KR102846751B1 - Materials using biodegradable resins and food by-products and their manufacturing method - Google Patents

Abstract

The present invention relates to a biodegradable resin and a material utilizing food by-products and a method for manufacturing the same, characterized in that the biodegradable resin is obtained by heating and stirring a food by-product processed using at least one food by-product selected from among sikhye by-products and beer by-products, and a biodegradable resin processed using a biodegradable resin.

Description

Materials using biodegradable resins and food by-products and their manufacturing methods

The present invention relates to a packaging material utilizing biodegradable resin and food by-products and a method for manufacturing the same, and more specifically, to a packaging material utilizing biodegradable resin and food by-products and a method for manufacturing the same, which utilizes at least one food by-product selected from among sikhye by-products and beer by-products to reduce carbon emissions and manufacturing costs, as well as to have the effects of resource recycling and environmental pollution reduction through upcycling of discarded food by-products.

[Research and development projects supporting this invention]

[ Assignment ID ] D2121014

[ Buddha Name ] Gyeonggi Province

[Research Management Specialist Organization] Gyeonggi Province Economic and Science Promotion Agency

[Research Project Name] Corporate-led General

[Research Project Name] Development of biodegradable materials using food by-products and commercialization of post-plastic products utilizing these materials.

[Research Institution] Tecoplus Co., Ltd.

Research Period: August 1, 2021 - July 30, 2022

In general, cosmetic containers are experiencing a surge in demand in the industry due to their practicality, economy, and convenience. While the use of plastic containers for cosmetics and food packaging has been rapidly increasing, most packaging materials are plastic products made from synthetic resins, either injection-molded, extruded, or thermoformed.

While these plastic materials are convenient, they are also causing serious environmental pollution, including the leakage of endocrine disruptors from incineration or landfilling of large quantities of discarded plastic containers and food packaging, the detection of highly toxic dioxins, and air pollution caused by incomplete combustion of waste. Landfilling of waste plastics, which takes hundreds of years to decompose in nature, is considered a major cause of environmental pollution.

To address this serious environmental pollution problem, research and development on biodegradable plastics have been active recently. These plastics can be used like regular plastics, but when discarded, they are biodegraded by soil microorganisms and quickly recycle back into nature, blending with it and causing no environmental pollution. This environmentally friendly approach has become increasingly important. As pressure to prevent environmental pollution and protect nature intensifies worldwide, advanced countries such as Germany, Italy, and the United States are actively implementing biodegradable plastics, mandating the use of biodegradable resins in food packaging, shopping bags, and plastic containers.

The use of biodegradable plastic disposable containers and bags is increasing annually due to growing public awareness of cleanliness and government guidelines. However, this use still lags behind that of developed countries. Recently, active research into biodegradable plastics has led to the development of a growing number of biodegradable polymers that share similar physical properties and processing characteristics to conventional synthetic resins. Unlike conventional synthetic plastics, these polymers are readily broken down by natural microorganisms and recycled back into the environment after use, thus avoiding environmental pollution.

Currently, there are two main types of degradable plastics being developed: photodegradable plastics that decompose with light (mainly ultraviolet rays) and biodegradable plastics that decompose with microorganisms.

Looking at the biodegradable polymers developed so far, there are natural biodegradable polymers such as starch, cellulose, chitin, chitosan, natural rubber, pulp, etc., and in addition, there are PLA (Poly Lctic Acid), PHA (Poly hydroxy alkanoate), PBAT (Polybutylene Adipate Terephthalate), PBS (Poly (butylenes succinate), polybutylene succinate), or PPC (Poly Propylene Carbonate).

However, the problem is that most of the raw materials used in these biodegradable polymers are expensive, which increases the cost of the product and increases the burden on consumers when used in cosmetics containers or food containers.

To compensate for this, efforts are being made to lower the unit price by mixing in some natural ingredients, but so far, satisfactory results have not been achieved in terms of off-flavor or strength, and various studies are still being conducted to improve this.

Korean Patent Publication No. 10-2342537 (published on December 23, 2021), "Biodegradable PLA bottle with improved transparency, penetration resistance, and impact resistance and its manufacturing method."

In order to solve the above problems, the present invention relates to materials for containers, etc., and more specifically, to a biodegradable resin and a material utilizing food by-products and a method for manufacturing the same, characterized in that the biodegradable resin is obtained by heating and stirring a food by-product processed using at least one food by-product of sikhye by-product or beer by-product, and a biodegradable resin processed using a biodegradable resin.

In order to achieve the above purpose, the present invention provides a biodegradable resin and a material utilizing food by-products, characterized in that the biodegradable resin is obtained by heating and stirring a food by-product processed using at least one food by-product selected from among sikhye by-products and beer by-products, and a biodegradable resin processed using a biodegradable resin.

In addition, the biodegradable resin is characterized by being at least one of PLA, PHA, PBAT, PBS, or PPC.

In addition, the processed food by-product is characterized in that it is processed by removing sugar and cellulose from at least one of the sikhye by-product and the beer by-product.

In addition, the processed biodegradable resin is characterized by being processed by pulverizing the biodegradable resin and applying a crosslinking agent to improve flowability.

In addition, the present invention provides a method for manufacturing a material utilizing biodegradable resin and food by-products, characterized by including a food by-product processing step (S10) of manufacturing a processed food by-product using at least one food by-product selected from among sikhye by-products and beer by-products; a biodegradable resin processing step (S20) of manufacturing a processed biodegradable resin using a biodegradable resin; and a composite material manufacturing step (S30) of manufacturing a new composite material by heating, stirring, and drying the processed food by-product of the food by-product processing step (S10) and the processed biodegradable resin of the biodegradable resin processing step (S20).

The biodegradable resin and material utilizing food by-products manufactured according to the manufacturing method of the present invention relate to materials for containers, etc., and more specifically, the biodegradable resin is obtained by heating and stirring a food by-product processed using at least one food by-product among sikhye by-products and beer by-products, and a biodegradable resin processed using a biodegradable resin, so that not only can the manufacturing cost be reduced, but also the problem of off-flavor can be solved and the strength can be improved.

Figure 1 is a flow chart of a method for manufacturing a material using biodegradable resin and food by-product of the present invention.
Figure 2 is a flow chart of a specific manufacturing method of a material utilizing biodegradable resin and food by-product of the present invention.

The following detailed description of the present invention provides examples of embodiments in which the present invention may be practiced, and reference is made to the accompanying drawings, which illustrate examples of such embodiments. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention, while different from each other, are not necessarily mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the present invention. Furthermore, it should be understood that the positions or arrangements of individual components within each described embodiment may be changed without departing from the spirit and scope of the present invention.

Accordingly, the detailed description set forth below is not intended to be limiting, and the scope of the present invention is defined solely by the appended claims, along with the full scope equivalent to what such claims, if properly described, would encompass. Similar reference numerals in the drawings designate the same or similar features throughout.

The terms used in this invention have been selected from widely used, current terms, taking into account the functions of the invention. However, these terms may vary depending on the intentions of those skilled in the art, precedents, the emergence of new technologies, etc. Furthermore, in certain cases, terms may be arbitrarily selected by the applicant, in which case their meanings will be described in detail in the relevant description of the invention. Therefore, the terms used in this invention should not be defined simply as names, but rather based on their inherent meanings and the overall content of the invention.

When a part of the present invention is said to “include” a certain component, this does not mean that other components are excluded, but rather that other components may be included, unless otherwise specifically stated.

Hereinafter, a method for manufacturing a material using biodegradable resin and food by-product according to the present invention will be described.

The material utilizing biodegradable resin and food by-product according to the present invention is characterized in that it is obtained by heating and stirring a food by-product processed using at least one food by-product among sikhye by-product and beer by-product, and a biodegradable resin processed using a biodegradable resin.

The food by-product is preferably at least one of a sikhye by-product and a beer by-product. Accordingly, the food by-product may be a sikhye by-product. Furthermore, the food by-product may be a beer by-product. Alternatively, the food by-product may be a mixture of a sikhye by-product and a beer by-product.

When the above food by-product is a mixture of a sikhye by-product and a beer by-product, it is preferable that the sikhye by-product and the beer by-product be a mixture mixed in a weight ratio of 40 to 60:60 to 40.

The processed food by-product described above may be obtained, in more specific implementation, by removing sugar from the food by-product, removing cellulose from the food by-product, and pulverizing the food by-product.

The processed food by-product may be obtained by grinding and pulverizing a food by-product from which sugar and cellulose have been removed, wherein the sugar has been removed from at least one food by-product, such as a sikhye by-product or a beer by-product, by using a solvent to remove the sugar; and the cellulose of the food by-product from which sugar has been removed has been removed using a cellulose removal solution.

At this time, the solvent for removing the sugar of the food by-product may be any one solvent selected from the group consisting of water, anhydrous or hydrous alcohols of C1 to C4, ethyl acetate, glycerin, and ethylene glycol, and most preferably, alcohol will be appropriately used. Alcohol is preferred because it is inexpensive and is considered a safe substance according to the FDA, and is widely used for the separation of low molecular weight compounds. Meanwhile, the food by-product from which the sugar has been removed is preferably obtained by mixing at least one food by-product of Sikhye or beer by-product at a speed of 5 to 300 rpm while heating to a temperature of 30 to 100°C so that the sugar component contained in the food by-product is dissolved in the solvent, and the solvent in which the sugar component is dissolved is removed, and the remaining residue is obtained. The above process can be repeated 1 to 3 times, and by repeating the above process, the sugar can be easily removed from the food by-product, thereby improving the quality of the final product.

