JP2001079816A - Manufacture of container made of biodegradable material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a container made of a biodegradable material made up of a biodegradable material composition. SOLUTION: This biodegradable material composition is slurry made up of pulverized vegetable fibers obtained by grinding a vegetable raw material composed mainly of rice hulls, shellac, titanium oxide, biodegradable wax and calcium carbonate. Then a sheetlike fabric made up of a biodegradable substance and/or a non-woven fabric is impregnated with the slurry and dried into a sheet member 1. Next, one piece of the sheet member 1 or two or more pieces of the sheet member 1 laminated or the sheet members 1 between which a filler 9 is sandwiched, are thermally molded under pressure into a container of a specified shape and thus the container in a biodegradable material is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a container made of a biodegradable material from a plant material such as rice husk and a biodegradable material composition comprising a woven or nonwoven fabric.

[0002]

2. Description of the Related Art Conventionally, food products using biodegradable nonwoven fabrics have been used.
Food trays and cases to be transported or displayed in showcases
The disposable container as described in, for example, JP-A-4-1897
One disclosed in Japanese Patent No. 40 is known. For the food
Trays are made of cellulosic natural fibers or cellulosic
Made of recycled or semi-synthetic fibers or a blend of these
Fiber web is chitosan salt-based interfiber binder
And a water repellent is solidified to 100 parts by weight of the fiber.
200 g / m per unit weight of 1 to 10 parts by weight per minute ^Twothat's all
Made of biodegradable non-woven fabric with an apparent density of 0.2 g / cm
^ThreeIt is formed in the shape of a saucer that has been compression molded as described above.
You.

[0003] The biodegradable molding material disclosed in Japanese Patent Application Laid-Open No. 10-323810 comprises 51 to 70 wt% of paper powder and 30 to 49 wt% of a biodegradable aliphatic polyester resin, and has a heat resistant temperature. Vegetable pots that can be transplanted into the soil can be formed for each pot, such as disposable dishes, trays, and seedlings, which are expensive and can be sterilized with steam. The biodegradable molding material has water resistance and, when discarded after use, collapses and disappears within a certain period of time.

[0004] Japanese Patent Application Laid-Open No. 7-205120 discloses a method for producing a degradable container. The method for producing the degradable container is to use cereal straw and rice husk as a basic raw material so as not to cause environmental pollution due to disposal. The cereal straw and rice husk are sterilized by high-temperature sterilization, and after drying, cut fibers or crushed in advance. In the meantime, the hydrated starch is heated to gelatinize, and the mixed material obtained by mixing and stirring the both is heated and pressed by a die, and then a plastic film is applied to form a cover layer.

[0005]

However, conventional disposable containers contain a small amount of materials that cannot be biodegraded in order to improve the flowability during molding. Will cause. Further, the conventional degradable container has a drawback in that it does not have sufficient mechanical properties such as rigidity, strength, shape retention and the like when used. Further, the molded article produced by the method for producing a decomposable container can maintain its shape only by providing a cover layer. In addition, conventional disposable containers do not have sufficient strength of the product. For example, when used as a food container, the shape of the container itself cannot be maintained when a liquid or vinegar is put into the food container and transferred. In addition, problems such as the fact that the surface itself discolors due to absorption of moisture by the container itself occurred. When molding using a biodegradable material including a sheet material to increase the strength of the container, apply a non-sheet material on the sheet material, or apply a sheet on the surface of the non-sheet intermediate molded body. However, since the sheet material and the non-sheet material are not integrally formed, such as when the sheet material is arranged and formed, there are problems in terms of weight reduction and thickness reduction, and problems such as poor productivity have occurred.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, and to provide a plant fiber powder material mainly composed of rice husks, a binder, a bleach sterilizer, water resistance, heat resistance, and the like. A slurry is made from the material, and the slurry is impregnated into a woven and / or nonwoven sheet made of a biodegradable substance and then dried to produce a sheet material, or the slurry itself is produced into a sheet material. When the strength is to be increased, at least two or more sheets are laminated and heated and pressed into a predetermined shape to produce a container. When the composition constituting the container is discarded without burning, the container material is used. Is decomposed in a short period of time by the help of microbial decomposition and sunlight, ultraviolet rays, etc., whereby it is decomposed into harmless soil, H ₂ O, CO _2, etc. Lighter and thinner Improves the productivity, and to provide rigidity during use, the strength, shape retention, water resistance, a method for producing a biodegradable material made container has excellent properties such as heat resistance.

