KR20130042748A - Composite using eco-natural materials for manufacturing biodegradable disposable container - Google Patents

Abstract

PURPOSE: A composition using an environmentally friendly natural material is provide to improve following performance by mixing mica-based clay mineral powder to starch, to improve preservative period, to have excellent biodegradability, and to modify soil. CONSTITUTION: A composition using an environmentally friendly natural material comprises 60-70 weight% of starch, 5-10 weight% of mica-based powder, 10-15 weight% of a vegetable extraction reinforcing agent, 3-5 weight% of additives. The mica-based powder is selected from illite, mica, biotite, muscovite, phlogopite, sericite, germanium, vermiculite, and tourmaline. The vegetable extraction reinforcing powder is obtained by powderizing a cornstalk, rice hulls, pusher, bean-curd dregs, or reed. The additive is selected from wetting agent, water repellent, and fixing agent.

Description

Composite using eco-natural materials for manufacturing biodegradable disposable container

The present invention relates to a composition for use in the manufacture of disposable containers, in particular, mica-based clay minerals are mixed in the starch to improve food freshness, leading to a longer shelf life of the container, biodegradation during landfill disposal in soil due to heavy metal adsorption It relates to a composition using environmentally friendly natural materials for the production of biodegradable disposable container that can modify the soil.

The business of eco-friendly disposable containers is a business and an obligation of both the state and society. It is also a good project for our farmers who are suffering from free trade agreements (FTAs), which can be used as alternative crops, and in line with the government's green growth projects. Eco-friendly disposable containers are eco-friendly compared to existing petrochemical products such as shape, rigidity, and design, and are sufficiently competitive in terms of price.

Due to the change in diet, the consumption of fast food and fast food is increasing, and thus the demand for disposable containers that are easy to pack in small quantities and hygienic is greatly increased. In this situation, the supplier's handling of instant and fast food intake is changing from glass or pottery to disposable containers.

The most widely used disposable containers include products made of foamed polystyrene (styrofoam), which is a synthetic resin, and paper cups, paper plates, paper trays, etc., made by coating polyethylene, polypropylene, and the like on paper.

However, these disposable containers are rarely degraded by transition metals or microorganisms when they are landfilled. In addition, incineration generates a large amount of harmful gases such as dioxins, carbon monoxide, benzene, toluene and styrene dimers and environmental hormones.These harmful gases cause damage to the human body such as global warming, environmental pollution such as air pollution, and human genetic modification. There is a problem that has a significant harmful effect.

Biodegradable polymers that are similar in nature to conventional synthetic resins and are easily decomposed by microorganisms in nature. Aliphatic polyester through chemical synthesis, polyhydroxy alkanoate (PHA) and polyhydroxy butylate (PHB) by fermentation. ) And cellulose, which is a natural polymer, may be used.

Among them, interest in biodegradable polymers containing starch, which is most abundant in the natural world, is getting the most attention.

Conventional biodegradable containers have a simple manufacturing method and similar physical properties to expanded polystyrene (styrofoam), but have problems due to the addition of hardly degradable raw materials among additives used in addition to natural polymers, and are difficult to commercialize due to their high price. have.

As a background technology of the present invention, there is a Korean Patent Publication No. 10-2009-035823. The coated paper is attached to at least one side of the starch structure and the starch structure, wherein the starch structure is from 86.21 to 97.10 wt% of the starch and the coating paper contains 2.90 to 13.79 wt%, and the coating agent forming the coating layer of the coated paper is silicone emulsion : Provides a biodegradable starch container characterized by using a wax emulsion in a weight ratio of 1: 1.

Therefore, in the background art, by forming biodegradable coated paper on at least one side of the starch container, a starch container suitable for the notice of the Ministry of Environment of Korea is maximized by maximizing the starch content, and water, oil resistance and Solve acid resistance.

However, the background art is low in degradability due to the coated paper to form a coating layer is insufficient in the environment. In addition, there is a problem that can not improve the soil, can not increase the freshness or lead storage period of the food contained in the container.