The food by-product from which the sugar and cellulose have been removed is preferably at least one solution selected from the group consisting of sulfuric acid, hydrochloric acid, sodium hydroxide, potassium hydroxide, ammonia, lithium hydroxide, calcium carbonate, potassium carbonate, sodium carbonate, potassium bicarbonate, and sodium bicarbonate, as an example of a cellulose removal solution that removes cellulose from the food by-product from which the sugar has been removed.

At this time, as an acidic solution among the cellulose removal solutions that remove cellulose from food by-products, sulfuric acid or hydrochloric acid may be used, and as an alkaline solution among the cellulose removal solutions that remove cellulose from food by-products, sodium hydroxide, potassium hydroxide, ammonia, lithium hydroxide, calcium carbonate, potassium carbonate, sodium carbonate, potassium bicarbonate or sodium bicarbonate may be used, or a mixture thereof may be used.

Meanwhile, the cellulose removal solution may be any one selected from the group consisting of 1-ethyl-3-methyl imidazolium, 1-butyl-3-methyl imidazolium, 1-ethyl-3-methyl imidazolium chloride, 1-ethyl imidazolium bromide, 1-ethyl-imidazolium chloride, and 1-butyl-3-methyl imidazolium acetate.

At this time, the food by-product from which the sugar and cellulose have been removed may be obtained by adding a cellulose removal solution to the food by-product from which the sugar has been removed and mixing at a speed of 5 to 300 rpm while heating at a temperature of 30 to 100°C.

Meanwhile, the food by-product from which the sugar and cellulose have been removed may be one in which the sugar and cellulose have been removed by adding an integrated solvent to at least one food by-product among sikhye by-products or beer by-products.

The above integrated solvent refers to a mixture of a solvent for extracting sugar and a cellulose removal solution for removing cellulose.

Specifically, the integrated solvent for obtaining the food by-product from which the sugar and cellulose have been removed may be a mixture of any one solvent selected from the group consisting of water, anhydrous or hydrous alcohols of C1 to C4, ethyl acetate, glycerin, and ethylene glycol, and any one or more solutions selected from the group consisting of sulfuric acid, hydrochloric acid, sodium hydroxide, potassium hydroxide, ammonia, lithium hydroxide, calcium carbonate, potassium carbonate, sodium carbonate, potassium bicarbonate, and sodium bicarbonate, 1-ethyl3-methyl imidazolium, 1-butyl-3-methyl imidazolium, 1-ethyl-3-methyl imidazolium chloride, 1-ethyl imidazolium bromide, 1-ethyl-imidazolium chloride, and 1-butyl-3-methyl imidazolium acetate. As a more specific example, the integrated solvent may be a mixed solvent of alcohol and hydrochloric acid solution in a weight ratio of 70:30 to 90:10.

The processed food by-product may be obtained by grinding and pulverizing a food by-product from which sugar and cellulose have been removed into particles of 15 to 50 μm. More specifically, the processed food by-product may be obtained by complex grinding a food by-product from which sugar and cellulose have been removed using a blade cutter mill or an ACM.

The processed food by-products described above may be obtained by grinding and pulverizing food by-products from which sugar and cellulose have been removed, at a rotation speed of 1000 to 15000 rpm, at a wind speed of 1 to 90 m/s for transporting the food by-products to a polarizer, and at a food by-product supply speed of 1 to 50 kg/hr, and by applying a double cyclone to increase polarization efficiency.

The processed food by-products mentioned above may be obtained using an ACM-Mill device. The ACM-Mill device is a device manufactured so that the sample fed into the device is first crushed through a narrow gap between the internal ultra-high-speed crushing blades and the external unevenness, and then the crushed sample is transported by the air flow of the blower, and coarse particles are transported back to the crushing zone by the internal separating blades, and only the finely crushed sample is captured by the cyclone along with the air transport.

More specifically, the processed food by-product may be a food by-product from which sugar and cellulose have been removed, which is supplied to a grinder at a rate of 1 to 50 kg/hr, is first ground with a grinding blade having a speed of 1,000 to 15,000 rpm, and the ground food by-product is transferred to a separating blade according to the air flow by a blower, and through the separating blade, coarse particles exceeding a preset diameter of 15 to 50 μm are transferred back to the grinding zone, and only unground samples having a preset diameter of 15 to 50 μm or less are transferred by air and captured by a cyclone.

The above biodegradable resin may include various biodegradable resins such as PLA (Poly Lctic Acid), PHA (Poly hydroxy alkanoate), PBAT (Polybutylene Adipate Terephthalate), PBS (Poly (butylenes succinate), or PPC (Poly Propylene Carbonate).

The above-mentioned processed biodegradable resin may be obtained by crushing one or more biodegradable resins of PLA, PHA, PBAT, PBS or PPC and improving flowability.

More specifically, the processed biodegradable resin may be one in which at least one biodegradable resin selected from PLA, PHA, PBAT, PBS or PPC is pulverized into particles of 15 to 50 μm at a rotation speed of 1000 to 15000 rpm, an air volume for transporting the biodegradable resin to the polarizer of 1 to 90 m/s, and a supply speed of the biodegradable resin of 1 to 50 kg/hr.

More specifically, the processed biodegradable resin may be obtained by pulverizing at least one biodegradable resin selected from PLA, PHA, PBAT, PBS, and PPC, applying at least one crosslinking agent selected from Di-(2,4-dichlorobenzoyl)-peroxide, Dibenzol peroxide, Dicumyl peroxide, Di-t-butylperoxide, t-butylcumylperoxide, and t-Butyl peroxybenzoate, and inducing an appropriate reaction to occur within the twin screw by utilizing the half-life of the crosslinking agent, thereby improving flowability.

The material utilizing the above biodegradable resin and food by-product is obtained by heating, stirring, and drying the processed food by-product and the processed biodegradable resin.

As a specific example, the material utilizing the biodegradable resin and food by-product may be obtained by placing processed food by-product and processed biodegradable resin in a weight ratio of 5:95 to 30:70 in a twin extruder and heating and stirring at a reaction temperature of 100 to 300°C and a screw rotation speed of 300 to 800 rpm.

In addition, the material utilizing the biodegradable resin and food by-product may be obtained by heating and stirring the processed food by-product and the processed biodegradable resin, and drying them at 60 to 90°C for 2 to 8 hours.

To summarize, the material utilizing biodegradable resin and food by-product according to the present invention is; At least one solution selected from the group consisting of sulfuric acid, hydrochloric acid, sodium hydroxide, potassium hydroxide, ammonia, lithium hydroxide, calcium carbonate, potassium carbonate, sodium carbonate, potassium bicarbonate, and sodium bicarbonate is added to crushed food by-products, thereby removing sugar, and at least one cellulose selected from the group consisting of 1-ethyl 3-methyl imidazolium, 1-butyl-3-methyl imidazolium, 1-ethyl-3-methyl imidazolium chloride, 1-ethyl imidazolium bromide, 1-ethyl-imidazolium chloride, and 1-butyl-3-methyl imidazolium acetate is removed, and the food by-products crushed according to the air flow by the blower are supplied to a crusher at a speed of 1 to 50 kg/hr, and the crushed food by-products are crushed by a separation blade. By transporting, through a separating blade, coarse particles exceeding a preset diameter of 15 to 50㎛ are transported back to the grinding zone, and only unpulverized samples having a preset diameter of 15 to 50㎛ or less are transported by air and collected by a cyclone to obtain processed food by-products; and biodegradable resin obtained by pulverizing into particles of 15 to 50㎛ at a rotation speed of 1000 to 15000 rpm, an air volume transporting the biodegradable resin to the polarizer of 1 to 90 m/s, and a supply speed of the biodegradable resin of 1 to 50 kg/hr, and applying one or more crosslinking agents selected from among Di-(2,4-dichlorobenzoyl)-peroxide, Dibenzol peroxide, Dicumyl peroxide, Di-t-butylperoxide, t-butylcumylperoxide, and t-Butyl peroxybenzoate; It can be obtained by heating and stirring at a reaction temperature of 00 to 300℃ and a screw rotation speed of 300 to 800 rpm in a weight ratio of 5:95 to 30:70.

Hereinafter, a method for manufacturing a composite material using a biodegradable resin and food by-product according to the present invention will be described.

Figure 1 is a flow chart for a method for manufacturing a material using a biodegradable resin and food by-product of the present invention, and Figure 2 is a flow chart for a specific method for manufacturing a material using a biodegradable resin and food by-product of the present invention.

The method for manufacturing a composite material using a biodegradable resin and a food by-product according to the present invention comprises a food by-product processing step (S10) of manufacturing a processed food by-product using at least one food by-product selected from among sikhye by-products and beer by-products; a biodegradable resin processing step (S20) of manufacturing a processed biodegradable resin using a biodegradable resin; and a composite material manufacturing step (S30) of manufacturing a composite material by heating, stirring, and drying the processed food by-product of the food by-product processing step (S10) and the processed biodegradable resin of the biodegradable resin processing step (S20).

First, the food by-product processing step (S10) is performed.

In the above food by-product processing step (S10), a processed food by-product is manufactured using at least one food by-product among sikhye by-products and beer by-products.

Accordingly, in the food by-product processing step (S10), the food by-product may be a sikhye by-product. Furthermore, in the food by-product processing step (S10), the food by-product may be a beer by-product. In the food by-product processing step (S10), the food by-product may be a mixture of a sikhye by-product and a beer by-product.

In the above food by-product processing step (S10), if the food by-product is a mixture of sikhye by-product and beer by-product, it is preferable that the sikhye by-product and beer by-product be a mixture mixed in a weight ratio of 40 to 60:60 to 40.