[0007] The present invention relates to a sheet-like woven fabric made of a biodegradable substance, comprising a plant fiber powder material mainly composed of rice hulls, shellac powder and / or a slurry containing at least a shellac solution and a biodegradable wax. Alternatively, the present invention relates to a method for producing a biodegradable material container, comprising forming a sheet member by impregnating a nonwoven fabric by applying or dipping and drying the sheet member, and then heating and pressing the sheet member into a container having a predetermined shape. .

Further, titanium oxide and calcium carbonate can be added to the slurry. For example, when the container is used as tableware or the like, it is effective to add titanium oxide as a deodorant or a bactericide in order to eliminate the odor of rice hulls or to sterilize it. In addition, the shellac powder and / or shellac solution functions at least as a binder and a water-resistant material, the titanium oxide functions as at least a deodorant and a bleaching fungicide, and the biodegradable wax includes at least a water-resistant material, Functions as a mold material and a water generating material.

[0009] The sheet member to be formed by heating and pressing includes:
It is composed of a single sheet or a plurality of stacked sheets. In the step of laminating the sheet members, a filler containing a biodegradable material such as the vegetable fiber powder material, the sheet-like woven fabric and / or the non-woven fabric is appropriately interposed between the sheet members to form a container. The heat shielding property, heat resistance, thickness and strength can be adjusted. For example, if the filler is formed as a porous body, an air layer is formed in the porous portion, and the heat shielding property can be greatly improved.

[0010] The surface of the container formed by heating and pressing the sheet member is provided with the biodegradable wax and the silicone resin.
Coating agent is applied. The biodegradable wax generally does not have heat resistance to high temperatures, but is preferably coated on the surface of the container to improve water resistance in the field of use of the container.

[0011] The plant fiber powder material is composed of pulverized powder pulverized to 50 to 350 mesh. Further, the heating and pressing molding conditions of the sheet member are as follows.
The temperature ranges from 0 ° C., the pressure ranges from 30 to 200 kg / cm ² and the molding time ranges from 3 to 60 seconds.

[0012] The slurry contains the plant fiber powder material 40 to 9
0%, the shellac solution 5 to 40%, the titanium oxide 1 to 30%, the biodegradable wax 1 to 40%, the calcium carbonate 1 to 20%, and the remaining water or organic solvent. I have.

A material selected from plant materials such as bamboo, sugar cane, straw, coconut, bacas, wood chips, kenaf, cotton lint, pulp and a mixture of two or more of these is added to the rice husk. I have. Further, the biodegradable wax is added with a material selected from natural waxes such as animal and vegetable waxes, mineral waxes, petroleum waxes, and mixtures of two or more of these.

The slurry is selected from co-pal, rosin, distilled tall oil, tall oil fatty acid, terpene polymer, starch, gelatin, casein, dammer, arabia gum, gilsonite, and a mixture of two or more of these. Binder has been added. In addition, a zeolite and / or an activated carbon deodorant disinfectant is added to the slurry.
Further, an inorganic filler such as talc and / or mica is added to the slurry.

The step of impregnating the sheet member with the slurry is achieved by passing the sheet member unreeled from the bobbin in a state immersed in the slurry housed in a tank.

