JP2000127109A - Manufacture of wood chip processed article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the shortcomings of a ceramic tile such as breakage, heavy weight or destruction due to freezing/peeling in a cold area by treating wood chips under reduced pressure for a specified time while the wood chips are soaked in a resin solution and leaving the wood chips alone for a specified time under normal pressure or in a pressurized state while the wood chips are soaked in the resin solution and further taking the wood chips out of the resin solution to cure the resin solution in the wood chips. SOLUTION: First the wood chips 1 are subjected to a reduced pressure treatment for a specified time while the wood chips 1 are soaked in a resin solution 3. And then a vacuum suction by a vacuum device is stopped and the interior of a hermetically sealed container 4 is opened into an atsmophere to be left alone under normal pressure for a specified time. The wood chips 1 are still soaked with the resin solution 3 and the voids in the spots where air is removed of the wood chips 1 are impregnated with the resin solution 3 so that the permeation of the solution 3 into the voids take place. After the wood chips 1 are sufficiently impregnated with the resin solution 3, the lid 4b of the container 4 is opened to remove a tank 2 to the outside and the wood pieces 1 are taken out of the resin solution 3. Thus it is possible to eliminate the warping or moisture-absorbing characteristics of the wood such as transverse and longitudinal warpages, bending or twisting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a processed piece of wood suitable for a wooden tile or the like.

[0002]

2. Description of the Related Art Up to now, ceramic tiles have been mainly used for construction purposes and have been widely used for indoor bathrooms and toilets.

[0003]

However, since ceramic tiles are made by firing clay, they are cracked, heavy,
In a cold region, there are drawbacks such as delamination caused by freezing. In addition, ceramic tiles feel cold in toilets in the winter season and feel cold when touched, and are not well-received by elderly people. Improvements have been demanded for an aging society in the future. Under these circumstances, for example, Japanese Patent Laid-Open No.
No. 652 has proposed a wooden tile or the like. However, the wood tile of the publication is impregnated with a urea-formaldehyde-glyoxal precondensate and its surface is coated with a urethane resin to reduce the expansion and contraction of the size of the wood tile, and is completely eliminated. It was not something.

[0004] The present invention solves the above problems,
Eliminates nearly 100% of the sloping, vertical, bending, twisting and other crazy properties of wood and its ability to absorb moisture, and further reduces defects such as peeling and destruction due to freezing in heavy cold areas where ceramic tiles break. In addition, it is an object of the present invention to provide a method for manufacturing a processed piece of wood that also eliminates the coldness of winter tiles.

[0005]

In order to achieve the above object,
The gist of the invention according to claim 1 is that, while a piece of wood having a predetermined shape is immersed in a resin liquid, a decompression process is performed for a predetermined time, and furthermore, a state where the piece of wood is immersed in the resin liquid under normal pressure or under pressure. A predetermined time, and thereafter, removing the wood piece from the resin liquid, and curing the resin liquid in the wood piece to obtain a woody product. Here, the curing method of “curing the resin liquid in the wood chips” includes curing by a chemical reaction and curing by drying. Claim 2
The method for producing a processed piece of wood according to the invention described in claim 1,
A method of manufacturing a processed piece of wood, comprising using a square plate having a predetermined thickness for the piece of wood, and further curing the resin liquid in the piece of wood to form a woody product, and then applying a finish coating treatment to the surface of the woody tile. It is in. According to a third aspect of the present invention, there is provided a method for manufacturing a processed piece of wood according to the first or second aspect, wherein the viscosity of the resin liquid is set to 30 to 100 centipoise.

[0006] As described in the first aspect of the present invention, the decompression process is performed for a predetermined time while the wood pieces are immersed in the resin solution, and further, the wood pieces are immersed in the resin solution for a predetermined time under normal pressure or under pressure. By doing so, the air contained in the inside of the wood piece and in the resin liquid is reliably expelled, and the resin liquid can be impregnated therein. Therefore, the product obtained by the hardening treatment has a high hardness and eliminates the problem of swelling of a piece of wood. further,
The width and vertical sleds, which are mentioned as bad properties of wood chips,
Also prevents various irregularities such as bending and twisting. And
Since the main material is a piece of wood made of wood, it is light and provides the comfort and calmness of wood. When used in tiles in toilets and bathrooms, it creates a warm atmosphere even in winter, unlike ceramic tiles. According to the invention of claim 2, when the surface of the wood product obtained by curing the resin liquid in the wood chip is subjected to finish coating treatment, the surface becomes a high quality product (wooden tile) having a smooth and glossy surface. Its use can be expanded. When the viscosity of the resin liquid is set to 30 centipoise to 100 centipoise, impregnation of the wood piece with the resin liquid can be smoothly advanced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for manufacturing a processed wood piece according to the present invention will be described in detail. 1 to 7 show an embodiment of a method for manufacturing a processed wood piece of the present invention. FIG. 1 is a perspective view of the wood piece, FIGS. 2 to 6 are explanatory views of a manufacturing process of the processed wood piece, and FIG. FIG.