The above food by-product processing step (S10) may include, in more specific implementation, a food by-product sugar removal step (S12), a food by-product cellulose removal step (S14), and a food by-product pulverization step (S16).

In the above food by-product sugar removal step (S12), sugar from at least one food by-product among sikhye by-product and beer by-product is removed using a solvent to produce a food by-product from which sugar has been removed.

At this time, in the food by-product sugar removal step (S12), the sugar of the food by-product can be removed using any one solvent selected from the group consisting of water, anhydrous or hydrous alcohols of C1 to C4, ethyl acetate, glycerin, and ethylene glycol, and most preferably, alcohol will be appropriate to use. Alcohol is preferred because it is inexpensive and is considered a safe substance according to the FDA, and is widely used for the separation of low molecular weight compounds.

Meanwhile, in the food by-product sugar removal step (S12), it is preferable to heat to a temperature of 30 to 100°C and mix at a speed of 5 to 300 rpm to dissolve the sugar component contained in the food by-product in the solvent, remove the solvent in which the sugar component is dissolved, and obtain the remaining residue. The above process can be repeated 1 to 3 times, and by repeating the above process, sugar can be easily removed from the food by-product, thereby improving the quality of the final product.

In the above food by-product cellulose removal step (S14), the cellulose of the food by-product from which sugar has been removed, manufactured in the food by-product sugar removal step (S12), is removed using a cellulose removal solution, thereby manufacturing a food by-product from which sugar and cellulose have been removed.

In the above food by-product cellulose removal step (S14), an example of a cellulose removal solution for removing cellulose from a food by-product from which sugar has been removed is preferably at least one solution selected from the group consisting of sulfuric acid, hydrochloric acid, sodium hydroxide, potassium hydroxide, ammonia, lithium hydroxide, calcium carbonate, potassium carbonate, sodium carbonate, potassium bicarbonate, and sodium bicarbonate.

At this time, in the food by-product cellulose removal step (S14), sulfuric acid or hydrochloric acid may be used as an acidic solution among the cellulose removal solutions that remove cellulose of food by-products, and sodium hydroxide, potassium hydroxide, ammonia, lithium hydroxide, calcium carbonate, potassium carbonate, sodium carbonate, potassium bicarbonate or sodium bicarbonate may be used as a basic solution among the cellulose removal solutions that remove cellulose of food by-products, or a mixture thereof may be used.

Meanwhile, the cellulose removal solution may be any one selected from the group consisting of 1-ethyl-3-methyl imidazolium, 1-butyl-3-methyl imidazolium, 1-ethyl-3-methyl imidazolium chloride, 1-ethyl imidazolium bromide, 1-ethyl-imidazolium chloride, and 1-butyl-3-methyl imidazolium acetate.

At this time, the process of removing cellulose from the sugar-removed food by-product manufactured in the sugar removal step (S12) using a cellulose removal solution in the food by-product cellulose removal step (S14) may be performed by mixing at a speed of 5 to 300 rpm while heating to a temperature of 30 to 100°C.

Meanwhile, the food by-product sugar removal step (S12) and the food by-product cellulose removal step (S14) may be performed simultaneously. In this case, the process in which the food by-product sugar removal step (S12) and the food by-product cellulose removal step (S14) are performed simultaneously may be referred to as a food by-product pretreatment step (S15).

In the above food by-product preprocessing step (S15), a processed food by-product is manufactured by adding an integrated solvent to at least one food by-product among sikhye by-product and beer by-product.

The integrated solvent in the above food by-product pretreatment step (S15) refers to a mixture of a solvent for extracting sugar and a cellulose removal solution for removing cellulose.

Specifically, the integrated solvent in the food by-product pretreatment step (S15) may be a mixture of any one solvent selected from the group consisting of water, anhydrous or hydrous alcohols of C1 to C4, ethyl acetate, glycerin, and ethylene glycol, and any one or more solutions selected from the group consisting of sulfuric acid, hydrochloric acid, sodium hydroxide, potassium hydroxide, ammonia, lithium hydroxide, calcium carbonate, potassium carbonate, sodium carbonate, potassium bicarbonate, and sodium bicarbonate, 1-ethyl3-methyl imidazolium, 1-butyl-3-methyl imidazolium, 1-ethyl-3-methyl imidazolium chloride, 1-ethyl imidazolium bromide, 1-ethyl-imidazolium chloride, and 1-butyl-3-methyl imidazolium acetate.

As a specific example, the integrated solvent in the food by-product pretreatment step (S15) may be an integrated solvent mixed with alcohol and hydrochloric acid solution in a weight ratio of 70:30 to 90:10.

In the above food by-product pulverization step (S16), the food by-product from which sugar and cellulose have been removed, manufactured in the food by-product cellulose removal step (S14) or the food by-product preprocessing step (S15), is pulverized to manufacture a processed food by-product.

In the above food by-product pulverization step (S16), in order to improve the dispersibility of the food by-product, it is appropriate to pulverize the food by-product from which sugar and cellulose have been removed, manufactured in the food by-product cellulose removal step (S14) or the food by-product pretreatment step (S15), into particles of 15 to 50 μm. Meanwhile, it is preferable to use the food by-product from which sugar and cellulose have been removed in the food by-product pulverization step (S16) in a dried form.

The above food by-product pulverization step (S16) may be a composite pulverization process performed through a blade cutter mill process and an ACM process.

In the above food by-product pulverization step (S16), it is preferable to control the rotation speed of the pulverizer, the amount of air transported to the polarizer, and the supply speed of the raw material. As a more specific example, in the above food by-product pulverization step (S16), the rotation speed of the pulverizer is suitably 1000 to 15000 rpm, the amount of air transporting the food by-product to the polarizer is preferably 1 to 90 m/s, and the supply speed of the food by-product may be 1 to 50 kg/hr. The above food by-product pulverization step (S16) may be repeated 1 to 10 times, and a double cyclone may be applied to increase polarization efficiency.

In the above food by-product pulverization step (S16), an ACM-Mill device can be used. The ACM-Mill device is designed so that the sample fed into the device is first pulverized through the narrow gap between the internal ultra-high-speed pulverizing blades and the external unevenness, and then the pulverized sample is transported by the air flow of the blower, and the coarse particles are transported back to the pulverization zone by the internal separating blades, and only the pulverized sample is captured by the cyclone along with the air transport.

More specifically, in the food by-product pulverization step (S16), it is preferable that the food by-product from which sugar and cellulose have been removed is supplied to a pulverizer at a speed of 1 to 50 kg/hr, and is first pulverized with a pulverizing blade having a speed of 1000 to 15000 rpm, and the pulverized food by-product is transferred to a separating blade according to the air flow by the blower, and coarse particles exceeding a preset diameter of 15 to 50 ㎛ are transferred to the pulverizing zone again through the separating blade, and only the pulverized sample having a preset diameter of 15 to 50 ㎛ or less is transferred by air and captured by a cyclone.

Next, the biodegradable resin processing step (S20) is performed.

In the above biodegradable resin processing step (S20), processed biodegradable resin is manufactured using biodegradable resin.

The biodegradable resin in the above biodegradable resin processing step (S20) may include various resins such as PP, PE, PVC, PS, PET, ABS, PBT, etc., and it is particularly preferable to use polypropylene (PP).

The above biodegradable resin processing step (S20) may include, in more specific implementation, a biodegradable resin crushing step (S22) and a flowability improvement step (S24).

In the above biodegradable resin crushing step (S22), the biodegradable resin is crushed to produce crushed biodegradable resin.

In the above biodegradable resin crushing step (S22), waste plastic is crushed to facilitate processing. At this time, in the biodegradable resin crushing step (S22), it is appropriate for the biodegradable resin to be crushed into particles of 15 to 50 μm. In the biodegradable resin crushing step (S22), it is appropriate for the crusher to have a rotation speed of 1000 to 15000 rpm, and it is preferable that the air volume transporting the biodegradable resin to the polarizer is 1 to 90 m/s, and the supply speed of the biodegradable resin may be 1 to 50 kg/hr.

In the above flowability improvement step (S24), a cross-linking agent is applied to the pulverized biodegradable resin manufactured in the biodegradable resin pulverization step (S22), thereby manufacturing a processed biodegradable resin.

In the above flow improvement step (S24), it is preferable to use at least one crosslinking agent among Di-(2,4-dichlorobenzoyl)-peroxide, Dibenzol peroxide, Dicumyl peroxide, Di-t-butylperoxide, t-butylcumylperoxide, and t-Butyl peroxybenzoate to break the molecular chains within the pulverized biodegradable resin, and in the above flow improvement step (S24), it is important to utilize the half-life of the crosslinking agent to induce an appropriate reaction to occur within the twin screw.

Next, the composite material manufacturing step (S30) is performed.

In the above composite material manufacturing step (S30), the food by-product processed in the food by-product processing step (S10) and the biodegradable resin processed in the biodegradable resin processing step (S20) are heated, stirred, and dried to manufacture a composite material.

As a specific example, in the composite material manufacturing step (S30), processed food by-products and processed biodegradable resins are placed in a twin extruder at a weight ratio of 5:95 to 30:70, and heated and stirred at a reaction temperature of 100 to 300°C and a screw rotation speed of 300 to 800 rpm.

At this time, if the reaction temperature of the food by-product and the processed biodegradable resin in the composite material manufacturing step (S30) is less than 100°C, the processed food by-product and the processed biodegradable resin may not melt and the reaction may not proceed, and if it exceeds 300°C, carbonization may occur or the temperature may be too high, causing the resin to melt like water and making it impossible to form it into a pellet shape.

