JPS6221505A - Manufacture of reinforced veneer - 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 [Field of Industrial Application] The present invention relates to a reinforced veneer for use in building and furniture materials.

[Prior art and its problems]

BACKGROUND ART Conventionally, a method of manufacturing a reinforced wood veneer by impregnating a wood veneer with a synthetic resin by a vacuum impregnation method or a pressure impregnation method has been widely used.

However, no reinforced veneer with unevenness is known so far.

[Means for solving problems]

The present invention relates to a method of manufacturing a reinforced veneer with unevenness, which has not been known in the past, by impregnating a wooden veneer with a synthetic resin or oil, and then placing an embossed material thereon and pressing it. The embossed material is then removed.

According to the present invention, unevenness is formed on the wood veneer, thereby creating differences in shading and transparency between the four parts and the convex parts, and at the same time, a reinforced veneer with a three-dimensional effect of the unevenness can be obtained.

As the embossing material, a sheet made of polyester, polyethylene, etc., which has been textured, a textured metal plate, textured paper with releasability, and the like are used.

After the embossed material is placed on a wooden veneer impregnated with a resin or the like, it is pressed. The compaction may be done by hot pressure or cold pressure, and the conditions for hot pressure are, for example, a pressure of 3 to 15 kg/cJ and a temperature of 110 to 160°C for 1 to 1°, but the conditions are not limited thereto. .

The synthetic resins used in the present invention include alkyd resins, epoxy resins, polybutadiene resins, urethane resins, unsaturated polyester resins, acrylate resins, diallyl phthalate resins, etc., and the oils and fats include linseed oil, Refers to boiled oil, etc. Naturally, the synthetic resin includes a two-component synthetic resin, and specific examples include the following combinations.

Epoxy resin: A liquid containing an epoxy resin liquid and a curing agent (ethylene diamine), etc. Polybutadiene resin: A liquid containing a polybutadiene resin liquid and a catalyst (benzoyl peroxide), etc. Urethane resin: Acrylic polyol, polyamine, etc. 1. Polyester polyol and curing agent (TDI
-MI)r-HMDI), etc. ←・Liquid acrylate resin containing unsaturated polyester resin and catalyst (benzoyl peroxide, dicumyl peroxide), etc. Epoxy acrylate-1・A liquid containing an initiator (acetyl peroxidase 1) and a reactive diluent (methyl methacrylate, methyl acrylate, ethyl acrylate, butyl methacrylate 1)
・) may be added.

Diallyl phthalate resin...liquid containing diallyl phthalate resin liquid, catalyst (benzoyl peroxide, tert-butyl peroxide, tert-butyl peracetite), etc., and synthetic resin or oil to be impregnated into the wood veneer. If it is heated to 100℃ or higher before impregnation, its viscosity will be lowered, and the heating of the wood veneer during impregnation will soften the wood structure and remove moisture and air from the wood veneer. It becomes easier to escape outside, and as a result, the wood veneer becomes more likely to be impregnated with synthetic resin liquid, etc. This is because when the temperature exceeds 100°C, the moisture in the wood veneer evaporates and is easily replaced with synthetic resin liquid.

The wood veneer thus impregnated with synthetic resin or oil is then cured by appropriate means. Possible curing methods include a method of leaving it as is, a method of accelerating curing by heating, and a method of using ultraviolet rays or electron beams.

Note that a dryer, a hot roll press, or a flat plate hot press may be used for heating.

Furthermore, a top coat may be applied to the surface of the reinforced veneer having irregularities obtained by the method of the present invention so as not to erase the irregularities. Examples of this top coat include urethane resins, polyester resins, alkyd resins, and the like, and wear-resistant inorganic particles such as silicon carbide and aluminum oxide may also be mixed into the top coat.

Example 1 Unsaturated polyester wood Mu 1 on 0.8 cm thick Japanese pine veneer
After being impregnated with a resin solution containing 1 part by weight of 00 weight and 1 part by weight of Pennzoyl bar oxide for 2 hours under reduced pressure, this wood veneer was placed on the surface of a 12++++ thick plywood board via a urethane adhesive, and then An embossed polyester film with a thickness of 80 μm was placed on top, and the weight was 3 kg at 130°C.
/cl+ for 5 minutes to complete adhesion and the effect of the unsaturated polyester resin, and the film was peeled off to obtain a reinforced veneer laminated decorative board with a desired uneven pattern.

