JPS5979717A - Method of treating woody 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 treating wood materials.

One of the major drawbacks when using wood materials as flooring materials is that they have low strength and hardness. Therefore, the so-called WP
C processing (Wood P/astic Com1) i-n
Conventionally, wood materials have been modified by WPC treatment, but this WPC treatment has the problem of complicated processing steps and poor slicability.

The present invention has been made in view of the above points, and is characterized in that wood materials are treated with polyethylene dilicol methacrylate.The present invention will be described in detail below.

Polyethylene glycol methacrylate (Po/yE
tb71ene G17col * Metha Aa
r)'1ate (hereinafter abbreviated as PEGMA) is polyethylene diglycol with methacrylate attached to the end with an ester bond. Its structural formula is 1, and because it has a double bond, it cannot be easily exposed to heat or light irradiation. When given a polymerization promoting factor, it polymerizes and becomes a polymer resin.

An example of the treatment of wood materials using PEGMA will be described. First, wood materials can be treated with PEGMA during dyeing. In other words, in this case, a sliced wood veneer obtained by slicing a log is used as the wood material, and this sliced wood veneer is dyed in the color of the summer wood or spring wood of the natural tree. However, PEG in the staining solution
MA is added to allow PEGMA to act on the sliced veneer.

When the sliced veneer is immersed in a staining solution containing PEGMA, PEGMA is impregnated into the sliced veneer along with the staining solution. When this sliced veneer is heated and dried, PEGMA is polymerized and can increase the strength and hardness similar to WPC treatment. In this case, the impregnated and polymerized PEGMA has excellent light resistance, so that the light control properties of the sliced veneer can be improved. In addition, the polyethylene dilicol part of PEGMA acts as a surfactant in the staining solution, which improves the stainability of sliced veneers, shortens staining time, and makes staining uniform. be. Sliced veneers dyed summer wood color and spring wood color in this way are made into a laminated flitch by laminating the summer wood color and spring wood color pieces alternately with adhesive and pressing them together. By slicing this laminated flitch on a plane that intersects the laminated surface, the sliced veneer in the summer wood color appears as the summer wood part, and the sliced veneer in the spring wood color appears as the spring wood part, creating a decorative structure with a wood grain pattern. It is possible to obtain a veneer.

This decorative veneer is used as a veneer and attached to a surface such as plywood. Here, since the PEGMA impregnated into the veneer and polymerized is mainly composed of polyethylene diglycol, it is more plastic than the WPC resin (for example, methyl methane acrylate resin), and the slicability when slicing the assembled flitch is reduced. There is no such problem, and it is possible to eliminate the occurrence of so-called eye puncture defects.

Next, we will specifically explain the two examples using 10 examples.
do.

<Example J> PEGMA in the staining solution (n = 3 in formula I in art.
50) was added in 1 W/V%, and a rotary sliced single sheet metal was impregnated with this for staining. Staining time is PEGM
The time was reduced by 30 minutes compared to when A was not added, and the staining was uniform. This dyed veneer is 90~io
The dyed veneer was heated with o'CK and dried, and a laminated flitch was prepared from the dyed veneer according to a conventional method, and the laminated flitch was sliced to obtain a decorative veneer for veneer. The eye blur defect rate during this slicing was 12%, which was an improvement over the 20% of the 700 slices that did not use PEGMA. Improvements in the light resistance and strength of decorative veneer veneers were also observed.

Next, other aspects of processing using PEGMA will be explained. In this case, sliced veneer KPEGMA obtained by slicing raw wood is applied, the PEGMA is cured by light irradiation and heating, and the sliced veneer is dyed in summer wood color or spring wood color in the next blowing. After that, the sliced veneer is subjected to the process of creating and slicing an assembled flitch in the same manner as described above. In this way, gloss can be imparted to the sliced veneer by applying and curing the PEGMA, and a so-called tarnished feeling can be expressed. In addition, the surface active effect of PEGMA as mentioned above improves staining properties, so if PEGMA is applied partially to the sliced veneer, the applied area will be dyed darkly during staining, and the color will be transferred to the sliced veneer. It can express unevenness. Furthermore, P.E.
As mentioned above, since GMA has plasticity, there is no possibility that the slicability will deteriorate. Incidentally, similar to sliced veneers, veneer decorative boards are sometimes manufactured using non-woven fabric, but in this case, the non-woven fabric is coated with PEGMA similar to the above.
processing can be performed.

The above-mentioned example will be explained in detail with reference to Examples.

<Example 2> After applying PEGMA (n=350) to a sliced veneer, it was heated and cured by -C polymerization, and this sliced veneer was printed and dyed in the color of pine summer wood, and this sliced veneer was used to dye PEGMA (n=350). By making a laminated flitch and slicing it, a decorative veneer with a pine resin feel was obtained.

<Example 3> PEGMA (n=350) was coated on a nonwoven fabric and heated to polymerize and harden the PEGMA. After dyeing this nonwoven fabric in the color of a test material, it was coated alternately with the sliced veneer through a layering agent. -A laminated flitch was created by laminating the flitch, and by slicing, a decorative veneer board having a glossy wood grain pattern on the anti-reflection layer was obtained. Incidentally, as the non-woven fabric, a fabric dyed in advance in an anti-oxidant color can also be used.

Next, a third aspect of processing using PEGMA will be explained]. In this product, PEGMA is used as a paint and is applied to the surface of wood materials such as decorative veneer veneers. In this case, PEGMA is preferably used in combination with TiO2. Then, a coating liquid prepared with a composition of 30±5 parts by weight of PEGMA (n=90 to 350 is preferable), 2±05 parts by weight of TiO2, and 70±10 parts by weight of water is applied to the surface of the wooden material. PE by heating at a temperature of 80°C or higher
Cure GMA. In this way, the surface of the wood material is coated with PEG.
By treating with MA, the light resistance of wood materials can be improved. When PEGMA is used alone, a strong yellowish tinge appears and the brightness of the wood material decreases, but when used in combination with TiO2, the brightness increases and the yellowish tinge weakens, and when both are used together, the original color of the wood material It is possible to improve light resistance without changing the The relationship between the amount of PEGMA and Ti02 used and the degree of yellowing is shown in the table below.

Margin below The above will be explained using an example.

<Example 4> PEGMA (n=”aso) 30 parts by weight, Ti02
(Paste-like) Apply a coating solution containing 2 parts by weight and 70 parts by weight of water to the surface of a light-colored decorative veneer at a coating amount of 3y/scale, and dry in a hot air dryer at 90"C for 10 minutes. It was dried by heating.The color difference before and after coating was ΔE=3.The light resistance color difference after 48 hours of carbon arc was ΔE=3.5.

Agent Patent Attorney Ishi 1) Choshichi 6

Claims (1)

[Scope of Claims] ・II Treatment of wood material characterized by treating with wood 4'J' f polyethylene glycol methacrylate (method. 121 Using sliced veneer r as the wood material, polyethylene glycol methacrylate k IFh A method for treating wood materials according to item 1 of the claimed scope of the patent, characterized in that the treatment with polyethylene glycol methacrylate is carried out by immersing sliced veneers in a dyeing solution. +31 Wood materials As a slice IIL &" A method for treating wood materials as described in item 1 of the range of TIF Tatehi. (4) The method is characterized in that the treatment with polyethylene glycol methacrylate is carried out by coating the surface of the wood material with polyethylene dilycol methacrylate. A method for treating wood materials according to claim 1.