[0016] Alternatively, the present invention provides a method for manufacturing a sheet member by drying a plant fiber powder material mainly composed of rice hulls, shellac powder and / or a slurry containing at least a shellac solution and a biodegradable wax. The present invention relates to a method for producing a container made of a biodegradable material, which comprises heating and pressing the sheet member into a container having a predetermined shape. Further, in the step of laminating the sheet members, a filler of a biodegradable material containing at least the plant fiber powder material is appropriately interposed between the sheet members, and the heat shielding property, heat resistance, thickness and Adjust the intensity.

In the method for producing a container made of a biodegradable material,
The step of manufacturing the sheet member from the slurry includes immersing a sieve in the slurry contained in a tank, the slurry being spread on the sieve, lifting the sieve from the tank, and drying the slurry. Is achieved by

[0018] The step of impregnating the sheet member with the slurry is achieved by passing the sheet member unreeled from the bobbin in a state of being immersed in the slurry accommodated in a tank.

Since the method for producing a container made of this biodegradable material is constituted as described above, shellac (shellac powder and / or shellac solution) has water resistance and heat resistance, Because wax has water resistance,
When used as a food container, the container does not absorb water and does not swell, discolor or deteriorate, and a preferable container can be provided. In addition, by laminating at least two or more sheet members impregnated with a slurry made of a biodegradable material, shape retention and strength of the container can be secured, and a preferable container can be manufactured. In addition, the method of manufacturing the container made of the biodegradable material includes a bleaching disinfectant and a titanium oxide having a deodorizing effect, and a biodegradable wax for improving releasability, water release, fluidity and gloss as the biodegradable material. Because of the addition, the characteristics of the container can be improved. Furthermore, containers manufactured by this method of manufacturing containers made of biodegradable materials are convenient for handling,
The effect of improving productivity is also obtained. Further, in the method of manufacturing a container made of a biodegradable material, since a biodegradable material can be sandwiched between sheet materials to be laminated, the thickness of the container can be increased by sandwiching another biodegradable material. It is also possible to add other functions to the container, depending on the nature of the material being sandwiched.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a method for manufacturing a container made of a biodegradable material according to the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of a method for manufacturing a container made of a biodegradable material according to the present invention, and FIG. 2 is a schematic diagram showing an embodiment of a manufacturing apparatus for achieving the method for manufacturing a container made of a biodegradable material according to the present invention. FIG. 3 is a schematic explanatory view showing an embodiment of a heating and pressurizing apparatus in a manufacturing apparatus for achieving the method for manufacturing a biodegradable material container according to the present invention, and FIG. 4 is a biodegradable material container according to the present invention. FIG. 7 is a schematic explanatory view showing an example of a manufacturing process using different materials in the manufacturing method of FIG.

[0021] The method for producing the biodegradable material composition comprises, at least, crushing rice hulls, plant fiber powder material, binder,
A shellac powder and / or shellac solution as a water-resistant material and a heat-resistant material, and a biodegradable wax for improving water resistance are prepared (steps 1 to 3). A slurry (slurry) 4 is prepared (step 6). In this case, the slurry 4 can be added with titanium oxide as a deodorant and a bleaching bactericide, and calcium carbonate (steps 4 and 5) as a bulking agent.
On the other hand, a sheet-like woven fabric made of a biodegradable substance and / or a sheet material made of a non-woven fabric are prepared (step 7). The sheet material is applied to the slurry 4 by dipping or spraying (step 8), and a sheet member 1 in which the sheet material is impregnated with the slurry 4 of the biodegradable material is manufactured (step 9). Next, the sheet member 1 is dried (step 10) and dried to laminate one or two or more sheet members 1 (step 11).
Next, the laminated sheet member 1 is heated and pressed into a predetermined shape (step 12), and a predetermined biodegradable material container 8 is manufactured (step 13).

In the step of laminating the sheet members 1,
As shown by C in FIG. 4, the heat shielding property, heat resistance, thickness and strength of the container 8 can be adjusted by appropriately interposing the filler 9 between the sheet members 1. The filler 9 is made of a biodegradable material such as a plant fiber powder material, a sheet-like woven fabric and / or a nonwoven fabric, or a mineral raw material such as calcium carbonate, calcium hydroxide, calcium oxide, titanium oxide, and mica powder. Can be.

