KR20230103049A - Rice packaging method of rice for controlling rice weevil and maintaining freshness - Google Patents

Abstract

The present invention relates to a rice packaging method, and more specifically to the rice packaging method for preventing an occurrence of rice bugs, maintaining freshness of rice, and allowing long-term storage. The present invention may include a step of preparing a coating composition containing rice bran, corn starch, brewer's waste, coffee waste, bay leaves, charcoal powder, ginkgo leaves, and antibacterial metal ions.

Description

Rice packaging method of rice for controlling rice weevil and maintaining freshness}

The present invention relates to a rice packaging method, and more particularly, to a rice packaging method capable of preserving the original taste of rice by preventing the occurrence of rice bugs and maintaining the freshness of polished rice.

When rice is exposed to a high temperature and high humidity environment, rice insects such as the rice weevil (Sitophilus oryzae), rice thief (Tenebroides mauritanicus), Chilo suppressalis, and Plodia interpunctella proliferate, which reduce the moisture content of rice. It induces the growth of fungi and bacteria and deteriorates the quality of rice. These rice bugs are easily identifiable with the naked eye, causing a psychological reluctance to the stored rice, which causes the rice to be discarded, which increases inventory storage and management costs and decreases the selling price of rice. In order to prevent the occurrence of these rice bugs, it is important to store rice under appropriate temperature and humidity conditions. However, if the rice is stored in too dry conditions, the moisture content of the rice itself may be excessively reduced and the taste of the rice may be deteriorated.

In general, when packaging grains such as rice or grains, vacuum packaging or oxygen absorbers are introduced to reduce the oxygen concentration inside the packaging material to prevent insects from growing, so that insects cannot grow. , or packaging in small quantities is being used. The vacuum packaging method is a method of storing the contents for a long period of time by putting the contents into a packaging bag made of vinyl, removing the air, and then sealing it. can be stored for a longer period of time compared to refrigerated storage. However, since a vacuum packaging machine is required to vacuum-pack grains, and the price of vacuum packaging materials is higher than that of general packaging materials, the issue of cost burden must be considered. In addition, when rice is stored for a long period of time in a vacuum packaging method, rice may deteriorate or rice bugs may occur due to environmental factors such as ambient temperature and humidity. In order to store rice in a fresh state for a long period of time, it is necessary to store the rice in a storage facility equipped with a temperature and humidity control device, which causes an increase in storage costs. On the other hand, packaging with an oxygen absorber helps to maintain freshness by preventing insects and eggs, but the function of the oxygen absorber deteriorates the moment it is exposed to the air. There is a problem with not sticking.

For the above reasons, there is a demand for a packaging method capable of preventing the occurrence of rice bugs and keeping rice fresh for a long time.

In order to solve the above problems, an object of the present invention is to provide a rice packaging method capable of maintaining rice insect control and freshness of rice for a long period of time.

In order to solve the above problems, the present invention 1) preparing a coating composition containing rice bran, corn starch, brewer's meal, coffee waste, bay leaves, charcoal powder, ginkgo leaves and antimicrobial metal ions; 2) coating the coating composition on one side or both sides of a rice packaging container; 3) putting rice into the rice packaging container; 4) filling the inside of the rice packaging container containing the rice with gas; and 5) sealing the rice packaging container filled with the gas.

The antibacterial metal ion is copper, silver, manganese or zinc ion, and the gas is characterized in that nitrogen or a mixture of nitrogen and carbon dioxide.

The method may further include mixing an oxygen absorber into the rice packaging container, and the oxygen absorber may be at least one selected from the group consisting of ascorbic acid, a salt thereof, an alkali compound, a reaction accelerator, and silica gel.

The coating composition includes 30 to 70 parts by weight of rice bran, 5 to 20 parts by weight of corn starch, 3 to 10 parts by weight of brewer's meal, 3 to 10 parts by weight of coffee grounds, 5 to 15 parts by weight of bay leaves, 3 to 8 parts by weight of charcoal powder, 5 to 15 parts by weight of ginkgo biloba and 1 to 15 parts by weight of antibacterial metal ions.

