KR101590758B1 - Reusing method of used plastics consist of TPU and ABS complex resin - Google Patents

Abstract

The present invention relates to a method for recycling waste plastic composed of thermoplastic polyurethane (TPU) and an acrylonitrile-butadiene styrene (ABS) resin. The method of the present invention comprises the following processes: a first process for removing surfactant components contained in a washing liquid by rinsing with water after washing with a washing machine capable of spraying the washing liquid onto the waste plastic composed of thermoplastic polyurethane and the acrylonitrile-butadiene styrene resin; a second process of pulverizing the washed waste plastic in a flake form using high-speed pulverizer at 50 HP after removing moisture from the waste plastic to dry the same; and a third process of producing a composite resin by blending and extrusion after inserting a resin composition into a hopper of a melting extruder, wherein the resin composition is produced by mixing 70-90 parts by weight of the pulverized waste plastic flake, 10-20 parts by weight of the ABS resin, 0-10 parts by weight of the TPU resin, and 1-3 parts by weight of a black master batch (M/B). According to the present invention, the method of the present invention can decrease waste of resources.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recycling waste plastics composed of thermoplastic polyurethane and acrylonitrile butadiene styrene resin,

The present invention relates to a method of recycling a waste plastic composed of a thermoplastic polyurethane and an acrylonitrile butadiene styrene resin, and more particularly, to a method of recycling waste plastics composed of a thermoplastic polyurethane (TPU) and an acrylonitrile butadiene styrene (ABS) The burner drums are cleaned and pulverized to recycle plastic products, particularly fiber spinner drums, and then a resin composition obtained by mixing ABS resin, TPU resin and black M / B is extruded into a composite resin And a thermoplastic polyurethane and an acrylonitrile-butadiene styrene resin whose properties are improved to such an extent as to exceed the properties of a single resin.

In general, plastics are not biodegradable within a natural ecosystem and retain their shape for a long time. Therefore, much research has been carried out on the recycling of used plastics, among which the agricultural greenhouses and beverage bottles are relatively easy to reuse because they are separately discharged or collected for each component. It is a technology that is now commercially available.

However, the recycling technology of composite plastics mixed with two or more components has not yet been developed. For example, there is a method of reusing each resin by separating and reusing each resin by a recycling method of two or more composite plastics, or adding a third plastic resin other than the two components to reuse. In such a case, the third component affects the physical and chemical properties of conventional plastics, and also acts as a factor for raising the cost of raw materials following recycling, thereby reducing the economic effect of recycling. Therefore, plastic wastes composed of these composite components are mainly processed by landfill or incineration.

For reference, the fiber spinner is a machine applied to the polyester filament fiber yarn processing. The most important drum part of the machine parts is a cylindrical injection molded plastic product made of TPU / ABS composite resin. In the present invention, since the burnishing drum to be recycled has a uniform and constant elasticity on the surface of the burning drum, the burning drum can be uniformly folded or kept constantly in the filament, so that the burning drum is replaced on an average cycle of 2 to 3 years. In the present invention, a technique for recycling a cylinder drum composed of a TPU / ABS resin, which is periodically replaced and discarded, has been studied, since the drum of the resulting twisted burner is incinerated or disposed of.

As described above, the fiber spinner drum is required to be cleaned by attaching foreign substances to the surface due to long-term use, and proper cleaning agent and mechanical process are required to perform an effective cleaning operation. Particularly, the fiber spinner drum is cylindrical and has a hollow cylindrical shape. In general washing process, it is difficult to remove contaminants easily. Therefore, in the present invention, a device for spraying water through the nozzles in the upper and lower sides is applied to more effectively remove foreign substances in the process of washing the cylinder drum.