In this method for manufacturing a container made of a biodegradable material, the conditions for heating and pressing the sheet member 1 are as follows.
２５０250 ° C., pressure 30３０200 kg / cm ² and molding time 3３60 seconds.

In the slurry 4 composed of a mixed material, the mixing ratio of these raw materials is as follows: plant fiber powder material 40 to 90%, shellac solution binder 5 to 40%, titanium oxide deodorant / bleaching fungicide 1 to 30% , 1 to 40% of biodegradable wax, 1 to 20% of calcium carbonate and the balance of water.

The plant fiber powder material is composed of ground powder ground to 50-350 mesh. In addition, rice husks include bamboo, sugarcane, straw, palm, bacas, wood chips, cotton lint, kenaf (an annual plant of the genus Hibiscus),
It is also possible to add a material selected from plant materials such as pulp and a mixture of two or more of these. These plant materials are preferably crushed into powders.
Depending on the intended use, a crushing degree of a coarse state may be sufficient.

Shellac may be selected from copal, rosin, distilled tall oil, tall oil fatty acid, terpene polymer, starch, gelatin, casein, dammer, arabic gum, gilsonite, and a mixture of two or more of these as a binder. The added material can be added. The sheet-like woven and / or non-woven fabric constituting the sheet material is, for example,
It is made of cotton, cotton, hemp, jute, biodegradable resin, silk, natural material, or the like, in which fibers are entangled with each other by a water jet, or carbon fiber, glass fiber, or the like. In addition, zeolite, activated carbon and the like are added as a deodorant and a bleaching disinfectant. The biodegradable wax for improving the water resistance is added with a material selected from natural waxes such as animal and plant waxes, mineral waxes, petroleum waxes, and mixtures of two or more of these waxes. The biodegradable wax is generally vulnerable to heat and may be dissolved when it comes into contact with, for example, a material having a temperature of 100 ° C. or more.
It is necessary to consider the use of the container 8. When a biodegradable wax is applied to the surface of the container 8, silicone
Preferably, a coating agent is used. Further, an inorganic filler such as talc and / or mica is added to the slurry 4.

As shown in FIG. 2, the step of impregnating the sheet member 1 with the slurry 4 produced as described above includes, as shown in FIG. This is achieved by immersing it in the slurry 4 stored in the container. The sheet member 1 immersed in the slurry 4 in the tank 3 is sent out by the feed roller 6 and sent to the dryer 5 having the heater 17.
In addition, a scraper 10 or the like can be provided near the front of the feed roller 6 or the like to adjust the thickness of the sheet member 1. By passing the sheet member 1 through the dryer 5, the slurry 4 impregnated in the sheet member 1 can be dried and solidified. The sheet member 1 impregnated with the slurry 4 may be advanced in the dryer 3 so as to be dried at, for example, about 100 ° C. for 1 to 2 hours. As shown in FIG. 3, the dried sheet member 1 is heated by a heat forming press 7 including an upper die 11 and a lower die 12 having a heater 14 and controlled by a controller 16 to control the temperature of the heater 14 and the pressing device 15. The pressing force is, for example, 100 to 250 ° C.,
It is controlled under the conditions of 30 to ²⁰⁰ kg / cm ² and 3 to 60 seconds, and can be formed by repeating the pressing once to three times. Then, the edge of the container 8 of the molded body is trimmed, and the container 8 is removed. Complete. At this time, the remaining sheet member 1 formed and removed from the container 8 may be discarded or wound around a bobbin for disposal.

