JPS6048352A - Manufacture of ornamental material - 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 The present invention relates to a method for producing a decorative material that has a deep appearance and is less prone to cracking.

Conventionally, when making a veneer-substrate laminate using a thin veneer whose surface has been roughened with a wire brush or the like, there is a method of coating the surface of the veneer with an unsaturated polyester resin composition and bonding it under heat.

However, this method has the disadvantage that cracks are likely to occur during thermocompression bonding because the resin itself essentially has the property of shrinking during curing. As a countermeasure to this problem, a method of stacking resin-impregnated overlay sheets and bonding them under heat has been considered, but this method is not only not effective yet, but also increases the cost.

As a result of intensive studies aimed at solving these drawbacks, the present invention has been completed.

That is, in a veneer-substrate laminate having a roughened thin veneer on its surface, the surface of the veneer is colored, polished, and sealed, and then an unsaturated polyester resin composition or/and O. Coating an epoxy acrylate resin composition, and applying a composition containing a polyincyanate compound to the painted surface,
The present invention provides a method for producing a decorative material, which is characterized in that porous paper cloth is layered and hot-pressed either directly in the N state or after heat drying.

Unsaturated polyester resin composition used in the present invention or/
And as the epoxy acrylate resin composition, (5)
Unsaturated polyester resin or/and epoxy acrylate resin, (Bl polymerizable monomer that is liquid at room temperature and can be copolymerized with the resin, curing catalyst, and if necessary (1)) colorant, and other components It is a resin liquid made by blending.

Here, the unsaturated polyester resin which is the component (a) is a condensation product whose main components are an unsaturated dicarboxylic acid or anhydride and a dihydric alcohol, and the epoxy acrylate resin is a condensation product whose main components are an unsaturated dihydric carboxylic acid or anhydride and a dihydric alcohol. The following refers to a reaction product whose main components are an epoxy compound containing an epoxy group and an unsaturated basic acid, and is not particularly limited.

The (+3) component is not particularly limited as long as it is a polymerizable monomer copolymerizable with the four component resins and is liquid at room temperature.

(Component 0 is a catalyst used in the polymerization of component (5) and component (B), and is usually an organic peroxide compound.

(U components include, for example, colorants such as dyes and pigments, impregnation improvers, plasticizers, low-shrinkage imparting agents, surfactants, polymerization accelerators, polymerization inhibitors, thickeners, inorganic fillers, and organic solvents. etc. is indicated.

The base material or wood veneer used in the present invention may be one that has been conventionally used for this purpose, such as veneer plywood, wood board, hardwood, gypsum board, particle board, etc. Wood veneers include Japanese pine,
Can you give examples of straight-grained or wood-grained boards such as Yonetsuga, Japanese cypress, and cedar?

The present invention is not limited to these examples, and as a method for roughening the wooden veneer, methods such as polishing with sandpaper, sandblasting, wire plano, etc. are often used.

The adhesive for obtaining the veneer-substrate laminate is not particularly limited, and vinyl acetate polymer, urea resin, melamine resin, epoxy resin, and σ-olefin adhesives are usually used.

The roughened veneer is first colored, then polished,
Close your eyes. When coloring, use a coloring agent that can emphasize the wood grain.

For example, brown or orange dyes or pigments are used.

The polishing is performed using, for example, sandpaper to such an extent that the convex portions of the summer-grained portions can be removed. The filler is usually a clear resin that does not contain colorants. The type of resin may be one that is compatible with the resin composition coated thereon and does not release from the mold at the interface.

For example, polyurethane-based, polyester-based and vinyl-based materials can be used.

The porous paper cloth used in the present invention includes not only non-woven paper cloth made of organic fibers but also non-woven paper cloth made of inorganic fibers such as glass fibers. It needs to be porous enough to penetrate the underlying resin or porous paper cloth during hot pressing. This paper fabric prevents cracks from occurring and improves wear resistance, while also accentuating the wood grain of the veneer and contributing to its depth.

