JPH02192904A - Manufacture of synthetic plate and fuel utilizing bean-curd refuse as raw material - Google Patents

Abstract

PURPOSE:To obtain raw materials inexpensively and easily and make a production process simple, the cost of facilities small, its synthetic sheet rich in moisture absorption and water absorption properties and processing easy further, by making use of an industrial waste of bean-cured refuse by performing physical treatment to the same. CONSTITUTION:Bean-cured refuse discharged after production of bean cured is made into a powdery state by evaporating water through pressurization or decompression of the bean- cured refuse. Starch/chemical are added to the same, which is mixed up with each other until they become pasty state and strength convenient for long term storage and processing is kept. Since this is made into a platelike state through heating and pressurization, a plate where elementary particles are seen apparently and it possesses high density, strength and adhesion is manufactured. Since a chip box or a tray is manufactured by applying paper or a thin sheet of the lumber to the manufactured plate and imparting wooden feeling through a method of press processing or rolling, the same does not vary from a wooden processed goods. Then the same can be used also by molding at a point of the time of the press processing. Protein and a fiber contained within the bean-curd refuse are changed, stuck to each other and become a platelike state. Contents once changed are fixed and does not reduce immediately to the original form even if water is added.

Description

[Detailed Description of the Invention] [Industrial Application Field] By making a composite board from okara, it can be processed into folding boxes and trays made of conventionally used wood, plywood, plastic, etc., which are currently in short supply and expensive. Used as containers such as wooden folding boxes.

[Conventional technology]

Okara is only used as food; most of it is used as feed, and the rest is thrown away as industrial waste, with no other use.

[Problem to be solved by the invention]

Okara is an indigestible polysaccharide that is excreted during the tofu production process, and 50% of it has fiber-retaining properties.

It is a substance with 9.7% carbohydrates, 4.8% protein, and 3.6% fat, but its useful value is that it is only used in small amounts for food and feed, and most of it is discarded, but it spoils quickly (due to pollution). Although it originally had a difficult problem, it changed its character at an early stage and changed to a wood-like substance to prevent decay and prevent pollution.

Currently, the bento industry is flourishing, with many huts set up on roadsides and selling over-the-counter stores, but the boxes and trays used for these are mostly made of plastic, and there are no wooden ones. The reason for this is that wood is difficult to obtain due to a shortage and is expensive, so it cannot be used in large quantities to make cheap lunch boxes, and we have no choice but to use plastic that does not absorb moisture and becomes watery. To provide used folding boxes and trays with a material having properties similar to those of wooden folding boxes with good moisture absorption.

Plastic folding boxes and trays are disposed of as industrial waste after use, but their disposal is extremely difficult and is considered a current social problem. Even if it is incinerated or buried at an industrial waste disposal site, it will return to the soil through natural decomposition.

[Means to solve the problem]

The okara that is discharged after tofu production is pressurized or depressurized to evaporate water and turned into powder. Glue and chemicals are added and mixed until it becomes a paste to give it strength for long-term storage and processing. By pressing it into a plate shape, it is possible to create a plate with high density, strength and adhesive strength with visible grains. It is no different from traditional woodworking as it creates folded boxes, trays, etc. by pasting paper or wood thin plates onto boards made by pressing or rolling to give them the feel of wood. Moreover, it can also be molded and used at the time of press working.

[For production]

When heated and pressurized, the proteins and fibers contained in okara change and adhere to each other, forming a plate-like shape. It cannot be reduced to form. It behaves like another substance that has already been transformed and is similar to wood, has good moisture absorption, adequate heat retention, is easy to process, and is a strong material.

〔Example〕

We are currently making a prototype, and when completely dried okara is placed in a 40-ton manual press and compressed while heating it to 105°C, a board similar to wood can be created. On the outside of this pine thin plate 0.2~0
．． By pasting 3mm thick pieces together, you can create pine boards. This is processed into folded boxes.

〔Effect of the invention〕

Since industrial waste is used, raw materials are easily available and inexpensive. Since the production process is simple, equipment costs are low and large quantities can be produced. The composite board has the same characteristics as wood, is highly absorbent and absorbs water, and is easy to process, making it suitable for mass-produced products.

Furthermore, when disposing of the product after use, it does not cause secondary pollution, whether it is natural decomposition or incineration.

Claims (4)

[Claims] (1) Physically evaporate the moisture from okara, add chemicals, glue, etc. to the proteins and other substances it contains to increase its adhesive strength, and then pressurize and heat it to form it into a plate. (2) Paste paper and wood thin boards on the okara that has become a composite board,
Or, draw a pattern on it as it is to give it its character as a piece of wood. (3) Use this composite board to manufacture boxes and containers that have the same effect as conventionally manufactured wooden boxes. (4) Use okara made in the same way as the composite board as fuel.