Method for manufacturing plastic-substitute goods by using natural materials

Rice husks were washed to a clean state. The rice husks thus washed were dried to a drying degree of 98%.

Meanwhile, 20 wt % of a starch was mixed with 80 wt % of water. This mixture was agitated, so that the starch and water could be uniformly mixed.

After the confirmation of the agitation result, an aging was carried out while slowly heating the mixture up to 100 degrees C. in such a manner that the mixture would not be burned. When the mixture of the starch and water was heated, it became glue.

It was made sure that the glue would not be agglomerated, and thus, the required viscosity of the glue was maintained.

The dried rice husks were mixed with the glue, and then, an agitation was carried out, so that the rice husks would be completely mixed with the glue.

When it was confirmed that the rice husks and the glue were sufficiently mixed together, the mixture was dried to a drying degree of 98%. Here, the proportion of the starch glue was 20 wt %, while that of the rice husks was 80 wt %. After drying the mixture, it was crushed to a size range of 0.01 mm-0.1 mm.

Then 85 wt % of the husk-starch mixture was mixed with 15 wt % of rosin or another natural resin. Then 85 wt % of this mixture (hust-starch-rosin) was mixed again with 15 wt % of water. Then this final mixture was molded by a molding machine at a temperature of 100-350 degrees C. and at a pressure of 5 Kg/Cm2. The product was molded at a frequency of 30-80 seconds.

Rice plant stems were cut to a certain length (3-5 cm). Then the cut stems were cleanly washed. The washed stems were dried to drying degree of 98%.

Meanwhile, 20 wt % of a starch was mixed with 80 wt % of water. This mixture was agitated, so that the starch and water could be uniformly mixed.

After the confirmation of the agitation result, an aging was carried out while slowly heating the mixture up to 100 degrees C. in such a manner that the mixture would not be burned. When the mixture of the starch and water was heated, it became glue.

It was made sure that the glue would not be agglomerated, and thus, the required viscosity of the glue was maintained.

The dried rice plant stems were mixed with the glue, and then, an agitation was carried out, so that the rice plant would be completely mixed with the glue.

When it was confirmed that the rice plant and the glue were sufficiently mixed together, the mixture was dried to a drying degree of 98%. Here, the proportion of the starch glue was 20 wt %, while that of the rice plant was 80 wt %. After drying the mixture, it was crushed to a size range of 0.01 mm-0.1 mm.

Then 85 wt % of the rice plant-starch mixture was mixed with 15 wt % of rosin or another natural resin. Then 85 wt % of this mixture (rice plant-starch-rosin) was mixed again with 15wt % of water. Then this final mixture was molded by a molding machine at a temperature of 100-350 degrees C. and at a pressure of 5 Kg/Cm2. The product was molded at a frequency of 30-80 seconds per product.

Saw dusts were cleanly washed. Then the washed saw dusts were dried to a drying degree of 98%.

Meanwhile, 20 wt % of a starch was mixed with 80 wt % of water. This mixture was agitated, so that the starch and water could be uniformly mixed.

After the confirmation of the agitation result, an aging was carried out while slowly heating the mixture up to 100 degrees C. in such a manner that the mixture would not be burned. When the mixture of the starch and water was heated, it became glue.

It was made sure that the glue would not be agglomerated, and thus, the required viscosity of the glue was maintained.

The dried saw dusts were mixed with the glue, and then, an agitation was carried out, so that the sawdust would be completely mixed with the glue.

When it was confirmed that the sawdust and the glue were sufficiently mixed together, the mixture was dried to a drying degree of 98%. Here, the proportion of the starch glue was 20 wt %, while that of the sawdust was 80 wt %. After drying the mixture, it was crushed to a size range of0.01 mm-0.1 mm.

Then 85 wt % of the saw dust-starch mixture was mixed with 15 wt % of rosin or another natural resin. Then 85 wt % of this mixture (saw dust-starch-rosin) was mixed again with 15wt % of water. Then this final mixture was molded by a molding machine at a temperature of 100-350 degrees C. and at a pressure of 5 Kg/Cm2. The product was molded at a frequency of 30-80 seconds per product.

Corn plant stems were cut into a length range of 3-5 cm. Then the cut corn plant stems were cleanly washed, and then, the washed corn plant stems were dried to a drying degree of 98%.

Meanwhile, 20 wt % of a starch was mixed with 80 wt % of water. This mixture was agitated, so that the starch and water could be uniformly mixed. That is, the agitation was carried out while visually checking the mixing degree.

After the confirmation of the agitation result, an aging was carried out while slowly heating the mixture up to 100 degrees C. in such a manner that the mixture would not be burned. When the mixture of the starch and water was heated, it became glue.

It was made sure that the glue would not be agglomerated, and thus, the required viscosity of the glue was maintained.

The dried corn plant stems were mixed with the glue, and then, an agitation was carried out, so that the corn plant stems would be completely mixed with the glue.

When it was confirmed that the corn plant stems and the glue were sufficiently mixed together, the mixture was dried to a drying degree of 98%. Here, the proportion of the starch glue was 20 wt %, while that of the corn plant stems was 80 wt %. After drying the mixture, it was crushed to a size range of 0.01 mm-0.1 mm.

Then 85 wt % of the corn plant-starch mixture was mixed with 15 wt % of rosin or another natural resin. Then 85 wt % of this mixture (corn plant-starch-rosin) was mixed again with 15 wt % of water. Then this final mixture was molded by a molding machine at a temperature of 100-350 degrees C. and at a pressure of 5 Kg/Cm2. The product was molded at a frequency of 30-80 seconds per product.

