KR101489655B1 - Antiinsect multilayer film for food packaging with sustained release property using environment―friendly low carbon biomass material - Google Patents

Abstract

The present invention relates to an environmentally friendly sustained-release multilayer insecticide film, and more particularly to a sustained-release insect repellent multilayer film using an environment-friendly bioplastic material, And can be used for the packaging of foods. The present invention can prepare a masterbatch for an insect repellent film using an insect repellent material impregnated with an insect repellent component and an olefinic resin as a base resin in the pores of the powdery porous herbaceous agricultural wastes,

Description

[0001] The present invention relates to a sustained-release multilayer insecticide film using food-packaging eco-friendly low-carbon biomass material,

The present invention relates to a sustained-release multilayer insecticide film using an environmentally friendly low-carbon biomass material, and more particularly, to a multilayer insecticidal film using an environmentally friendly low-carbon biomass material, The present invention relates to a sustained-release multilayer insecticide film and can be used for packaging of foods.

The purpose of food packaging is to protect the food from the external environment while maintaining the original state of the food while the manufactured food is circulated and delivered to the final consumer. Polyethylene (PE), polypropylene (PP), polyamide (PA), PET, etc. are mainly used for plastic film packaging commonly used in food packaging. However, due to the directional components generated by the contents of the food package, various insects and insects are approached to the package, and insects and worms approaching damage the film package and then enter the inside of the package to damage the contents, Causing many problems. Fig. 1 shows a photograph of a wrapper of a larva of a tiger moth larvae.

This problem has been solved by improving the gas-barrier property, thereby preventing the directional component of the food-containing material from escaping. On the other hand, a variety of schemes currently being proposed give insecticidal functions by prescribing natural insect repellent to the packaging material. When such an insecticide film is used, the insecticide present in the insecticide film prevents access to insects or insects and prevents damage to the product caused by such insects.

In general, when a repellent is applied to a polyolefin film, the insecticide contained in the film is released. However, since the insect repellent has poor compatibility with the polyolefin resin, it is difficult to disperse it in the film. In addition, insect repellent easily migrates to the surface even after the film is formed, and it is difficult to expect a continuous insect repellent effect. In order to solve the problem of dispersibility, a method of using insecticide master batch using porous plastic pellets has been proposed. However, since the porous plastic pellets are also plastic, there is no problem in dispersing insect repellent. There is a problem that it is difficult to expect a sufficient effect of insect proof against the input amount.

When the film is directly mixed with the plastic resin and insect repellent without using the above process, it is impossible to expect the loss of solid matter and stability of physical properties due to the heat generated during the molding. Also, the insect retardation effect is also caused by the layer separation between the polymers, There is a problem that the insect repellent can not be uniformly dispersed so that it produces a strong odor due to heat generated in the process of producing the film or the sensibility as a food packaging material is poor. On the other hand, the use of food packaging materials has increased rapidly over time, which is an environmental burden.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above problems, and it is an object of the present invention to improve the dispersibility of insect repellent components and to delay the migration of insect repellent components to the film surface. It is also an object of the present invention to improve the functionality by using a natural insect repellent material, to improve the decomposability of the packaging material, and to contribute to the environment. Further, the object of the present invention is to further improve the insect repellent function by forming the packaging film in multiple layers.

In the present invention, the insect repellent material is immersed and coated in an additional process in order to retard the surface migration rate of the insect repellent and to prevent the loss of the solid content volatilizing at high temperature, The insecticide masterbatch is adjusted to the purpose according to the use purpose and the insecticidal film is produced to improve the above problems.

To this end, the present invention provides a master batch for an insect repellent film, which comprises an insect repellent material impregnated with a repellent component in the pores of the powdery porous herbaceous agricultural waste. Wherein the masterbatch further comprises an olefin resin as a base resin. The insect repellent is preferably used in an amount of 50 to 150 parts by weight based on 100 parts by weight of the olefin resin, and 10 to 50 parts by weight of insect repellent is used in 100 parts by weight of the powdery porous herbaceous agricultural waste desirable.

The repellent component is preferably selected from the group consisting of cinnamon extract, peppermint extract, and lavender extract. Preferably, the insect repellent component is encapsulated by a microemulsion method and impregnated into the pores of the powdery porous herbaceous agricultural waste desirable. The antiparasitic porous body is preferably coated with a surface coating agent.