[0008] In the method of manufacturing a processed wood piece, first, a wood piece 1 cut into a predetermined shape is prepared from dried wood. For example, in FIG. 1, a tree is sawn into square lumber, and the edge of the tree is cut into a square plate. This embodiment is 10 cm × 10 cm
It is a square plate of about 5 mm. Wood piece 1 of this square board
Has the drawback that it rots or burns as it is. In addition, the presence of conduits, temporary conduits, and the like that send moisture to the leaves, and gaps between cells, causes the wood to have a crazy property and a property of absorbing moisture. The tree constituting the wood piece 1 is not particularly limited, and softwood and hardwood can be used. Here, in the case of a cedar material or the like actually used, if the thickness is about 5 mm, there is also a problem that it is easily broken. Depending on the method of cutting the tree, a piece of wood 1 such as a wood opening pattern (a in FIG. 7), a grain pattern (b in FIG. 7), a straight grain pattern (c in FIG. 7) can be obtained. In addition, any one of the wood patterns 1 may be selected.

Next, the wood piece 1 is immersed in the resin solution 3. The plate-like wooden piece 1 is placed in the tank 2 and then the storage can 8
Pour the resin liquid 3 in the tank 2 into the tank 2
Is immersed (FIG. 2). In the case where the wood product 6 as a product is required to have transparency, the resin solution 3 may be a resin solution of an epoxy resin (used in the present embodiment), an acrylic resin, a non-yellowing polyurethane, a polycarbonate, or a solvent of a butyral resin. A solution or the like is used. When the wooden article 6 does not require transparency, a phenol resin, an unsaturated polyester resin, an allyl resin, or the like is used as the resin liquid 3. The resin liquid 3 is selected in consideration of the hardness, elastic modulus, transparency, various mechanical strengths and the like when it becomes a cured product. The epoxy resin liquid used in the present embodiment is a solvent (here, toluene)
And the viscosity is reduced to 30 centipoise (hereinafter "cp").
) To 100 c.p. Initially, about 5000c.
Although the epoxy resin liquid of p. was used, it was difficult to impregnate the wood piece 1. By using the epoxy resin liquid having the above viscosity, the fluidity is increased and the wood product 1 is easily penetrated, and a desired wood product 6 is obtained.

[0010] Thereafter, a decompression treatment is performed while the wooden piece 1 is immersed in the resin liquid 3 (FIG. 3). First, the tank 2 itself in which the wood piece 1 is immersed in the resin liquid 3 is placed in the closed container body 4.
Place in a. Then, the lid 4b is closed, and vacuum suction is performed from the nozzle 41 using a vacuum device (not shown) (FIG. 3).
Arrow), and the inside of the sealed container 4 is depressurized. Predetermined time,
The air contained in the wood chip 1 and the resin liquid 3 is degassed under reduced pressure.

[0011] The degree of vacuum in the sealed container 4 is 400 mmHg vac ~
It is in the range of 700 mmHg vac. If the pressure is smaller than 400 mmHg vac, the effect of the decompression treatment can hardly be expected.
This is because if the degree of vacuum exceeds 0 mmHg vac, a large-scale vacuum device is required. Another reason is that in the manufacture of the processed piece of wood of the present invention, a product of sufficient quality is obtained in the range of 400 mmHg vac to 700 mmHg vac. The inside of the sealed container 4 is maintained at this degree of vacuum for a predetermined time. By reducing the pressure in the closed container 4, the air present in the wooden piece 1 is extracted. The thickness of the wooden piece 1 is about 5 mm to 100 mm and the wooden piece 1
Has a large specific surface area, so that air is smoothly extracted.
The air present in the wood pieces 1 is released as bubbles 5 into the resin liquid 3 and is removed by vacuum suction. Closed container 4
The longer the time during which the inside is kept under reduced pressure, the better, but the total air release amount in the wood piece 1 with respect to the time becomes a horizontal bi-state with the passage of time as shown by a logarithmic curve. Initially, the air emission is high, but thereafter the air emission does not increase significantly over time. In this embodiment, the degree of vacuum in the sealed container 4 is set to about 500 mmHg vac, and the vacuum is applied for about 10 minutes (10 minutes to 20 minutes). If the time is longer than 10 minutes, the curing reaction of the epoxy resin proceeds.