Korean Patent Laid-Open Publication No. 10-2009-0035823 proposes a 'method for producing a biodegradable disposable container and its composition'. The present invention relates to a method and a composition for preparing a biodegradable disposable container which is biodegradable by natural microorganisms, while having similar appearance and physical properties as conventional foamable polystyrene disposable containers using powder and starch pulverized as a natural polymer, corn stem. In the composition of a biodegradable disposable container using a natural polymer, 40-50% by weight of powder pulverized corn 200 to 400 mash after producing the corn with the natural polymer, tapioca, corn, rice, Any one or two or more vegetable starches, such as potatoes and sweet potatoes, 20-30% by weight of mixed starch, and 5-10% by weight of pulp and 5-10% by weight of maltitol as a foaming and plasticizer Presenting a composition of a biodegradable disposable container using. Korean Patent No. 10-1018053 proposes a composition of a biodegradable disposable container using a natural polymer. The main ingredient is starch, which is a high biodegradable natural polymer, and various functional substances are mixed with the starch, thereby solving environmental problems such as incineration, recovery, and landfill contamination, as well as feed and compost of plants and animals. It is designed to obtain eco-friendly effect that can be recycled, and it is 75 ~ 85% by weight of natural polymer starch, 1 ~ 20% by weight of plasticizer mixed with any one or two of chlorinated paraffin or epoxidized soybean oil, 0.5 to 3% by weight of lignin, 0.3 to 5% by weight of a mixture of any one or two of the flour of a release agent or micelle of a surfactant, 0.5 to 3% by weight of polysorbate as an emulsifier, and 0.5 to 4% It is comprised by weight% methylcellulose and 0.5-3 weight% sugar as a water-soluble mixture to reinforce the tenacity and strength with respect to a disposable container. However, these patent documents 1 and 2, although the container is naturally decomposed in the soil, it does not have an element that can improve the soil. In addition, there is a problem that can not increase the freshness or lead storage period of the food contained in the container.

The present invention was devised in view of the above circumstances, and the mica-based clay minerals are mixed and manufactured in starch to improve food freshness, increase the freshness retention period of the container, and biodegrade when landfill is disposed of in soil to absorb heavy metals. To provide a composition using environmentally friendly natural materials for the production of biodegradable disposable container that can be modified.

Composition using eco-friendly natural materials for the production of biodegradable disposable container according to the preferred embodiment of the present invention,

60 to 70% by weight of starch mixed with one or more selected from potatoes, sweet potatoes, corn and the like;

5-10 wt% of mica-based powder powdered by one or more of illite, mica, earth mica, white mica, gold mica, mica, germanium, vermiculite vermiculite and tourmaline;

10-15% by weight of vegetable extract reinforcement powder powdered with plants such as cornstalks, rice hulls, wheat straws, sesame seeds, and reeds and mixed with one or more of them;

Other wetting agents, fertilizers, water repellents, such as fixing agent is characterized in that it contains 3 to 5% by weight.

In addition, starch is characterized in that the soy flour is contained in 10% by weight relative to the starch.

In addition, the vegetable extract reinforcement powder is characterized in that it further comprises a powder extracted from reeds, silver grass, crests.

In addition, the vegetable extract reinforcement powder is characterized in that it further comprises burlap, ramie grass.

In addition, the sodium alginate extracted from the seaweed is characterized in that it further contains 20% by weight based on the additive.

In addition, the starch is characterized in that it further comprises a seafood extract of 10% by weight or less based on the starch.

In addition, the mica-based clay mineral is characterized in that the pulverized to the size of 325 mesh was used.

The composition using eco-friendly natural materials for the production of biodegradable disposable containers of the present invention, the mica-based clay minerals are mixed and manufactured in starch to improve the food freshness, the leading shelf life of the container is increased, biodegradable when discarded in landfills and heavy metals Adsorption can modify the soil.

In addition, the mechanical properties such as compressive strength and tensile strength of the container can be improved by the mica-based clay mineral.