In this method of manufacturing a container made of a biodegradable material, when the container 8 is manufactured, the sheet member 1 is heated and pressed without laminating the sheet member 1 as shown in FIG. Thus, the container 8 can be manufactured. Alternatively, in the method of manufacturing a container made of a biodegradable material, at least two or more sheet members 1 (2 in FIG. 4) are used as shown in FIG. Then, the laminated sheet member 1 is heated and pressed into a container 8 having a predetermined shape. The number of stacked sheets can be changed depending on the type of the container 8 to be manufactured. For example, five sheets can be stacked. Alternatively, in the case of manufacturing a container 8 requiring heat resistance, heat shielding and the like in the method for manufacturing a container made of a biodegradable material, as shown in FIG. It is also possible to arrange between the sheet members 1 and heat-press and mold the stacked sheet members 1 and the filler 9 at the same time. Further, if the filler 9 is made of a porous material such as a fiber material, the air existing in the porous portion forms a heat shielding layer, and the heat shielding property can be greatly improved. For example, when a hot liquid or the like is put in the container 8, the outside of the container 8 is not very hot and is easy to handle.

The container 8 can be used, for example, as a tableware, a container, a packaging box, a can, a bag, and the like, as well as a container for plant cultivation such as a flowerpot or a vegetation pot. In addition, the material constituting the container 8 is decomposed by microorganisms or disintegrated by sunlight, ultraviolet rays, etc., and is harmless soil, H ₂ O, CO ₂
It is converted to or returned to nature as a mineral.

Next, another embodiment of the method of manufacturing a container made of a biodegradable material according to the present invention will be described with reference to FIG.
FIG. 5 is a block diagram for explaining another embodiment of the method for manufacturing a container made of a biodegradable material according to the present invention.

This embodiment is a manufacturing method in which the slurry itself is formed into a sheet by a method similar to paper making, and the sheet member 20 is formed without using a sheet-like woven fabric and / or non-woven fabric. That is, the method for producing the container made of the biodegradable material mainly comprises drying the slurry 4 containing at least the plant fiber powder material mainly composed of rice hulls, shellac powder and / or shellac solution and biodegradable wax. Then, the sheet member 20 is formed, and then the sheet member 20 is heated and pressed into a container having a predetermined shape. In the manufacturing process of this biodegradable material container, for example, as shown in FIG. 5, the slurry 4 is put into the tank 3 (step H), and the small sieve 21 is immersed in the tank 3 containing the slurry 4. Then, a part of the slurry 4 is moved to a diffusion state on the sieve 21 by shaking the sieve 21 (step J). The sieve 21 is lifted and the slurry 4 is deposited on the sieve 21 in the form of a sheet to produce the sheet material 20 (step K). The water is filtered from the sheet material 20 attached to the sieve 21 and solidified (step L),
The sheet material 20 is separated from the sieve 21 by inverting the sieve 21. The sheet member 20 is dried to produce the sheet member 1. The sheet member 1 is formed in the same manner as in the method shown in FIG.
It is formed into a container 8.

In this embodiment, as shown in FIG. 4C, the container 8 can be produced by laminating the sheet members 1 obtained by drying the sheet material 20. In the laminating step, the filler 9 of the biodegradable material containing at least the plant fiber powder material is used.
Can be appropriately interposed between the sheet members 1 to adjust the heat shielding property, heat resistance, thickness and strength of the container 8.

[0033]

The method for manufacturing a container made of a biodegradable material according to the present invention is constituted as described above, and in particular, a sheet member obtained by impregnating a sheet material with a slurry made of a biodegradable material, Since the container itself is manufactured by forming itself into a sheet member by heating and pressing the sheet member to form a container, the strength can be improved as compared with a conventional product. In addition, the container formed by heating and pressing can achieve a reduction in weight and thickness, and in the manufacture of the container, the effect of improving productivity can be obtained from the convenience of handling. Further, since it is possible to manufacture a container by laminating one or two or more sheet members, the number of sheets to be laminated is adjusted according to the use of the container to adjust the strength or degree of water resistance of the container. It is possible to Furthermore, it is also possible to sandwich a biodegradable material between the sheets to be laminated, so that the container can be made thicker by sandwiching, or the container can have other functions depending on the properties of the material to be sandwiched, such as heat shielding, heat resistance, etc. It can have sex.

