JPS6140103A - 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 [Industrial Application Field] The present invention relates to a method for producing reinforced veneers for use in building materials and furniture materials.

[Prior Art] It has been known to produce reinforced wood veneers by impregnating a completely dry wood veneer or a wood veneer with an extremely low moisture content of 3% or less with a synthetic resin using a vacuum impregnation method or a pressure impregnation method. .

[Problems to be Solved by the Invention] Conventional methods have the disadvantage that it is difficult to reliably impregnate a wooden veneer with a synthetic resin in a short period of time.

[Means for solving the problems] This invention solves the above-mentioned drawbacks, namely:
When manufacturing reinforced veneers by impregnating wooden veneers with synthetic resins or oils, the wood veneers with a moisture content of 6% or more are immersed in a heated solution of synthetic resins or oils and then taken out. Alternatively, the present invention relates to a method for manufacturing a reinforced veneer, which is characterized by curing oils and fats.

Here, synthetic resins refer to alkyd resins, epoxy resins, polybutadiene resins, urethane resins, unsaturated polyester resins, acrylate resins, diallyl phthalate resins, etc., and oils and fats refer to linseed oil, boiled oil, etc. etc.

In addition, of course, there are 乎-shaped parts in the synthetic resin.
Containing synthetic resins, specific examples include the following combinations.

Epoxy resin: Epoxy resin liquid and curing agent (di-ethylene diamide) Polybutadiene resin: Polybutadiene resin liquid and catalyst (benzoyl peroxide) Urethane resin: Acrylic polyol or polyamine or polyester polyol and curing agent ( TDI
-MDI -uMD'x), 1 Unsaturated polyester resin...unsaturated polyester & resin and catalyst (benzoyl peroxide/dicumyl peroxide), acrylate resin...nyxacrylate and initiator (acetyl peroxide) In addition, a reactive diluent (methyl methacrylate, methyl acrylate, ethyl acrylate, butyl methacrylate) may be added.

Diallyl phthalate resin... diallyl phthalate resin liquid and catalyst (peroxide, tert-butyl peroxide, t-butyl per7 cetate) An important component of this invention is the water content in the heated liquid of synthetic resin or oil and fat. This involves soaking wood veneers with a content of 6% or more. When a wood veneer with a moisture content of 6% or more is immersed in a heated liquid made of synthetic resin, etc., the water in the wood veneer tends to evaporate and be replaced by the synthetic resin, etc., and the viscosity of the synthetic resin, etc. In addition to this, when the wood veneer is heated, the wood structure softens and swells, making it easy to impregnate synthetic resin, etc., and this has the advantage that a large amount of synthetic resin, etc. can be impregnated into the wood veneer.

The heating temperature is preferably 100°C or higher, which means 100°C or higher.
If the temperature exceeds ℃, the moisture in the wood veneer is likely to escape and be further replaced by synthetic resin liquid, etc.

The wood veneer thus impregnated with synthetic resin or oil is then cured by appropriate means. Possible curing methods include leaving the material as it is, heating it to accelerate curing, and using an electron beam or an electron beam. For heating, a dryer or ear may be used, and a heat roller, a press, or a flat plate heat press may also be used.

[Effect of the invention 1, the invention, application, is structured as described in 4 above! Because of this, it can be reliably bonded to the wood veneer in a short period of time, resulting in 114Im?
It can be impregnated with oils and fats.

In addition, by heating the synthetic resin, or oils and fats, it is possible to impregnate the wood veneer with the synthetic resin liquid, etc., even more efficiently by using a reduction method or pressurizing method. It's like a morning.

[Example 1], 110
in unsaturated polyester resin liquid at °C.

After immersing a 11-thick oak veneer with a water content of 6% for 2 minutes, 100 parts by weight of the same unsaturated polyester shelf fat and methyl methane were added.
It was immersed for 2 hours at 130% in a solution of 80 parts by weight of rylate, 1.0 parts by weight of dicumyl peroxide, and 60 parts by weight of methyl isobutyl ketone, and 8 kg was impregnated very uniformly.
/crn' conditions, 5 silkworms and the desired reinforced veneer.7. - Pledge Example 1. The veneer was dried and impregnated with synthetic resin in the same manner as the actual monument, except that the moisture content □ was 2%.
The impregnation rate was only 130%, and the impregnated condition was also unrestricted.

[Example 2] In an epoxy acrylate resin liquid at 120°C, the water content was 8.
A pine veneer with a thickness of 40%, Ol, and 40% was immersed for 40 seconds in a solution containing 8 parts by weight of acetyl peroxide, 10% by weight of methyl methacrylate, and 40 parts by weight of ethyl acrylate for 1 hour. The impregnation rate of this material was 140% in terms of absolute dry weight, indicating a very uniform impregnation state, and the material was then dried at 90° C. for 4 hours to obtain the desired reinforced veneer.

[Example 3] 110 parts by weight containing 20 parts by weight of ethylene diamine and 100 parts by weight of ethylene glycol methyl ether acetate
In the liquid at ℃, moisture content is 20%, 0. A f1m thick Toga veneer was immersed for 1 minute and the excess liquid was removed, then poured into 160°C epoxy resin (trade name Epicor 828).
It was immersed in the liquid for 30 seconds. The impregnation rate of this material was 190% in terms of absolute dry weight, indicating a very uniform impregnation state, and the material was then dried at 140° C. for 3 sowing periods to obtain the desired reinforced veneer.

