JPH05177608A - Wood treating method - Google Patents

Abstract

PURPOSE:To reduce cell contents, such as tracheid, for the improvement of a fluid permeability to easily infiltrate chemicals or the like into a wood by a method wherein underwater bacteria for selectively attacking tracheids of the wood are bred in water, and the wood is immersed in the water solution of the bacteria. CONSTITUTION:When a wood 1 is to be impregnated with chemicals or resins, firstly sterile water produced in a plate-type sterilizing device 3 is supplied to a water storage tank 2 of a wood treating device A through a pipe 4 and stored therein; simultaneously, air is supplied into the sterile water through a pipe 5; next, a plurality of kinds of underwater bacteria, which have been previously cultured in a culture medium for selectively attacking required parts of the wood, such as tracheid and pits, are injected into the sterile water; bacteria water solution (a) is produced by breeding the bacteria to a fixed amount; and the wood 1 is immersed in the bacteria water solution (a) for attacking the required parts of the wood 1 by the bacteria. In this manner, fluid permeability is improved in the required part of the wood 1 for the easy impregnation of the wood 1 with chemicals or resins.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating wood, which facilitates impregnation of a chemical solution and a resin into the interior of wood.

[0002]

2. Description of the Related Art Conventionally, as a method for impregnating wood with a chemical solution and a resin, the wood is enclosed in a closed container and the inside of the closed container is vacuum-decompressed to force the liquid and gas on the surface of the wood and inside. An extraction method is generally known in which the liquid medicine and the resin to be impregnated are introduced into the airtight container and then pressure is applied to the airtight container to forcibly infiltrate the liquid medicine and the resin into the wood. ing.

[0003]

However, if the wood is left untreated, the lumen of the temporary conduit is filled with a large amount of cell contents, or the wall pores are covered with the cell contents. The flowability of liquids and gases is extremely poor. Therefore, even if the untreated wood is impregnated with the chemical solution and the resin by the conventional method, the impregnation of the chemical solution into the wood is uneven, and
The impregnation rate was poor, the impregnation took a long time, and the running cost increased, and it was difficult to make bleaching, dyeing, resin impregnation, and drying uniform.

Therefore, in order to improve the efficiency of impregnation of chemicals and resins into the interior of wood, wood is treated with plasma,
Insizing the wood surface with needles or water jet cutters is also being considered, but the former has the problem that the equipment is very expensive, and the latter has scratches on the wood surface, resulting in poor commercial value. there were.

The present invention has been made in view of the above problems, and an object of the present invention is to improve the flowability of liquids and gases inside wood and to uniformly impregnate the wood with chemicals and resins. Provided is a method for treating wood, which improves efficiency and efficiency.

[0006]

[Means for Solving the Problems] The inventors of the present invention have noticed that it is quick and easy to dry the rafted logs and the imported wood stored underwater in the harbor for a long period of time. As a result of investigating the tissue structure and water mobility of wood by the underwater storage tree, Psued of several kinds of aquatic bacteria, such as A, B, C, D1, D2 and D3, which selectively erode temporary conduits and wall pores of wood
Omonassp bacilli and Staphylococcus of A1
We found cus sp sp. and succeeded in improving the flowability of liquid and gas inside the wood by attacking the temporary conduit and the wall hole part of the wood by utilizing the erosive action of plural kinds of underwater bacteria.

Therefore, in the present invention, a plurality of types of underwater bacteria having an action of selectively eroding a temporary conduit and a wall hole portion of wood are put in water to grow to a certain amount, and the wood is immersed in the aqueous bacterial solution. It is made to be processed.

[0008]

According to the method of the present invention, a plurality of types of aquatic bacteria in an aqueous bacterial solution selectively attack a temporary conduit or wall hole of wood, and the contents of cells in the temporary conduit or wall hole of this wood Multiple types of underwater bacteria erode objects as nutrients. In this way, multiple types of aquatic bacteria erode the cellular contents in the temporary conduits and wall holes of wood, reducing the cellular contents in the temporary conduits and wall holes of wood, and Improves gas flow.

[0009]

EXAMPLES Hereinafter, the method of the present invention will be described based on specific examples shown in FIGS.

FIG. 1 shows a wood treating apparatus (A) used for carrying out the method of the present invention.
Is supplied with sterile water produced by, for example, a plate-type sterilizer (3) through a pipe (4) into a water tank (2) in which the wood (1) is stored.
Air (oxygen) required for respiratory activity of underwater bacteria is piped (5)
It is configured to be supplied into the sterile water supplied into the water tank (2) through.

FIG. 2 shows a chemical liquid impregnating device (B) for impregnating wood (1) with a chemical liquid. This chemical liquid impregnating device (B) is an impregnation container (6) designed to withstand pressure with steel or stainless steel having high strength. The inside of the impregnation container (6) is pressurized by supplying a high-pressure (about 20 kg / cm ² ) gas into the inside of the impregnation container (6) through the pipe (8). The inside of the impregnation container (6) is depressurized by evacuating. Further, this chemical solution impregnating device (B) stores the chemical solution to be impregnated in the impregnation container (6) by supplying the chemical solution to be impregnated into the wood (1) in the impregnation container (6) through the pipe (9). And circulate the impregnated chemical liquid stored in the impregnation container (6) as necessary by a chemical liquid circulation heating device (13) including a circulation pump (10), a heat exchanger (11) and a pipe (12). The impregnated chemical liquid stored in the impregnation container (6) is heated by circulating it, and the pipe (1
4) is configured to be discharged through.

