KR100334952B1 - A method for preparing disposable dishes degrading naturally and a manufacturing apparatus thereof - Google Patents

Abstract

The present invention relates to a method for manufacturing a disposable container that is naturally decomposed, and a device for manufacturing the same, comprising: stirring the 3.4% by weight of malt sugar and 25.2% by weight of water, and fumigation at a temperature of 90 to 130 ° C .; Stirring by weight%, and adding 54.6% by weight of rice straw powder to the stirred mixture, stirring again, compression molding the mixture of maltose, rice flour, rice straw powder to form a molding, drying the molding And a method of manufacturing a disposable container comprising a step of applying bran wax to the dried molding and drying, and sterilizing the molded article coated with bran wax, and an upper mold and a space for accommodating the upper mold. On the lower surface of the space part, a lower mold having a hole formed therein, and an upper portion of which is plate-shaped, and air through which air can pass through under the upper plate. There is provided a manufacturing apparatus of a disposable container having a push rod formed in the inlet, the inner mold is installed in the space portion of the lower mold and can move up and down. Disposable container manufactured by the present invention is not only to prevent environmental pollution, but also to improve the yield in the manufacturing process and reduce the raw materials.

Description

Method for manufacturing disposable biodegradable container and apparatus therefor {A METHOD FOR PREPARING DISPOSABLE DISHES DEGRADING NATURALLY AND A MANUFACTURING APPARATUS THEREOF}

The present invention relates to a method for manufacturing an environmentally friendly disposable container and a manufacturing apparatus thereof, and more particularly, to a manufacturing method and a manufacturing apparatus for a disposable container that is completely natural decomposition.

Recently, according to the development of outdoor drinking culture, there is a disposable product that is used hygienically to hold food or carry it to a predetermined place and consume it. These disposable products are from lunch boxes containing food to skewers and toothpicks for cooking. It has been developed and is now widely used in restaurants.

Packaging containers and disposable utensils are articles that are used in large quantities in everyday life by modern people. In particular, disposable utensils and tableware packaging plates have become a mainstream means for storing or packing foods for personal hygiene and convenience. Polypropylene or the like is mainly used as such a disposable tableware or food packaging dish, but the plastic tableware and packaging dish as above are not suitable as a food container. This is because high heat releases toxic substances. Many manufacturers, however, tolerate contamination problems for reasons of low manufacturing costs, and continue to use them because of the user's ease of use or disposal. It also carries a potential risk of harming the user's health.

Moreover, disposable tableware or food-welding dishes made of plastics cause serious environmental pollution.

In addition, when the food contained in disposable products such as lunch boxes or trays made of such synthetic resin materials is used as livestock feed, the disposable products cannot be used for food for livestock, and thus the inconvenience of having to collect them every day is not only followed. If the collection is not done, there is a risk of harm to livestock.

In addition, even if such disposable items such as lunch boxes and trays are collected after being used, they are not easily decomposed in the soil due to the nature of the material, causing environmental pollution. More seriously, some of the disposable products currently commonly used are harmful to the human body. There is a problem that it contains a component that affects.

According to Korean Patent Laid-Open Publication No. 2000-67282 published on Nov. 15, 2000 as a method for manufacturing a naturally degradable disposable food container made from vegetable fibers to solve these problems, 50-200 mesh 60 to 73% by weight of vegetable fiber, 20 to 30% by weight of soybean meal, 2 to 4% by weight, 1 to 5% by weight of salt, 3 to 5% by weight of binder, 2 to 3% by weight of water Disclosed is a method of manufacturing a disposable food container by compression-mixing and extruding it into a pellet form until the naturally-generated heat of ˜90 ° C. is maintained, then extruding it into a plate shape and compressing the plate with a compression molding machine. have.

The technique is complicated because the extrusion of pellets into a mixture of vegetable raw materials and extrusion of the extrudate into a plate to compression molding the plate-like extrudate with a molding machine to produce a disposable food container. Parts other than the part molded into water in the container have a problem that loss of material occurs.

