JPS5818205B2 - How to process wood into a buried wood shape - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for industrially processing wood into a buried wood shape.

The buried wood is said to have been altered by the dense forest that grew on the site about 4 million years ago or by the accumulation of driftwood during floods, which was covered with a large amount of volcanic ash.

The physicochemical properties of buried wood differ to some extent depending on where it is produced, but because it has a special appearance, etc., it is prized as a craft wood material, a wood furniture material, etc.

In recent years, buried wood as a raw material has been exhausted, so the aim is to produce it industrially, to provide an abundant supply of raw materials in the form of buried wood, and to realize the use of buried wood in wood products.

Hereinafter, the present invention will be explained in detail based on Examples.

When wood is heated and pressurized in an atmosphere containing a considerable amount of oxygen, such as air, carbonization progresses to a porous state, but the workability of the product is poor and it does not form into a wood-like shape.

Therefore, in the present invention, wood is first placed in a pressure cooker, the air inside the cooker is removed (and an inert gas such as argon, krypton, helium, or ammonia, sulfur dioxide gas, carbon dioxide gas, or nitrogen is introduced), and the air inside the cooker is removed. The atmosphere should be 95% or more nonflammable gas.

Next, the temperature inside this pot is heated to a high temperature of 100 to 300 degrees Celsius, and at the same time the pressure inside the pot is increased to 2 kg/c.
It is pressurized to a high pressure state of rri to 100 kfi/crA.

After maintaining these conditions for at least one hour, the temperature and pressure are returned to normal.

As a result, the wood turned brown to the core, and its skin became smooth and shiny, similar to buried wood.

That is, it has been found that when wood is treated at high temperature and high pressure in a nonflammable gas atmosphere, the wood becomes embedded.

As a result of the experiment, it was possible to process the wood into a particularly good buried wood shape under the following conditions, which will be exemplified below.

(Table 1) However, the condition of the buried wood changes slightly depending on the processing conditions, and it has its own special taste, but the following is the range in which it will be in a good condition almost the same as natural buried wood. It turned out to be like this.

(Table ■) Although the above evaluation test was conducted under specific processing conditions, it was also confirmed that this evaluation changed somewhat by changing the processing temperature and processing conditions.

Furthermore, through these various experiments, the following findings regarding the technical components of the present invention were found.

First, the wood used as a raw material is not particularly limited, and any type of natural wood may be used.

Depending on the tree species, even when treated under the same conditions, there will be differences in the appearance color and condition, resulting in a unique taste.

Therefore, depending on the use and the wood species, it may be too light or too soft, so if necessary, we will process the natural wood as it is, or add resin oils such as lignin, linseed oil, wood wax, and tung oil to the wood in advance. It is also possible to use wood that has been pretreated by impregnating it with an inorganic substance such as water glass or volcanic ash.

Next, regarding nonflammable gases, argon, krypton,
Inert gas such as helium or ammonia, sulfur dioxide gas,
The gas may be carbon dioxide or nitrogen, and the gas may be one type alone or a mixture of two or more types.

However, it is necessary that there is no oxygen at all or only a small amount of oxygen is present.

If there is a lot of oxygen, it will burn and become too porous and carbonized.
This is because the processability of the product deteriorates and the unique taste of buried wood is lost.

However, if a small amount of oxygen is included, the brown color will become darker, which will help adjust the hue.

Therefore, a good range of this inert gas atmosphere is 95% or more.

Further, the appropriate temperature range is 100°C to 300°C.

This temperature varies slightly depending on the tree species, but generally it is 20
When the temperature is around 0°C, the wood-embedding becomes the most preferable state.

If this temperature is below 100℃, the wood will not brown easily, and
If the temperature exceeds 00°C, carbonization will progress and the material will become brittle and lose its workability, so it is not suitable.

Furthermore, the pressure is 2kg/crri to 100kg
/crti is appropriate.

The optimal conditions for this will vary depending on the species of raw material wood, its size, thickness to the core, etc., but if it is less than 2 kg/crA, the core will not brown, and the smoothness and luster will not be sufficient, resulting in a desirable buried wood shape. .

Moreover, if the weight exceeds 100 kg/crA, the structure of the wood will collapse and become brittle, which is not a desirable condition.

Lastly, time is a factor, and this also varies greatly depending on the species of raw wood, its size, and its thickness to the core.

However, a good buried wood shape cannot be obtained unless the processing time is at least one hour.

Normally, it takes 4 to 8 hours to process the wood into the desired shape.

As described above, it is necessary to satisfy predetermined processing conditions in order to process wood into a good embedded wood shape, but wood can be processed easily and into a embedded wood shape in a relatively short time.

Moreover, the condition of the buried wood can be adjusted to the desired flavor by adjusting the processing conditions, making industrial production possible and effective as a countermeasure against resource depletion.

Claims (1)

[Claims] 1. Wood is treated in an atmosphere of 195% or more nonflammable gas for 10
A method for processing wood into a lumber shape, characterized by heating the wood to 0° C. to 300° C., pressurizing it to 2 kg/ca to 100 ky/crrt, and subjecting it to high temperature and high pressure treatment at intervals of 1 hour or more. 2. Wood according to claim 1, characterized in that the wood is impregnated with resin oils and/or inorganic salts, and then treated at high temperature and high pressure in a nonflammable gas atmosphere. How to process. 3. Claim No. 3 characterized in that the nonflammable gas is an inert gas such as argon, krypton, helium, or a mixed gas of one or more of ammonia, sulfur dioxide, carbon dioxide, or nitrogen. A method for processing the wood according to item 1 or 2 into a wood-embedded shape. 4. A method for processing wood into a wood-shaped wood-embedding according to claim 1 or 2, characterized in that a small amount of air or oxygen is mixed with the nonflammable gas.