Disposable container using the composition according to the present invention contains the mica-based clay minerals to increase the freshness and freshness of the food, and improve the mechanical properties such as compressive strength. That is, the freshness of vegetables, fruits, and livestock products is extended by several days or more than general styrofoam containers and paper containers due to the release of far infrared rays and anions of mica-based clay minerals. Strength is increased.

In addition, by the components contained in the mica-based clay mineral has the advantage that the soil is improved when landfilling.

Composition using environmentally-friendly natural materials for the production of biodegradable disposable container according to a preferred embodiment of the present invention, 60 to 70% by weight of starch that is mixed with one or more selected from potatoes, sweet potatoes, corn and the like. Starch is weakened as a binder when the content is lowered to 60% by weight or less, biodegradability is lowered. In addition, when the content of starch exceeds 70% by weight, it takes up a lot of the overall manufacturing cost and is economically inferior.

At this time, the starch is to act as a binder and the elements containing the mica-based powder described below are those that occur quickly by the feeding activity of the microorganisms when buried in the soil.

In addition, the composition contains 5 to 10% by weight of an illite clay mineral. This will increase the weight of the container and increase the production cost if the mica-based powder is incorporated more than necessary. In addition, due to the excess content of the mica-based powder is reduced in the content of other components to reduce the binding force.

Mica clay minerals were used in this example. Illite is a pale yellow, white, or black mica-based clay mineral with a three-layered scale-like structure and has a unique property of silkiness when released from water. Illite is known to be the main constituent of silicic acid, alumina, galley, iron and the like. Illite is used to absorb odors and toxic gases in adsorbed air of heavy metals and organic ions, to generate dissolved oxygen, to activate water molecules, to bacteriostatic, to emit far infrared rays, to release anions and toxins.

However, the present invention is not limited to illite as a mica-based clay mineral, and may be mixed with one or two or more selected from mica, earth mica, dolomite, gold mica, mica, germanium, vermiculite vermiculite, tourmaline.

In this case, the powder particle size of the mica-based clay mineral is preferably pulverized into 325 mesh. If the particles are larger than this, the particles are unevenly biased to ensure even binding.

In addition, the composition includes 10 to 15% by weight of vegetable extract reinforcement powder which is pulverized plants, such as corn crushed, chaff, wheat bran, sesame, reeds are mixed one or more. This reinforcing powder improves the compressive strength of the container as a reinforcing agent. When the vegetable extract reinforcement powder is contained in less than 10% by weight, the tensile and compressive strength is reduced, and when it exceeds 15% by weight, the compressive and tensile strength is increased while the starch content is reduced, resulting in poor moldability.

In addition, the composition contains 3 to 5% by weight of additives such as other humectants, fertilizers, water repellents, fixatives.

Production of a disposable container using such a composition is made as follows.

First, an appropriate amount of mica clay minerals is pulverized and powdered. In this case, the content of the mica-based powder may be determined in consideration of the weight of the container, the production cost, and the binding force with other components. Preferably the mica-based powder accounts for 5 to 10% by weight.

Next, the pulverized mineral powder is mixed with starch, pulverized cornstalks, rice hulls, wheat straws, vegetable extract reinforcement powders powdered, and soybeans, and additives such as humectants and fertilizers to obtain dough. At this time, the mixing means may be a stirrer.

Here, the vegetable extract reinforcement powder may further include natural plants such as reeds, silver grass, crests.

Then, the dough is pressed into the foam molding machine at a predetermined temperature and pressure. In this case, the foam molding machine includes a mold in a desired container shape. At this time, foaming temperature became 150 degreeC. The foaming pressure is kept constant during molding. Preferably, the foaming pressure is 130 to 170 kg / cm 3, and the temperature can be extruded under the conditions of 145 to 160 ° C.

When the foam molding of the dough is completed, the molded article is demolded to obtain a disposable container.

Here, in addition to compression molding, it may be produced by thermoforming or vacuum molding, which is a method of molding into a mold after passing through a heater zone, and injection molding by molding a dough into an mold in an injection machine.