As described above, after performing the decompression treatment for a predetermined time while the wood piece 1 is immersed in the resin liquid 3, the vacuum suction by the vacuum device is stopped, the inside of the closed container 4 is released to the atmosphere, and the pressure is reduced to normal pressure for a predetermined time. Leave (Fig. 4). The wood piece 1 is still immersed in the resin liquid 3, and the resin liquid 3 is impregnated and penetrates into voids in the wood piece 1 where air is removed. The voids inside the wood pieces are impregnated with the resin liquid 3 until it is close to 100%. Here, the resin is impregnated into the wood piece 1 under normal pressure. However, even if the pressurized air is switched from the compressed air supply source (not shown) into the closed container 4 by using the nozzle 41 to perform the pressurizing process. Good. In the pressurized state, the wood chip 1 can be impregnated with the resin liquid 3 more quickly and more reliably, which is preferable. After a predetermined period of time, the wood chip 1 is sufficiently impregnated with the resin liquid 3, the lid 4 b of the closed container 4 is opened, the tank 2 is taken out, and the wood chip 1 is taken out of the resin liquid 3.

Thereafter, the resin liquid in the wooden piece 1 is cured. Here, it was cured indoors as shown in FIG. The pieces of wood 1 are arranged on a sheet so as not to be adhered one by one, and the resin liquid 3 in the piece of wood 1 is cured. Of course, it is also possible to use a heating device or the like instead. By performing such a treatment, a desired wood product 6 obtained by curing the resin liquid 3 impregnated in the wood piece 1 is obtained.

Further, in the present embodiment, a surface layer 7 is formed on the surface of the above-mentioned woody product 6 in which the wood piece 1 is impregnated with the resin liquid 3 and hardened, thereby forming a surface layer 7, thereby finishing the woody tile P ( (Fig. 6). If a shiny surface finish is not required, this treatment step is omitted.

A performance test of the thus-obtained woody product 6 of the present invention was carried out. Moisture Absorption Test The woody product 6 of the present embodiment was immersed in water for 24 hours. The weight increase after immersion was about 0.3 wt% to 0.6 wt%, and it was confirmed that the moisture absorption of the wood was reduced. On the other hand, the weight of the original wood piece 1 (comparative product) not impregnated and cured with the resin liquid increased by 80% by weight.

Deformation Test The woody product 6 of this embodiment was immersed in water for 24 hours. The average rate of change in the length of each side after immersion was 0.1 in the thickness.
It was 4% and the edge length was 0.23%, and it was confirmed that there was a significant decrease in the out-of-order property. By the way,
Comparative product 1 was immersed in water for 2 hours and was 3.4% (3 to 3%).
4%), the length of each side changed.

In the woody product 6 produced by the method for manufacturing a processed wood piece having the above-described structure, the voids in the wood piece 1 are hardened with a hardened resin so that there are no gaps, so that the mechanical strength is greatly improved. Even if it is a piece of wood 1 that can be easily broken by hand (a piece of wood with a straight grain pattern that is easy to crack, or a piece of wood thinned with a tree such as cedar wood, etc.), it is extremely difficult to break it once it is finished into a wood product 6. become.

Further, the disadvantage of peeling failure due to freezing, which is observed in ceramic tiles, is also eliminated. Tiles made by firing clay, such as ceramic tiles, tend to contain moisture inside, and in cold regions, etc., freezing and expansion of moisture causes delamination and destruction. However, in the woody product 6 and the woody tile P of the present invention, the voids of the wood piece 1 are almost completely filled with the resin, and the structure is such that moisture is hardly penetrated. In fact, in a freezing test performed at the Mie Prefectural Chemical Technology Promotion Center Forestry Technology Center, woody products 6 of the present invention immersed in water for 24 hours and
The mixture was left in a freezing room at about 100 hours for about 100 hours and then in a freezing room at minus 85 ° C. for 20 hours to observe the progress. No abnormalities such as delamination were observed. Further, as is clear from the performance test results, the woody product 6 and the woody tile P of the present invention are impregnated with the resin liquid 3 and hardened so that there is no gap into the wood piece 1 so that the wood is messed up. Eliminates the difficulties of absorbing properties and moisture.