The present invention can produce an antifouling film using the above masterbatch for antifouling film. It is preferable that the film layer including the masterbatch for an insect repellent film has a multi-layer structure in the form of being inserted in the middle of the insect protective film. In addition, the antifouling film has a film layer formed of an outer layer, an intermediate layer, and an inner layer, the pores formed by porous inorganic or ultrafine micro-punching and having a ventilation function as an outer layer, And it can be a three-layered film formed of a polyolefin-based resin that can prevent being separated from food.

The insect repellent multi-layer film according to the present invention improves the dispersibility of the insect repellent component and maintains the insect repellent function for a long time by delaying the migration of the insect repellent component to the film surface. In addition, by using a natural insect repellent material, it improves the sensibility, improves the decomposability of the packaging material, and contributes to the environment.

Fig. 1 shows a photograph of a wrapping paper perforation of a larval moth larva.

The present invention uses porous herbaceous agricultural waste as a carrier of an insect repellent to improve the compatibility and dispersibility of a repellent with a plastic resin. This has the additional effect of utilizing waste resources and improving later biomass. Porous herbaceous agricultural wastes include grain husks, rice straw, cornstalks, barley stalks, and the like, and mixtures thereof can of course be used. The herbaceous agricultural wastes are lyophilized and then pulverized with a ball mill, followed by pulverization with an air jet mill to obtain a porous powder having a particle diameter of several micrometers.

Impregnant components are impregnated into the pores of the porous powder. The insect repellent component may be an oil component extracted from plants such as cinnamon, peppermint and lavender. However, the above-mentioned examples have excellent insecticidal effect against the larvae of the moth larvae. The insect repellent component may be generally impregnated in an amount of about 10 to 50 parts by weight based on 100 parts by weight of the porous powder, and there is a slight difference depending on the kind of herbaceous agricultural products. An insect repellent component is added to the porous powder of the herbaceous agricultural waste, and the repellent component is impregnated into the porous powder by high speed kneading. When impregnating the porous powder, it should be carried out at a lower temperature than the vaporization point of the insecticide component. Or an insect repellent may be diluted in a solvent and then loaded on a porous powder, and then the solvent may be removed.

Polyolefin-based plastic resin and herbaceous porous powder generally have poor mixing and compatibility when compounding, since the specific gravity of the porous powder is low and it is porous, so it does not rise easily even if it tries to raise the softening point of the olefin resin, Because it emits easily. However, there is an effect that the kneading and compatibility are improved by impregnating the insect repellent oil component. This is because the main properties of insect repellent are impregnated with vegetable oil, preventing moisture reabsorption and causing slip between the porous particles, facilitating dispersion among the polymers. This also improves the dispersibility of the insect repellent component. The masterbatch for an insect repellent film of the present invention (which may be in the form of a pelletized form obtained by blending or melting a porous powder impregnated with an insect repellent component and a resin) may be used again in combination with another resin, It would be more common to make insecticide films.

On the other hand, Cinnamomum cassia bark is a blue-arboreal bark of camphor tree and grows in southern China and Vietnam. Cinnamon refers to the bark of tree, the bark of the tree, the thick skin of the broiler, and the bark means that the thick skin of the old tree is dried and dried. Cinnamon contains 1 to 3.4% of essential oils such as cinnamaldehyde and cinnamyl aldehyde, 2 to 3% of tannin, mucilage and carbohydrates, and it is said that the oil content is high in trees grown for 5-6 years. Cinnamon has been used for a long time in various applications such as perspiration, antipyretic, analgesic and food flavor. It is also known that there is a preservative effect that promotes intestinal peristalsis and suppresses abnormal fermentation in the intestines, but the specific mechanism is not disclosed. In addition, cinnamon has been expected to have the effect of stimulating the immune function by being used as herbal medicines for people who are frail and depressed, but the exact mechanism is not known.

Peppermint is a perennial herb that has been used as a perennial herb with a perennial plant for monocotyledonous plants. It has been used as a food, medicinal and fragrance additive, an emollient and a bath additive since it is effective in relieving skin and mucous membranes, and being effective in antibacterial and pain relief. Peppermint oil removes toxin substances and is effective for dermatitis, vaccine, dry rash and pruritus. It expands the capillary blood vessels and exerts a cooling action, which is known to be effective for itching, inflammation and sunburn. Peppermint oil is also effective in softening skin and removing acne, and is known to be effective in mental fatigue, depression, and neurological seizures.

