JPS60154002A - Manufacture of reinforced wood - 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] 〔Technical field〕 This invention relates to a method for manufacturing reinforced wood.

[Background technology]

Conventional reinforced wood has been manufactured by impregnating wood with a monomer such as methyl methacrylate and curing it to form WPC (Wood Niblastic Combination).

However, when the wood is thick or dense, it is difficult to impregnate the inside of the wood with resin.

On the other hand, PC conversion was carried out only near the surface of the wood, and it was not possible to obtain reinforced wood with excellent mechanical strength, dimensional stability, and weather resistance.

[Purpose of the invention]

The object of the present invention is to provide a method for producing reinforced wood that has excellent mechanical strength, dimensional stability, etc., and does not lose its woody feel.

[Disclosure of the invention]

The method for producing reinforced wood of this invention involves impregnating a relatively thin wood veneer with a water-based resin, and then curing it under heat to create a W.
This method is characterized in that a PC veneer is obtained, and after drying this WPC veneer, a plurality of 7-piece veneers are laminated with an adhesive and bonded by pressure to form a 7-rich veneer.

The drawing shows the flitching process 9, in which a plurality of wood veneers 1 obtained by impregnating and curing a wood veneer with a water-based resin as described above are laminated with an adhesive 2 and then molded into a mold 3. A flitch 4 is obtained by pressure bonding, and this is made into reinforced wood.

Examples of the water-based resin include lily resin.

Melamine resin, polyethylene glycol (PEG)
.

Examples include polyethylene glycol monomethacrylate, which may be used alone or in combination of two or more. These resins are applied in the form of relatively low molecular weight polymers or oligomers to wooden veneers by coating or dipping.

When curing the resin, it is preferable to heat and cure the veneer without drying it, and for this reason, a method of curing using moist heat such as steaming is used. In the case of dry heat curing, the surface of the veneer is cured first, making it difficult to obtain a WPC veneer that is uniformly reinforced in the thickness direction.

After curing, allow the veneer to dry. It is preferable to dry the veneer until the moisture content is as low as possible in order to prevent the flitch 4 from curling during the next molding process and improve moldability.

The adhesive 2 used for forming the flitch is not particularly limited, but a polyurethane adhesive can be suitably used.

The thus obtained 7rich 4 has been subjected to WPC treatment over its entirety, and has improved mechanical strength, 9 dimensional stability, etc. compared to conventional methods. Additionally, since it uses a water-based resin, it retains a woody feel, unlike conventional products that have mostly plastic surfaces.

Next, an example will be given and explained.

Example 1: Commercially available water-based area resin and melamine resin f
Mix at a ratio of t100:2'00, and add agathis veneer (1
MM thickness) at a thickness of 130±109β.

The resin was cured while applying steam to this veneer. The steaming time was 2 hours, and the veneer temperature was 95±2°C. Then, the veneer was dried in a hot air dryer at 100 to 200°C to give a moisture content of 10±5%.

A commercially available urethane resin adhesive was applied to the obtained WPC veneer for 10 minutes.
A flitch was obtained by laminating a plurality of the sheets and pressing and bonding them together at 0qβ.

As a result of comparing this flitch with a flitch without resin impregnation, it was confirmed that the bending strength was increased by 30%, and the dimensional stability was increased by 4.
An improvement of 0% was confirmed.

Example 2: PEG: #10 in the resin used in Example 1
When 30% of 00e was used, the dimensional stability of the flitch was improved by about 50%.

Example 3: Almost the same results were obtained even when an Aius veneer was used in place of the Agatis veneer used in Example 1.

〔Effect of the invention〕

According to this invention, the material is uniformly converted into WPc, and various performances such as mechanical strength and dimensional stability are significantly improved, and
This has the effect of producing reinforced wood with a woody feel.

[Brief explanation of drawings]

The drawings are explanatory diagrams showing the flitching process in this invention. 1... WPC veneer, 2... Adhesive, 4... Flitch procedure amendment (view May 18, 1980 Patent Application No. 009262 2, Title of Invention Method for manufacturing reinforced wood) 3. Relationship between the person making the amendment and the case Applicant 4. Agent 5. Date of amendment order, page 4, line 11, "100-200"
100-120”.

Claims (1)

[Claims] Relatively thin wood veneers are impregnated with water-based resin and then cured under heat to obtain wPC veneers, and after drying the 0-arm C veneers, multiple veneers are laminated with adhesive and pressed together. A method for producing reinforced wood, characterized by flitching it.