JP2005297500A - Timber impregnation agent composition imparting durability and dimensional stability to timber, and manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composition related to the development of a timber impregnation agent which is constituted of a natural raw material and a food material in order to increase the durability and the dimensional stability of timber, and a timber processing technique of impregnation. <P>SOLUTION: This composition constituted of a persimmon juice liquid and a citric acid is impregnated into a timber, and thus, durability such as anti-corrosion and insect control, and dimensional stability are realized. In addition, by compressing the treated material, the impregnation treatment contributes to the increase of the durability and dimensional stability. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an aqueous solution obtained by mixing a certain amount of a persimmon juice extracted and collected from a persimmon fruit and an organic acid citric acid by a dip diffusion method, a hot / cold bath method, and a pressure-reduced pressure injection method. By soaking and injecting into the wood, it becomes a wood with improved durability and dimensional stability that does not place a burden on the environment.

Further durability and dimensional stability can be obtained by surface-compressing the wood into which the above-mentioned mixed solution of persimmon astringent liquid and citric acid is injected.

For wood preservatives and insect repellents, injections and coatings used were tar creosote oil, phenolic bentachlorphenyl laurate, triprolphenol, quinoline B-oxyquinoline, naphthenic acid -Based naphthenic acid agent, organotin triptyltin oxide, organoiodine chlorophenyl, iodopropargyl formal, chromium, copper, arsenic, phenol fluorine, borax, boric acid, etc. Because it is a product, its impact on the environment is an issue.

Although compression processing of wood has been widely performed and distributed as compressed processing wood, there has been no wood product that has been compression-processed with wood-buckle liquid-injected wood or wood-wood juice and citric acid mixed wood.

From the current state of the art, the present invention is a treatment agent for antiseptic, insectproof, and durability of wood, which is a product that does not place an environmental burden during manufacturing or construction use, An object of the present invention is to provide a wood injection treatment agent with a mixed composition of citric acid as a food material. And it gives that further antiseptic | preservation, insect repellent, and durability improve by compressing injection-processed wood.

The present invention can achieve antiseptic, insect-proofing, durability, and dimensional stability by injecting into a wood a composition obtained by mixing a certain amount of natural raw material astringency and citric acid, which is a raw material of food, into a certain ratio. Persimmon Shibu has been used as an antiseptic and insect repellent since ancient times in Japan. Citric acid is a substance that improves the insect repellent effect, especially by mixing with persimmon and fixing it in wood.

The wood infused with the mixed composition of persimmon and citric acid is dried and compressed to increase the density of the wood surface, and the strength of the wood surface is improved to improve durability, antiseptic and insect repellent performance. In addition, persimmon astringent is a polymer condensate, which is made into a plastic by drying, improves the durability of the whole wood, and further compresses the wood surface to solidify.

In the detailed description, the present invention correctly indicates the application and the applicable range. Moreover, the kind, shape, form, etc. of the treated wood are not limited in the detailed description of the present invention.

The drenched astringent liquid of the injectable composition used in the present invention is water-soluble, does not change with temperature change, and maintains quality even at a high temperature of 250 ° C. The chemical property is a polymer condensate composed of tannins such as catechin gallate, gallocatechin gallate, catechin and the like, and has a molecular weight of about 15,000. In addition, it has properties such as enzyme inhibition, oxidation inhibition effect, lipid peroxidation inhibition, reducing action, antibacterial action, and deodorizing action.

As a conventional method of using strawberry astringency, it has been used for reinforcement of materials, antiseptic, insectproof, and waterproofing properties by applying to bamboo, paper, fishnet, cloth and wood. At present, the removal of formaldehyde as a sick house substance, the removal of ammonia, trimethylamine, and nicotine as odorous substances has been clarified chemically. be able to. In addition, the amber-injected wood is light red and light black, and is finished with teak wood, rosewood, and Kojiro cedar tone.