Meanwhile, the composite material reacted by heating and stirring in the composite material manufacturing step (S30) contains food by-products, and if exposed to moisture, it may hydrolyze, which may cause a deterioration in physical properties. Therefore, dehumidifying and drying are essential. Therefore, the composite material manufacturing step (S30) preferably includes a process of drying the composite material obtained by reacting the processed food by-products and the processed biodegradable resin at 60 to 90°C for 2 to 8 hours.

To summarize, the specific manufacturing method of the composite material using the biodegradable resin and food by-product of the present invention comprises: a food by-product sugar removal step (S12) of removing sugar from at least one food by-product of Sikhye by-product or beer by-product using a solvent to manufacture a food by-product from which sugar has been removed; a food by-product cellulose removal step (S14) of removing cellulose from the food by-product from which sugar has been removed, manufactured in the food by-product sugar removal step (S12), using a cellulose removal solution to manufacture a food by-product from which sugar and cellulose have been removed; a food by-product pulverization step (S16) of manufacturing a processed food by-product by pulverizing the food by-product from which sugar and cellulose have been removed, manufactured in the food by-product cellulose removal step (S14); a biodegradable resin pulverization step (S22) of pulverizing a biodegradable resin to manufacture a pulverized biodegradable resin; The method includes a flow improvement step (S24) of applying a cross-linking agent to the pulverized biodegradable resin produced in the biodegradable resin pulverization step (S22) to produce a processed biodegradable resin; and a composite material production step (S30) of heating and stirring and drying the processed food byproduct of the food byproduct pulverization step (S16) and the processed biodegradable resin of the flow improvement step (S24) to produce a composite material.

Example 1 to 5. Manufacturing of materials using food by-products mixed with sikhye by-products and beer by-products

According to the following manufacturing method, composite materials of Examples 1 to 5 were manufactured.

Food by-product sugar removal step (S12): Food by-products, which were a mixture of Sikhye by-products and beer by-products in a weight ratio of 50:50, were heated to 70°C using alcohol as a solvent and stirred at a speed of 150 rpm to dissolve the sugar component in the solvent. The solvent in which the sugar component was dissolved was removed, and the remaining residue was obtained to produce food by-products from which sugar was removed. The above process was repeated three times.

Food by-product cellulose removal step (S14): A hydrochloric acid solution was added to the food by-product from which sugar was removed, manufactured in the food by-product sugar removal step (S12), and stirred at a speed of 150 rpm while heating to a temperature of 70°C, and the hydrochloric acid solution in which cellulose was dissolved was removed, thereby manufacturing a food by-product from which sugar and cellulose were removed.

Food by-product pulverization step (S16): The food by-product from which sugar and cellulose have been removed, manufactured in the food by-product cellulose removal step (S14), is supplied to a pulverizer at a speed of 30 kg/hr, and is first pulverized with a pulverizing blade having a speed of 5000 rpm, and the pulverized food by-product is transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30㎛ are transferred back to the pulverizing zone, and only the pulverized particles of 30㎛ or less are transferred by air and collected by a cyclone to manufacture a processed food by-product.

Biodegradable resin crushing step (S22): Processed biodegradable resins were manufactured using PLA (Example 1), PHA (Example 2), PBAT (Example 3), PBS (Example 4), and PPC (Example 5), respectively. PLA (Example 1), PHA (Example 2), PBAT (Example 3), PBS (Example 4), and PPC (Example 5) were supplied to a grinding machine at a rate of 30 kg/hr, and first crushed with a grinding blade having a speed of 5000 rpm, and the crushed PLA (Example 1), PHA (Example 2), PBAT (Example 3), PBS (Example 4), and PPC (Example 5) were transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30 ㎛ were transferred back to the crushing zone, and only unpulverized particles of 30 ㎛ or less were transferred by air and collected by a cyclone to produce a crushed biodegradable resin.

Flowability improvement step (S24): Di-(2,4-dichlorobenzoyl)-peroxide was applied to the pulverized biodegradable resin manufactured in the biodegradable resin pulverization step (S22), thereby manufacturing a processed biodegradable resin.

Composite material manufacturing step (S30): The processed food by-product manufactured in the food by-product cellulose removal step (S14) and the processed biodegradable resin manufactured in the flowability improvement step (S24) were placed in a twin extruder at a weight ratio of 10:90, heated and stirred at a reaction temperature of 200°C and a screw rotation speed of 500 rpm to manufacture a composite material in the form of pellets, and dried in a dehumidifying dryer at 80°C for more than 4 hours.

Example 6 to 10. Manufacturing of materials using sikhye by-products

According to the following manufacturing method, composite materials of Examples 6 to 10 were manufactured.

Food by-product sugar removal step (S12): Sikhye by-product was heated to 70°C using alcohol as a solvent and stirred at a speed of 150 rpm to dissolve the sugar component in the solvent. The solvent containing the dissolved sugar component was removed, and the remaining residue was collected to produce a food by-product with the sugar removed. The above process was repeated three times.

Food by-product cellulose removal step (S14): A hydrochloric acid solution was added to the food by-product from which sugar was removed, manufactured in the food by-product sugar removal step (S12), and stirred at a speed of 150 rpm while heating to a temperature of 70°C, and the hydrochloric acid solution in which cellulose was dissolved was removed, thereby manufacturing a food by-product from which sugar and cellulose were removed.

Food by-product pulverization step (S16): The food by-product from which sugar and cellulose have been removed, manufactured in the food by-product cellulose removal step (S14), is supplied to a pulverizer at a speed of 30 kg/hr, and is first pulverized with a pulverizing blade having a speed of 5000 rpm, and the pulverized food by-product is transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30㎛ are transferred back to the pulverizing zone, and only the pulverized particles of 30㎛ or less are transferred by air and collected by a cyclone to manufacture a processed food by-product.

Biodegradable resin crushing step (S22): Processed biodegradable resins were manufactured using PLA (Example 6), PHA (Example 7), PBAT (Example 8), PBS (Example 9), and PPC (Example 10), respectively. PLA (Example 6), PHA (Example 7), PBAT (Example 8), PBS (Example 9), and PPC (Example 10) were supplied to a grinding machine at a rate of 30 kg/hr, and first crushed with a grinding blade having a speed of 5000 rpm, and the crushed PLA (Example 6), PHA (Example 7), PBAT (Example 8), PBS (Example 9), and PPC (Example 10) were transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30 ㎛ were transferred back to the crushing zone, and only unpulverized particles of 30 ㎛ or less were transferred by air and collected by a cyclone to produce a crushed biodegradable resin.

Flowability improvement step (S24): Di-(2,4-dichlorobenzoyl)-peroxide was applied to the pulverized biodegradable resin manufactured in the biodegradable resin pulverization step (S22), thereby manufacturing a processed biodegradable resin.

Composite material manufacturing step (S30): The processed food by-product manufactured in the food by-product cellulose removal step (S14) and the processed biodegradable resin manufactured in the flowability improvement step (S24) were placed in a twin extruder at a weight ratio of 10:90, heated and stirred at a reaction temperature of 200°C and a screw rotation speed of 500 rpm to react and mold the composite material into a pellet form, and dried in a dehumidifying dryer at 80°C for more than 4 hours.

Example 11 to 15. Manufacturing of materials using beer by-products

According to the following manufacturing method, composite materials of Examples 11 to 15 were manufactured.

Food by-product sugar removal step (S12): Beer by-product was heated to 70°C using alcohol as a solvent and stirred at a speed of 150 rpm to dissolve the sugar component in the solvent. The solvent containing the dissolved sugar component was removed, and the remaining residue was obtained to produce a food by-product with the sugar removed. The above process was repeated three times.

Food by-product cellulose removal step (S14): A hydrochloric acid solution was added to the food by-product from which sugar was removed, manufactured in the food by-product sugar removal step (S12), and stirred at a speed of 150 rpm while heating to a temperature of 70°C, and the hydrochloric acid solution in which cellulose was dissolved was removed, thereby manufacturing a food by-product from which sugar and cellulose were removed.

Food by-product pulverization step (S16): The food by-product from which sugar and cellulose have been removed, manufactured in the food by-product cellulose removal step (S14), is supplied to a pulverizer at a speed of 30 kg/hr, and is first pulverized with a pulverizing blade having a speed of 5000 rpm, and the pulverized food by-product is transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30㎛ are transferred back to the pulverizing zone, and only the pulverized particles of 30㎛ or less are transferred by air and collected by a cyclone to manufacture a processed food by-product.

Biodegradable resin crushing step (S22): Processed biodegradable resins were manufactured using PLA (Example 11), PHA (Example 12), PBAT (Example 13), PBS (Example 14), and PPC (Example 15), respectively. PLA (Example 11), PHA (Example 12), PBAT (Example 13), PBS (Example 14), and PPC (Example 15) were supplied to a grinding machine at a rate of 30 kg/hr, and first crushed with a grinding blade having a speed of 5000 rpm, and the crushed PLA (Example 11), PHA (Example 12), PBAT (Example 13), PBS (Example 14), and PPC (Example 15) were transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30 ㎛ were transferred back to the crushing zone, and only unpulverized particles of 30 ㎛ or less were transferred by air and collected by a cyclone to produce a crushed biodegradable resin.

Flowability improvement step (S24): Di-(2,4-dichlorobenzoyl)-peroxide was applied to the pulverized biodegradable resin manufactured in the biodegradable resin pulverization step (S22), thereby manufacturing a processed biodegradable resin.