The container manufactured as described above is
It can be used as tableware, tableware trays, vegetation pots, containers to hold various materials, etc. Even after being used as a food container, even if the container itself is left or discarded as non-burnable garbage, the materials that make up the container It can be biodegraded by microorganisms or converted into harmless soil, water or carbon dioxide gas that can be returned to soil after being destroyed by sunlight, especially ultraviolet rays, so that there is no need to incinerate or recycle containers and treat them. Can be omitted, and the biodegraded soil can be used as a soil conditioner for agricultural products. Further, the container manufactured by this manufacturing method has the above-described function while the container itself is at the same price as the market price, so that an extremely inexpensive container can be provided as a whole.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a container manufacturing process in a method for manufacturing a container made of a biodegradable material according to the present invention.

FIG. 2 is a schematic explanatory view showing an embodiment of a manufacturing apparatus for achieving a method for manufacturing a container made of a biodegradable material according to the present invention.

FIG. 3 is a schematic explanatory view showing an embodiment of a heating and pressurizing device in a manufacturing apparatus for achieving the method of manufacturing a container made of a biodegradable material according to the present invention.

FIG. 4 is a schematic explanatory view showing an embodiment of a manufacturing process using different materials in the method for manufacturing a container made of a biodegradable material according to the present invention.

FIG. 5 is an explanatory diagram showing a manufacturing process of another embodiment of the method for manufacturing a biodegradable material container according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 sheet member 2 bobbin 3 tank 4 slurry 5 dryer 6 feed roller 7 heat forming press 8 container 9 filler 10 scraper 11 upper mold 12 lower mold 14, 17 heater 15 pressure device 16 controller 20 sheet material 21 sieve

Continued on the front page (72) Inventor Hideaki Suemas 3-3-1 Higashi-Eki, Koga-shi, Fukuoka Prefecture Inside Seibu Electric Machinery Co., Ltd. (72) Inventor Yoji Kai 3-3-1, Higashi-Eki, Koga-shi, Fukuoka Seibu Electric (72) Inventor Norio Matsuo 3-3-1, Higashieki, Koga-shi, Fukuoka Prefecture Inside Seibu Electric Machinery Co., Ltd. (72) Inventor Tatsuya Hamachi 598 Kuroda, Katsuyama-cho, Kyoto-gun, Fukuoka Prefecture 4 Fukuoka Chemical Industry Co., Ltd. In-house F term (reference) 2B260 AA02 AA03 AA20 BA07 BA08 BA18 BA19 BA26 BA30 CC02 CD30 DB01 DB02 DB13 DB21 DB30 DC05 DC20 DD02 EA05 EB01 EB02 EB05 EB06 EB11 EB12 EB19 EB21 EC18 3E033 AA08 BA30 BB04 A09 A08 AA07 AA08 AG02 AG05 AG11 AG12 AG19 AG26 AG28 AG43 AG47 AG50 AG51 AG52 AG54 AH10 AH23 AH37 AH38 AH50 AJ01 BE08 BE09 BE10 BE11 BE14 BE20 EA16 EA20 EA32 FA16 FA19 FA20 FA30 GA50

Claims (18)

