JPS58199102A - Manufacture of natural thin board, in which grain is emphasized, and decorative board using said thin 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 The present invention provides a natural wood thin board that is hard and weather resistant and has an enjoyable wood grain by subjecting a thin natural wood board to high-pressure steam treatment and resin impregnation treatment, and furniture using the thin board. relates to a method for manufacturing natural wood decorative boards for housing interior materials.

When a natural wood thin board with a thickness of 0.15 to 3.0 cm is treated with pressure steam, the following assimilation is observed compared to an untreated thin board.

(a) The color of the original wood changes, and birch becomes colored after being exposed to the atmosphere for several years.

(b) Stains and dirt on wood are removed.

(c) The weather resistance of wood is improved.

(d) It becomes easier to impregnate wood, especially the spring wood, with resin.

The present invention takes advantage of the changes in the wood S board caused by high-pressure steam treatment and selects a resin solution that becomes transparent or translucent after curing, and thereby enhances the grain of the wood. The present invention provides a method for manufacturing a hard thin natural wood board with excellent weather resistance, and a method for manufacturing a cosmetic machine using the thin board.

Conventionally, a method has been used in which a thin natural wood board is treated with high-pressure steam and the spring material is impregnated with resin to improve the strength. death,
However, in this conventional method, the impregnated resin becomes transparent after curing, which gives it a plastic feel. The joy of
It felt cold and spoiled the feel of the natural wood. In addition, the spring material impregnated with such transparent resin changes color when irradiated with ultraviolet rays, making it weather resistant. Natural wood fiI@ could not be used for high-end furniture or interior materials.

The present invention has been made to eliminate the drawbacks of the above-mentioned conventional methods, including: (1) exposing a thin natural wood board to a high-pressure steam atmosphere;

■Step of drying the thin plate.

(2) A step of impregnating the spring material of the thin plate with a polymerizable unsaturated resin liquid under vacuum.

■ A method for producing a hard natural wood thin board with enhanced wood grain and excellent weather resistance, which comprises a process of curing a resin liquid impregnated under heat-pressure conditions to make it opaque or translucent; The thin plate is glued plywood, Birchcleboard 1
Layer them on a plate-shaped base material such as hardboard, heat-press them, and press the front button! Manufacturing 7711 of a decorative board having on its surface a hard natural wood thin board with enhanced wood grain and excellent weather resistance, which consists of simultaneously curing a resin liquid to make it opaque or translucent and bonding it.

The present invention will be described in more detail below.

As the natural wood ah that can be used in the first invention of the present invention, soft spring wood such as cedar, Japanese pine, Japanese yonetsuga, Japanese cypress, Japanese fir, inner plug agathis, soothorn, etc., with a thickness of 0.15 to 3 mm are used. You can use something that has been soaked in water.

High-pressure steam treatment refers to the treatment of natural wood thin boards of 4 to 8 kg/-^1.
1a means exposure to C5 to 20 minutes in the air, and this high-pressure steam treatment stops the cell activity of the natural wood lamina and allows the spring wood to be easily impregnated with the polymerizable I/saturated wood III solution. do.

Next, it is dried at a temperature of 130°C to 160°C for 3 to 10 minutes (to reduce the moisture content of the natural wood thin board to 7% or less.

The degree of vacuum for the natural wood thin plate prepared in this way is 3.
1 to 5 of polymerizable unsaturated resin liquid under high vacuum of ~20 torr
Take the time to do the impregnation treatment. After the impregnation treatment, the resin liquid on the soft wood part is removed by suitable heating.

A thin natural wood board whose spring wood part is impregnated with monolithic unsaturated tree III is heated to 130°C by an appropriate heat-pressing means such as a press.
-1801°, pressure 2-7-/- for 5-10 minutes. During this hot potato step, a portion of the polymerizable unsaturated resin liquid evaporates to generate bubbles. Therefore, when the resin liquid hardens, it becomes opaque or V! A polymerizable unsaturated resin liquid that is cured with the soft wood part becoming transparent, carbonized and darkened by high-pressure steam treatment, while the spring wood part, which is also darkened by high-pressure steam treatment, is opaque or translucent. Because of this, the color is dimmed. As a result, the shading of the soft wood and spring wood parts becomes clearer, and the wood grain is emphasized without losing its natural flavor. Of course, since the resin is impregnated into the spring material and hardened, the soft spring material becomes hard and durable like the soft material.

What is the polymerizable unsaturated resin liquid used in the present invention? 30 to 50 parts of polymerizable unsaturated resin and 40 to 50 parts of polymerizable resin
A composition consisting of an IJ part, 6 to 15 parts of thermoplastic resin 1af, and a suitable catalyst, and the polymerizable unsaturated resin includes unsaturated polyvarnish resin, unsaturated polyamide resin, unsaturated urethane resin, unsaturated acrylic resin. Polymerization 411 (as a polymer, styrene, various (meth)acrylic resins, etc. can be used, and as a thermoplastic resin, saturated polyester resin, saturated Acrylic resins, molecular weight epoxy resins, vinyl chloride vinyl acetate copolymers, etc. can be used.

In addition, to summarize the characteristics of the polymerizable unsaturated tree III used in the present invention, it is self-C1 hardened at a temperature below the deterioration temperature of natural wood thin boards, and has sufficient hardness after hardening;
In addition, some or all of the sotsuma vaporizes within 1 cup temperature. In addition, when the entire resin liquid is completely cured, the monomer is vaporized and small air bubbles at ζ7 are enclosed in the cured resin (!

The most characteristic feature of the present invention is that when the polymerizable unsaturated resin liquid is cured, it becomes opaque or translucent due to the bubbles. In this way, the polymerizable unsaturated resin liquid impregnated into the spring material becomes transparent or translucent after curing, making it easy to write! -5- For some reason, the wood grain is naturally emphasized.

The second invention of the present invention is based on the first invention (1).
IIIi obtained by plywood, particle board, /X
- A method of obtaining a decorative machine by bonding to a base plate such as a board, etc., in which the spring material obtained in the same process as the first invention is impregnated with a polymerizable unsaturated resin liquid, and is applied to an aqueous or non-aqueous system. The adhesive is applied to the above-mentioned base plate covered with a lid, and the temperature is 130~tso℃ and the pressure is 2~7kg/
Press a1 for 5 to 10 minutes. This makes it possible to obtain a decorative machine made of hard natural wood that has excellent weather resistance, accentuated grain, and is resistant to scratches.

Example 1 A straight-grained thin veneer of Japanese pine with a thickness of 0.3 mm was placed in a high-pressure steam pot with a pressure of 4 kg/-, and after steaming for 20 minutes, it was taken out.The treated Japanese pine veneer was heated to a temperature of 160°C. The dried Japanese pine veneer was dried for 3 minutes to bring the moisture content to 6%.Then, the dried Japanese pine veneer was vacuumed to a vacuum level of 8 Torr, and the polymerizable unsaturated wood was placed in a vacuum pot. Impregnation was carried out with 11 liquids of Buntokikai. The polymerizable unsaturated resin liquid used at this time had the following composition.

6- Styrene monomer −−−−−−−−−−−−−
−−−−−”” Part J 50% penzoyl peroxide−−
----1-----3-part epoxy resin (trade name Epicote 828: Yuka Shell Co., Ltd. II) ---
−−−−−−−−−−−−−−2 parts veneer weight ratio: 12
0% of the above resin liquid was impregnated with 1.50% of the above resin liquid.
A full sheet of plywood coated with g/nf adhesive was pressed with a hot press at a temperature of 135° C. and a pressure of 4 kg/- for 1 minute. As a result, the curing and adhesion of the impregnated resin liquid were completed simultaneously, resulting in a hard-finished decorative board with straight-grained rice pine and excellent weather resistance with emphasized wood grain. The adhesive used at this time was as follows.

Dainippon Ink Chemical @IIB adhesive, product name MP
100 parts hm crosslinking agent, trade name-P-3! J House Wheat Flour
1! + 611 Example 2 A thin veneer of Japanese cypress with a thickness of 0.25- was placed in a pressure steam oven at a pressure of 6 kg/d, and steamed in 10 portions, and then the Japanese cypress was heated at a temperature of 150°C. Dry for 5 minutes. Moisture content 7
% Hinoki lit in a vacuum pot, and the vacuum level is 1 Fl.
)-1, Polylac 5193 (Dainippon Ink & Chemicals Co., Ltd. II) 100111, 10 parts of styrene monomer, 1.5 parts of benzoyl oxide,
Kozol 1308S (Dainippon Ink & Chemicals Co., Ltd. ml) A polymerizable unsaturated resin solution consisting of 4 parts was injected into the solution, and 60 portions were placed under water-vacuum conditions. Then, the resin-impregnated cypress veneer is taken out. A solution consisting of 1,100 parts of L Kinen, 60 parts of calcium carbonate, and 14 parts of anhydrous silica was applied onto a particle board at a rate of 150 g/rd, and then an impregnated cypress board was placed on the plate and a sensitivity of 140 was applied using a hot press.
C. and a pressure of 2 kg/- for 7 minutes. As a result, the hardening of the impregnated resin liquid and the board-laying process were completed at the same time, resulting in a hard cypress veneer with a clear grain and a hard cypress veneer with a clear grain that retained the original cypress hue.

Claims (1)

[Claims] l A thin natural wood board is exposed to high-pressure steam, and then the spring wood portion of the thin board is impregnated with a polymerizable unsaturated resin liquid under vacuum, and then the wood is heated under heat and pressure conditions. A method for producing a hard natural wood thin board with enhanced weather resistance and enhanced wood grain, characterized by curing the wood to make it opaque or translucent. 2. A thin natural wood board is exposed to high pressure steam, and then the spring material portion of the thin board is impregnated with a polymerizable unsaturated resin liquid under vacuum. Next, the thin plate is layered on a plate-like base material such as plywood, particle board, hardboard, etc. coated with adhesive, and bonded by thermocompression to harden the resin liquid to make it opaque or translucent. A method for manufacturing a decorative board having hard natural wood thin boards with excellent weather resistance and a characteristic wood grain on both sides.