Composite material manufacturing step (S30): The processed food by-product manufactured in the food by-product cellulose removal step (S14) and the processed biodegradable resin manufactured in the flowability improvement step (S24) were placed in a twin extruder at a weight ratio of 10:90, heated and stirred at a reaction temperature of 200°C and a screw rotation speed of 500 rpm to react and mold the composite material into a pellet form, and dried in a dehumidifying dryer at 80°C for more than 4 hours.

The above examples 1 to 15 are summarized in Table 1 below.

Applied food by-products Applied biodegradable resin Step (S12)
Applicability Step (S14)
Applicability Example 1 Sikhyebak + beerbak PLA ○ ○ Example 2 Sikhyebak + beerbak PHA ○ ○ Example 3 Sikhyebak + beerbak PBAT ○ ○ Example 4 Sikhyebak + beerbak PBS ○ ○ Example 5 Sikhyebak + beerbak PPC ○ ○ Example 6 Sikhyebak PLA ○ ○ Example 7 Sikhyebak PHA ○ ○ Example 8 Sikhyebak PBAT ○ ○ Example 9 Sikhyebak PBS ○ ○ Example 10 Sikhyebak PPC ○ ○ Example 11 beer gourd PLA ○ ○ Example 12 beer gourd PHA ○ ○ Example 13 beer gourd PBAT ○ ○ Example 14 beer gourd PBS ○ ○ Example 15 beer gourd PPC ○ ○

Comparative example 1 to 5. Manufacturing of materials using food by-products mixed with sikhye by-products and beer by-products, omitting steps (S12)

According to the following manufacturing method, composite materials of Comparative Examples 1 to 5 were manufactured.

Food by-product cellulose removal step (S14): A hydrochloric acid solution was added to the food by-product, which was a mixture of Sikhye by-product and beer by-product in a weight ratio of 50:50, and stirred at a speed of 150 rpm while heating to a temperature of 70℃, and the hydrochloric acid solution in which cellulose was dissolved was removed, thereby producing a food by-product from which sugar and cellulose were removed.

Food by-product pulverization step (S16): The food by-product from which sugar and cellulose have been removed, manufactured in the food by-product cellulose removal step (S14), is supplied to a pulverizer at a speed of 30 kg/hr, and is first pulverized with a pulverizing blade having a speed of 5000 rpm, and the pulverized food by-product is transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30㎛ are transferred back to the pulverizing zone, and only the pulverized particles of 30㎛ or less are transferred by air and collected by a cyclone to manufacture a processed food by-product.

Biodegradable resin crushing step (S22): Processed biodegradable resins were manufactured using PLA (Example 1), PHA (Example 2), PBAT (Example 3), PBS (Example 4), and PPC (Example 5), respectively. PLA (Example 1), PHA (Example 2), PBAT (Example 3), PBS (Example 4), and PPC (Example 5) were supplied to a grinding machine at a rate of 30 kg/hr, and first crushed with a grinding blade having a speed of 5000 rpm, and the crushed PLA (Example 1), PHA (Example 2), PBAT (Example 3), PBS (Example 4), and PPC (Example 5) were transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30 ㎛ were transferred back to the crushing zone, and only unpulverized particles of 30 ㎛ or less were transferred by air and collected by a cyclone to produce a crushed biodegradable resin.

Flowability improvement step (S24): Di-(2,4-dichlorobenzoyl)-peroxide was applied to the pulverized biodegradable resin manufactured in the biodegradable resin pulverization step (S22), thereby manufacturing a processed biodegradable resin.

Composite material manufacturing step (S30): The processed food by-product manufactured in the food by-product cellulose removal step (S14) and the processed biodegradable resin manufactured in the flowability improvement step (S24) were placed in a twin extruder at a weight ratio of 10:90, heated and stirred at a reaction temperature of 200°C and a screw rotation speed of 500 rpm to react and mold the composite material into a pellet form, and dried in a dehumidifying dryer at 80°C for more than 4 hours.

Comparative example Manufacturing of materials using sikhye by-products, omitting steps 6 to 10 (S12)

According to the following manufacturing method, composite materials of Comparative Examples 6 to 10 were manufactured.

Food by-product cellulose removal step (S14): A hydrochloric acid solution was added to the Sikhye by-product, heated to a temperature of 70℃, and stirred at a speed of 150 rpm. The hydrochloric acid solution in which cellulose was dissolved was removed, thereby producing a food by-product from which sugar and cellulose were removed.

Food by-product pulverization step (S16): The food by-product from which sugar and cellulose have been removed, manufactured in the food by-product cellulose removal step (S14), is supplied to a pulverizer at a speed of 30 kg/hr, and is first pulverized with a pulverizing blade having a speed of 5000 rpm, and the pulverized food by-product is transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30㎛ are transferred back to the pulverizing zone, and only the pulverized particles of 30㎛ or less are transferred by air and collected by a cyclone to manufacture a processed food by-product.

Biodegradable resin crushing step (S22): Processed biodegradable resins were manufactured using PLA (Comparative Example 6), PHA (Comparative Example 7), PBAT (Comparative Example 8), PBS (Comparative Example 9), and PPC (Comparative Example 10), respectively. PLA (Comparative Example 6), PHA (Comparative Example 7), PBAT (Comparative Example 8), PBS (Comparative Example 9), and PPC (Comparative Example 10) were supplied to a grinding machine at a rate of 30 kg/hr, and first crushed with a grinding blade having a speed of 5000 rpm, and the crushed PLA (Comparative Example 6), PHA (Comparative Example 7), PBAT (Comparative Example 8), PBS (Comparative Example 9), and PPC (Comparative Example 10) were transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30 ㎛ were transferred back to the crushing zone, and only unpulverized particles of 30 ㎛ or less were transferred by air and collected by a cyclone to manufacture a crushed biodegradable resin.

Flowability improvement step (S24): Di-(2,4-dichlorobenzoyl)-peroxide was applied to the pulverized biodegradable resin manufactured in the biodegradable resin pulverization step (S22), thereby manufacturing a processed biodegradable resin.

Composite material manufacturing step (S30): The processed food by-product manufactured in the food by-product cellulose removal step (S14) and the processed biodegradable resin manufactured in the flowability improvement step (S24) were placed in a twin extruder at a weight ratio of 10:90, heated and stirred at a reaction temperature of 200°C and a screw rotation speed of 500 rpm to react and mold the composite material into a pellet form, and dried in a dehumidifying dryer at 80°C for more than 4 hours.

Comparative example Manufacturing of materials using beer by-products, omitting steps 11 to 15 (S12)

According to the following manufacturing method, composite materials of Comparative Examples 11 to 15 were manufactured.

Food by-product cellulose removal step (S14): Hydrochloric acid aqueous solution was added to beer by-product, heated to a temperature of 70℃, stirred at a speed of 150 rpm, and the hydrochloric acid aqueous solution in which cellulose was dissolved was removed, thereby producing a food by-product from which sugar and cellulose were removed.

Food by-product pulverization step (S16): The food by-product from which sugar and cellulose have been removed, manufactured in the food by-product cellulose removal step (S14), is supplied to a pulverizer at a speed of 30 kg/hr, and is first pulverized with a pulverizing blade having a speed of 5000 rpm, and the pulverized food by-product is transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30㎛ are transferred back to the pulverizing zone, and only the pulverized particles of 30㎛ or less are transferred by air and collected by a cyclone to manufacture a processed food by-product.

Biodegradable resin crushing step (S22): Processed biodegradable resins were manufactured using PLA (Comparative Example 11), PHA (Comparative Example 12), PBAT (Comparative Example 13), PBS (Comparative Example 14), and PPC (Comparative Example 15), respectively. PLA (Comparative Example 11), PHA (Comparative Example 12), PBAT (Comparative Example 13), PBS (Comparative Example 14), and PPC (Comparative Example 15) were supplied to a grinding machine at a rate of 30 kg/hr, and first crushed with a grinding blade having a speed of 5000 rpm, and the crushed PLA (Comparative Example 11), PHA (Comparative Example 12), PBAT (Comparative Example 13), PBS (Comparative Example 14), and PPC (Comparative Example 15) were transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30 ㎛ were transferred back to the crushing zone, and only unpulverized particles of 30 ㎛ or less were transferred by air and collected by a cyclone to manufacture a crushed biodegradable resin.

Flowability improvement step (S24): Di-(2,4-dichlorobenzoyl)-peroxide was applied to the pulverized biodegradable resin manufactured in the biodegradable resin pulverization step (S22), thereby manufacturing a processed biodegradable resin.

Composite material manufacturing step (S30): The processed food by-product manufactured in the food by-product cellulose removal step (S14) and the processed biodegradable resin manufactured in the flowability improvement step (S24) were placed in a twin extruder at a weight ratio of 10:90, heated and stirred at a reaction temperature of 200°C and a screw rotation speed of 500 rpm to react and mold the composite material into a pellet form, and dried in a dehumidifying dryer at 80°C for more than 4 hours.

The summary of the above comparative examples 1 to 15 is as shown in Table 2 below.

Applied food by-products Applied biodegradable resin Step (S12)
Applicability Step (S14)
Applicability Comparative Example 1 Sikhyebak + beerbak PLA × ○ Comparative Example 2 Sikhyebak + beerbak PHA × ○ Comparative Example 3 Sikhyebak + beerbak PBAT × ○ Comparative Example 4 Sikhyebak + beerbak PBS × ○ Comparative Example 5 Sikhyebak + beerbak PPC × ○ Comparative Example 6 Sikhyebak PLA × ○ Comparative Example 7 Sikhyebak PHA × ○ Comparative Example 8 Sikhyebak PBAT × ○ Comparative Example 9 Sikhyebak PBS × ○ Comparative Example 10 Sikhyebak PPC × ○ Comparative Example 11 beer gourd PLA × ○ Comparative Example 12 beer gourd PHA × ○ Comparative Example 13 beer gourd PBAT × ○ Comparative Example 14 beer gourd PBS × ○ Comparative Example 15 beer gourd PPC × ○

Comparative example 16 to 20. Manufacturing of materials using food by-products mixed with sikhye by-products and beer by-products.