In the above-mentioned publication (JP-A-4-20652), a protective layer is formed by impregnating a dimensional stabilizing resin as a first step and coating a resin for enhancing waterproofness as a second step. . Since the coating is performed on the entire surface, there is a problem that if the protective layer is broken, the waterproofness is reduced. In the present invention, the same resin liquid is hardened both inside and outside the wood piece, and no protective layer is required. As for the decompression treatment, the technology disclosed in Japanese Patent Application Laid-Open No. Hei 4-20652 has to secure a high degree of vacuum of 30 mmHg, that is, about 730 mmHg vac, whereas in the present invention, 400 mmHg vac to 700 mmHg v
Does not require a very high degree of vacuum with ac. Resin liquid viscosity 30
By setting to cp to 100 cp, it is possible to impregnate the wood piece with the resin liquid in a short time without requiring a large-scale vacuum facility.

Further, the main product of the wooden article 6 and the wooden tile P is the wood piece 1, which is lighter than the ceramic tile. The disadvantage that the main component 1 is easily burned and rots is also changed. The resin is considered to be less flammable than the wood, and is hardened so that there is no gap inside the wood. ing.

Furthermore, since the woody product 6 and the woody tile P are mainly made of the wood piece 1 and the texture of the wood gives a warm feeling, the woody product 6 and the woody tile P can be used as a tiled interior material in a bathroom or the like, so that they can be used as cold as ceramic tiles. Will not give. Also, even when actually touching it in winter, it does not have the drawback of being cold unlike ceramic tiles. Wood products 6 and wood tiles P using a transparent resin such as an epoxy resin give the viewer a sense of calm and calm for the viewer. It is also possible to produce woody products 6 and wooden tiles P with a wood grain pattern emerging and colored with resin, so that colorful woody products and wooden tiles P can be provided according to the demands of customers.

In addition, when the wood tile P is subjected to the finish coating treatment, the surface is smooth and glossy, giving a sense of quality. It can be used not only as a substitute for ceramic tiles in bathrooms and toilets, but also as wood bricks, picture frames, window frame materials, and various wood processing decorative articles. When the resin is buried in a conduit, a temporary conduit, or the like, the product of the present invention can transmit light when the thickness is small. Therefore, it can also be used as a translucent interior material in an entrance hall or the like.

In the present invention, the present invention is not limited to the embodiment described above, but can be changed within the scope of the present invention according to the purpose and application. The shape, size, material and the like of the wood piece 1, the tank 2, the resin liquid 3, the surface layer 7 and the like can be appropriately selected within the scope of the present invention according to the use.

[0024]

As described above, the method for producing a processed piece of wood not only overcomes problems such as freeze-peeling destruction in heavy cold regions where ceramic tiles are broken, but also solves problems such as expansion and contraction and swelling of wood. In addition, it has an excellent effect such as being able to be used for various wood decorations by performing surface treatment.

[Brief description of the drawings]

FIG. 1 is a perspective view of a wood piece in one embodiment of the method for manufacturing a processed wood piece of the present invention.

FIG. 2 is an explanatory view in which a piece of wood is immersed in a resin liquid in a process of manufacturing a processed piece of wood.

FIG. 3 is an explanatory diagram in which a decompression process is performed while a piece of wood is immersed in a resin solution.

FIG. 4 is an explanatory view showing a state in which a wood piece is impregnated with a resin liquid after a decompression process.

FIG. 5 is an explanatory perspective view showing a state where a piece of wood is taken out and dried.

FIG. 6 is an explanatory sectional view of a wooden tile.

FIG. 7 is a front view showing types of wood pieces.

[Explanation of symbols]

 1 wood chips 3 resin liquid 6 wood products P products (wood tiles)

Continuation of the front page F term (reference) 2B230 AA15 AA16 AA22 BA01 CB25 CC04 DA02 EA11 EA14 EA20 EB02 EB03 EB05 EB13 EB28 EC02 EC24

Claims (3)

[Claims] 1. A pressure reducing process is performed for a predetermined time while immersing a piece of wood in a predetermined shape in a resin solution, and further, at a normal pressure or under a pressurized state while immersing the piece of wood in the resin solution, Thereafter, a method of manufacturing a processed piece of wood, wherein the wood piece is taken out of the resin liquid, and the resin liquid in the wood piece is cured to obtain a wood product. 2. The wooden tile according to claim 1, wherein a square plate having a predetermined thickness is used as the wooden piece, and a resin material in the wooden piece is cured to obtain a wooden product, and the surface of the wooden product is subjected to a finish coating treatment. Manufacturing method of processed wood chips. 3. The resin liquid has a viscosity of 30 centipoise or less.
The method for producing a processed wooden piece according to claim 1 or 2, wherein the centrifugal force is 100 centipoise.