Further, according to Korean Patent Laid-Open Publication No. 2001-16110 published on March 5, 2001 as a disposable container, the plant stem powder and grain flour were mixed at a ratio of about 70:30, and this raw material was used. Edible glue was added to the mixture to make a roll-shaped fabric, and the roll-shaped fabric was passed through the upper mold and the lower mold to form a container, and then coated on the surface of the upper mold to be coated simultaneously with the production of the container. A technique relating to a disposable container is disclosed.

Since this technique manufactures disposable food containers after making roll-shaped fabrics with a mixture of vegetable raw materials, the process is complicated, and there is a problem that loss of material occurs in portions other than the parts formed into containers in the roll-shaped fabrics.

In addition, according to Korean Patent Application Publication No. 1998-30457 published on July 25, 1998 as a disposable container, a small tray-shaped mold after kneading a foaming agent, a dye and an animal protein as a tissue strengthening agent in flour The present invention relates to a container that is baked, cooled, and then coated with a waterproof coating on a surface thereof to coat a thin film, or to paste paper, aluminum foil, PE film, or paraffin paper.

This technology uses expensive flour, and the paper, aluminum foil, PE film, or paraffin paper used to paint on the surface of the container or the container is not easily rotted or decomposed to cause environmental pollution.

Accordingly, the present invention is to solve the above problems, the first object of the present invention is to provide an environmentally friendly, pollution-free disposable container manufacturing method that is completely decomposed by producing a container using a grain shell.

A second object of the present invention is to provide a method for producing a disposable container harmless to the human body.

A third object of the present invention is to provide a molding process and manufacturing apparatus for a disposable container that achieves the above objects.

1 is a state in which the molding raw material is injected into the mold of the present invention

Figure 2 is a state in which the molding raw material compressed to the upper mold in the present invention

Figure 3 is a state after lifting the upper mold after compacting the molding raw material in the present invention

4 is a state in which the molding is separated from the lower mold by the internal mold of the present invention;

5 is a state in which the internal mold and the molding is separated by blowing air through the air inlet formed in the internal mold of the present invention

According to the invention,

Mixing rice straw powder from 78 to 95% by weight, rice flour from 4 to 17% by weight and maltose by 1 to 5% by weight, the mixture of rice straw powder, rice flour and maltose for 30 to 90 minutes at a temperature of 90 to 130 ℃ or less First sterilization, compression molding the sterilized mixture into a container, applying bran wax to the surface of the container and drying the container, and secondly for 30 to 60 minutes at a temperature of 90 to 120 ° C. First invention of a method for producing a disposable container comprising the step of sterilization and drying,

Stirring 3.4% by weight of malt sugar and 25.2% by weight of water and fumigation at a temperature of 90 to 130 ° C., adding 16.8% by weight of rice flour to the mixture of water and adding 54.6% by weight of rice straw powder to the stirred mixture. Stirring again, compression molding the mixture of maltose, rice flour and rice straw powder to form a molding, drying the molding, applying and drying bran wax on the dried molding, the bran wax The second invention of the manufacturing method of a disposable container comprising the step of sterilizing the applied molding,

An upper mold, a space for accommodating the upper mold, a lower mold having a hole formed in the lower surface of the space, and an upper portion of which is plate-shaped, and an air inlet through which air can pass through the upper plate. A third invention of the apparatus for manufacturing a disposable container having a push rod, the apparatus including an inner mold installed in a space of the lower mold and movable up and down;

Positioning a plate-shaped inner mold on a lower surface of the space of the lower mold, injecting molding material into the space of the lower mold, and pressing the upper mold into the space of the lower mold to compress the molding material in the space. Forming the raw material into the shape of a container, removing the pressure of the upper mold and lifting the upper mold, and separating the molded product formed by the compression from the lower mold from the lower surface of the space part. The fourth invention of the manufacturing method of the disposable container is provided, comprising the step of pushing up, blowing the air into the air inlet of the inner mold to separate the molding from the inner mold.

Hereinafter, the present invention will be described in detail through examples.

Example 1

76.5 g of rice straw powder, 3.4 g of rice flour and 0.85 g of malt were evenly mixed. The mixture was then first sterilized for 30 minutes at 130 ° C., 2.5 mm thick, 85 g thick and volume compressed into 500 ml round containers and 600 ml square containers, respectively, and dried. After drying, bran wax adhesive PB-03 was applied to the container and dried after secondary sterilization at 120 ° C. for 30 minutes.

The PB-03 bran wax adhesive used in this example was manufactured by Beijing Eastern Field Chemical Co., Ltd., China, and proved to be non-toxic.

The naturally degradable non-toxic disposable container of the present invention is prepared as follows.

That is, rice straw powder 75 to 95% by weight, rice powder 4 to 17% by weight and malt sugar 0.9 to 5% by weight evenly mixed. Rice straw is entangled with each other so that the container is tightly coupled, and natural decomposition is fast and easy to purchase, and the container prepared as described above has the advantage that it can be decomposed and recycled into animal feed.

By mixing rice straw powder, rice flour and maltose in the above-mentioned amounts, the container shows an optimal strength during compression molding and is molded into a rigid container in use.

Since maltose (dextrin) is well decomposed in water, it speeds up the decomposition rate of disposable containers and contains sugars such as amylase and diastases, which helps to break down by microorganisms and supplements the loose components of rice straw to make them into rigid containers. .

If maltose is used at less than 0.9% by weight, the container is fragile and when used at 5% by weight or more, the container is easily deformed.

Rice straw powder, rice flour and maltose are uniformly mixed in the above ratio, and then sterilized first at 90 to 130 ° C. for 30 to 90 minutes. At this time, if the time and temperature do not match each other, it will appear black as the container is burnt, and because it does not have sufficient strength, it cannot maintain the shape of the container. Therefore, if the temperature is high within the temperature and time range, sterilization is slightly longer at low temperatures within a short time.

After primary sterilization, compression molding is performed to form a desired container.

Compression molding into a container may be performed according to a general disposable container compression molding method, and may be performed by the manufacturing apparatus and molding process of the present invention to be described below.

After molding, bran wax is applied to the molded container and dried. The bran wax is extracted from rice bran, also called bran, and is mainly composed of glycerol of erucic acid, linolenic acid and palmitic acid. Bran wax serves as an adhesive. Bran wax is harmless to the human body and harmless to the environment because it can be decomposed in the natural state. By applying bran wax to the molded container as an adhesive, it has a moisture-proof effect, prevents water leakage when using the container, and prevents bacterial invasion into food. The bran wax adhesive is used in an amount of 0.1 to 3% by weight based on the weight of the container.

Bran wax adhesive is applied and dried, and then sterilized at 90 to 120 ° C. for 30 to 60 minutes. After the sterilization treatment, the bran wax is hardened by drying. In addition, by the second sterilization process, the shape of the container is prevented from being deformed or crushed and deformed.

Example 2

30 ml of water is added to 4 g of powdered maltose, and the mixture is stirred to form a gel. When the gel is fumigated at 90 to 130 ° C., the mixture becomes full.

Stir 20 g of this malt sugar and 40 grams of rice flour, and 65 grams of rice straw powder of about 40 grams together with a mixture of maltose and rice flour.

At this time, when mixing the mixture of malt sugar and rice straw rice straw in the state of the grass at the same time, the rice powder and rice straw powder aggregates or the rice flour or rice straw powder is insufficient, the density and strength of the entire container is not uniform.

The molding raw material, which is a stirred mixture as described above, is put into a mold and compressed into a hydraulic press at a pressure of about 22 to 25 tons per container to form a disposable container. Compression molding at a pressure lower than this pressure makes the surface of the container rough and lowers the strength of the container, while compression molding at pressures higher than this pressure improves the surface roughness of the container and increases the strength of the container.