Citric acid of the injectable composition used in the present invention is a crystalline organic acid, which is weak in acidity and about 1/3 of acetic acid, and is a substance contained in dried plums, lemons and the like. Currently, starch is used as a raw material and is fermented. The appearance is white or colorless crystals with a molecular weight of 210, melting point of 130 to 150 ° C., high solubility in water, 60% at 20 ° C. and 80% at 100 ° C., and is a weak alkaline harmless substance. .

Crystalline organic acids that are harmless to citric acid are ascorbic acid, aspartic acid, glutamic acid, aconitic acid in citric acid cycle, isocitric acid, α-ketoglutaric acid, succinic acid, fumaric acid, malic acid, oxaloacetic acid Can be used as an injectable composition, but citric acid is most suitable as an inexpensive and stable organic acid.

In the present invention, granular or powdered citric acid is added to room temperature persimmon juice at a ratio of 2 to 15% with respect to 1 part by weight of persimmon astringent liquid, or the final ratio of citric acid is partially mixed in persimmon astringent liquid. It is possible to use a method in which the mixture is warmed to about 100 ° C. and sufficiently mixed and then poured into the persimmon juice again, but the method of temporarily warming the mixture is the best. An effective and stable quality composition can be obtained from the property that tannin and the like of persimmon juice is resistant to heat and does not deteriorate.

The characteristics of wood injecting agent composed of persimmon astringent and citric acid are: prevention of gelation of persimmon astringent, which is a polymer, fragmentation to make it easy to inject into wood, insect repellent effect on termites, It is a composition composed of natural material, such as improved antiseptic effect due to recrystallization of citric acid and plasticization of persimmons, flame retardancy, etc.

The characteristics of the persimmon astringent solution and the citric acid composition will be specifically described. Regarding the prevention of gelation, the molecular weight of persimmon astringent was around 15000, so there was variation in the infiltration and diffusion in the wood during the pouring of the wood, but it was improved by subdividing the molecular weight with citric acid. It is also effective for long-term storage of persimmons. Insect repellents against termites, etc., in the wood infused with citric acid, it retains alkalinity for a long time by recrystallizing when the wood is dried, and further, the persimmon juice liquid is crystallized by plasticizing at the same time of drying. Prevent citric acid from flowing out and emanating from wood. In addition, the density of the whole wood, which is also imparted to antiseptic properties, is increased, and the intrusion of moisture and decaying fungi into the wood is prevented while at the same time maintaining flame retardancy. Therefore, the wood that has been infused with persimmon juice and citric acid composition has improved durability and dimensional stability, and contributes to promoting the use of domestically produced cedar and thinned wood.

The above is the detailed description regarding claim 1 of the present invention. The following description relates to claim 2.

By using strawberry astringent solution and citric acid composition as an injection treatment agent, the injected wood is compressed on one side and many sides of the wood with a plate compressor and roll compressor, thereby further improving durability and dimensional stability. be able to.

In general, wooden products made by compressing untreated wood that is not infused treated wood are widely produced and distributed for furniture, etc., but treated with the infusate of the present invention for the purpose of antiseptic, insecticidal and dimensional stability. There was no compressed wood that was made, and this was realized in the present invention.

Even if wood that has been infused with astringent juice and citric acid composition is compressed with a general-purpose compressor, durability and dimensional stability can be improved, but the compressor can apply temperature to the pressing surface of the compression. Better results. And when adding temperature, it becomes possible from the property that the tannin etc. of persimmon astringent liquid do not change at high temperature.

The temperature of the press surface of the compressor is optimally 150 ° C. to 180 ° C., and the compression rate can be 1% to 65%, but 20% to 30% if it is within the range that does not impair the warmth that is the characteristic of wood. The compression of is good. The compressed wood surface is glossy, has a good appearance, can be used without painting, and contributes to expanding the use of soft cedar.