Lavendula (Lavendula angustifolia MILL) is a subshrub that grows about 60 cm in length, from Canary Island, which spans the Mediterranean Sea, to the Indian Peninsula. Especially, essential oils in aerial parts (mainly monoterpenes) as well as caffeic acid and depsides in leaves are known as main components. Essential oils prepared from lavender have traditionally been used for therapeutic purposes such as aromatherapy as well as cosmetics. Antibacterial, antifungal, spasmolytic, sedative and antidepressant effects of lavender oil are described.

The repellent component may be encapsulated using a microemulsion process and then impregnated into the porous powder. The reason for encapsulation is to delay the release of the insecticide component. The microemulsion method is often used to make nanoparticles by adding a surfactant to a solution to form a fine space and then causing polymerization in the solution. The surfactant components are hydrophilic on one side and hydrophobic groups on the other side, and they can be encapsulated by mixing them both in water and oil, forming micelles between themselves. Or the insect repellent component may be impregnated into the porous powder and then surface coated to delay the release of the repellent component. The surface coating agent may be selected from the group consisting of stearate, palmitate and laurate, and may be selected from the group consisting of stearate, palmitate and laurate. Preferably, calcium stearic acid, zinc stearic acid or a mixture thereof can be used. The surface coating agent is preferably used in an amount of 0.5 to 2 parts by weight based on 100 parts by weight of the porous powder. If the surface coating agent is used in an excessively small amount, sufficient coating can not be obtained. . Porous powder impregnated with insect repellent is called insect pouch.

[0004] On the other hand, methods of printing, coating, film production, etc., are put into the process of printing ink, microencapsulated coating agent, plastic masterbatch, etc. as a prescription method of pest-resistant material, have.

A master batch for an insect repellent film can be constituted by using a porous powder impregnated with a polyolefin resin and the insect repellent (insect pouch). 50 to 150 parts by weight of the parasitic porous body may be used based on 100 parts by weight of the polyolefin resin. The parasitic porous body itself can serve as a bioplastic. If the amount of the insect protective material used is too small, insecticidal effect may be insufficient. If the insect protective material is used in large amounts, the expression of the plastic film or pelletization may be difficult. It is, of course, possible to control the effectiveness of the insect repellent according to the degree of use of the insect repellent in the insect pouch. A compatibilizer for further improving the compatibility of these components, and the like may be additionally used. Examples of compatibilizers include glycidyl methacrylate, ethylene vinyl alcohol, polyvinyl alcohol, and ethylene vinyl acetate. In addition, an activator for plastic such as PE-wax or an ordinary oxidizing agent for decomposing plastics can be further added. Porous powder and polyolefin resin can be kneaded by using an extruder and pelletized to prepare an insect masterbatch. The olefin-based resin may be a resin used for producing a film such as polypropylene, polyethylene, or polyurethane. It is preferable to use the same resin as that used for the final film.

The film produced by using the masterbatch for antifouling film can be produced by various methods such as inflation method and T-die casting method, but it is preferable to employ a method of greatly reducing the lapping process by applying a top-down IPP coextrusion production method And the method of the film to be produced at this time is preferably formed as a multilayer film. It is preferable that the inner layer is an olefin PP or PE having a molecular weight of 500,000 or more and having a food stability stability. In addition, it is possible to smoothly transfer the insect-controlling component onto the surface by placing the layer having the insect-controlling component as an outer layer. Of course, it can be formed in two layers and may include various types of composite layers, which is within the technical scope of the present invention. It is further desirable to further include an aluminum deposition layer. In order to increase the effect of the insecticide, the outer layer of the multilayered film is formed by porous inorganic (calcium carbonate, talc, silica) or micro-micro punching to form pores to give a ventilating function. In the inner layer, Layer structure in which a layer containing an insect-repellent component impregnated into the pores of the porous material of the present invention is formed as an intermediate layer for the sake of sustained release.

The content of the masterbatch for an insect repellent film may be 1 to 20% by weight and more preferably 3 to 10% by weight in consideration of the overall physical properties with other resins used. If the thickness of the antifouling component-applying layer is too small, the antifouling effect may be insufficient. If the antifouling component-applied layer is formed thicker than necessary, the physical properties of the whole film may be deteriorated.

On the other hand, in the present invention, porous herbaceous agricultural wastes are used, and they are used as constituent elements of plastics, so that they are characterized in that the degradability is greatly improved.

