JP2006297675A - Manufacturing method of bamboo material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bamboo material bringing about a new hue and glossiness by modifying a conditioned bamboo by a ceramic technique, holding a beautiful appearance and pliability peculiar to a bamboo and becoming a practical material in a building material, decoration, horticulture, etc. <P>SOLUTION: The bamboo material such as a thick-stemmed bamboo or a common Japanese bamboo is cut into a predetermined size and, after the cut bamboo material is dried naturally, it is heated at about 150-350°C for 8-10 h in a kiln before cooled over about 20 h. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a method for producing bamboo material, which is produced by using a bamboo shoot, bamboo or the like as a material, and changing it in a charcoal kiln.

Bamboo has been used for hedges in Japanese houses since ancient times. The disadvantage of this bamboo is that it is green and looks good at first, but the surface gradually turns grayish brown over time, and in a hedge or the like, it gives an old-fashioned impression in less than a year. In addition, frequent replacement is not possible from the viewpoint of cost and labor, and replacement is performed in about six years. It was really uninteresting. For this reason, demand for bamboo has been steadily decreasing.
On the other hand, bamboo charcoal has been conventionally produced by splitting bamboo mulberry, bamboo, etc. into appropriate sizes, or steaming and burning in a bamboo kiln in a charcoal kiln. This bamboo charcoal is originally used as a fuel, but other inventions and devices for use as decoration materials have been proposed.
The device disclosed in Patent Document 1 is a decorative material that uses bamboo charcoal that is divided and carbonized in a direction orthogonal to a node portion.
Utility model registration No. 3080964

  The bamboo charcoal described in Patent Document 1 is baked until the material bamboo is carbonized, and is used in combination with decorative members such as watering and artificial flowers. Further, since the surface is also carbonized, it has been necessary to perform processing such as forming a metal film on any one of the adjacent surfaces with the node as a boundary.

  The bamboo material of the present invention is a solution to the problems of the conventional bamboo charcoal as described above. By fusing the prepared bamboo into a kiln, a new color and luster are created, and the bamboo's unique aesthetic and suppleness are achieved. It can be used as a material for building materials, decoration, horticulture, etc. based on a Japanese image, and can be used as a practical material.

The object of the present invention is the effective use of bamboo resources. This invention pays attention to the field | area which was not utilized as a bamboo material until now, provides the raw material which can contribute industrially, and aims at the expansion of the demand.
Bamboo has flourished nationwide and has been neglected to change the Japanese landscape, and has invaded mountain forests, wilderness, and even fields and residential land. In particular, the abnormal breeding of Sosou bamboo has become a social issue from the viewpoint of the living environment, including the effects on agricultural products such as sunshine.
This is due to the fact that the import of raw materials is greatly affected at the same time as the demand for bamboo is decreasing. Bamboo has historically been deeply integrated into Japanese life and culture, but in recent years, its convenience has expanded into other chemical products due to its convenience.
On the other hand, bamboo charcoal and bamboo vinegar are attracting attention as they play a major role in improving the environment and health, and new demand is expected. Imported products are also prominent in this field.
The bamboo material of this product is expected to expand effective demand as a product that leads to vitalization of the bamboo forestry industry.

  The gist of the present invention is to cut bamboo materials such as Munetake bamboo and true bamboo into predetermined sizes, let them dry naturally, and then heat them in a kiln at a heating temperature of about 150 ° C. to 350 ° C. for 8 hours to 10 hours. This is a method for producing bamboo material which is performed in time and then cooled over about 20 hours.

The effect of the present invention is the effective use of bamboo resources. In other words, by developing a field that has not been used as a bamboo material so far, the effective use of bamboo leads to the activation of the bamboo forestry industry, which is also effective in expanding the demand and accompanying improvements in the living environment in rural areas. Have.
According to the present invention, it is possible to reliably and quickly obtain a bamboo material that is a simple method but is efficient, beautiful, strong, excellent in durability, and suitable for various uses, and that can contribute commercially.