According to the following manufacturing method, composite materials of Comparative Examples 16 to 20 were manufactured.

Food by-product sugar removal step (S12): Food by-products, which were a mixture of Sikhye by-products and beer by-products in a weight ratio of 50:50, were heated to 70°C using alcohol as a solvent and stirred at a speed of 150 rpm to dissolve the sugar component in the solvent. The solvent in which the sugar component was dissolved was removed, and the remaining residue was obtained to produce food by-products from which sugar was removed. The above process was repeated three times.

Food by-product pulverization step (S16): The food by-product from which sugar has been removed, manufactured in the food by-product sugar removal step (S12), is supplied to a pulverizer at a speed of 30 kg/hr, and is first pulverized with a pulverizing blade having a speed of 5000 rpm, and the pulverized food by-product is transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30㎛ are transferred back to the pulverizing zone, and only the pulverized particles of 30㎛ or less are transferred by air and collected by a cyclone to manufacture processed food by-products.

Biodegradable resin crushing step (S22): Processed biodegradable resins were manufactured using PLA (Example 1), PHA (Example 2), PBAT (Example 3), PBS (Example 4), and PPC (Example 5), respectively. PLA (Example 1), PHA (Example 2), PBAT (Example 3), PBS (Example 4), and PPC (Example 5) were supplied to a grinding machine at a rate of 30 kg/hr, and first crushed with a grinding blade having a speed of 5000 rpm, and the crushed PLA (Example 1), PHA (Example 2), PBAT (Example 3), PBS (Example 4), and PPC (Example 5) were transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30 ㎛ were transferred back to the crushing zone, and only unpulverized particles of 30 ㎛ or less were transferred by air and collected by a cyclone to produce a crushed biodegradable resin.

Flowability improvement step (S24): Di-(2,4-dichlorobenzoyl)-peroxide was applied to the pulverized biodegradable resin manufactured in the biodegradable resin pulverization step (S22), thereby manufacturing a processed biodegradable resin.

Composite material manufacturing step (S30): The processed food by-product manufactured in the food by-product cellulose removal step (S14) and the processed biodegradable resin manufactured in the flowability improvement step (S24) were placed in a twin extruder at a weight ratio of 10:90, heated and stirred at a reaction temperature of 200°C and a screw rotation speed of 500 rpm to react and mold the composite material into a pellet form, and dried in a dehumidifying dryer at 80°C for more than 4 hours.

Comparative example 21 to 25. Manufacturing of materials using sikhye by-products

According to the following manufacturing method, composite materials of Comparative Examples 21 to 25 were manufactured.

Food by-product sugar removal step (S12): Sikhye by-product was heated to 70°C using alcohol as a solvent and stirred at a speed of 150 rpm to dissolve the sugar component in the solvent. The solvent containing the dissolved sugar component was removed, and the remaining residue was collected to produce a food by-product with the sugar removed. The above process was repeated three times.

Food by-product pulverization step (S16): The food by-product from which sugar has been removed, manufactured in the food by-product sugar removal step (S12), is supplied to a pulverizer at a speed of 30 kg/hr, and is first pulverized with a pulverizing blade having a speed of 5000 rpm, and the pulverized food by-product is transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30㎛ are transferred back to the pulverizing zone, and only the pulverized particles of 30㎛ or less are transferred by air and collected by a cyclone to manufacture processed food by-products.

Biodegradable resin crushing step (S22): Processed biodegradable resins were manufactured using PLA (Example 6), PHA (Example 7), PBAT (Example 8), PBS (Example 9), and PPC (Example 10), respectively. PLA (Example 6), PHA (Example 7), PBAT (Example 8), PBS (Example 9), and PPC (Example 10) were supplied to a grinding machine at a rate of 30 kg/hr, and first crushed with a grinding blade having a speed of 5000 rpm, and the crushed PLA (Example 6), PHA (Example 7), PBAT (Example 8), PBS (Example 9), and PPC (Example 10) were transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30 ㎛ were transferred back to the crushing zone, and only unpulverized particles of 30 ㎛ or less were transferred by air and collected by a cyclone to produce a crushed biodegradable resin.

Flowability improvement step (S24): Di-(2,4-dichlorobenzoyl)-peroxide was applied to the pulverized biodegradable resin manufactured in the biodegradable resin pulverization step (S22), thereby manufacturing a processed biodegradable resin.

Composite material manufacturing step (S30): The processed food by-product manufactured in the food by-product cellulose removal step (S14) and the processed biodegradable resin manufactured in the flowability improvement step (S24) were placed in a twin extruder at a weight ratio of 10:90, heated and stirred at a reaction temperature of 200°C and a screw rotation speed of 500 rpm to react and mold the composite material into a pellet form, and dried in a dehumidifying dryer at 80°C for more than 4 hours.

Comparative example 26 to 30. Manufacturing of materials using beer by-products

According to the following manufacturing method, composite materials of Comparative Examples 26 to 30 were manufactured.

Food by-product sugar removal step (S12): Beer by-product was heated to 70°C using alcohol as a solvent and stirred at a speed of 150 rpm to dissolve the sugar component in the solvent. The solvent containing the dissolved sugar component was removed, and the remaining residue was obtained to produce a food by-product with the sugar removed. The above process was repeated three times.

Food by-product pulverization step (S16): The food by-product from which sugar has been removed, manufactured in the food by-product sugar removal step (S12), is supplied to a pulverizer at a speed of 30 kg/hr, and is first pulverized with a pulverizing blade having a speed of 5000 rpm, and the pulverized food by-product is transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30㎛ are transferred back to the pulverizing zone, and only the pulverized particles of 30㎛ or less are transferred by air and collected by a cyclone to manufacture processed food by-products.

Biodegradable resin crushing step (S22): Processed biodegradable resins were manufactured using PLA (Example 11), PHA (Example 12), PBAT (Example 13), PBS (Example 14), and PPC (Example 15), respectively. PLA (Example 11), PHA (Example 12), PBAT (Example 13), PBS (Example 14), and PPC (Example 15) were supplied to a grinding machine at a rate of 30 kg/hr, and first crushed with a grinding blade having a speed of 5000 rpm, and the crushed PLA (Example 11), PHA (Example 12), PBAT (Example 13), PBS (Example 14), and PPC (Example 15) were transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30 ㎛ were transferred back to the crushing zone, and only unpulverized particles of 30 ㎛ or less were transferred by air and collected by a cyclone to produce a crushed biodegradable resin.

Flowability improvement step (S24): Di-(2,4-dichlorobenzoyl)-peroxide was applied to the pulverized biodegradable resin manufactured in the biodegradable resin pulverization step (S22), thereby manufacturing a processed biodegradable resin.

Composite material manufacturing step (S30): The processed food by-product manufactured in the food by-product cellulose removal step (S14) and the processed biodegradable resin manufactured in the flowability improvement step (S24) were placed in a twin extruder at a weight ratio of 10:90, heated and stirred at a reaction temperature of 200°C and a screw rotation speed of 500 rpm to react and mold the composite material into a pellet form, and dried in a dehumidifying dryer at 80°C for more than 4 hours.

The summary of the above comparative examples 16 to 30 is as shown in Table 3 below.

Applied food by-products Applied biodegradable resin Step (S12)
Applicability Step (S14)
Applicability Comparative Example 16 Sikhyebak + beerbak PLA ○ × Comparative Example 17 Sikhyebak + beerbak PHA ○ × Comparative Example 18 Sikhyebak + beerbak PBAT ○ × Comparative Example 19 Sikhyebak + beerbak PBS ○ × Comparative Example 20 Sikhyebak + beerbak PPC ○ × Comparative Example 21 Sikhyebak PLA ○ × Comparative Example 22 Sikhyebak PHA ○ × Comparative Example 23 Sikhyebak PBAT ○ × Comparative Example 24 Sikhyebak PBS ○ × Comparative Example 25 Sikhyebak PPC ○ × Comparative Example 26 beer gourd PLA ○ × Comparative Example 27 beer gourd PHA ○ × Comparative Example 28 beer gourd PBAT ○ × Comparative Example 29 beer gourd PBS ○ × Comparative Example 30 beer gourd PPC ○ ×

Comparative example 31 to 65. Biodegradable resins and rice sheaf , sawdust, rice husk, wood, wheat bran, coffee grounds or Cornstalk powder Manufacturing of applied materials

A container for a comparative example was manufactured by proceeding with the same process as the methods of Examples 1 to 3, but instead of the food by-products such as sikhye by-product or beer by-product, rice straw, sawdust, rice husk, wood, wheat bran, coffee grounds, and corn stalk powder were used.

Food by-product sugar removal step (S12): As shown in Table 4 below, different food by-products were heated to 70°C using alcohol as a solvent and stirred at a speed of 150 rpm to dissolve the sugar component in the solvent. The solvent in which the sugar component was dissolved was removed, and the remaining residue was obtained to produce food by-products from which the sugar component had been removed. The above process was repeated three times.

Food by-product cellulose removal step (S14): A hydrochloric acid solution was added to the food by-product from which sugar was removed, manufactured in the food by-product sugar removal step (S12), and stirred at a speed of 150 rpm while heating to a temperature of 70°C, and the hydrochloric acid solution in which cellulose was dissolved was removed, thereby manufacturing a food by-product from which sugar and cellulose were removed.

