JPH057162B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for producing patterned soot bamboo useful as a material for construction, furniture, or crafts.

[Conventional technology]

Traditionally, sooty bamboo has been used as a material for furniture and crafts, etc. Bamboo used to construct the roofs of traditional Japanese-style thatched houses has been damaged over many years by the smoke rising from the hearth. It was obtained as waste material when re-thatching the roofs of such thatched houses.

However, in recent years, the number of such thatched houses has been decreasing, and it is predicted that the supply of soot bamboo will almost disappear in the future.

However, sooty bamboo, which is used as a material for furniture and crafts, is becoming increasingly valuable due to the lack of alternative materials.

Under the above-mentioned circumstances, the present inventor developed a novel method for manufacturing sooty bamboo that can industrially produce sooty bamboo as a material for furniture or crafts. 40 within the temperature range of 100-140℃ in contact with incompletely combusted gas
We have already proposed a method of holding it for more than an hour and then slowly cooling it to room temperature over a period of more than 20 hours.

[Problem to be solved by the invention]

The present invention takes advantage of the usefulness of sooty bamboo to further expand its use, and provides a new manufacturing method for economically mass producing sooty bamboo with patterns that can be particularly suited for use in crafts. intended to provide.

[Means to solve the problem]

The method for producing patterned soot bamboo of the present invention, which can achieve the above-mentioned objects, involves positioning gas-impermeable or gas-refractory materials in the form of leaves, stems, etc. on the surface of bamboo material, and then placing the bamboo material on the surface of the bamboo material. 40°C within the temperature range of 100-140°C in contact with incompletely combusted gases of vegetable material
It is characterized by being held for at least an hour and then slowly cooling to room temperature over a period of at least 20 hours.

There are no particular restrictions on the type, shape, size, etc. of the bamboo material used to produce the sooty bamboo in the method of the present invention, and it may be one with branches.

However, from the standpoint of product quality, aged bamboo is preferable to young bamboo, and bamboo that has been dried to some extent is more preferable to bamboo that has just been harvested.

In the method of the present invention, the leaf-shaped, stem-shaped, etc. material placed on the surface of the bamboo material must be gas permeable or gas-resistant.

Here, gas permeability refers to the property of allowing various components contained in incompletely combusted gas to permeate, which will be described later.In the present invention, gas impermeability or low permeability of materials such as leaf-like or stem-like materials is defined as , leaf-like, stem-like, etc. materials may have the property of essentially blocking the permeation of components in the gas, or materials may be able to freely pass through the gas but may adsorb or filter the components in the gas. It may also be one that has the property of preventing permeation.

Furthermore, even if the leaf-shaped, stem-shaped, etc. material itself has gas permeability, it also includes cases where the permeation of components in the gas is delayed due to the thickness of the material.

Note that the term "leaf-shaped, stem-shaped, etc. material" as used herein means a film-shaped or sheet-shaped material, and it is preferable that the material has appropriate flexibility, and there is no particular restriction on its thickness.

The leaf-shaped, stem-shaped, etc. materials used in the present invention include, for example, plant materials such as leaves, flowers, bark of trees and bamboo, or plant materials themselves, animal materials such as leather, and metal foils and plastic sheets. , sheet-like materials such as paper and cloth, and film-forming materials such as paint.

In the present invention, in order to position materials such as leaves and stems on the surface of bamboo material, there are methods such as simply placing them, placing them and then suppressing them with a net or smoke-permeable thin paper, and partially removing them from the outside. A method of adhesion to the surface or the entire surface, a method of adhesion using an adhesive or adhesive, a method of applying a paint containing an adhesive binder and then solidifying it to form a leaf-like, stem-like material, etc. Methods such as using a sheet can be used, but the method is not necessarily limited to these methods.

In the present invention, the plant materials that generate combustion gas for heating bamboo materials include, for example, raw pine needles, cedar leaves, and their twigs, which generate highly concentrated smoke due to incomplete combustion. Preferably, it is a tree or a fresh leaf.

The highly concentrated smoke-containing gas produced by the incomplete combustion of such plant materials comes into contact with the bamboo material, heats it, drives out the moisture in the bamboo material, dries it, and further removes the tar in the smoke. etc. are deposited inside the bamboo material.

The contact between the bamboo material and the smoke-containing combustion gas is preferably carried out, for example, in a semi-closed treatment chamber.
For example, bamboo materials loaded at appropriate intervals on a heat-resistant trolley are transported into a processing chamber lined with heat-resistant materials such as concrete or bricks, and then the plant materials generated from the attached combustion chamber are transported. A combustion gas containing smoke is sent to heat the bamboo material and smoke it.

After the temperature of bamboo material reaches 100℃, it is necessary to hold it for more than 40 hours while regulating the generation of combustion gas so that the temperature is within the temperature range of 100-140℃.

Furthermore, after the contact treatment has been completed for the required time, it is necessary to stop feeding the combustion gas and slowly cool the material over a period of 20 hours or more.

Such treatment can be carried out, for example, in a cycle of two days and nights of smoking and one day and night of cooling, for convenience of operation of the treatment equipment.

Bamboo materials that have been cooled to around room temperature after treatment are taken out of the treatment room, and after removing materials such as leaves and stems, they are washed with water to wash away adhering soot and ash, and further remove moisture. The product is made into a product by performing post-processing such as polishing the surface.

[Effect]

When applying the method of the present invention, for example, when applying smoke to the surface of bamboo by attaching leaves, etc., the smoke components in the smoke are at least partially blocked by the attached leaves. Only the smoke reaches the interior of the bamboo material, and as a result, the surface of the bamboo material, which is colored black-purple by the smoke, appears in light-colored patterns that correspond to the shape of the attached leaves.

Therefore, by adjusting the shape of the material such as leaf-like or stem-like, the partial difference in transmittance to components in smoke, or the difference in the degree of adhesion to the surface of the bamboo material, the shape of the pattern transferred to the surface of the bamboo material can be adjusted. It is possible to change the color and shading, producing soot bamboo with extremely elegant patterns.

〔Effect of the invention〕

According to the method for producing patterned soot bamboo of the present invention, it is possible to obtain black-purple soot bamboo with a light-colored pattern in an arbitrary shape on the surface, but such soot bamboo has been sufficiently dried and hardened, and Since internal distortion has been completely eliminated, it has become possible to further expand the use of the product to other uses such as crafts in addition to the conventional use in architecture and furniture.

Claims (1)

[Claims] 1. A gas-permeable or gas-impermeable leaf-like, stem-like, etc. material is placed on the surface of bamboo material, and then the bamboo material is brought into contact with the incompletely combusted gas of the plant material.
A method for producing patterned soot bamboo characterized by maintaining the temperature within a temperature range of ~140°C for 40 hours or more, and then slowly cooling it to room temperature over 20 hours or more.