The equipment used in the method for producing bamboo according to the present embodiment can be handled by a charcoal kiln or a bamboo charcoal kiln, etc., but as a prototype kiln, a bake kiln using a simple charcoal manufacturing method of a bamboo charcoal kiln was installed as a model.
The shape of this bake kiln is rectangular and the vertical part has a slightly bow-like roundness, and the dimensions are about 230 cm long x 70 cm wide x 35 cm high.
The scale of the kiln is designed on the premise that several pieces of bamboo (split bamboo) with a length of 1.8m can be put in a kiln, and the structure is refractory brick, refractory block, iron plate And a charcoal kiln system using wall soil.

There are usually four types of bamboo charcoal: black charcoal obtained when the temperature in the kiln is around 500 ° C., black charcoal obtained at around 700 ° C., and white charcoal (activated carbon) obtained at around 1000 ° C.
The steaming temperature of the bamboo material of the present invention is 150 to 350 ° C. Under these conditions, the bamboo material has a large amount of organic matter, inorganic matter, and metals remaining therein, and does not function as bamboo charcoal, and cannot be called bamboo charcoal.

Next, a method for producing bamboo will be described.
Bamboo wood such as Muso bamboo, true bamboo, etc. is cut down, equally divided into round cylinders or vertically divided, made into an appropriate length, naturally dried for 6 months or more, and preparatory work up to just before entering the bamboo charcoal kiln. List the materials. This table is based on the case of Misotake.

Next, the bamboo material prepared as described above is heat-treated in a kiln. In this case, the heating temperature is about 150 ° C. to 350 ° C., and the heating time is from about 6 hours to 7 hours from ignition to closing the kiln (completely closing the kiln from the stack to the chimney), and then cooling is performed for about 20 hours. . This is a case of a small kiln, and the heating time and the like vary depending on the size performance of the kiln or the amount of material.
A list of the above-mentioned bamboo firing in a kiln is shown below.

  During the heating, when the temperature in the kiln is around 150 ° C., the moisture in the bamboo material disappears, and the organic components contained in the bamboo material start to evaporate. Thereafter, when the inside of the kiln reaches around 200 ° C. to 350 ° C., carbonization of the organic matter is started. At this time, a surface film is formed at the time of evaporation of organic matter in the process of thermal decomposition such as hemicellulose and lignin present in the plant body of bamboo. This is fixed by cooling as it is in the kiln.

The bamboo material of this embodiment manufactured as described above is rich in strength and elasticity because the bamboo material remains, and since the surface is steamed in the kiln, an organic film is created. It plays a role in protecting bamboo. Therefore, it has the following characteristics.
1. Since it is made of 孟 mune bamboo and true bamboo and is cut into whole dimensions or vertically and then cut into appropriate dimensions (centered around 1.8 m to 30 cm), products suitable for all uses such as ornaments and figurines can be easily obtained.
In addition, it is possible to change the kiln using a coarsely prepared bamboo material, but the finish will be more beautiful if the material is completely prepared beforehand and baked in the kiln.
2. The color is black, purple-black (dark blue), brown or tan, and gloss. This gloss will be slightly dull when left outdoors for about 5 years, but the surface of the bamboo will not change. Moreover, bamboo does not corrode.
3. As applications, it can be applied to building materials (indoors, furniture, daily necessities, etc.), indoor or outdoor decorations, fences and horticultural materials. Although it is not green, the wine-colored tone gives the bamboo a unique taste and feels healing.
For example, when it is used as a material for a flower bed, it is used instead of bricks, so it is put in soil with a length of about 30 cm. When it is no longer needed, it can be incinerated, so there is no worry about waste disposal.

Bamboo materials having different properties depending on the process of change from the heating to the cooling, that is, the time required from ignition to closing the kiln and the heating temperature can be obtained.
In addition to the charcoal kiln used in the above embodiment, the present invention can also be implemented using a flat furnace, a fluidized furnace, or the like used for an industrial carbonization method.

Claims (1)

  Bamboo materials such as 孟 mune bamboo and true bamboo are cut to a predetermined size and air-dried, then heated in a kiln at a heating temperature of about 150 ° C to 350 ° C for 8 hours to 10 hours, and then about 20 hours. Manufacturing method of bamboo to cool.