JPS60203402A - Method of molding curable neutral woody 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 The present invention aims to improve a composite material of synthetic resin material and wood (commonly referred to as WPC), and in particular to remove acetic acid contained in the WPC material.

In general, wood has a high hygroscopicity and expands and contracts as its moisture content changes, and its shape changes as it expands and contracts. For this reason, when using it not only as a fitting material but also as a building material, the direction and amount of warpage, etc., have been predicted in advance and the layout has been made so that it can be assembled. In addition, straight-grained wood or wood that has the following drying conditions is used for the parts that are out of alignment, especially the tabs.

However, in general, wood itself has high hygroscopicity, and q1
If wood is exposed to extremely humid weather conditions, it is unavoidable that width warping, wave warping, or straightening will occur in wooden house structural materials or building materials.

Also, 4. of the wood itself. ! Due to its nature, it has poor durability, induces rotting, abrasion, etc., is susceptible to insect damage, and is also prone to burnout.

Furthermore, the strength and hardness of wood vary due to differences in structure.
However, since it does not have uniform strength and hardness, it causes uneven wear in wood molded products, as well as warping and
This caused the problem of yelp.

In addition, since ordinary wood contains a large amount of wood acid, the metal parts that come into contact with the wood are likely to rust, and it is especially unsuitable for use with gold 1iA, which is easily oxidized. This is what was said.

In order to solve the inconveniences of common wood, we have developed a wood-polymer composite
Although the development of composite materials as WPC has been progressing, the oxidation value of the molded composite material itself is high, and this may cause problems during construction or with other materials used. 911 stains caused various problems.

The method for forming hardened and neutralized wood according to the present invention was particularly devised in view of the inconveniences in the prior art. Within the temperature range of 100 to 250°C, pour the urea-based resin liquid from the exposed end face of the pipe such as the end of the pipe under a pressure of 11:00°C while inducing destruction of the pipe, cell parts, etc. and heat it to keep the moisture content within 5%, P) 16 to P) 17
After the hardened neutral wood is obtained, it is impregnated with an appropriate resin solution for the purpose.

As a result, the urea-based resin liquid is impregnated into the wood structure, especially the parts of the structure that are fragile and easily destroyed, and is cured in that state, which increases the affinity between urea and lignin, and the impregnation of the resin throughout the wood structure. In this state, uniform hardness is created over the entire area, and warping of the wood and uneven wear of the wall due to variations in hardness are prevented.

In addition, since the hygroscopicity of wood is effectively reduced by the impregnated resin material, the expansion and contraction of the wood composition due to changes in moisture content is prevented, and the resulting warping and encircling occur. The margin was effectively suppressed.

Furthermore, neutralization of wood acid in wood is not ensured through impregnation and hardening with urea-based fat, and its pH value is approximately neutral (t6), making it a material that is susceptible to oxidative corrosion. The assembly is particularly suitable for use.

In order to effectively improve the durability of the hardened and neutralized wood according to the present invention, the method of forming wood with a moisture content of 15% or less is made using Novo fiber resin. The treated wood was impregnated with a liquid, heated and dried in a 7+1N range of 100 to 250°C to undergo hardening and wood acid neutralization treatment, and the processed wood was placed at a point where an appropriate resin was injected. Specific embodiments and considerable design changes associated with these embodiments are planned.

Hereinafter, an example of a typical forming force method for hardening and neutral wood materials according to the present invention will be explained with reference to the attached drawings. First, the material wood (1) has an air-dried moisture content of 15%. After drying, the wood was subjected to +111 treatment, which induces rapid destruction of fragile tissue parts in the wood, such as ductal cell parts and wood cell parts.

Since the destruction of tissue fragile areas due to such drying increases the degree of drying and is greatly influenced by the conditions over time leading to drying, it is customary to reduce the moisture content by vacuum drying means etc. It was planned to keep it within 5%.

In this way, the wood (1) that has been sufficiently dried and the cells in the tissue-fragile parts have been destroyed is usually injected with a urea-based resin liquid from the wood (1)a, especially if it is pressurized or done by a person. It is.

In addition, various methods are planned for this pressurized injection, such as immersion in a pressure tank or a reduced pressure tank, pressure contact with a pressure nozzle, etc. against the butt end surface, and other methods. During immersion and infiltration in a tank, use surfaces other than the edge surface, especially the wood grain surface cut perpendicular to the edge (1
) It is particularly possible to pressurize and inject from b.

The wood (1) into which the urea-based resin liquid has been pressure-injected is heated and dried in a heating device, thereby hardening the injected resin liquid and forcing the contained water to evaporate, filling and hardening the destroyed fragile tissue parts. The present invention provides wood that is sufficiently hardened and has neutral characteristics.

In addition, in the above-mentioned heating and drying, approximately 100 to 250
By drying and curing over time within the Wu'L range of °C, and by controlling the water content within 3 to 5z, the material with a pH of 5 at the time of impregnation with the resin liquid, P) IS
~P) +7 neutral material.

When impregnating with urea-based resin liquid, urea-based resin has a high affinity with lignin and urea. At night, it quickly and evenly infiltrates into the wood tissue, and then heat-drying under continuous conditions hardens the grain of the wood tissue and neutralizes the wood acid contained in the wood. 1jJI.

In this way, resin liquids such as styrene, unsaturated polyester/styrene, styrene/acrylonitrile, methyl methacrylate, acrylic oligomers, etc. are injected into the wood impregnated with urea resin liquid and cured.

The injection of other resin liquids is relatively easy since the internal structure of the wood has already been hardened with the urea resin material, and the injection resin and these hardened wood structures can be injected relatively easily. The infiltration is said to be good, and the infiltration is sufficient to reach every corner of the voids left within the wood.

The wood (1) thus formed is impregnated with a resin injected into the urea-based resin liquid into the destroyed fragile tissue parts, the cracked voids or the broken cell tissues, and hardened.
The fiber structure in the resin and these resins mutually compensate for the strength, resulting in the bending strength of Patent 1.

In addition, the moisture absorption property of the wood (1) is extremely reduced, the warping and facade caused by drying and moisture of the wood (1) are reliably prevented, rot is effectively prevented by 1v, and flame retardant. Sex or something specifically promised.

Also, of course, it is water resistant and insect resistant. It is a hardened wood that can be used in plumbing areas.

Furthermore, despite the apparent new characteristics, the appearance and feel remain the same as that of wood, and the appearance and feel are similar to that of wood. The same thing could be done in .

Furthermore, the wood material according to the present invention effectively neutralizes wood acid, which has not been a problem in conventional WPC. That is, in the process of heating and curing the urea-based resin to be impregnated, the wood acid contained in it is effectively neutralized, and when combined with various gold materials that are particularly susceptible to oxidative corrosion, the wood used is
In addition, it is expected to have a unique use as a material for housing cavities for various substances that are prone to oxidative corrosion.

The hardened, neutral wood material according to the present invention has a unique structure, functions, and effects in the description, and therefore can be used as a material for various fittings or as a material for construction.
r! 4) Materials that can be used effectively as materials, wall materials, floor materials, ceiling materials, plumbing materials, door frames and other cabinet materials, door materials, etc. It is.

[Brief explanation of drawings]

Figure A of the attached drawings is a perspective view showing the end of the wood, and Figure B is a perspective view showing the 11th side of the wood. In addition, in the figure, (1)a...tree 1'', (1)b...not 1
1st side, (1)...It is wood. Patent applicant Sadao Nishihori Patent attorney Minoru Kuwahara Engraving of the drawing (no change in content) Procedural formal document (method) % expression % 3 Relationship with the case of the person making the amendment Patent applicant 4 representative 〒 101 廿03 (8ftB) 3232～
32356 Subject of amendment Description and drawings 8 List of attached documents Corrected drawings 1 The brief description of the drawings in No. 4 of the specification is corrected as follows. 4. Brief explanation of the drawings Figure 1 is a perspective view showing the end of the wood, and Figure 2 is a perspective view showing the grain surface of the wood.・Wood grain surface, (1
)...It is wood. ”

Claims (1)

[Claims] Urea-based resin for wood with moisture content within 15%! ＜＋
Contains 4, and is heated in a temperature range of 100 to 250°C to perform hardening and wood acid neutralization treatment, and inject appropriate resin into this processed wood. A method for forming hardened, neutral wood materials.