Example 2 After impregnating an unsaturated polyester resin into an oak veneer with a thickness of 11 layers under reduced pressure for 2 hours, the same unsaturated polyester resin 100
Parts by weight, 80 parts by weight of methyl methacrylate, 10 parts by weight of dicumyl peroxide, 60 parts by weight of methyl isobutyl ketone
parts by weight of the liquid for 2 hours. A 40 μ thick embossed polyester film is placed on top of this wood veneer, and a smooth polyester film is placed underneath.
A reinforced veneer with a desired uneven pattern was obtained by hot pressing at 130° C. and 8 kg/c+a for 5 minutes.

Example 3 Instead of impregnating a 111-thick oak veneer under reduced pressure with the unsaturated polyester resin of Example 3 for 2 hours, except that the 11-thick oak veneer was immersed in an unsaturated polyester resin solution at 110°C for 2 minutes. A reinforced veneer with a desired uneven pattern was obtained in the same manner as in Example 3.

Example 4 A 0.6 fl thick Japanese pine veneer was impregnated with epoxy acrylate resin under reduced pressure for 40 minutes, and then immersed in a solution containing 8 parts by weight of acetyl peroxide, 100 parts by weight of methyl methacrylate, and 40 parts by weight of ethyl acrylate for 1 hour. did. Next, place an uneven metal plate on top of this Japanese pine veneer and heat it to 1k at 110℃.
g/ct for 10 minutes to obtain a reinforced veneer with a desired uneven pattern.

Example 5 40% of the epoxy acrylate resin of Example 4 was applied to a Japanese pine veneer.
A reinforced veneer with a desired uneven pattern was obtained in the same manner as in Example 4, except that the Japanese pine veneer was immersed in an epoxy acrylate resin solution at 120° C. for 40 seconds instead of being impregnated under reduced pressure for a minute.

Example 6 Epoxy resin at 120°C (trade name Epicote 828)
After immersing a 0.41-thick birch veneer in the liquid for 30 seconds, remove the excess liquid and coat both sides of the veneer with ethylenediamine 10.
0 parts by weight and 100 parts by weight of methyl ethyl ketone was applied at 80g/rd, a 60μ embossed polyethylene film was placed on the surface, left for 4 hours, and then hot-pressed at 150°C and 10kg/cJ for 3 minutes to obtain the desired shape. A reinforced veneer with an uneven pattern was obtained.

Example 7 TDI type prosocyanate at 110°C]・110
After immersing a 0.8+im thick oak veneer for 2 minutes in a solution containing 0 parts by weight of 100 parts by weight of ethylene glycol dimethyl ether acetate, the excess solution was removed, and then in a solution containing 100 parts by weight of polypropylene glycol and 150 parts by weight of ethylene glycol dimethyl ether acetate. Soaked for 7 hours. After that, a 25 μm polyester film was laminated onto kraft paper, embossed, and then the film side was placed against the veneer surface at 160℃ and 10 kg/
A reinforced veneer with a desired uneven pattern was obtained by hot pressing for 3 minutes under the conditions of cJ.

Example 8 The veneer used in Example 1 was immersed in a linseed oil solution for 30 minutes, then taken out from the solution, an uneven metal plate was placed on the surface, and the plate was pressed at 15 kg/cJ for 8 minutes, then left at room temperature. The desired reinforced veneer was obtained by standing.

Example 9 Desired strengthening was achieved in the same manner as in Example 8, except that instead of immersing the veneer in the linseed oil solution of Example 8 for 30 minutes, the veneer was immersed in the linseed oil solution heated to 160° C. for 30 seconds. I got a veneer.

Example 10 In an acrylic ultraviolet curable resin liquid heated to 120°C,
1. (After immersing a 1mm thick Japanese pine veneer for 20 seconds, take it out of the solution, place a 60μ embossed polyester film on the surface, press it at 12kg/c11 for 5 minutes, and output 160W/cm from both sides. A desired reinforced veneer was obtained by irradiating with an ultraviolet lamp of cI11 for 3 seconds.

〔Effect of the invention〕

In the present invention, an embossed material is applied to the surface of a wooden veneer impregnated with a resin or the like and then pressed, so a reinforced veneer with unevenness can be obtained.
This veneer has a difference in shading and transparency between the concave and convex parts, making it an extremely beautiful reinforced veneer. Furthermore, if this resin or the like is heated to 100° C. or more before impregnation, remarkable effects such as a significant improvement in the impregnation rate can be obtained.

Claims (2)

[Claims] (1) Manufacture of reinforced veneer with unevenness by impregnating a wooden veneer with synthetic resin or oil, placing an embossed material thereon and pressing it, and then removing the embossed material. Method (2) The method for manufacturing a reinforced veneer according to claim 1, wherein the synthetic resin or oil or fat to be impregnated into the wood veneer is heated to 100° C. or higher in advance.