Next, the method of treating wood according to the present invention will be described in sequence.

In the method of the present invention, a plurality of types of underwater bacteria that selectively erode temporary conduits and wall pores of wood (1) are previously cultured in a medium.

First, as shown in FIG. 1, aseptic water produced by a plate type sterilizer (3) is supplied into a water tank (2) of a wood treating apparatus (A) through a pipe (4). While storing water, the air required for respiratory activity of underwater bacteria is supplied through sterile water stored in the water tank (2) through the pipe (5). Subsequently, in sterile water stored in the water storage tank (2), a plurality of types of underwater bacteria that selectively erode temporary conduits and wall holes of the wood (1) cultured in the medium as described above. And a plurality of types of underwater bacteria are grown in sterile water to a certain amount to prepare an aqueous bacterial solution (a). After that, when the wood (1) is dipped in the aqueous bacterial solution (a), a plurality of types of aquatic bacteria in the aqueous bacterial solution (a) are selectively introduced into the temporary conduit or wall hole of the wooden (1). Attack and
A plurality of types of aquatic bacteria as nutrients erode the contents of cells in the temporary conduits and wall holes of this wood (1) at a speed of about 5 mm / 7 days. In this way, multiple types of aquatic bacteria erode the contents of cells in the temporary conduit and the wall of the wood (1), and the contents of cells in the temporary conduit and the wall of the wood (1) are reduced. As a result, the flowability of liquid or gas inside is improved. And, multiple kinds of aquatic bacteria die when they completely erode the cell contents of the temporary conduits and wall pores of wood (1), but the residual aquatic bacteria are still used in the subsequent heating step and exposure step. It will be killed by hydrogen peroxide.

As described above, the wood (1) is treated with underwater bacteria to improve the flowability of liquid or gas inside the wood (1), and then the wood (1) is impregnated with the chemical liquid. (B) Impregnates with the chemical solution. That is, after the wood (1) is sealed in the impregnation container (6), the gas in the impregnation container (6) is exhausted through the pipe (8) to bring the interior of the impregnation container (6) into a vacuum decompressed state. Liquid and gas on the surface and inside of 1) are forcibly removed. After that, the impregnating chemical liquid is supplied through the pipe (9) in the impregnation container (6) to immerse the chemical liquid in the wood (1), and then a high-pressure gas is supplied through the pipe (7) in the impregnation container (6). Then, the inside of the impregnation container (6) is heated to a high temperature, and the wood (1) and the chemical solution are pressurized. By soaking the chemical solution in the wood (1) and pressurizing the chemical solution in this way, the chemical solution is forcibly penetrated into the wood (1), and the chemical solution is evenly and surely inside the wood (1). Is impregnated into.

As in the above-mentioned embodiment, the chemical solution is used after improving the flowability of the liquid or gas inside by utilizing a plurality of types of aquatic bacteria that selectively erode the wood (1) in the wood treating apparatus (A). If the chemical solution is impregnated with the impregnation device (B), the chemical solution can be uniformly and efficiently impregnated, and even when the chemical solution is dried after the impregnation, it can be uniformly and in a short time (about 1/3 of the conventional time). It is possible to dry.

By the way, as a result of a comparison experiment of wood treated by the method of the present invention and untreated wood in terms of impregnation efficiency and drying efficiency, for example, when impregnated pine, which is very difficult to impregnate, was impregnated with resin, Resin impregnation rate in treated wood is 5
%, The wood treated with the method of the present invention had a resin impregnation rate of about 60%, which was significantly improved. Also,
When the Japanese cedar wood was dehumidified and dried, the untreated wood required 21 days, whereas the wood treated by the method of the present invention could be shortened to 7 days and 1/3.

In the above embodiment, the wood (1) was immersed in the aqueous bacterial solution (a) without sterilization. However, the wood (1) was previously treated with steam at high temperature and high pressure in a wood sterilizer. If this is done, the valve called the wall of the cell wall will be damaged and bacteria in the water will easily invade, and harmful bacteria will be killed, and the impregnation of air and resin into the wood will be uniform and efficient. Can be further improved. Further, in the above-mentioned embodiment, the aqueous bacterial solution is described as one in which a plurality of types of underwater bacteria are put in sterile water produced by a plate type sterilizer, but the sterile water is not limited to sterile water.

[0019]

As described above, according to the present invention,
Utilizing the erosive action of several types of underwater bacteria that selectively erode, the flowability of liquids and gases inside wood can be improved, and bleaching, dyeing, resin impregnation, drying, etc. can be made uniform and high quality. It is possible to obtain various products and to significantly reduce the running cost by increasing the impregnation efficiency.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an example of a wood processing apparatus used for carrying out a wood processing method according to the present invention.

FIG. 2 is a schematic configuration diagram showing an example of a chemical liquid impregnation device.

[Explanation of symbols]

 A wood treatment device B chemical liquid impregnation device 1 wood 2 treatment tank 3 plate type sterilizer 6 impregnation container a bacterial aqueous solution

Claims (1)

[Claims] 1. A plurality of kinds of underwater bacteria having an action of selectively eroding a temporary conduit or a wall hole of wood are put in water to grow to a certain amount, and the wood is immersed in an aqueous solution of the bacteria for treatment. A method for treating wood, which is characterized in that