[Claims] 1. A sheet-like woven and / or non-woven fabric made of a biodegradable substance comprising a vegetable fiber powder material mainly composed of rice hulls, shellac powder and / or a shellac solution and a slurry containing at least a biodegradable wax. After being impregnated by coating or dipping on the sheet, it is dried to produce a sheet member,
Next, a method for producing a container made of a biodegradable material, comprising heating and pressing the sheet member into a container having a predetermined shape. 2. The method for producing a container made of a biodegradable material according to claim 1, wherein said slurry contains an inorganic filler such as titanium oxide and calcium carbonate. 3. The shellac powder and / or shellac solution functions at least as a binder and a water-resistant material, the titanium oxide functions at least as a deodorant and a bleaching fungicide, and the biodegradable wax has at least a water-resistant property. 3. The method for producing a container made of a biodegradable material according to claim 2, wherein the container functions as a material, a release material, and a water generating material. 4. The sheet member formed by heating and pressurizing,
The method for producing a container made of a biodegradable material according to any one of claims 1 to 3, comprising a single sheet or a plurality of stacked sheets. 5. In the step of laminating the sheet members, a filler containing a biodegradable material such as the plant fiber powder material, the sheet-like woven fabric and / or the nonwoven fabric is appropriately interposed between the sheet members. 5. The method for producing a container made of a biodegradable material according to claim 4, comprising adjusting the heat shielding property, heat resistance, thickness and strength of the container. 6. The biodegradation according to claim 1, wherein the biodegradable wax and the silicone coating agent are applied to a surface of the container formed by heating and pressing the sheet member. Method for manufacturing container made of conductive material. 7. The production of a container made of a biodegradable material according to claim 1, wherein the plant fiber powder material is constituted by crushed powder crushed to 50 to 350 mesh. Method. 8. The heating and pressing molding conditions of the sheet member are as follows:
Temperature is 100-250 ° C, pressure is 30-200kg / c
method for producing a biodegradable material made container according to any one of claims 1 to 7, consisting in m ^2, and the molding time is in the range of 3 to 60 seconds. 9. The method as claimed in claim 9, wherein the slurry comprises the plant fiber powder material 40 to
90%, the shellac solution 5 to 40%, the titanium oxide 1 to 30%, the biodegradable wax 1 to 40%, the calcium carbonate 1 to 20%, and the remaining water or organic solvent. The method for producing a biodegradable material container according to any one of claims 2 to 8, comprising: 10. The rice hulls include bamboo, sugarcane, straw,
10. A material selected from plant materials such as palms, bacas, wood chips, kenaf, cotton lint, and pulp, and a material selected from a mixture of two or more thereof. 3. The method for producing a container made of a biodegradable material according to item 1. 11. The slurry comprises co-pal, rosin, distilled tall oil, tall oil fatty acid, terpene polymer, starch,
The binder according to claim 1, further comprising a binder selected from gelatin, casein, dammer, arabic gum, gilsonite, and a mixture of two or more thereof.
0. The method for producing a container made of a biodegradable material according to any one of 0. 12. The method for producing a container made of a biodegradable material according to claim 1, wherein the slurry is added with a zeolite and / or an activated carbon deodorant disinfectant. . 13. The biodegradable wax comprises a material selected from natural waxes such as animal and vegetable waxes, mineral waxes, petroleum waxes, and mixtures of two or more of these. 13. The method for producing a container made of a biodegradable material according to any one of 12 above. 14. The method for producing a container made of a biodegradable material according to claim 1, wherein the slurry contains an inorganic filler such as talc and / or mica. . 15. The step of impregnating the sheet member with the slurry is achieved by passing the sheet member unreeled from a bobbin in a state of being immersed in the slurry housed in a tank. 15. The method for producing a container made of a biodegradable material according to any one of 1 to 14. 16. A plant fiber powder material mainly composed of rice husks,
The slurry comprising at least shellac powder and / or shellac solution and a biodegradable wax is dried to form a sheet member, and then the sheet member is heated and pressed into a container having a predetermined shape. A method for producing a container made of a degradable material. 17. In the step of laminating the sheet members,
17. The method according to claim 16, wherein a filler of a biodegradable material containing at least the plant fiber powder material is appropriately interposed between the sheet members to adjust the heat shielding property, heat resistance, thickness and strength of the container. A method for producing a container made of the biodegradable material according to the above. 18. The step of manufacturing the sheet member from the slurry includes immersing a sieve in the slurry contained in a tank, the slurry diffuses on the sieve, and the sieve is pulled up from the tank. The method for producing a container made of a biodegradable material according to claim 16 or 17, which is achieved by drying the slurry.