The water content in the compression molded container is about 25% by weight when extracted from the molding machine, and naturally dried so that the water content is less than 9% by weight, or air-dried in a heating furnace at 20 to 40 ℃.

The dried container coats the surface of the container with a coating agent for moisture proofing, waterproofing and oilproofing of the container, and the container is dried to harden the coating agent by applying hot air at 80 to 120 ° C. The coating agent used in the present Example was used as a coating agent to improve the PB-03 used in Example 1 manufactured by Beijing Eastern Field Technology Co., Ltd. in China.

The vessel is then subjected to infrared sterilization for about 4 minutes.

Example 3

In this embodiment, the apparatus and the molding process used for the molding process for producing the container of the present invention will be described.

1 is a state diagram in which a molding raw material is injected into a mold of the present invention.

The mold used in the apparatus for manufacturing the container of the present invention is composed of an upper mold 10, a lower mold 30 and an inner mold 20 as shown in FIG. The upper mold 10 and the lower mold 30 have similar structures as the molds generally used. However, the lower mold 30 has a space for accommodating the inner mold 20. The lower mold 30 also has a lower hole 31 that leads from the center of the space forming the molding to the lower face of the mold.

The inner mold 20 is inserted into the lower mold 30. The inner mold 20 has a structure capable of supporting the bottom portion of the container, which is the molded product 42, and a pusher 21 is formed thereunder. Moreover, the air inlet 22 through which air flows is provided in the inside of the rod 21. As shown in FIG.

The shaping | molding process for manufacturing the container of this invention is demonstrated.

In order to mold the container of the present invention, as shown in FIG. 1, the inner mold 20 is placed at the bottom of the lower mold 30. The molding raw material 41 is injected into the space formed by the lower mold 30 and the inner mold 20 in an amount sufficient to produce a container. Here, the molding raw material 41 is the molding raw material mixed by stirring in Example 1 and 2.

Figure 2 is a state diagram in which the molding raw material is compressed by the upper mold in the present invention.

As shown in FIG. 2, when the upper mold 10 is press-fitted to compress the molding raw material 41 shown in FIG. 1, the wall formed by the lower mold 30 and the inner mold 20 and the upper mold 10 are formed. A molding 42 is formed between the walls.

Figure 3 is a state diagram lifting the upper mold after compacting the molding raw material in the present invention.

As shown in FIG. 3, the pressure in the upper mold 10 is removed and the upper mold 10 is lifted. At this time, the molding 42 is attached to the inner wall formed by the lower mold 30 and the inner mold 20. Since the molding 42 is not completely hardened, in this state, when the molding 42 is applied from the outside to separate from the lower mold 30, the molding 42 is changed in shape. .

4 is a state diagram in which the molding 42 is separated from the lower mold 30 by the internal mold 20 of the present invention.

As shown in FIG. 4, when the pusher 21 formed in the lower portion of the inner mold 20 is pushed up by the raising device of the inner mold 20, the molding 42 is lowered. It is separated from the mold 30. At this time, since the molded article 42 is not completely hardened, and the molded article 42 is removed from the internal mold 20 in this state, the shape of the molded article 42 is changed by the mold.

5 is a state diagram in which the internal mold 20 and the molding 42 are separated by blowing air through the air inlet 22 formed in the internal mold 20 of the present invention.

Therefore, as shown in FIG. 5, when the air 51 is blown through the air inlet 22 formed in the pusher 21 from the air compressor (not shown), the molding 42 is separated from the surface of the inner mold 20. It is possible to separate from the inner mold 20 without deforming the molding 42 which is not completely hardened.

[Inspection of Container of the Invention]

The compressive strength, the fire-dissipating performance, the water resistance, the non-gravity performance, the appearance test, and the like of the disposable containers of the present invention thus prepared were performed.

Compressive strength

The vessels were not deformed even when the glass plate was placed on the vessel and a load of 10 kg was applied.

Fire extinguishing performance

When the prepared containers are put in two pieces of water at room temperature, after 48 hours the container becomes a pool shape. It melts in 24 hours in water containing microorganisms and small animals such as natural rivers, lakes and rice fields.

Water resistance performance (as defined in Appendix A2 of QB / 2341)

When the water containing more than 95 ℃ in the prepared vessels water is leaked after 24 hours.

Negative performance (5.4 regulations in TB / T2611)

The prepared containers were not deformed at the weight conditions of 10 kg or more.

Sanitation standard

The containers are in full compliance with the National Food Packaging Hygiene Standards.

① Lead 0.0002mg / ℓ

② Cadmium, bacterial colonies, coliform bacillus, green bacillus bacillus, golden yellow staphylococcus, and lytic streptococci are not detected.

③ The total number of fungal colonies is less than 10 CFH / ㎠

In addition, the prepared container was not deformed by hot water of 90 ° C. or more within 12 hours, and can be stored for 1 to 2 years without unpacking.

Disposable container produced by the present invention is harmless to the human body and can be easily decomposed in the natural state, there is no problem of environmental pollution because it can be used as fertilizer by recovering the used disposable container of animal feed or ferment it.

The disposable container of the present invention is excellent in water resistance and strength in its use.

Disposable container of the present invention is not manufactured in the form of plate or roll after forming the raw material at the time of manufacturing, but instead of manufacturing the container, the raw material for the production of one container is put into the mold as necessary, and compression molding to reduce the molding material It can be effective.

In addition, according to the manufacturing process and the manufacturing apparatus of the present invention, there is no change in the molded article of the container during the manufacturing process, so that the yield of the container production can be improved, and the mass production can be performed in a short time.

Claims (5)

Mixing rice straw powder from 78 to 95% by weight, rice powder from 4 to 17% by weight and maltose by 1 to 5% by weight, First sterilizing the mixture of rice straw powder, rice flour and maltose at a temperature of 90 to 130 ° C. for 30 to 90 minutes, Molding the sterilized mixture into a container by compression molding; Applying bran wax to the surface of the container and drying, and second sterilization and drying for 30 to 60 minutes at a temperature of 90 to 120 ℃ Method for producing a disposable container comprising a. Stirring 1 to 5% by weight of malt sugar and 20 to 26% by weight of water to fum to a temperature of 90 to 130 ℃, 4 to 19% by weight of rice flour was added to the maltose mixed with water and stirred, and 50 to 75% by weight of rice straw powder was added to the stirred mixture, followed by stirring again. Compressing the mixture of the maltose, rice flour and rice straw powder to form a molded product, Drying the molding, Coating and drying bran wax on the dried molding, Method of producing a disposable container comprising the step of sterilizing the molded article coated with bran wax. The method of claim 2, Maltose 3.4% by weight, water 25.2% by weight, rice flour 16.8% by weight, rice straw powder 54.6% by weight manufacturing method of a disposable container characterized in that. Upper mold, A lower mold having a space for accommodating the upper mold, and having a hole formed on a lower surface of the space, The upper part is plate-shaped, under the upper plate has a push rod formed in the air inlet through which the air flows, and the inner mold which is installed in the space portion of the lower mold and can move up and down Apparatus for producing a disposable container comprising a. Positioning a plate-shaped inner mold on the lower surface of the space part of the lower mold, Injecting molding material into the space of the lower mold; Pressing the upper mold into the space part of the lower mold to compress the molding material in the space to mold the molding material into the shape of a container; Removing the pressure of the upper mold and lifting the upper mold; Pushing up the inner mold from the lower surface of the space part to separate the molded article formed by the compression from the lower mold; Blowing air into the air inlet of the inner mold to separate the molding from the inner mold Method for producing a disposable container comprising a.