The range of use of wood that has been infused with amber juice and citric acid composition and wood that has been further compressed is wooden pedestrians, etc. It can be widely used from the same passage, wooden handrails, outdoor stages, etc. to flooring materials, flooring, interior / exterior wall materials, general structural materials, construction materials, etc. as building materials. In addition, it contributes to the expansion of the scope and use of thinned wood generated by forest protection and cultivation.

The above has described in detail the explanation and application range related to the compression treatment of the wood-altered juice and the citric acid composition-treated wood of claim 2.

Development and improvement of wood injection agent and compression processing technology comprising persimmon juice and citric acid composition of the present invention, for example, composition of persimmon astringency and water repellency, antiseptic cypress oil and hiba oil, coconut oil, cypress The use of wood injections in combination with natural oil components such as oil and Hiba oil, coconut oil and citric acid compositions, and compression processing of the injection-treated wood will continue to expand the use of new wood.

Roll press machine made of Fukui Prefecture cedar thinned wood, 22mm thick flooring processed wood, infused with a composition of 5% citric acid solution and 10% water solution made from water solution 10 and water 2 by steam cold bath method The product was compressed to a thickness of 18 mm. In addition, the temperature with respect to the board | plate material at the time of compression was 180 degreeC. The flooring processed cedar board material 40m ² produced above was delivered to a construction company in the prefecture, and the place of use was flooring and some interior wall materials.

The cedar board material injected and compressed with the persimmon juice produced in Example 1 and the citric acid composition is somewhat expensive, but it is a chic house countermeasure type such as warming of cedar, deodorizing effect, removal of formaldehyde, etc. From the evaluation, both the owner and the construction company adopted the same material. In addition, the use resulted in the design and adoption of nursery schools, kindergartens and public exhibition facilities for public works.

Steamed astringent water solution and water 2 and 4 in a ratio of 2% and 4% of each mixed water solution and citric acid were steamed against Yoshino cedar from Nara Prefecture, and veneer veneer thicknesses of 1.2mm, 2mm, 2.5mm and 3mm. Injection treatment was performed by a cold bath method, and a sample of a 4-inch square laminated pillar material was manufactured. The core material of the laminated timber was cedar thinned from Fukui Prefecture, pine produced in Canada, white pine from Canada, and Todomatsu (Hokkaido) from Hokkaido.

In expanding the use of domestically produced cedar, timber and thinned timber, it fully satisfies the conditions necessary for a comfortable living room environment, such as a countermeasure against sick house, deodorant effect, insect repellent effect against termites, safety, etc. Therefore, there was a great response in Tokyo, Osaka and Fukui where exhibitions and briefings were held.

The composition of persimmon water solution and citric acid 7% mixed in the ratio of persimmon astringent liquid 10 and water 2 was injected into the cylindrical processed material and curtain of cedar thinned wood from Fukui Prefecture, and delivered to the power company for wooden shelves. . This was because the antiseptic, insect-proofing, and safety to the natural environment, which were the conditions for adoption, were sufficiently satisfied. The product is also characterized by its ability to be reused, for example, by chipping it after disposal.

Additional orders were made for the above-mentioned injection-treated wood, and wooden stairs and flower beds were produced. Use as a civil engineering material is also promising and contributes to the promotion of the use of thinned wood.

Claims (2)

In improving the durability and dimensional stability of the wood, an aqueous solution containing tannins as a main component and citric acid mixed in a certain ratio is used as a wood preservative, insect diffusion treatment immersion diffusion method, hot and cold bath method, A composition and a production method of persimmon astringent and citric acid, which are imparted to the soundness of the living environment without inflicting the environment by injecting into wood by a pressure-reduced pressure method. In improving the durability and dimensional stability of wood, by applying compression to the wood surface of the antiseptic and insect-proof treated wood according to the composition and manufacturing method of persimmon and citric acid according to claim 1, it is possible to produce a soft woody cedar material, etc. A method for producing compressed wood characterized by imparting durability, dimensional stability, and aesthetics.