JPH07137005A - Decorative material using natural material - Google Patents

Abstract

PURPOSE:To stabilize a change in color tone of a surface pattern of a natural material by heat treating the material with a liquid medium and regulating a residual volatile substance to a specific %. CONSTITUTION:A dried natural bamboo, 'mosochiku' is cut, knots are removed, heated in an oil bath in which engine oil of 270 deg.C is used as medium for 2 hours, and set to 45-2% of a residual volatile substance. An external appearance of the thus obtained 'mosochiku' obtains a depth of a delicate change like Bizen stoneware with dense brown color and can be used stably for a long period.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative material, which is made of natural material and can be freely cut and processed.

[0002]

[Prior Art] Natural materials such as wood and bamboo are cut out,
It is widely used as a decorative material after undergoing various processes such as cutting, drying and painting. However, this decorative material changes over time, so the design itself changes over time.

Natural materials such as wood and bamboo are carbonized and are rarely used as decoration materials as charcoal in which almost no residual volatile substances are contained. However, this is very brittle and cannot be freely processed as a decorative material.

Further, as a material for thatched roof, bamboo which has been exposed to smoke from the hearth for a long time and has been discolored has been used as a decorative material under the name of soot bamboo. It is prized as a decorative material, but its supply is extremely limited.

Others, which are only partially burned or partially dyed, are used for decoration.

[0006]

Problems to be Solved by the Invention Natural materials are so diverse that there is no identical pattern or color tone. Naturally, the patterns of natural materials are used as decorative materials. However, natural materials are subject to aging and it is difficult to maintain the original condition. The present invention relates to a novel decorative material which can be freely machined by utilizing features such as patterns of natural materials, has little change over time, and is resistant to insect damage, and a method for producing the same.

[0007]

Means for Solving the Problems The present invention is achieved by heating a natural material with a liquid medium during heat treatment to adjust the residual volatile substances to 45 to 2%.

Bamboo or wood is mainly used as a natural material, but the material is not particularly limited to these two as long as it is strong as a decorative material.

The temperature for heating the natural material needs to be 150 ° C. or higher, the heating temperature is preferably 180 ° C. or higher and 360 ° C. or lower, and 200 ° C. to 280 ° C. is particularly preferable for producing a uniform material.

The medium to be heated is liquid at the heating temperature, and the material is not particularly limited as long as the heating vorticity and safety can be obtained, but usually, resins such as soybean oil, rapeseed oil, white squeezing oil and lard, Polymers of various glycols such as ethylene glycol and propylene glycol, derivatives thereof such as ethers and esters, aliphatic hydrocarbons such as paraffin and wax, aromatic hydrocarbons such as biphenyl and naphthalene derivatives, mineral oils such as silicone oil, and the like. Mixtures of these can be used.

It is necessary that the residual volatile substances in the natural material be 45 to 2%. When the residual volatile substance is 45% or more, almost no change is observed in the material, and when it is 2% or less, the surface is usually only dark black, and it is not strong enough to be treated as a decorative material. When producing such as, the use is limited, such as the need for reinforcement with a resin or the like. Considering handling as a material, the residual volatile substance is preferably 530%, and particularly preferably 715%.

The measurement of the residual volatile substances is carried out by heating the sample at 1000 ° C. for 1 hour in a furnace in which nitrogen is passed, and dividing the weight change of the sample before and after heating by the weight of the sample before heating.

In order to improve the production efficiency, it is desirable that the natural material, which is the raw material of the natural material of the present invention, be sufficiently dried before being heated by the liquid medium.

Further, a method of changing the pattern of the surface of the natural material by partially baking the surface of the natural material before heating with a liquid medium is also a method for producing an excellent decorative material.

[0015]

[Operation] The natural material of the present invention can change the color tone of the surface of the natural material from blue to brown or black depending on the degree of heat treatment with a liquid medium.

In the natural material of the present invention, the natural pattern before heat treatment is inherited while subtly changing.

The natural material of the present invention becomes dense and has a glass-like transparency and texture as the heat treatment with a liquid medium progresses.

The natural material of the present invention can be cut and processed into a shape according to the purpose of decoration.

[0019]

Example 1 60 cm of natural Moso bamboo with a diameter of about 7 cm
After cutting to length and removing the knot, it was heated for 2 hours in an oil bath with an engine oil having a humidity of 270 ° C. as a medium to produce a natural material having a residual volatile substance of 12%. The appearance of this product is dark brown, and a natural material with a subtle change and depth like Bizen ware was obtained. This product had the strength necessary for cutting and was used as a material for ikebana.

[0020]

[Example 2] The dried bamboo shoots that had been dried for one and a half years outdoors were pulled out and put in paraffin at 280 ° C for 1 year.
As a result of heating for a period of time, a bamboo material was obtained in which the surface of the remaining volatile substances was 14% and the surface was fairly brown. This bamboo material and untreated bamboo material were combined to create a fourth fence, and when the portion that was driven into the soil was observed half a year later, corrosion began within the bamboo of the untreated one, but the bamboo material of the present invention No change was observed, and it was found that it can be used stably for a long period of time.

[0021]

Example 3 A commercially available lauan plate material was put into paraffin at 200 ° C. and heated for 30 minutes, whereby a plate material having a yellowish brown surface and 28% of residual volatile substances was obtained. Since this product has a deep luster when polished, it is considered to be used for outdoor exhibits.

[0022]

Example 4 Bamboo grass having a diameter of about 15 mm was cut into a length of 40 cm, and after lightly browning the surface in a gas flame,
3 in an oil bath using tempura oil at a temperature of 200 ℃
Heated for 0 minutes to produce a natural material with 16% residual volatiles. This product has a pattern composed of colors from yellowish brown to black, and was able to be combined with a hand-woven cloth to make a relief, or to make a product with a deep taste as a coat of arms.

[0023]

[Effects of the Invention] The natural material of the present invention is a natural material that has never been seen in the era of mass production and mass consumption, and can be used as a material for decoration and personal products by simple operations. is there. This work using natural materials is a stable material with subtle changes and depths brought about by natural materials. Not only artistic works such as ikebana, but also work materials, do-it-yourself materials, and even construction materials, etc. A wide range of applications are expected.

Claims (4)

[Claims] 1. A natural material prepared by heating a natural material with a liquid medium during heat treatment to adjust the residual volatile substance content to 45 to 2%. 2. The natural material according to claim 1, wherein the material is bamboo or wood. 3. A method for producing a natural material, which comprises heating the natural material with a liquid medium during heat treatment to adjust residual volatile substances to 45 to 2%. 4. The manufacturing method according to claim 3, wherein a natural material which has been subjected to a treatment for forming a pattern on the surface in advance is used.