Food by-product pulverization step (S16): The food by-product from which sugar and cellulose have been removed, manufactured in the food by-product cellulose removal step (S14), is supplied to a pulverizer at a speed of 30 kg/hr, and is first pulverized with a pulverizing blade having a speed of 5000 rpm, and the pulverized food by-product is transferred to a separating blade according to the air flow by the blower, and through the separating blade, coarse particles exceeding 30㎛ are transferred back to the pulverizing zone, and only the pulverized particles of 30㎛ or less are transferred by air and collected by a cyclone to manufacture a processed food by-product.

Biodegradable resin crushing step (S22): As shown in Table 4 below, different biodegradable resins were applied to manufacture processed biodegradable resins. The biodegradable resin was supplied to the crushing device at a rate of 30 kg/hr, and was first crushed with a crushing blade having a speed of 5000 rpm. The crushed biodegradable resin was transferred to a separating blade according to the air flow by the blower, and coarse particles exceeding 30 ㎛ were transferred back to the crushing zone through the separating blade, and only uncrushed particles of 30 ㎛ or less were transferred by air and collected by a cyclone to manufacture a crushed biodegradable resin.

Flowability improvement step (S24): Di-(2,4-dichlorobenzoyl)-peroxide was applied to the pulverized biodegradable resin manufactured in the biodegradable resin pulverization step (S22), thereby manufacturing a processed biodegradable resin.

Composite material manufacturing step (S30): The processed food by-product manufactured in the food by-product cellulose removal step (S14) and the processed biodegradable resin manufactured in the flowability improvement step (S24) were placed in a twin extruder at a weight ratio of 10:90, heated and stirred at a reaction temperature of 200°C and a screw rotation speed of 500 rpm to react and mold the mixture to manufacture a cosmetic container, and dried in a dehumidifying dryer at 80°C for more than 4 hours.

The summary of the above comparative examples 31 to 65 is as shown in Table 4 below.

Applied by-products Applied biodegradable resin Step (S12)
Applicability Step (S14)
Applicability Comparative Example 31 rice sheaf PLA ○ ○ Comparative Example 32 rice sheaf PHA ○ ○ Comparative Example 33 rice sheaf PBAT ○ ○ Comparative Example 34 rice sheaf PBS ○ ○ Comparative Example 35 rice sheaf PPC ○ ○ Comparative Example 36 sawdust PLA ○ ○ Comparative Example 37 sawdust PHA ○ ○ Comparative Example 38 sawdust PBAT ○ ○ Comparative Example 39 sawdust PBS ○ ○ Comparative Example 40 sawdust PPC ○ ○ Comparative Example 41 chaff PLA ○ ○ Comparative Example 42 chaff PHA ○ ○ Comparative Example 43 chaff PBAT ○ ○ Comparative Example 44 chaff PBS ○ ○ Comparative Example 45 chaff PPC ○ ○ Comparative Example 46 wood PLA ○ ○ Comparative Example 47 wood PHA ○ ○ Comparative Example 48 wood PBAT ○ ○ Comparative Example 49 wood PBS ○ ○ Comparative Example 50 wood PPC ○ ○ Comparative Example 51 bran PLA ○ ○ Comparative Example 52 bran PHA ○ ○ Comparative Example 53 bran PBAT ○ ○ Comparative Example 54 bran PBS ○ ○ Comparative Example 55 bran PPC ○ ○ Comparative Example 56 coffee grounds PLA ○ ○ Comparative Example 57 coffee grounds PHA ○ ○ Comparative Example 58 coffee grounds PBAT ○ ○ Comparative Example 59 coffee grounds PBS ○ ○ Comparative Example 60 coffee grounds PPC ○ ○ Comparative Example 61 cornstalk powder PLA ○ ○ Comparative Example 62 cornstalk powder PHA ○ ○ Comparative Example 63 cornstalk powder PBAT ○ ○ Comparative Example 64 cornstalk powder PBS ○ ○ Comparative Example 65 cornstalk powder PPC ○ ○

Experimental Example 1. Confirmation of the effect of improving off-flavor

Fifty adult men and women were asked to smell and evaluate the odors of the cosmetic containers manufactured in Examples 1 to 15 and Comparative Examples 1 to 65 (very good: 5 points, good: 4 points, average: 3 points, bad: 2 points, very bad: 1 point). The results using a 5-point scale are presented as averages in Table 5 below.

Evaluation Score (Average) Example 1 4.8 Example 2 4.7 Example 3 4.8 Example 4 4.8 Example 5 4.7 Example 6 4.5 Example 7 4.4 Example 8 4.5 Example 9 4.5 Example 10 4.4 Example 11 4.5 Example 12 4.4 Example 13 4.4 Example 14 4.4 Example 15 4.5

Evaluation Score (Average) Comparative Example 1 3.6 Comparative Example 2 3.4 Comparative Example 3 3.4 Comparative Example 4 3.6 Comparative Example 5 3.6 Comparative Example 6 3.5 Comparative Example 7 3.6 Comparative Example 8 3.4 Comparative Example 9 3.4 Comparative Example 10 3.5 Comparative Example 11 3.4 Comparative Example 12 3.6 Comparative Example 13 3.4 Comparative Example 14 3.4 Comparative Example 15 3.5

Evaluation Score (Average) Comparative Example 16 3.5 Comparative Example 17 3.4 Comparative Example 18 3.6 Comparative Example 19 3.5 Comparative Example 20 3.5 Comparative Example 21 3.4 Comparative Example 22 3.4 Comparative Example 23 3.6 Comparative Example 24 3.4 Comparative Example 25 3.6 Comparative Example 26 3.5 Comparative Example 27 3.4 Comparative Example 28 3.5 Comparative Example 29 3.6 Comparative Example 30 3.5

Evaluation Score (Average) Comparative Example 31 2.8 Comparative Example 32 2.9 Comparative Example 33 2.8 Comparative Example 34 2.7 Comparative Example 35 2.7 Comparative Example 36 2.8 Comparative Example 37 2.9 Comparative Example 38 2.7 Comparative Example 39 2.7 Comparative Example 40 2.8 Comparative Example 41 2.9 Comparative Example 42 2.7 Comparative Example 43 2.8 Comparative Example 44 2.9 Comparative Example 45 2.6 Comparative Example 46 2.7 Comparative Example 47 2.8 Comparative Example 48 2.7 Comparative Example 49 2.6 Comparative Example 50 2.8 Comparative Example 51 2.9 Comparative Example 52 2.7 Comparative Example 53 2.6 Comparative Example 54 2.8 Comparative Example 55 2.9 Comparative Example 56 2.8 Comparative Example 57 2.7 Comparative Example 58 2.6 Comparative Example 59 2.9 Comparative Example 60 2.8 Comparative Example 61 2.7 Comparative Example 62 2.9 Comparative Example 63 2.8 Comparative Example 64 2.7 Comparative Example 65 2.6

As a result, in the case of containers manufactured with materials according to Examples 1 to 15 of the present invention, the test subjects did not significantly experience problems with off-flavors, and in the case of Comparative Examples 1 to 15 where step S12 was omitted, and in the case of Comparative Examples 16 to 30 where step S14 was omitted, it was confirmed that a large difference was shown compared to Examples 1 to 15. In the case of Comparative Examples 31 to 45 where other by-product materials were used, low scores were shown.

Experimental Example 2. Physical Property Verification Experiment

Using the cosmetic containers manufactured in Examples 1 to 15 and Comparative Examples 1 to 65, moisture permeability, low-temperature impact strength (cold resistance), secondary foaming rate, and elongation were measured.

According to ASTM F 1249, the moisture permeability was measured under the conditions of 37.8℃ and 100% relative humidity. Cold resistance measurement experiments were performed using the cosmetic containers of Examples 1 to 15 and Comparative Examples 1 to 65. The measurement method was to measure the impact strength at -10℃ according to the conditions of ASTM D 256. Secondary foaming refers to foaming that occurs when the foam produced through extrusion is preheated during the secondary processing of molding, and the thickness change that occurs after exposing the foam to a temperature of 215℃ for 30 seconds was measured. Under the conditions of AST, D 882, both ends of a 165mm X 19mm specimen were fixed with a fixture, and then the specimen was pulled in the axial direction to measure the rate of elongation of a predefined mark on the specimen due to tension.

