KR20030046161A - Compostion of food container using plant fiber and process for preparation thereof - Google Patents

Abstract

PURPOSE: A composition based on a vegetable fiber is provided to obtain a disposable food container which is environmentally and ecologically favorable. A process for producing the disposable food container is also provided. CONSTITUTION: The composition for a food container comprises 98 wt% of a vegetable fiber, 1 wt% of a natural vegetable adhesive and 1 wt% of a coating paint. The composition further comprises 0.2 to 10 wt% of gums. The process for producing a disposable food container comprises the steps of: (S1) preparing vegetable fiber powders, (S2) mixing the vegetable fiber powders with the natural vegetable adhesive, rolling and cutting them into a predetermined length, forming them into the shape of container through a mold, (S6) heating and solidifying the formed container for a time more than 1 hour in a constant temperature room with blowing by an electric fan, and (S8) coating a paint on the container.

Description

Composition for food containers based on plant fiber and method for manufacturing disposable food containers using the same

The present invention relates to a composition for a food container and a method for producing a food container using the same, and more particularly, the present invention relates to a composition for food containers based on plant fibers and a method for producing a disposable food container using the same.

According to the standards of utensils, containers and packaging used in the food processing and food industries around the world, they should generally not be physically or chemically contaminated, and solder should not be used in contact with food. In case of using colorant, only colorant allowed by food hygiene law should be used.

On the other hand, materials used in utensils, containers and packaging used in the food processing and food industries include synthetic resins, cellophane (regenerated cellulose), natural or synthetic rubber, and paper or paper based on pulp. Processed wood, glass, ceramics or other enamels may be placed, except for bark of pretreated paper, metal consisting of metal, bark of tree trunks or branches.

The most commonly used containers and packaging materials include synthetic resins, such as polyvinylchloride (PVC), polyethylene (PE), polypropylene (PP), and polychlorovinylidene (PVDC). ), Polyethylene terephthalate (PET), phenol resin (phenol formaldehyde (PF)), melamine resin (melamineformaldehyde (MF)), urethane resin (ureaformaldehyde (UF), polyacetal [polyacetal, polyoxy methylene (POM)], poly Carbonate (polycarbonate), polyvinylalcohol (PVA), butadien resins (BDR), polybutylene terephthalate (polybuthleneterephthalate (PBT)), polyacrylsulfon (PASF), polyacrylonitrile polyacrylon, trile, PAN), fluoro resins (FR), and the like.

However, the container and packaging paper produced by the synthetic resin is limited to the strict specifications for the manufacturing process and products, heavy metal elution restriction, evaporation residue restriction and environmental hormones should not be discharged. In particular, when containers and packaging papers, mainly composed of synthetic resins, become industrial waste after use, there is a problem that dioxin, which is a carcinogen, is discharged when incinerated.

In addition to the release of environmental hormones, when these wastes are buried in soil, they have not been degraded by soil microorganisms, which has been a serious environmental obstacle.

The present invention has been devised in view of the defects of the container and packaging mainly made of the above-mentioned synthetic resins, and is a novel type mainly based on natural fibers which are free from heavy metal contamination and do not have evaporation residues. It is an object of the present invention to provide a method of manufacturing a disposable food container with advanced maneuvers.

Another object of the present invention is that there is no fear of the release of environmental hormones such as carcinogens such as dioxin when incinerated in the treatment after using the disposable food container once, even in the case of landfill in soil in the treatment method It is easily decomposed by the soil to provide a disposable food container with no soil pollution.

The object of the present invention was achieved by making a composition based on plant fibers, and then using the same, manufacturing a food container through a complex molding, chain molding, complete molding, heat solidification, coating coating step. Hereinafter, the configuration of the present invention will be described in detail for each process and embodiment, but the scope of the present invention includes a change in process and a numerical value and material.

1 is a process diagram showing a manufacturing process of the disposable food container of the present invention in a block diagram

Figure 2 is a photograph showing a disposable food container prepared according to the preferred embodiment of the present invention.

Figure 3 is a photograph showing a disposable food container prepared by another embodiment of the present invention.

Fiber of plants that can be used to achieve the above object of the present invention include rice bran (chaff), barley bran, wheat bran, Maize core sugar cane powder (Maize core). It is also possible to use each of these materials, or to mix a certain ratio, and freely use them in a weight ratio of 50:50, 30:70, 70:30, etc., and these plant fibers contain 98% of the total weight of the disposable food container composition. It is preferable.

Plant fiber is preferably less than 10% moisture content is well dried and not altered, the particle size of the pulverized powder is preferably 80 ~ 120 mesh.

In the composition for food containers, any of the vegetable natural adhesives used in the present invention may be foil, and 1% by weight of the whole composition may be used.

Paint is used as a coating material in the remaining food container composition as a preferred coating material can be used as long as the coating material is waterproof and excellent flame retardant and does not dissolve in oil (Oil). The said paint shall use 1 weight% with respect to the whole food container composition of this invention. As the waterproofing, flame retardant, and oil-soluble patterning material that can be used in the present invention, a coating material can be generally used, and other known paints can be used, for example, a known paint product XB4001 (conlyocryatate, eriloifien, ploticigen, a mixture of thlenen wofn and an antifoaming agent) can be used.

In addition, when necessary, a silicone resin in which siloxane resin is crosslinked with dibutyl tin dilaurate, staners oleate, tetrabutyl titanate, or the like, or a polymer epoxy resin mainly composed of bisphenol A and epichlorohydrin is used as a coating agent.

In addition, in order to increase the moldability, coagulation and elasticity of the food container of the present invention, 0.2-10% by weight of guar gum, locust bean gum, carrageenan, gelatin and agar, which are industrial gums used in food processing or confectionery or paint, etc. Can be used as

Hereinafter, the disposable food container manufacturing method of the present invention will be described in detail with reference to FIG.

First step: raw material grinding step (S1)

Rice bran (including chaff), barley bran, wheat bran, corn stalk powder, sugar cane powder are mixed in a predetermined ratio or put into a grinder and prepared to grind to prepare a powder thereof, the powder degree is 80 ~ 120 mesh range.

At this time, the dryness of the final raw material pulverized product (powder) is preferably used in the moldability, strength, etc. of the container of less than 12% moisture content.

Second Process: Mixing Process (S2)

The plant fiber powder prepared by grinding each of the first process materials or mixed at a constant ratio is added to a blender, weighed and added to the total weight of 100, and weighed with grass paste. Mix. At this time, the lid is opened, and the final product is mixed with water after adding a stock price to promote homogenization without the basic color difference of the raw materials. At this time, in order to comprehensively improve the moldability of the food container, the solidification upon heating and the elasticity of the final product, 0.2 to 10% by weight of the polysaccharide material is added, and 0.2 to 0.7% by weight of the pigment is used to express the color.

Third Process: Complex Molding Process (S3)

Through the second process, the homogeneously mixed raw materials are placed in a complex molding machine and the speed is controlled. At this time, the speed and interval of the rolling roller (Roller) is adjusted.

Cut the raw material mixture such as rolled rice bran to a certain size.

4th process: Chain forming process (S4)

In the third step (composite step), the raw material taken down on the conveyor is chain-rolled to have a uniform thickness. At this time, make sure that there is no color difference between raw materials after rolling.

When adjusting the rolling rollers, pay attention to the parallelism between the rolling rollers.

5th process: complete molding process (S5)

As a step of completely molding the raw material obtained in the fourth step (S4) as a container, the fully formed product should be uniform in thickness, free of cracks, and free from holes and deformation.

The operator should press the hydraulic button and the mold button with both hands at the same time. From time to time, foreign matter on the mold is removed, and defective parts are screened and inspected.

Defective products in the chain forming process and the complete molding process are put back into the grinder as recycled raw materials and used as recycled raw materials.

6th Step: Heat Solidification Process (S6)

The step of heating and solidifying the vessel produced through the hydraulic press and the complete molding mold of the fifth step, this process is carried out in a heating room (heating room) that can be hot-air drying.

Before proceeding with this process, adjust the temperature of the heating device of the heating product, start the fan and the automatic temperature control system, start the electric device, adjust the speed, place the container to be solidified in the heat dryer, and operate it continuously. 2 and 3).

Step 7: paint coating process (S7)

After finishing the sixth step (S6) to coat the paint using an automatic spray. For the container conveyed by heating conveyor, adjust the coating composition according to the raw ingredients mixed in the first step, but use the coating agent as a coating material, a known paint ingredient, or a synthetic resin coating agent selected from silicone resin and epoxy resin. Adjust the content of ingredients according to the level of 1%, then adjust the heating room temperature of each stage, start the electric fan and the thermostat system, start the electric machine, adjust the speed, and adjust the paint spray system and work tool. After adjustment, the container is spray coated by continuous automatic operation as installed in the machine and then heated.

Eighth Step: Packing Process (S8)

The defective product is removed from the container that passed through the seventh step (S7), and only the passed product is packed through the packing machine and sealed in a BOX or a bag.

Hereinafter, the preferred embodiment of the food container production of the present invention.

Example 1

The powder is 100 mesh size, water content 12% 4.9kg of rice bran and 50g of grass were added to the blender and mixed until homogeneous. In mixing, 2.1 L of pure water was mixed with the stock.

5kg of the homogenized container raw material is placed in the compound molding machine, and the rolled material coming out of the conveyor is cut to 30cm length while adjusting the speed and interval of the rolling roller while adjusting the speed. After roll forming, it was put into a mold and completely formed into a desired container. The photograph shown on the left side of FIG. 1 is manufactured according to this embodiment.

The fully molded container is heated and solidified by a fan for more than 1 hour in a heating room maintained at 70 ° C. using a conveyor, and then using a known automatic spray paint heating system only inside the container using an epoxy resin composition. Coated. (The final container product Figure 1 Left container and right lunch box container) The defective product was removed, sealed and packed into a sample box.

Example 2

Disposable container raw material material was carried out in the same manner as in Example 1 except for using a maize core powder having a powder size of 100 mesh and a water content of 12%. The coating material was commercialized using silicone resin. (See the three product photos at the bottom center of Figure 3.)

Example 3

The same raw material as in Example 2 was used, but in the mixing process of the container raw materials, 25 g of green pigment and red pigment were added to prepare colored containers. (See Fig. 3 left green container and right red container)

Example 4

A disposable food container raw material was prepared in the same manner as in Example 1 except that barley bran was used.

Example 5

The disposable food container raw material was prepared in the same manner as in Example 1 except that the bran was used.

Example 6

Disposable food container raw materials were prepared in the same manner as in Example 1 except that sugar cane bran powder was used.

Example 7

The method of manufacturing a disposable food container is the same as that of Example 2, but in order to improve the moldability of the food container in the mixing process of Example 2, the solidification during heating and the elasticity of the final container product, the guar gum (gum guar) 2.5 The product was put into kg. (See also the two container photos shown in the upper middle of FIG. 3)

Example 8

A disposable food container was prepared in the same manner as in Example 7, but the same amount of locust bean gum was used as the polysaccharide material instead of guar gum.

Example 9

A disposable food container was prepared in the same manner as in Example 7, but was commercialized using the same amount of carrageenan instead of guar gum.

Example 10

A disposable food container was prepared in the same manner as in Example 7, but the same amount of gelatin was used instead of guar gum.

Example 11

A disposable food container was prepared in the same manner as in Example 7, but a disposable food container was prepared using the same amount of agar.

Example 12

Prepared in the same manner as in Example 1 or Example 2, the same amount of the coating material was used as the coating material.

Example 13

In the same manner as in Example 1 or 2 to prepare a disposable container product, the coating material was a known paint product XB4001 was used.

As described above by the process and preferred embodiments and photographic drawings, the present invention has the effect of providing a new disposable food container that does not exist so far produced based on vegetable fibers such as rice bran, barley bran and moreover Food containers mainly made of the same plant fiber can be incinerated when disposed of as garbage with food even after being used in large quantities in hotels, restaurants, hospitality, restaurants, etc. It is effective in discharging environmental hormone dioxin, a carcinogen generated from disposable containers, and it is excellent in supplying fiber even when the disposable container of the present invention is directly fed to livestock such as cattle, sheep and pigs when disposed. It works.

In addition, the disposable food container of the present invention, which is predominantly made of vegetable fibers, is easily decomposed by 70% or more of microorganisms within one month even if it is buried in soil during disposal. It is an eco-friendly invention without any fear of contamination.

In addition, the disposable food container of the present invention has an excellent waterproof and flame retardant effect by appropriate use of a coating material, and when manufactured by proper mixing of a polysaccharide polymer, it has an effect of obtaining a product having improved water retention, moldability and elasticity, and a food hygiene method. The addition of a permissible pigment is a very useful invention in the food packaging industry because it has an excellent effect of obtaining a colorful and unique color container.

Claims (6)

A composition for disposable food containers based on plant fibers, characterized by consisting of 98% by weight of plant fibers, 1% by weight of vegetable natural adhesive, 1% by weight of coating paint. The composition of claim 1, wherein the plant fiber is any one or a mixture of rice bran, barley bran, wheat bran, corn sack powder, and sugar cane bran powder. The composition of claim 1, wherein the paint is selected from cloth material and synthetic resin. A method of producing a disposable food container, the method comprising: preparing a plant fiber powder; Mixing the plant fiber powder and the vegetable natural adhesive; Complex molding process for cutting to a certain size while rolling it; Chain rolling forming a predetermined thickness; Forming the container completely through a mold; Heating and solidifying the molded container with a fan in a constant temperature room at 70 ° C. for at least 1 hour; Disposable food container manufacturing method based on plant fibers, characterized in that it comprises a coating coating process. 5. The method according to claim 4, wherein the polysaccharide material is added in an amount of 0.2 to 10% by weight in order to improve the moldability of the food container, the coagulation property upon heating, and the elasticity of the first product. 5. The method according to claim 4, wherein 0.2 to 0.7% by weight of a pigment is added to express the color of the food container in the mixing step.