JP3263435B2 - Biodegradable foam molded container and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foamed container made of cereals, starch, vegetable protein, fiber and the like, and a method for producing the same.

[0002]

2. Description of the Related Art As a container having biodegradability obtained by mixing a raw material consisting of flour and / or starch and water to form a slurry, followed by baking, a corn cup, a middle container and the like are known. I have.

[0003]

However, the above-mentioned container has a fragile structure and is apt to be cracked, so that it has insufficient strength, and furthermore, it is inferior in water resistance, so that it cannot be used for foods with a large amount of water. Has problems.

[0004] An object of the present invention is to provide a biodegradable foam-molded container made of granules or powders such as grains and starch, having sufficient strength during use and storage, and having excellent heat insulation and water resistance. And a method for producing the same.

[0005]

SUMMARY OF THE INVENTION A method for producing a biodegradable foam-molded container according to the present invention is a method for producing a grain, starch, vegetable protein, or fibrous powder, a granulated product from the powder, and after at least one material selected from the group consisting of cereal grain, and heat and pressure in a sealed mold, vacuum and is bound, after forming the container shape, further, molded epithet
Vessel again placed in a mold, and is characterized in that pressure.

[0006] The biodegradable foam molded container of the present invention is a molded container obtained by the above-mentioned production method.

[0007] Examples of the above-mentioned cereals include white rice, brown rice, wheat, barley, foam, corn, and beans. Examples of the vegetable protein include wheat extracted protein and the like, and examples of the fibrous material include cellulose and the like.

[0008] In the above manufacturing method , the mold is heated and heated.
The pressure in the mold by pressure increases. Then, the pressure is reduced after maintaining the pressure for a certain time. As a result, the raw material in the mold foams and binds in the form of granules or powder, and a container-like molded product is obtained.

Further, by pressing the molded article once foamed again in the mold, a foamed molded article having higher density and increased strength and excellent appearance can be obtained.

Further, by changing the shape of the molding die arbitrarily, a molded container having an arbitrary shape such as a dish shape, a bowl shape, and a cup shape can be obtained.

By controlling the water content of the above-mentioned molded container to about 3 to 30%, preferably 3 to 20%, the strength of the container against impact can be increased. 3 moisture content
%, The resulting molded container becomes brittle, while
If it exceeds 30%, it becomes soft and cannot maintain its shape.

The method of controlling the water content includes controlling the water content of the raw material, controlling the molding conditions,
Control of the moisture content after molding is mentioned.

As a control method based on molding conditions,
Heating conditions such as the rate of temperature rise, pressure, holding time, manner of pressure reduction, that is, control of the rate of pressure reduction, and method of opening the mold are exemplified.

As an example of a method of controlling the moisture content after molding, the molded article is left in a fixed humidity chamber for a fixed time. Alternatively, water may be sprayed on a molding container.

[0015] In addition to the above-mentioned raw materials, at least one of sugars, fats and oils, emulsifiers, stabilizers, salts, water, and protein powder.
One may be added. By these additions, the binding property is improved, and a molded container having a good surface condition can be obtained.

Examples of the emulsifier include monoglycerides and derivatives thereof, sugar esters, propylene glycol esters, polyglycerin fatty acid esters, and sorbitan fatty acid esters.

Examples of the stabilizer include vegetable polysaccharides such as locust bean gum, seaweed extracts such as carrageenan, and thickeners of microbial origin.

Examples of the above salts include phosphates.

Incidentally, a coloring agent, a fragrance and the like may be added to the above-mentioned raw materials as necessary.

The foam-molded container of the present invention is a food container such as skewers, frankfurt, chicken nuggets, takoyaki, yakisoba, okonomiyaki, curry, hamburger, hot dog, soup, roto-yaki, pigman, ramen, pizza, hot cake, french fries, etc. It can be widely used as general containers.

This container is decomposed by microorganisms and decomposed in about 2 to 10 weeks when buried in soil.

[0022]

As described above, the biodegradable foam-molded container of the present invention comprises a grain, a starch, a vegetable protein, and a fibrous powder, a granulated product from the powder, and a grain. the raw material consisting of at least one selected from, placed in a sealed container type, and heat and reduced pressure after the pressure is bound, after forming the container shape, further, again placed in a mold a molding container, pressurized
It is obtained by pressure.

Therefore, the container has sufficient strength at the time of use and storage, and has excellent heat insulation and water resistance. In addition to a general food container, for example, a container for a food having a high temperature or a food having a high moisture content is provided. This has the effect of being usable as

The method for producing a biodegradable foam-molded container according to the present invention comprises, as described above, a grain, a starch, a vegetable protein, and a fibrous powder, a granulated product from the powder,
And a raw material consisting of at least one selected from cereal grains, placed in a sealed mold, heating and reduce the pressure to bound after pressing, after forming the container shape, further, re the molding container
Placed in a fine mold, a method of pressurization.

Therefore, the molding container is put back into the molding die and added.
Pressing and decompressing and binding , more dense, strength and appearance
It becomes improved foamed container, also an effect that it is possible to impart thermal insulating properties, water resistance to the container. Change
Further, by controlling the moisture content of the molded container to 3 to 30%, the strength of the container can be further increased.

Further, by adding at least one of sugars, oils and fats, emulsifiers, stabilizers, salts, water and proteins to the raw materials, the binding properties can be improved and the surface condition of the molded container can be further improved. .

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-148638 (JP, A) JP-A-2-298525 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B65D 85/50 B65D 85/72

Claims (6)

(57) [Claims] A raw material comprising at least one selected from cereal, starch, vegetable protein, and fibrous powder, granulated from said powder, and cereal grains is placed in a closed mold. , heating and reduce the pressure to bound after pressing, after forming the container shape, further, entering again the mold a molding container
Is, the manufacturing method of the biodegradable expanded molded container, characterized in that the pressurization. 2. The water content of the molded container after molding is 3 to 30.
%. The method for producing a biodegradable foam molded container according to claim 1, wherein 3. The method according to claim 1, wherein the raw material contains at least one selected from the group consisting of sugars, fats and oils, emulsifiers, stabilizers, salts, water, and proteins.
Or the method for producing a biodegradable foam molded container according to 2 . 4. A raw material comprising at least one selected from cereal, starch, vegetable protein, and fibrous powder, granulated from said powder, and cereal grains is placed in a closed mold. , heated and vacuum after the pressure is bound, after forming the container shape, further, again placed in a mold a molding container,
A biodegradable foam-molded container characterized by comprising a pressurized one. 5. The water content of the molded container after molding is 3 to 30.
%. The biodegradable foam-molded container according to claim 4, wherein Wherein said raw material, sugars, fats, emulsifiers, stabilizers, claim 4, characterized in that it comprises the salts, water, and at least one selected from the group consisting of proteins
Or the biodegradable foam-molded container according to 5.