The rice packaging method according to the present invention prevents the occurrence of rice insects by coating a rice packaging container with a rice insect control coating composition, can keep polished rice fresh for a long period of time, and minimizes damage to rice during storage to maintain the flavor of rice for a long time. can

In addition, by using a coating composition composed of environmentally friendly components, it is not harmful to the human body, and rather, by utilizing discarded resources, it is economical and can contribute to environmental protection.

1 is an analysis of the rice beetle control effect according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail. The terms or words used in this specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventors can properly define the concept of terms in order to best explain their invention. Based on the principle, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention.

The rice packaging method according to the present invention includes the steps of 1) preparing a coating composition containing rice bran, corn starch, brewer's meal, coffee waste, bay leaves, charcoal powder, ginkgo leaves, and antibacterial metal ions; 2) coating the coating composition on one side or both sides of a rice packaging container; 3) putting rice into the rice packaging container; 4) filling the inside of the rice packaging container containing the rice with gas; and 5) sealing the rice packaging container filled with the gas.

The rice bran contains antioxidants, and as the mother of rice, the rice seeds separated from the ears are supplied with nutrients necessary for maintaining the life of rice until they sprout again the following year, as well as from climate change such as external temperature and humidity. It is very suitable for long-term storage of rice because the cell tissue is composed of the most suitable moisture absorption and release material for protection. The rice bran is preferably used in powder form.

The coffee waste is a by-product remaining after making coffee, and is often referred to as coffee grounds. About 15 g of coffee beans are used in a cup of Americano, of which 14.97 g, or 99.8%, becomes coffee grounds. Coffee waste is mostly landfilled or incinerated. When coffee waste is landfilled, methane (CH ₄ ), a greenhouse gas, is emitted, causing a greenhouse effect that is 34 times greater than that of carbon dioxide. However, coffee waste is an organic resource with high recycling value. It is rich in nitrogen, phosphoric acid, potassium, carbon, etc. necessary for plant growth, and is suitable for compost because it does not contain heavy metals. , it is known to be effective in promoting crop growth. In addition, it has been reported that coffee waste has a deodorizing effect and is effective in catching odors, and as a result of culturing useful microorganisms in coffee waste, it is effective in removing odor. In addition, it can be used as an air freshener because of the subtle coffee scent, and has a role as a natural insect repellent to chase insects and a humidity control function.

The corn starch is used as a binder, and since it is a natural starch, it does not undergo separate physical and chemical treatment, so the manufacturing process can be simplified and manufacturing costs can be reduced.

The brewer's spent-grain is a by-product produced during beer production, and is composed of husk pericarp and seed coat, which are rich in cellulose, hemicellulose, lipids, proteins, and the like. Brewer's grain has high nutritional value, such as containing a large amount of dietary fiber and essential amino acids, compared to its low price, so it has high value for use as livestock feed as well as food. Studies have shown that it is effective in suppressing it.

The bay leaf is a leaf of Laurus nobilis belonging to the Lauraceae laurel, is green, and has a strong fragrance and bitter taste in the case of dried leaves, and the undried raw leaves do not have a strong fragrance. As a natural insect repellent, bay leaves are known to be of great help in preventing the occurrence of rice bugs.

The charcoal powder is known to have excellent control effects as well as removal of inflammation or pain in the human body and sterilization. Rice bugs occur mainly in humid places. Charcoal has a humidity control and antibacterial effect, so it acts as a moisture absorber, so it can suppress the occurrence of rice bugs by creating an environment in which rice bugs cannot survive.

The ginkgo leaves contain a large amount of flavonoids and polyphenols such as rutin, catechin, and quercetin, and rice bugs have a characteristic of avoiding flavonoid components, so ginkgo leaves are known to have a control effect.

