KR20220123795A - Bioplastic biodegradable composition and composite material manufacturing method including electrical insulation function - Google Patents

Abstract

The present invention relates to various inserts which are made of a synthetic resin material for electric insulation products, such as electric insulators and terminals, as parts installed on the inside and outside of an extra-high voltage power transformer to provide a high voltage current prevention function between parts and prevent rotation or separation thereof. In addition, the present invention relates to a biodegradable bioplastic composite material for extrusion and injection containing biodegradable polymer glass beads, wherein electrical insulation inserts made of a high-performance eco-friendly synthetic resin among various products are extruded into various molds and a molded product made of a new material synthetic fiber is provided to reduce environmental pollution of waste, which is a disadvantage of low-priced rubbers synthesized except for existing vulcanized fibers. The composite material manufacturing method comprises the steps of: preparing a base polyolefin-based resin; preparing powdery porous herbaceous biomass; preparing an impregnated mixture; and adding peroxide and glass beads to the impregnated mixture.

Description

Bioplastic biodegradable composition and composite material manufacturing method including electrical insulating function {omitted}

The present invention relates to a biodegradable bioplastic composite material for extrusion and injection containing synthetic resin materials for electrical insulation products such as electrical insulators or terminals, biodegradable polymers for general products, and glass beads, and a method for manufacturing the same.

As a product for electrical insulation, materials such as polyester and acrylic among synthetic fibers or synthetic fiber scraps have severe harmful effects such as dioxins during waste treatment. In terms of being used as a product, biomass material can be considered as an impurity of general resin. The more these impurities, the less the smoothness of the resin system, which is an important cause of non-injection molding, which also lowers productivity. Due to the fine dispersion between the mass and the resin, the pressure rises due to the lowering of the flow as well as the release separation between the mass and the resin, which causes gas generation and carbonization to become more severe. There is a problem that significantly lowers the value of the product.

In addition, according to Korean Patent Application Laid-Open No. 10-2011-0056037 or No. 10-2011-0134987, organic natural powders such as hemp, flax, jute, hemp, rice straw, wood flour, and rice husk, which are natural plant materials, are biodegradable and petroleum-based resins. It has been disclosed for a bio-composite material that is added and compounded to the product and then manufactured through an extrusion or injection process, but a bioplastic composition for extrusion and injection with improved lubrication has not been disclosed at all.

Therefore, instead of polymer materials that focus on functionalization, while minimizing environmental pollution such as nature protection, reduction of carbon dioxide generation, and recycling of resources, in general, bioplastics consider the environment, but because they are expensive, they are used as extrusion and injection materials related to household goods and electrical insulation products. There are limits to commercialization.

(KR) Patent Publication 10-2011-0056037 "Method for manufacturing composite material containing biodegradable polymer resin" (KR) Patent Publication 10-2011-0134987 "Method for manufacturing biodegradable bio-composite material"

An object of the present invention is to provide a biodegradable resin containing a biodegradable polymer composite material and having properties suitable for extrusion and injection molding at low cost, and a bioplastic composition for extrusion and injection comprising biomass and glass beads, and a method for manufacturing a composite material do.

The manufacturing method of the biodegradable composite material of the present invention for achieving the above object will be described in more detail as follows.

Based on 100 parts by weight of the base polyolefin modulus ratio as a raw material, a bioplastic composition comprising 35 to 140 parts by weight of a porous herbal biomass, and a bioplastic composite composition for extrusion and injection further comprising 1.2 to 42 parts by weight of glass beads provides The base polyolefin-based resin provides a bioplastic composition, characterized in that the polypropylene resin (PP), and provides a bioplastic composition further comprising the peroxide.

Preparing a porous herbal-based biomass on a powder; preparing a mixture by impregnating the base olefin-based resin and porous herbal-based biomass; It provides a method for producing a bioplastic composition for extrusion and injection, comprising the step of adding glass beads to the mixture.

In the above specific example, to provide a method for producing a bioplastic composition for extrusion and injection, characterized in that additional peroxide is added, and based on 100 parts by weight of the base polyolene resin, 35 to 140 parts by weight of a porous herbal biomass is prepared It provides a method for producing a bioplastic composition for extrusion and injection, characterized in that, and provides a method for producing a bioplastic composition for extrusion and injection, characterized in that 1.2 to 42 parts by weight of glass beads.

It means porous powder form by pulverizing porous herbaceous plants such as grain husks, rice straw, barley stalks or corn stalks. Since powdery porous herbal biomass is essentially a natural product, it contains moisture and gas and has a low specific gravity, so it is not easy to raise the softening point of other resins compounded together. When kneading with resin, the specific gravity is low, which causes the friction coefficient to be lowered. In order to improve this somewhat, in the present invention, a method of impregnating the pores with an inorganic filler to slightly increase the specific gravity and reducing the amount of gas generated during the extrusion process can be used. In addition, a surface coating agent may be used for the purpose of preventing reabsorption of moisture. Furthermore, in order to further improve the physical properties, a powdery red algae extract may be additionally included. Through this process, the physical properties of the porous herbal biomass can be somewhat improved. In the present invention, 6 to 22 parts by weight of an inorganic filler, 0.6 to 3.5 parts by weight of a surface coating agent, and 1.2 to 12 parts by weight of a powdery red algae extract can be used. Powdered porous herbal biomass, inorganic filler, surface coating agent, and powdery red algae extract are blended, and the pores are impregnated and coated with other materials by high-speed kneading. It is preferable to coat the powdery herbal biomass impregnated with inorganic fillers by heating from 80 to 100 degrees for 18 to 35 minutes during kneading.