It may be a polyisocyanate monomer such as -, or a condensate having a free incyanate group, which is a reaction product of these polyisocyanates and a polyester polyol, a polyether polyol, a polyamine, or the like. In some cases, polymerizable monomers, polymerizable resins, curing agents thereof, organic solvents, and isocyanate reaction accelerators are added to these polyisocyanate compounds. Compositions containing these polyisocyanate-based compounds react with the unsaturated polyester resin composition and/or epoxy acrylate resin coated underneath, accelerate crosslinking, and do not eliminate surface stickiness, but rather cause cracks. Contributes to prevention of occurrence. After applying the composition containing a polyisocyanate compound, a porous paper cloth may be immediately overlaid, or it may be dried once at 40 to 100°C, and then a porous paper cloth is overlaid.

The heat press conditions after stacking are usually 80°C to 160°C.
Temperature conditions and time conditions of 5 to 30 minutes are selected. □ After hot pressing, surface finishing may be performed at the end. Normal surface finishing methods are used, such as sanding and applying a urethane top coat.

The present invention will be explained below using examples.

Example-1 A straight-grained veneer of Japanese pine was adhered to lauan plywood, the surface of the veneer was roughened with a wire brush, and then a polyurethane resin containing a light brown colorant was applied and heated at 60°C for 10 minutes. Dry. After that, I sanded it with sandpaper, and Natsume's protrusions were removed. Next, a composition consisting of 100 parts of Smear Knob MG-1 (unsaturated polyester resin liquid, manufactured by Sanken Kako Co., Ltd.), 4 parts of diallyl phthalate monomer, 1 part of Erosyl, and 4 parts of benzoyl peroxide was applied, and then polyether polyol was applied. A composition consisting of 100 parts of a reaction product with toluene diisocyanate (free MCO content 13%), 80 parts of styrene, and 5 parts of dimethylaniline was applied by spraying.

Next, the J-1 was dried for 10 minutes at 60°C.
/ m' of nonwoven fabric (trade name: Kurapabee, ■Kuraray product) was laminated and hot-pressed at 130° C. and 10 to 9/ci for 10 minutes. As a result, a decorative material with emphasized wood grain and no cracks was obtained.

Example-2 A rice grain veneer was glued to lauan plywood, and the surface of the veneer was roughened with a wire brush. Then, a polyurethane resin containing a light brown coloring agent was applied and heated at 60°C.
, and dried for 10 minutes. Thereafter, it was polished with sandpaper to remove the colored parts of the protrusions of the summer grain, and then a polyurethane-based clear paint was applied and dried at 60° C. for 10 minutes. Next, a composition consisting of 100 parts of Smear Knob EVR-911 (epoxy acrylate resin liquid, manufactured by Sanken Kako Co., Ltd.), 10 parts of methyl methacrylate monomer, 2 parts of Erosyl, and 3 parts of benzoyl peroxide was applied, and then polyester polyol and xylylene range were applied. A composition consisting of 100 parts of the reaction product with isocyanate (free NGO content 15%), 50 parts of ethyl acetate, 50 parts of styrene, and 0 parts of diethylaniline was applied. Next, dry at 70℃ for 5 minutes,
39 parts m' Surf Ace 7 notes (Nippon Sheet Glass Co., Ltd. product)
Laminated in one layer and heated to 120℃.

7 to 9/c! r, pressing was performed for 15 minutes. The obtained decorative material had a deep appearance and the wood grain was clearly emphasized. No cracks occurred even after repeated tests in cold and hot conditions.

Claims (1)

[Claims] In a veneer-substrate laminate having a roughened thin veneer on its surface, the surface of the veneer is colored, polished, and sealed, and then an unsaturated polyester resin composition or/and an epoxy acrylate resin composition is applied. It is characterized by painting an object, applying a composition containing a polyisocyanate compound to the painted surface, and applying it directly as described in 5 or after heat drying, layering a porous paper cloth and hot pressing. Decorative material manufacturing method.