The antimicrobial metal ion may be copper, silver, manganese or zinc ion, but is not limited thereto. The antimicrobial metal ion imparts antimicrobial properties to the coating composition. Metal ions are known to have disinfection and sterilization effects of silver nitrate, sterilization effects of copper ions against viruses and algae, and antiseptic effects of zinc ions. Copper is a representative metal that has a bactericidal action. When copper comes into contact with bacteria, copper ions are absorbed into cells and destroy the shell of cell membranes. make it die In the same principle, copper ions destroy the protein shell of the virus and at the same time degrade the DNA/RNA of the virus.

The step 1) is a step of preparing a coating composition having a rice insect control and antibacterial function to be coated on a rice packaging container, and the coating composition is rice bran, corn starch, brewer's meal, coffee waste, bay leaf, charcoal powder, ginkgo leaf and antibacterial metal contains ions.

The coating composition is prepared by mixing water with rice bran, corn starch, brewer's meal, coffee waste, bay leaves, charcoal powder, ginkgo leaves, and antibacterial metal ions, and 30 to 70 parts by weight of rice bran, based on 100 parts by weight of the coating composition excluding water. , 5 to 20 parts by weight of corn starch, 3 to 10 parts by weight of brewer's meal, 3 to 10 parts by weight of coffee grounds, 5 to 15 parts by weight of bay leaves, 3 to 8 parts by weight of charcoal powder, 5 to 15 parts by weight of ginkgo leaves, and antimicrobial metal ions It is prepared by mixing 1 to 15 parts by weight.

The rice bran, brewer's waste, coffee waste, bay leaves, and ginkgo leaves are preferably mixed in powder form obtained by pulverization, and if the amount of corn starch used is too small, the adhesiveness may be lowered, which may be insufficient to serve as a binder.

Step 2) is a step of coating the coating composition on one side or both sides of the rice packaging container, and the coating composition is coated on the inside or outside or both inside and outside of the rice packaging container to prevent rice bugs from occurring and to maintain the freshness of the rice. function to enable long-term storage.

Step 3) is a step of packaging rice in the rice packaging container, and an appropriate amount of rice is put into the rice packaging container.

The step 4) is a step of filling the inside of the rice packaging container containing the rice, and the gas filled in the rice packaging container may be nitrogen or a mixture of nitrogen and carbon dioxide, thereby maintaining the quality of the rice and storing it. period may be extended. The mixing ratio of nitrogen and carbon dioxide may be mixed in a ratio of 50 to 90% nitrogen and 10 to 50% carbon dioxide, but is not limited thereto.

Step 5) is a step of sealing the rice packing container filled with the gas.

In addition, the present invention may further include mixing an oxygen absorbent into the rice packaging container. As the oxygen absorber, any oxygen absorber commonly used in the same technical field may be used. For example, ascorbic acid or its salts, sulfite, catechol, unsaturated hydrocarbons, nylon MXD6, cobalt salts, conjugated double bond polymers It may be a based oxygen absorber, a cyclohexane-containing polymeric oxygen absorber, an alkali compound, a reaction accelerator, or silica gel, but is not limited thereto. By mixing and packaging with an oxygen absorber, oxygen is removed to prevent deterioration of rice, mold or pests, oxidation and discoloration are prevented, and the taste and flavor of rice can be preserved and freshness can be maintained.

Any method known in the art can be used for the coating method of the coating composition, and for example, it can be coated on the surface of the rice packaging container by various methods such as deposition coating, immersion coating, spin coating, spray coating, and coating. .

Hereinafter, the present invention will be described through the following examples. However, the following examples are intended to specifically explain the present invention, and the scope of the present invention is not limited to the following examples.

