 300mm ² and air-drying for 4 hours or more, apply vinyl acetate adhesive (7, 8) to the decorative board and the wooden board respectively at 4 to 5g / 300 × 300mm ^{2 and} apply makeup. Laminate board and wood board. As a method for applying the adhesive, a method using a roll coater is preferable because the coating amount can be easily adjusted.

In the present invention, the polyisocyanate resin used for moistureproofing the wooden board is T
Any of DI type, HDI type, and IPDI type may be used. Further, it is preferable to air dry for 4 hours or more after coating the polyisocyanate resin. If the adhesive is applied immediately after coating, the coating film is not sufficiently formed and the waterproof effect is small, and the effect of preventing moisture in the adhesive from penetrating into the board cannot be fully exerted, so the decorative board It is not possible to completely eliminate the fine irregularities after the bonding.

[0013]

【Example】

<Example 1> A kraft paper having a basis weight of 195 g / m ² is impregnated with a water-soluble phenolic resin and dried, and a sheet of impregnated paper having a resin content of 35% is provided with a thickness of 150 μm and a heat distortion temperature of 100 ° C. Overlay the ABS film, then the same impregnated paper 1 as above
A sheet and a decorative paper having a basis weight of 120 g / m ² are successively laminated with a decorative layer having a resin content of 50% obtained by impregnating and drying a melamine resin, and the decorative layer has a stainless steel plate and a measured value of 300 with a gloss meter. The mirror-finished stainless steel plates as described above were stacked and heat-pressed under the conditions of 160 ° C. and 100 kg / cm ² to obtain a high-gloss melamine resin decorative plate having a thickness of 0.7 mm. The back surface of this decorative plate is sanded with sandpaper, and a vinyl acetate adhesive (Esdyne 5401W made by Sekisui Chemical Co., Ltd.) is used at 4 to 5 g / 300 × 300 m.
It was coated with an m ² roll coater. On the other hand, MDF is used as a wood board, and 1 g of TDI polyisocyanate resin (L-75 manufactured by Sumitomo Bayer) is used on the surface of the board.
/ 300 × 300mm ² coated with a roll coater,
After air-drying for 4 hours, vinyl acetate adhesive (Sekisui Chemical
Esdyne 5401W) 4-5g / 300 x 300
The coating was performed using a mm ² roll coater, and the decorative plate and MDF were bonded together to obtain a high-gloss decorative board.

Example 2 High gloss was obtained in the same manner as in Example 1 except that HDI polyisocyanate resin (N-75 manufactured by Sumitomo Bayer) was used as the polyisocyanate resin coated on the MDF. Got the makeup board.

Comparative Example 1 A vinyl acetate adhesive was used in the same manner as in Example 1 until a decorative plate was obtained.
It was coated with a × 300 mm ² roll coater. MDF
No polyisocyanate resin was used as a primer, and 7-8 g / 300 × 3 of vinyl acetate adhesive was used.
Coating was performed with a 00 mm ² roll coater, and the both were laminated to obtain a decorative board.

Comparative Example 2 Three pieces of impregnated paper having a resin content of 35% obtained by impregnating and drying a kraft paper having a basis weight of 195 g / m ^{2 with} a water-soluble phenolic resin are further stacked, and further having a basis weight of 120 g / m ^2.
Resin content obtained by impregnating and drying melamine resin on 50% decorative paper
% Of the decorative layer, and a stainless steel plate with a mirror finish of which the value measured by a gloss meter is 300 or more is stacked as the stainless plate on the decorative layer at 160 ° C. and 100 kg / c.
Heat and pressure molding under the condition of m ² to obtain a 0.8 mm-thick decorative plate, sanding the back side with sandpaper, and vinyl acetate adhesive 7-8 g / 300 × 300 m
Coating with m ² roll coater. In addition, MDF is not subjected to a primer treatment with a polyisocyanate resin, and a vinyl acetate adhesive is used at 7 to 8 g / 300 × 300.
It was coated with a mm ² roll coater, and both were laminated to obtain a decorative board.

With respect to each of the obtained decorative boards, the appearance after processing and the plane tensile strength of the decorative board were evaluated according to the JAS test method, and the results shown in Table 1 were obtained. The surface decorative layer used was gravure printing paper.

Table 1 ───────────────────────────── Appearance after processing Plane tensile strength (kg / cm ² ) ─── ────────────────────────── Example 1 High gloss and smooth surface 4 or more Example 2 High gloss and smooth surface 4 or more Comparative example 1 Pattern tendency 4 or more Comparative Example 2 Surface undulation 4 or more ──────────────────────────────

In the examples, it was possible to obtain a decorative board having a high gloss and a smooth surface by preventing fine irregularities due to the adhesive. The plane tensile strength is also JA
It has cleared the S standard of 4 kg / cm ² or more.

[0020]

The method for producing a high-gloss decorative board of the present invention has a high gloss of a decorative board that is not utilized due to the fine unevenness of the adhesive in the conventional method of sticking a decorative board to a wooden board. Also, it is possible to provide a decorative board that sufficiently exhibits smoothness. The obtained decorative board is suitable for system kitchen doors, showcase shelves, etc. that require a high-class feeling, and the amount of adhesive used can be halved, so processing costs are greatly reduced. it can.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an example of a high-gloss decorative board of the present invention.

FIG. 2 is a schematic sectional view of an example of a high-gloss decorative board of the present invention.

[Explanation of symbols]

 1 Surface Layer 2 Decorative Layer 3 Core Material Layer 4 Thermoplastic Film 5 Core Material Layer 6 Decorative Board 7 Vinyl Acetate Adhesive Layer 8 Vinyl Acetate Adhesive Layer 9 Polyisocyanate Resin Primer Layer 10 Wooden Board

Claims (2)

[Claims] 1. A paper base material impregnated with a thermosetting resin,
A thermoplastic film having a heat distortion temperature of 80 to 120 ° C. is arranged, a paper base material impregnated with a thermosetting resin is arranged, and a melamine resin-impregnated paper base material is further laminated on the surface, and heat press molding is performed. A method for producing a high-gloss finish decorative board, characterized in that, when a melamine resin decorative board is attached to a wooden board, the board surface is subjected to a primer treatment with a polyisocyanate resin. 2. The thermoplastic film has a thickness of 60 to 150 μm.
The method for manufacturing a decorative board according to claim 1, wherein the decorative board is an ABS film of m.