The disposable container prepared in this way contains mica-based clay minerals such as illite, which emits far infrared rays and anions, and has a bacteriostatic effect of inhibiting the growth and reproduction of bacteria.

As described above, according to the present invention, there is provided a composition which promotes mechanical properties, biodegradability and economic efficiency of a biodegradable foam container, and provides a biodegradable natural container which is completely harmless to the human body having high biodegradability and non-environmental pollution upon disposal after use of the container.

Before landfill

Landfill one month
Landfill 2 months
Landfill 3 months

In addition, since the degradability in nature is also mineral mineral, as shown in Table 1 tested the degradability according to the landfill test of the container made of this composition, the reducibility that is degraded and reduced to the nature in the same period as the starch decomposition was superior to other containers.

Before culture

3 days of culture
6 days of culture
10 days of culture
14 days of incubation

In addition, the container made of this composition is a bacteriostatic action that inhibits the growth and reproduction of the bacteria as shown in Table 2 showing the biodegradability test table during the fungus culture, leading to a preservation period of about 7 days or more, leading to vegetables, fruits, animal products, etc. The freshness and shelf life were much higher than those of general stirrer containers and paper (pulp) containers.

Therefore, the present invention can be used as a composition for manufacturing a variety of food packaging containers such as round dish, rectangular dish, cup, bowl container, soup bowl and the like.

On the other hand, starch may further include a seafood extract of less than 10% by weight relative to the starch. Seafood spring water is produced by a known production method as a powder evaporated from seaweeds, such as wood starfish, detailed description thereof will be omitted. Seafood extract can increase the biodegradability of starch and adhesion as a binder.

In addition, starch may include soy flour in 10% by weight relative to the starch. Soy flour can increase fermentability and shorten the breakdown period. In addition, the vegetable extract reinforcement powder is not limited to the illustrated one, and may further include powder extracted from reeds, silver grass, crests and the like.

In addition, the vegetable extract reinforcement powder may further comprise burlap, ramie grass forming a fiber. These plants are fibrous to enhance the tensile strength of the container.

In addition, 20% by weight of the sodium alginate extracted from seaweed may be further included. Therefore, sodium alginate increases the adhesive strength of the starch to increase the compressive strength after molding.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be.

Claims (7)

60 to 70% by weight of starch mixed with one or more selected from potatoes, sweet potatoes, corn and the like;
5-10 wt% of mica-based powder powdered by one or more of illite, mica, earth mica, white mica, gold mica, mica, germanium, vermiculite vermiculite and tourmaline;
10-15% by weight of vegetable extract reinforcement powder powdered with plants such as cornstalks, rice hulls, wheat straws, sesame seeds, and reeds and mixed with one or more of them;
Composition using eco-friendly natural materials for the production of biodegradable disposable container, characterized in that the additives such as other moistening agents, fertilizers, water repellents, fixatives 3 to 5% by weight. The method of claim 1,
Starch is a composition using eco-friendly natural materials for the production of biodegradable disposable container, characterized in that the soy flour is contained in 10% by weight relative to the starch. The method of claim 1,
Vegetable extract reinforcement powder composition using eco-friendly natural materials for the production of biodegradable disposable container, characterized in that it further comprises powder extracted from reeds, silver grass, crests. The method of claim 1,
The material of the vegetable extract reinforcing powder composition using eco-friendly natural materials for the production of biodegradable disposable container, characterized in that hemp, ramie grass. The method of claim 1,
Sodium alginate extracted from seaweed is a composition using an eco-friendly natural material for the manufacture of a biodegradable disposable container, characterized in that 20% by weight is further included. The method of claim 1,
Starch is a composition using eco-friendly natural materials for the production of biodegradable disposable container, characterized in that the seaweed extract is further included in the starch 10% by weight or less. The method of claim 1,
Mica clay mineral is a composition using eco-friendly natural materials for the production of biodegradable disposable container, characterized in that the pulverized to the size of 325 mesh used.