[Comparative Example 2] When the veneer of Example 3 was impregnated with a synthetic resin in the same manner as in Example 3 except that it was dried to an absolutely dry state, the impregnation rate was only 110%, and the impregnation state was also unchanged. It was uniform.

[Example 4] Epoxy resin at 120°C (trade name Epicor 828)
Three veneer plates with a moisture content of 13% and a thickness of 0.5 cm are placed in the liquid.
After immersing for 0 seconds, remove the excess liquid and add 100 parts by weight of ethylenediamine and 1 part by weight of methyl ethyl ketone to both sides of this veneer.
A solution containing 0.00 parts by weight was applied at 80 g/rn' and left for 4 hours. The impregnation rate of this material was 150% on an absolute dry weight basis, and the impregnation was extremely uniform.
After drying for 3 hours, a desired reinforced veneer was obtained.

C Example 5J After immersing a veneer board with a moisture content of 13% and a thickness of 0.8 mm in a solution of 100 parts by weight of TDIfi block isocyanate and 100 parts by weight of ethylene glycol monomethyl ether acetate at 110°C for 2 minutes, the excess liquid was removed. After removing the
It was immersed in a solution containing 100 parts by weight of polypropylene glycol and 150 parts by weight of ethylene glycol monomethyl ether acetate for 7 hours. The impregnation rate of this product is 130% in absolute dry weight terms, and the impregnation is extremely uniform.
Thereafter, it was hot pressed at 160° C. and 8 kg/cm” for 10 minutes to obtain a desired reinforced veneer.

[Example 6] In a solution containing 4110 parts by weight of benzoyl peroxa and 60 parts by weight toluene, 2 pieces of veneer with a moisture content of 60% and a thickness of 1.
After being immersed for a minute, excess liquid was removed, and then the sample was immersed in an unsaturated polyester resin liquid at 130°C for 5 minutes. The impregnation rate of this material was 130% in absolute dry weight terms.

The impregnated state was very uniform, and then this wood veneer was placed on the surface of a 12mm thick plywood board using a urethane adhesive, and was soaked for 5 minutes at a pressure of 130"08 kg/cm". The desired reinforced veneer was obtained by hot pressing to complete the curing of the unsaturated polyester resin and adhesion at the same time.

[Comparative Example 3] When the veneer of Example 6 was impregnated with a synthetic resin in the same manner as in Example 6 except that it was dried to an absolutely dry state, the impregnation rate was only 110%, and the impregnation state was also unchanged. It was uniform.

[Example 7] A veneer with a moisture content of 20% and a thickness of 0.4 ram was immersed for 1 hour in a solution containing 8 parts by weight of tert-butyl peracetite, 100 parts by weight of methyl methacrylate, and 40 parts by weight of ethyl acrylate. After removing excess liquid
It was immersed in an epoxy acrylate resin solution at eao°C for 40 seconds. It was taken out from the liquid. The impregnation rate of this material was 130% in terms of absolute dry weight, indicating a very uniform impregnation state, and the material was then dried at 120° C. for 4 hours to obtain the desired reinforced veneer.

[Example 8] Moisture content 15% in linseed oil liquid heated to 160°C, 1
A veneer plate of am thickness was immersed for 1 minute and then taken out from the solution. The impregnation rate of this material was 140% in terms of bone dry weight, indicating a very uniform impregnation state, and then left at room temperature to obtain the desired reinforced veneer.

[Example 9] Two Toga veneers with a water content of 8% and a thickness of 0.1
After being immersed for a minute, it was taken out of the solution. The impregnation rate of this material was 160% in terms of absolute dry weight, indicating a very uniform impregnation state, and the material was then dried at 100° C. for 24 hours to obtain the desired reinforced veneer.

[Example 101 100 parts by weight of unsaturated polyester resin and ditertiary]
One piece of pine veneer with a moisture content of 13% and a thickness of 0.5 mm was mixed with 8 parts by weight of butyl peroxide and heated to 110°C.
After being immersed for a minute, it was taken out of the solution. The impregnation rate of this material was 140% in absolute dry weight terms, and the impregnation was extremely uniform.Then, the material was hot-pressed at 150°C and 7 kg/ctn' for 3 minutes to obtain the desired reinforced veneer. .

[Example 113] A veneer veneer with a moisture content of 10% and a layer thickness of 0.4 cm was immersed for 20 seconds in an acrylic ultraviolet curable resin liquid heated to 120°C, and then taken out from the liquid. The impregnation rate of this material was 130% in absolute dry weight terms, and the impregnation was very uniform.After that, both sides were irradiated with an ultraviolet lamp with an output of 160 W/c for 3 seconds to form the desired reinforced veneer. Obtained.

[Example 12] A pine veneer with a moisture content of 14% and a thickness of 0.4 mm was immersed for 20 seconds in an unsaturated polyester resin liquid heated to 130°C, and then taken out from the liquid.

The impregnation rate of this material was 130% in terms of absolute dry weight, and the impregnation was very uniform. After that, electron beams were irradiated from both sides at 300 doses on each side to obtain the desired reinforced veneer.

Claims (3)

[Claims] (1) When manufacturing reinforced veneers by impregnating wood veneers with synthetic resins or oils, after immersing the wood veneers with a moisture content of 6% or more in a heated solution of synthetic resins or oils and taking them out. A method for producing a reinforced veneer, characterized by curing synthetic resin or oil. (2) The method for manufacturing a reinforced veneer according to claim 2, characterized in that the temperature of the heating liquid is 100° C. or higher. (3) A method for manufacturing a reinforced veneer according to claim 1, 2, or 3, characterized in that curing is performed by heating.