<Preparation Example 1> Preparation of coating composition

Rice bran, brewer's meal, coffee waste, bay leaves and ginkgo leaves were pulverized to obtain pulverized products, and then 42 parts by weight of rice bran powder, 10 parts by weight of corn starch, 7 parts by weight of brewer's meal powder, 7 parts by weight of coffee ground powder, and 10 parts by weight of bay leaf powder , 5 parts by weight of charcoal powder, 10 parts by weight of ginkgo leaf powder, and 9 parts by weight of copper ions were mixed with water to prepare a coating composition.

<Example 1>

The coating composition prepared in Preparation Example 1 was applied to the inner surface of the rice packaging container and then dried.

<Example 2>

The coating composition prepared in Preparation Example 1 was applied to both sides of the rice packaging container and then dried.

<Experimental Example 1> Rice insect control experiment

In order to test rice insect control performance, rice packaging containers coated with the coating composition according to the present invention on the inner or both sides of the rice packaging containers (Examples 1 and 2) and uncoated rice packaging containers without any treatment (Comparative Example 1) After putting 200 g of rice in each, about 40 to 60 rice weevils were added. After leaving it for 30 days at 25 ± 5 ℃ and 70 ± 5% conditions, the survival rate of rice beetles was measured for a certain period. The survival rate (%) of rice beetles was calculated according to the following formula.

Survival rate (%) = (Number of surviving rice bugs/Total number of injected rice bugs) × 100

survival rate (%) 5 days elapsed 10 days elapsed 15 days elapsed 20 days passed 30 days passed Example 1 60 34 12 0 0 Example 2 52 21 0 0 0 Comparative Example 1 93 98 125 113 92

As a result, as shown in Table 1, in the case of Examples 1 and 2 coated with the coating composition of the present invention, it can be seen that the survival rate of rice beetles rapidly decreases over time. In the case of Example 2 coated on both sides, all the rice bugs were already killed by the time 15 days had elapsed, and in the case of Example 1 with the inner surface coated, all the rice bugs had died by the time 20 days had elapsed, steepening the survival rate of the rice bugs It was confirmed that the rice insect control effect was excellent by dropping it. On the other hand, in the case of Comparative Example 1, which is an untreated group, rice bugs tended to proliferate over time, and even after 30 days, the survival rate of rice bugs was very high at 92%. Accordingly, when the rice is packaged by coating the coating composition according to the present invention on the rice packaging container, it is possible to prevent the occurrence of rice bugs, to maintain the freshness of the rice for a long period of time, to facilitate the storage of the rice, and to enhance the flavor of the rice.

The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (6)

1) preparing a coating composition containing rice bran, corn starch, brewer's meal, coffee waste, bay leaves, charcoal powder, ginkgo leaves, and antimicrobial metal ions;
2) coating the coating composition on one side or both sides of a rice packaging container;
3) putting rice into the rice packaging container;
4) filling the inside of the rice packaging container containing the rice with gas; and
5) sealing the rice packaging container filled with the gas; rice packaging method including
The method of claim 1, wherein the antibacterial metal ion is copper, silver, manganese or zinc ion.
The method of claim 1, wherein the gas is nitrogen or a mixture of nitrogen and carbon dioxide.
The method of claim 1, further comprising the step of mixing an oxygen absorbent into the rice packaging container.
The oxygen absorber according to claim 4, wherein the oxygen absorber includes ascorbic acid or a salt thereof, sulfite, catechol, an unsaturated hydrocarbon, nylon MXD6, cobalt salt, a conjugated double bond polymeric oxygen absorber, a cyclohexane-containing polymeric oxygen absorber, or silica gel. Rice packaging method characterized in that
The method of claim 1, wherein the coating composition is 30 to 70 parts by weight of rice bran, 5 to 20 parts by weight of corn starch, 3 to 10 parts by weight of brewer's meal, 3 to 10 parts by weight of coffee waste, 5 to 15 parts by weight of bay leaf, charcoal powder Rice packaging method comprising 3 to 8 parts by weight, 5 to 15 parts by weight of ginkgo leaves and 1 to 15 parts by weight of antimicrobial metal ions

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