Wheat plant stems were cut into a size range of 3-5 cm. Then the cut wheat plant stems were cleanly washed, and the washed wheat plant stems were dried to a drying degree of 98%.

Meanwhile, 20 wt % of a starch was mixed with 80 wt % of water. This mixture was agitated, so that the starch and water could be uniformly mixed. That is, the agitation was carried out while visually checking the mixing degree.

After the confirmation of the agitation result, an aging was carried out while slowly heating the mixture up to 100 degrees C. in such a manner that the mixture would not be burned. When the mixture of the starch and water was heated, it became glue.

It was made sure that the glue would not be agglomerated, and thus, the required viscosity of the glue was maintained.

The dried wheat plant stems were mixed with the glue, and then, an agitation was carried out, so that the wheat plant stems would be completely mixed with the glue.

When it was confirmed that the wheat plant stems and the glue were sufficiently mixed together, the mixture was dried to a drying degree of 98%. Here, the proportion of the starch glue was 20 wt %, while that of the wheat plant stems was 80 wt %. After drying the mixture, it was crushed to a size range of 0.01 mm-0.1 mm.

Then 85 wt % of the wheat plant-starch mixture was mixed with 15 wt % of rosin or another natural resin. Then 85 wt % of this mixture (wheat plant-starch-rosin) was mixed again with 15 wt % of water. Then this final mixture was molded by a molding machine at a temperature of 100-350 degrees C. and at a pressure of 5 Kg/Cm2. The product was molded at a frequency of 30-80 seconds per product.

Bean plant stems were cut into a size range of 3-5 cm. Then the cut bean plant stems were cleanly washed, and the washed bean plant stems were dried to a drying degree of 98%.

Meanwhile, 20 wt % of a starch was mixed with 80 wt % of water. This mixture was agitated, so that the starch and water could be uniformly mixed. That is, the agitation was carried out while visually checking the mixing degree.

After the confirmation of the agitation result, an aging was carried out while slowly heating the mixture up to 100 degrees C. in such a manner that the mixture would not be burned. When the mixture of the starch and water was heated, it became glue.

It was made sure that the glue would not be agglomerated, and thus, the required viscosity of the glue was maintained.

The dried bean plant stems were mixed with the glue, and then, an agitation was carried out, so that the bean plant stems would be completely mixed with the glue.

When it was confirmed that the bean plant stems and the glue were sufficiently mixed together, the mixture was dried to a drying degree of 98%. Here, the proportion of the starch glue was 20 wt %, while that of the bean plant stems was 80 wt %. After drying the mixture, it was crushed to a size range of 0.01 mm-0.1 mm.

Then 85 wt % of the bean plant-starch mixture was mixed with 15 wt % of rosin or another natural resin. Then 85 wt % of this mixture (bean plant-starch-rosin) was mixed again with 15 wt % of water. Then this final mixture was molded by a molding machine at a temperature of 100-350 degrees C. and at a pressure of 5 Kg/Cm2. The product was molded at a frequency of 30-80 seconds per product.

After abstracting the alcoholic spirit out of the barley, there remains sludge of the alcoholic beverages factory. This sludge consists of barley husks and other substances. This sludge may be the reason of pollution. We use these barley husks in the invention to decrease the environment contamination.

The barley husks chosen out of sludge were cleanly washed, and the washed barley husks were dried to a drying degree of 98%.

Meanwhile, 20 wt % of a starch was mixed with 80 wt % of water. This mixture was agitated, so that the starch and water could be uniformly mixed. That is, the agitation was carried out while visually checking the mixing degree.

After the confirmation of the agitation result, an aging was carried out while slowly heating the mixture up to 100 degrees C. in such a manner that the mixture would not be burned. When the mixture of the starch and water was heated, it became glue.

It was made sure that the glue would not be agglomerated, and thus, the required viscosity of the glue was maintained.

The dried barley husks were mixed with the glue, and then, an agitation was carried out, so that the barley husks would be completely mixed with the glue.

When it was confirmed that the barley husks and the glue were sufficiently mixed together, the mixture was dried to a drying degree of 98%. Here, the proportion of the starch glue was 20 wt %, while that of the barley husks was 80 wt %. After drying the mixture, it was crushed to a size range of 0.01 mm-0.1 mm.

Then 85 wt % of the barley husks-starch mixture was mixed with 15 wt % of rosin or another natural resin. Then 85 wt % of this mixture (barley husks-starch-rosin) was mixed again with 15 wt % of water. Then this final mixture was molded by a molding machine at a temperature of 100-350 degrees C. and at a pressure of 5 Kg/Cm2. The product was molded at a frequency of 30-80 seconds per product.

In the above, as to the crushed size of the agricultural byproducts such as rice husks, saw dusts, rice plant stems, corn plant stems, wheat plant stem, bean plant stem, [barley husks] and the like, sizes of less than 0.01 mm or more than 0.1 mm are possible. If the raw material is a plant, any kind will be possible. Further, rice husks, saw dusts, rice plant stems, corn plant stems, wheat plant stem, bean plant stem and the like can be combinedly used depending on the needs or on the use.

According to the present invention as described above, the raw materials are readily available ones, and therefore, the substitution effects will be great. Further, the raw materials are mostly combustible, but owing to the strong pressing during the molding, the product is not easily burned. Even if the product is burned, toxic gases will not be generated, and the flame will be of a low temperature kind. Therefore, in the case of a fire accident, the product will not contribute to the worsening of the catastrophe.