Hereinafter, preferred embodiments of the present invention will be described in order to explain the present invention in more detail. The following Examples and Experiments are merely an embodiment of the present invention, and the film of the present invention and the production method thereof and their effects are not limited by the method described below, It is clear to those who have knowledge.

Example 1 Insecticidal Effect of Insect Repellent

In order to test the efficacy of the cinnamon, peppermint, and laeventer extracts of the present invention as insecticides against moth moth, the avoidance effect was tested using the open diffusion method. The repellent effect of the larvae moth larvae on the insecticide components was excellent. In addition, the insecticide was coated on the thin packaging material in the lid-covered Petri dish, 0.05g of the food was put into the mugwort moth test subject, and the packaging material was covered. Four third instar larvae were placed on the packaging material, -70%) for 7 days. As a control group, packaging materials without insecticide treatment were used. The perforation rate of untreated packaging materials was more than 95%, but the rate of perforation was significantly lowered to 30 to 40% for insect repellent packaging materials.

≪ Example 2 > Preparation of insect repellent article

The wheat husks were lyophilized at minus 2 ° C, and then pulverized three times with a ball mill, and then the 150-200 mesh passed powder was again pulverized with an air jet mill to obtain wheat husk powder. 20 parts by weight of lavender oil was added to 100 parts by weight of the wheat husk powder, followed by high-speed kneading at 400 to 600 rpm to impregnate the wheat husks into the pores. 2 parts by weight of calcium stearic acid was added, and the temperature was gradually elevated while high-speed kneading again to form an insect pouch.

≪ Example 3 > Preparation of Masterbatch for Insect Repellent Film

100 parts by weight of the low-density polyethylene (LDPE), 100 parts by weight of the insect repellent prepared in Example 2 and 5 parts by weight of ethylene vinyl alcohol were kneaded and pelletized using a twin-screw extruder to prepare a masterbatch for an insect repellent film.

Example 4 Preparation of Insectproof Film

The masterbatch obtained in Example 3 was kneaded in LDPE at 10% by weight, and a 60 탆 thick antifouling film was produced using a coextrusion film producing machine. The antifouling film was formed as an outer layer of a film layer including a master batch for an antifungal film, and the thickness of the layer containing the master batch for the antifungal film was about 7 μm.

Further, the outer layer and the inner layer were made of LDPE material with the layer containing the masterbatch for an insect repellent film as an intermediate layer, and the same weight% was prepared.

A single layer film of the same thickness of LDPE was prepared as a control.

≪ Example 5 > Insect proof test of insecticide film

Using the insecticide film prepared in Example 4, 10 birds of 3-week old moth larvae were placed under the film and examined for perforation for 7 days. The insect masterbatch was formed as the outer layer and the middle layer was formed as the outer layer. It was also tested using a control LDPE monolayer film. Ten sets of the above-described forms were prepared and tested. In the example of the present invention, the perforation was not made as a whole, and in the case of the control group, most of the perforations were made.

Claims (10)

The porous herbaceous agricultural wastes selected from the group consisting of rice straw, cornstalks, barley stands, wheat, and mixtures thereof are lyophilized, ground by a ball mill, passed through 150 to 200 mesh, and ground with an air jet mill. A masterbatch for an insect repellent film, characterized by comprising an insect pouch having a porous herbaceous agricultural waste pellet in powder form impregnated with 10 to 50 parts by weight of lavender oil as an insect repellent component and 2 parts by weight of a stearate as a surface coating agent . The method according to claim 1,
Wherein the master batch further comprises an olefin resin as a base resin. 3. The method of claim 2,
Characterized in that 50 to 150 parts by weight of the insect repellent is used per 100 parts by weight of the olefin resin. delete delete The method according to claim 1,
Characterized in that the insect repellent component is encapsulated by a microemulsion process and then impregnated into the pores of the powdered porous herbaceous agricultural waste. delete An insect-proofing film comprising a film layer comprising a masterbatch for an antifungal film according to any one of claims 1, 2, 3 and 6. 9. The method of claim 8,
Wherein the film layer including the masterbatch for an insect repellent film has a multi-layer structure in a state of being inserted in the middle of the insect protective film. 10. The method of claim 9,
The insecticide film is formed of an outer layer, an intermediate layer, and an inner layer, wherein the film layer is formed by pore formation through porous inorganic or ultrafine micro-punching and has a ventilation function as an outer layer, Wherein the three layers are formed of a polyolefin-based resin that can prevent odor from being broken out.

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