JPH02251402A - Manufacture of sooted bamboo with pattern - Google Patents

Abstract

PURPOSE:To manufacture sooted bamboo with pattern as a material useful for construction, furniture or technical art by positioning a material of leaf-shape or stem-shape or the like, gas impermeable or gas hard permeable, on the surface of a bamboo material, bringing the same with incomplete combustion gas of vegetable material, retaining the same within the range of specified temperature for specified period of time and cooling slowly. CONSTITUTION:The manufacture of a sooted bamboo with pattern is carried out by positioning a material of leaf-shape, stem-shape or the like, gas impermeable or gas hard permeable, on the surface of the bamboo material, bringing the bamboo material into contact with incomplete combustion gas of vegetable material, retaining the same in the range of temperature of 100-140 deg.C for 40 hours or more, and then cooling slowly down to the normal temperature during the period of 20 hours or more. The bamboo material cooled down to around the normal temperature after said treatment is taken out of a treatment chamber, and washed after the material of leaf-shaped, stem-shaped or the like is removed to wash away adhered soot, ash or the like, and then the water content is removed and such a process as polishing the surface is carried out to manufacture a product. When the smoking treatment is carried out by placing leaves or the like on the surface of the bamboo material, a smoking component in the smoke is interrupted by the leaves, and a light color pattern corresponding to the shape of the leaves is relieved on the surface of the bamboo material colored dark purple by the smoke.

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 to bind materials 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 made by smoking and 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 is used as a material for furniture and crafts.
Because there are no substitute materials, it is becoming increasingly valuable.

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. 100~ when brought into contact with incompletely combusted gas
Hold within the temperature range of 140℃ for more than 40 hours, then 2
A method has already been proposed in which the material is gradually cooled down to room temperature over 0 hours or more.

[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. 100 ~ in contact with incomplete combustion gas of plant material
Hold within the temperature range of 140℃ for more than 40 hours, then 2
It is characterized by slow cooling to room temperature over 0 hours or more.

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

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.

foliage, which is placed on the surface of the bamboo material in the method of the present invention;
The material of the stalk etc. needs to be gas permeable or hardly gas permeable.

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, the thickness of the material may retard the permeation of components in the gas.

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 the car body itself, animal materials such as leather, metal foil, plastics, etc. The material may be appropriately selected from sheet-like materials such as sheets, 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. A method 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. Fresh leaves etc. are preferable.

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 tar, etc. from the smoke. Deposit inside the bamboo material.

The contact between the bamboo material and the twisting gas containing smoke is preferably carried out, for example, in a semi-closed processing chamber. Bamboo materials loaded at appropriate intervals are brought into the tank, and twisting gas containing smoke from the vegetable material generated from an attached combustion chamber is sent to heat the bamboo materials and smoke them.

After the temperature of the bamboo material reaches 100°C, it is necessary to maintain it for at least 40 hours while controlling the generation of combustion gas so that the temperature is within the range of 100-140°C.

Furthermore, after the contact treatment for the required time is completed, it is necessary to stop feeding the combustion gas and gradually 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 for smoking and one day and night for cooling, for convenience of operation of the treatment equipment.

Bamboo wood that has been cooled to around room temperature after processing is taken out of the processing room, and after removing materials such as leaves and stems, it is 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]

In applying the method of the present invention, on the surface of bamboo material,
For example, when smoking by attaching tree leaves, the smoke components are blocked by the attached leaves and reach the interior of the bamboo only partially, resulting in the bamboo becoming black-purple colored by the smoke. A light-colored pattern appears on the surface that corresponds to the shape of the attached tree leaves.

Therefore, by adjusting the shape of the material such as leaves and stems, the partial difference in the transmittance to the components of the material, 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 shading, and the result is soot bamboo with patterns that are extremely elegant.

〔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 Internal distortion has also been completely eliminated, making it possible to further expand the use of the product to applications such as crafts, in addition to conventional use in architecture and furniture.

Claims (1)

[Claims] Gas impermeable or gas hardly permeable leaves on the surface of bamboo material,
A material such as a stalk is placed, and then the bamboo material is brought into contact with the incomplete combustion gas of the plant material and maintained within a temperature range of 100 to 140°C for 40 hours or more, and then slowly cooled to room temperature over 20 hours or more. A method for producing patterned soot bamboo characterized by: