JPS6251404A - Manufacture of reinforced decorative 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 (Industrial Field of Application) The present invention relates to a method for manufacturing a reinforced decorative material that allows uniform injection of a synthetic resin liquid.

(Prior Art) Conventionally, various types of precious wood have been widely used in the field of new wood building materials, but the price of high-quality precious wood has soared as precious wood resources are depleted.

On the other hand, so-called "Wood" improves the durability of wood materials by injecting synthetic resin liquid into such precious wood.
Techniques such as plastic combination have been devised, and vacuum methods, pressurization methods, reduced pressure pressurization methods, and the like have been adopted to uniformly inject synthetic resin liquid.

However, depending on the type of wood material, the penetration of the synthetic resin liquid is partially inhibited by wood extract components mixed in the wood, making uniform injection treatment difficult. Although these wood extract components have been removed using organic solvents or the like, it has been difficult to remove these treatment liquids after the extraction process, and the removal effect has not been sufficient.

(Problem to be Solved by the Invention) Therefore, when injecting synthetic resin liquid, there are methods such as carrying out a test injection in advance and selecting only easy-to-inject materials, or selecting easy-to-inject materials empirically based on the appearance of the wood. However, these methods have not been fully utilized as industrial methods because they cause problems such as difficulty in repurposing difficult-to-inject materials and the production of a large number of defective products.

(Means for Solving the Problems) Therefore, the present inventors investigated various treatment methods in order to solve the above-mentioned problems, and found that by pre-treating wood materials with an aqueous surfactant solution, these The inventors have discovered that it is possible to solve these problems and have arrived at the present invention.

That is, the present invention is a method for producing a decorative material, which is characterized in that a wood material is treated with an aqueous surfactant solution in advance before injecting a synthetic resin liquid.

(Summary of the invention) Wood Plastic in which synthetic resin liquid is injected into wood
The Col1-bination technique improves the abrasion resistance, water resistance, impact resistance, chemical resistance, and crack resistance of wood.
In addition to improving physical properties such as rot and insect repellency, it is also important to improve highly sensory elements such as design and color tone, so it is essential to uniformly inject synthetic resin liquid into the wood. It is. Examples of the synthetic resin liquid used in the injection of the present invention include styrene, methyl methacrylate, butyl acrylate, etc., diallylphthalate prepolymers, unsaturated polyester oligomers, melamine resin, phenolic resin, urea resin, etc. Various water-soluble resins such as resins that are commonly used for this purpose can be used.

The type of wood material into which the synthetic resin liquid is injected varies depending on the purpose, but it is possible to use various hardwood materials such as sticks, seedwood, and ash wood, as well as various softwood materials such as pine, cedar, and seedwood. can. As for the shape of these wood materials, in addition to wood, various wood materials such as sliced veneer, sawn veneer, etc. can be used.

As the surfactant, nonionic surfactants can be used, and ether-type nonionic surfactants such as polyoxyethylene alkyl ether and polyoxyethylene alkyl phenyl ether are particularly good. Since these surfactants do not ionically dissociate in an aqueous solution, they are not affected in any way even in hard water containing various metal salts and organic salts. Furthermore, it is superior to anionic or cationic surfactants in terms of compatibility with various solvents and chemicals, making it optimal for the purpose of the present invention. The concentration of the surfactant aqueous solution varies depending on the type of wood to be treated, but usually an aqueous solution of about 1-1 (]$ can be adjusted and used. As a treatment method, the immersion method can be used to prepare a solution of about 5 to 10 times the liquid ratio. A treatment time of about 1 to 10 hours is sufficient.After the immersion treatment, the veneer for injection of synthetic resin liquid is obtained by thoroughly washing with water and drying by a conventional method.During the treatment, if necessary, the interface The treatment time can also be shortened by heating the activator aqueous solution.

Example 1 200 Japanese pine sliced veneers (Q, 8a+m thickness) were immersed in an aqueous solution of polyoxyethylene alkyl phenyl ether type nonionic surfactant 5z at a temperature of 80°C for 3 hours, and then subjected to a conventional method. Wash with water.

Drying was performed to obtain a veneer for pouring (water content: 5%). Then, an unsaturated polyester resin to which benzoyl peroxide 1z was added was injected into this veneer under reduced pressure, and then a predetermined pressure was applied to obtain a synthetic resin liquid-injected veneer.

Next, the veneer was hot-press bonded to lauan plywood (125 m thick) using a water-based vinyl urethane resin adhesive to obtain a reinforced decorative board. The obtained reinforced decorative board was beautiful and had no unevenness in design due to non-uniform impregnation.

Comparative Example 1 A reinforced decorative board was prepared by the same method as in Example 1 except for the treatment with a nonionic surfactant, but the obtained reinforced decorative board had extremely many irregularities in design.

(Effects) Despite the extremely simple manufacturing method of the reinforced decorative material of the present invention, a uniform injection effect can be obtained;
Therefore, it is used as an industrial method. Furthermore, the decorative material has uniform strength, and there is no unevenness in design due to non-uniform impregnation of the resin liquid, and a reinforced decorative material with high commercial value can be obtained.

Claims (1)

[Claims] 1. A method for producing a reinforced decorative material in which various synthetic resins are injected into a wood material, which includes soaking the wood material in advance with an aqueous surfactant solution, drying it, and then injecting the synthetic resin liquid. A method for producing a reinforced decorative material characterized by: 2. The method for producing a reinforced decorative material according to claim 1, in which a nonionic surfactant is used as the surfactant. 3. A method for manufacturing a reinforced decorative material according to claim 1 or 2, in which a softwood decorative veneer is used as the wood material.