moisture permeability
(g/m ² ·day) Low-temperature impact strength
(kJ/m ² ) Secondary firing rate
(%) Shin Yul
(%) Example 1 2.0g/ ^m2 36 170 8.9 Example 2 2.0g/ ^m2 35 180 8.8 Example 3 2.0g/ ^m2 36 180 8.7 Example 4 2.0g/ ^m2 35 170 8.9 Example 5 2.0g/ ^m2 36 170 8.8 Example 6 5.0g/ ^m2 30 190 7.4 Example 7 5.0g/ ^m2 31 190 7.2 Example 8 5.0g/ ^m2 31 200 7.3 Example 9 4.0g/ ^m2 30 190 7.3 Example 10 5.0g/ ^m2 31 190 7.5 Example 11 6.0g/ ^m2 30 200 7.6 Example 12 6.0g/ ^m2 32 210 7.4 Example 13 5.0g/ ^m2 31 210 7.5 Example 14 6.0g/ ^m2 32 190 7.9 Example 15 5.0g/ ^m2 30 200 7.5

moisture permeability
(g/m ² ·day) Low-temperature impact strength
(kJ/m ² ) Secondary firing rate
(%) Shin Yul
(%) Comparative Example 1 12.0g/ ^m2 28 220 6.8 Comparative Example 2 13.0g/ ^m2 27 230 6.7 Comparative Example 3 12.0g/ ^m2 28 220 6.7 Comparative Example 4 14.0g/ ^m2 28 230 6.8 Comparative Example 5 12.0g/ ^m2 28 220 6.8 Comparative Example 6 13.0g/ ^m2 26 240 6.7 Comparative Example 7 12.0g/ ^m2 24 230 6.8 Comparative Example 8 12.0g/ ^m2 26 240 6.5 Comparative Example 9 14.0g/ ^m2 25 230 6.6 Comparative Example 10 13.0g/ ^m2 26 240 6.7 Comparative Example 11 12.0g/ ^m2 24 240 6.6 Comparative Example 12 12.0g/ ^m2 26 230 6.7 Comparative Example 13 13.0g/ ^m2 26 240 6.5 Comparative Example 14 12.0g/ ^m2 24 240 6.8 Comparative Example 15 13.0g/ ^m2 26 230 6.6

moisture permeability
(g/m ² ·day) Low-temperature impact strength
(kJ/m ² ) Secondary firing rate
(%) Shin Yul
(%) Comparative Example 16 14.0g/ ^m2 28 220 6.8 Comparative Example 17 13.0g/ ^m2 27 230 6.7 Comparative Example 18 12.0g/ ^m2 28 230 6.8 Comparative Example 19 13.0g/ ^m2 27 220 6.7 Comparative Example 20 14.0g/ ^m2 28 230 6.8 Comparative Example 21 12.0g/ ^m2 26 240 6.5 Comparative Example 22 13.0g/ ^m2 24 230 6.7 Comparative Example 23 14.0g/ ^m2 26 240 6.6 Comparative Example 24 13.0g/ ^m2 26 240 6.5 Comparative Example 25 12.0g/ ^m2 25 240 6.6 Comparative Example 26 12.0g/ ^m2 24 230 6.7 Comparative Example 27 13.0g/ ^m2 26 230 6.5 Comparative Example 28 13.0g/ ^m2 26 240 6.6 Comparative Example 29 12.0g/ ^m2 24 230 6.7 Comparative Example 30 12.0g/ ^m2 26 240 6.6

moisture permeability
(g/m ² ·day) Low-temperature impact strength
(kJ/m ² ) Secondary firing rate
(%) Shin Yul
(%) Comparative Example 31 15.0g/ ^m2 23 250 4.7 Comparative Example 32 15.0g/ ^m2 24 260 4.4 Comparative Example 33 14.0g/ ^m2 22 250 4.2 Comparative Example 34 15.0g/ ^m2 22 270 4.8 Comparative Example 35 14.0g/ ^m2 23 250 4.5 Comparative Example 36 16.0g/ ^m2 24 260 4.4 Comparative Example 37 14.0g/ ^m2 23 250 4.6 Comparative Example 38 16.0g/ ^m2 23 260 4.5 Comparative Example 39 14.0g/ ^m2 21 270 4.3 Comparative Example 40 15.0g/ ^m2 22 250 4.8 Comparative Example 41 16.0g/ ^m2 23 250 4.4 Comparative Example 42 15.0g/ ^m2 22 260 4.5 Comparative Example 43 15.0g/ ^m2 22 250 4.3 Comparative Example 44 16.0g/ ^m2 23 260 4.6 Comparative Example 45 14.0g/ ^m2 23 250 4.4 Comparative Example 46 16.0g/ ^m2 21 250 4.3 Comparative Example 47 15.0g/ ^m2 22 270 4.9 Comparative Example 48 16.0g/ ^m2 23 250 4.3 Comparative Example 49 16.0g/ ^m2 21 260 4.0 Comparative Example 50 15.0g/ ^m2 24 250 4.3 Comparative Example 51 14.0g/ ^m2 23 250 4.2 Comparative Example 52 14.0g/ ^m2 22 260 4.6 Comparative Example 53 16.0g/ ^m2 22 250 4.9 Comparative Example 54 15.0g/ ^m2 23 260 4.4 Comparative Example 55 15.0g/ ^m2 24 270 4.2 Comparative Example 56 16.0g/ ^m2 22 250 4.0 Comparative Example 57 15.0g/ ^m2 21 260 4.6 Comparative Example 58 15.0g/ ^m2 22 250 4.4 Comparative Example 59 15.0g/ ^m2 23 270 4.5 Comparative Example 60 16.0g/ ^m2 24 250 4.6 Comparative Example 61 14.0g/ ^m2 23 260 4.3 Comparative Example 62 15.0g/ ^m2 24 270 4.4 Comparative Example 63 16.0g/ ^m2 23 250 4.2 Comparative Example 64 16.0g/ ^m2 22 260 4.3 Comparative Example 65 15.0g/ ^m2 22 250 4.4

In the case of Examples 1 to 15, the moisture permeability and low-temperature impact strength were excellent, so there was no problem in applying them to containers. In the case of Comparative Examples 1 to 30, where some steps were omitted, the moisture permeability and low-temperature impact strength were somewhat low, and in the case of Comparative Examples 31 to 65, where different raw materials were applied, the moisture permeability and low-temperature impact strength were low enough to make them unusable.

Meanwhile, in the case of Examples 1 to 15, the formability was improved as an appropriate thickness was formed through secondary foaming, whereas in the case of Comparative Examples 1 to 30, it was confirmed that the elongation decreased due to secondary foaming during the molding process. Accordingly, in the case of Examples 1 to 15, the elongation was excellent and there was no problem in practical use, in the case of Comparative Examples 1 to 30 where some steps were omitted, the elongation was somewhat reduced, and in the case of Comparative Examples 31 to 65 where different raw materials were applied, the elongation tended to be very low.

conclusion.

Through Experimental Examples 1 and 2 using the cosmetic containers manufactured in Examples 1 to 15 and Comparative Examples 1 to 65, the problem of off-flavor of the material manufactured according to the method for manufacturing a composite material using the biodegradable resin and food by-product of the present invention was solved, and the effects of strength improvement and carbon reduction were confirmed.

Accordingly, in Experimental Example 1, it was confirmed that a composite material using sikhye by-product or beer by-product as a raw material manufactured according to the method for manufacturing a composite material using a biodegradable resin and food by-product of the present invention had the effect of improving off-flavor.

In addition, in Experimental Example 2, it was confirmed that the composite material using sikhye by-product or beer by-product as raw material, manufactured according to the method for manufacturing a composite material using the biodegradable resin and food by-product of the present invention, had excellent physical properties.

In particular, the effect was the best when biodegradable resin and both sikhye by-products and beer by-products were included, and it was confirmed that an unexpected effect appeared depending on the mixing of sikhye by-products and beer by-products.

Accordingly, the present invention states that a composite material utilizing biodegradable resin and food by-products, which can reduce manufacturing costs, solve off-flavor problems, and improve strength by utilizing biodegradable resin and at least one food by-product selected from among sikhye by-products and beer by-products, and a method for manufacturing the same have been developed.

Although the present invention has been described with reference to the attached drawings, this is only one embodiment among various embodiments including the gist of the present invention, and the purpose is to enable those skilled in the art to easily practice it, and it is clear that the present invention is not limited to the embodiments described above. Therefore, the protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope by modification, substitution, replacement, etc., within the scope that does not depart from the gist of the present invention will be included in the rights of the present invention. In addition, it is clearly stated that some components of the drawings are provided in an exaggerated or reduced form compared to the actual size to more clearly explain the components.

(S10): Food by-product processing stage
(S12): Food by-product sugar removal step
(S14): Food by-product cellulose removal step
(S16): Food by-product pulverization stage
(S20): Biodegradable resin processing stage
(S22): Biodegradable resin crushing stage
(S24): Flow improvement stage
(S30): Composite material manufacturing stage

Claims (5)

A material utilizing biodegradable resin and food by-products, characterized in that the material is obtained by heating and stirring a processed food by-product in which sikhye by-product and beer by-product are mixed in a weight ratio of 40 to 60:60 to 40; and a biodegradable resin processed using a biodegradable resin; wherein the processed food by-product and the processed biodegradable resin are placed in a twin extruder in a weight ratio of 5:95 to 30:70, and heating and stirring at a reaction temperature of 100 to 300°C and a screw rotation speed of 300 to 800 rpm.
In the first paragraph,
The above biodegradable resin is characterized by being at least one of PLA, PHA, PBAT, PBS or PPC, and is a material utilizing biodegradable resin and food by-products.
In the first paragraph,
The processed food by-product is a biodegradable resin and a material utilizing food by-products, characterized in that the processed food by-product is processed by removing sugar and cellulose from at least one food by-product among the sikhye by-product and beer by-product.
In the first paragraph,
The processed biodegradable resin is a material utilizing biodegradable resin and food by-products, characterized in that the processed biodegradable resin is pulverized and a crosslinking agent is applied to improve flowability.
A food by-product processing step (S10) for manufacturing a processed food by-product in which sikhye by-product and beer by-product are mixed in a weight ratio of 40 to 60:60 to 40;
A biodegradable resin processing step (S20) for manufacturing a processed biodegradable resin using a biodegradable resin; and
A method for manufacturing a material utilizing biodegradable resin and food by-products, characterized by comprising a composite material manufacturing step (S30) in which the processed food by-product of the above food by-product processing step (S10) and the processed biodegradable resin of the above biodegradable resin processing step (S20) are placed in a twin extruder at a weight ratio of 5:95 to 30:70, and heated and stirred at a reaction temperature of 100 to 300°C and a screw rotation speed of 300 to 800 rpm and dried to manufacture a composite material.