In one embodiment of the present invention, the plastic material is widely used as various molded articles, packaging materials, industrial materials, consumer goods, etc. due to excellent physical properties, various functions, low prices, and the like. However, these products do not decompose naturally within an appropriate period, causing serious environmental pollution. Conventionally, methods such as landfill, incineration, and recycling have been taken as a method for treating such plastic waste, but due to each of these problems, degradable plastic that can be completely decomposed into water, carbon dioxide, methane gas, etc. within months to years Research is being conducted in various ways. Some developed countries have already reached a considerable level of practical use, such as obliging the use of biodegradable plastics. Degradable plastics are largely biodegradable plastics in which plastics are decomposed by microorganisms and enzymes, photodegradable plastics in which plastics are decomposed by destruction of molecular chain bonds by photochemical and thermal reactions by sunlight and radiant heat from sunlight, temperature, etc. It can be classified into oxidatively decomposed plastics in which plastics are decomposed by oxidation under the influence of

In one embodiment of the present invention, the lubricant for plastics prevents thermal decomposition by reducing frictional heat generated during proper mixing and extrusion and strengthening bonding or affinity between the blend containing herbal biomass and the synthetic resin, and at the same time to perform smooth extrusion operation. As a component to be added, even if these are added, the mechanical properties are maintained similar to those of the basic material, while providing smooth workability. As the lubricant, one or a mixture of two or more selected from the group consisting of stearate, palmitate and laurate, which are natural products with high environmental affinity, may be used. More preferably, calcium stearic acid, zinc stearic acid, or a mixture thereof may be used. If too little lubricant for plastic is used, the effect as a sufficient lubricant during molding is insufficient.

According to the present invention having the above characteristics, the biodegradable bioplastic composite composition for extrusion and injection is not only very economical, but also provides a material suitable for extrusion and injection molding, that is, a bioplastic composite composition with sufficient lubricity. Due to this, as well as biodegradability, it is possible to realize carbon reduction by generally reducing the amount of resin used and using porous herbaceous plants.

In addition, the insert molding for electrical insulation made of the synthetic resin of the present invention does not separate or rotate between transformer parts, and provides excellent effects as an overall functional improvement and eco-friendly raw material.

1 and 2 are one of the compositions of biomass resin of bioplastic, which is a composite material of extrusion and injection according to an embodiment of the present invention.

Hereinafter, the components and technical features of the present invention will be described in more detail through the following examples.

First, as the raw material composition required for the production of the present invention, the amount of the porous biomass and the PP resin used are the same, but the MI of the PP resin is 17, 23, 35, 48, respectively, and the Daejeo group 1 to 3, respectively, A PP resin-based pellet-type bioplastic composition containing mass was prepared, and the MI of the prepared bioplastic composition pellets was rapidly reduced to 3.5, 7.0, and 17, respectively, so in this state, extrusion and It was unsuitable for use as a resin for injection.

Analyzing the above mixed raw materials, it can be seen that when peroxide is added, the flowability of the plastic resin containing biomass is improved by about 3.5 to 5.5 times. The MI of the base resin of the raw material also affects the MI to some extent, but it seems that the amount of peroxide has more influence. A sufficient degree of MI may be achieved by adjusting the amount of peroxide as desired. In order to obtain the effect that no additional coating is required on the outer surface of the product after molding without additional input to increase the mixing power, the melting point of the mold release extruder is raised and the extraction process is carried out.

Existing products, when taken out, most of the products are round or rectangular rods with a full inside, and this type has a limitation in productivity due to a large mechanical pressure burden during extrusion. Because it is too heavy compared to that, it affects the installation work.

45 parts by weight of the porous biomass E of Example 1 based on 40 parts by weight of the polypropylene resin (Lotte Chemical Buller PP) is impregnated with 15 parts by weight of calcium carbonate having an average particle diameter in 45 parts by weight of a dried porous herbal agricultural by-product having an average particle diameter to prepare an impregnation mixture. 1.7 parts by weight of palm oil as a coating agent was added to the impregnation mixture to prepare an impregnation mixture coated with a surface, and 5, 7, 10, 17, 35 parts by weight of glass beads together with 0.4 parts by weight of maleic anhydride as a compatibilizer in the high-speed training impregnation mixture It was further added and used for manufacturing. The changes are shown in Table 1.

While the present invention has been described with reference to exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. you will know In addition, many modifications may be made to adapt the teachings of the present invention to a particular situation and material without departing from the essential scope thereof. Therefore, it should not be construed as being limited to the specific embodiment disclosed as the best mode contemplated for carrying out the present invention, but to include all embodiments falling within the scope of the appended claims.

20: glass bead 30: biomass + resin + glass bead
100: cylinder 200: bioplastic molding

Claims (1)

Preparing a base polyolefin-based resin;
Preparing 35 to 140 parts by weight of a powdery porous herbal biomass based on 100 parts by weight of the base polyolefin-based resin;
preparing an impregnation mixture by impregnating the base polyolefin resin and porous herbal biomass;
It comprises the step of adding 0.0002 to 10 parts by weight of peroxide and 1 to 40 parts by weight of glass beads based on 100 parts by weight of the base polyolefin-based resin to the impregnation mixture, wherein the lubricity of the plastic resin containing biomass is improved 4-6 times A method for manufacturing a bioplastic composite material for extrusion and injection, characterized in that.

Images