In addition, a special surfactant was used to prevent re - adhesion of bubbles and contaminants in the washing process. The dried drum was pulverized to a particle size of 1 to 5 mm. The resin thus cut is processed into a composite resin using a melt extruder equipped with a cooling device and a heating device at the same time. Particularly, since the TPU / ABS composite resin has two different thermoplastic and physical properties, It has not been possible to date. However, in the present invention, the present inventors have completed the present invention by developing a method capable of melt-extruding the composite resin by adjusting the composition of the resin composite to an optimum state and adjusting the melting temperature and the cooling temperature of the extruder.

According to the conventional technology for producing a composite resin using waste plastics in connection with the present invention, Korean Registered Patent No. 10-0884222 (Announcement: 2009. 02. 17) discloses an acrylonitrile butadiene styrene copolymer (PC) to the ABS resin to regenerate the resin, thereby preventing deterioration in the quality of the used plastic during the regeneration process and improving the quality of the recycled resin.

In addition, Korean Patent Laid-Open Publication No. 10-2006-0109905 (published on October 23, 2006) discloses that a light-shielding pigment or a light-shielding filler is added to a pulverized waste plastic material in which a small amount of solid foreign matter is mixed. A recycled resin composition showing a specific lightness and a light transmittance obtained by mixing a light shielding component and heating and melting the mixture is obtained from a pulverized waste plastic material containing a solid foreign matter which can be effectively used for the production of a synthetic resin product having no apparent defect The present invention relates to a method for recycling a plastic waste by adding a third plastic resin or the like to a conventional waste plastic, and it relates to a method for recycling a plastic waste by using a waste plastics made of a composite resin component such as a TPU / ABS resin Because it does not provide a description of how to recycle Is aware that there is a problem.

Korean Patent Registration No. 10-0884222 (Notification Date: Feb. 17, 2009) Korean Patent Publication No. 10-2006-0109905 (published on October 23, 2006)

It is an object of the present invention to provide a drum of a waste plastic, in particular, a fiber spinning machine whose end use has been completed, wherein the polyurethane (TPU) and the acrylonitrile butadiene styrene (ABS) resin are crushed or cut into a cylinder- In order to solve the disadvantage that different components are not uniformly mixed even if they are mixed, the drum is washed and pulverized, and then the composite resin is produced by changing the blending composition and temperature condition at the time of extrusion, And a method of recycling waste plastics comprising thermoplastic polyurethane and acrylonitrile butadiene styrene resin which is improved to an excellent extent.

The method for recycling waste plastics composed of a thermoplastic polyurethane and an acrylonitrile butadiene styrene resin according to the present invention is a method of recycling waste plastic up and down to a waste plastic composed of a thermoplastic polyurethane (TPU) and an acrylonitrile butadiene styrene (ABS) resin A first step of washing with a nozzle type cleaning apparatus for 5 to 20 minutes, discharging the washing solution, and then washing the solution with water for 1 to 2 minutes to remove the surfactant component contained in the washing solution ; A second step of removing water from the washed waste plastic, drying it, and then pulverizing it into flakes of 1 to 5 mm in particle size using a high-speed pulverizer of 50 HP; A resin composition obtained by mixing 70 to 90 parts by weight of the pulverized waste plastic flakes, 10 to 20 parts by weight of an ABS resin, 0 to 10 parts by weight of a TPU resin, and 1 to 3 parts by weight of a black masterbatch (black M / B) And a third step of blending and extruding the mixture to produce a composite resin.

According to a preferred embodiment of the present invention, the washing solution in the first step is a nonionic surfactant having a cloud point of 40 to 50 ° C. LA (Lauryl Alcohol) -7 2 moles in which lauryl alcohol and 7 moles of ethylene oxide are added %; 2% by weight of sodium polyacrylate as an anionic surfactant; And 0.5% by weight of sodium ethylenediaminetetrahexatitic acid, and the temperature of the extruder in the third step is 180-190 ° C for the feed part, 170-180 ° C for the compressed part, Lt; RTI ID = 0.0 > 175 C. < / RTI > The composite resin produced in the third step has an impact strength of 25 to 35 kg cm / cm, a fluidity of 30 to 40 g / 10 min, a tensile strength of 350 to 450 kg / cm ² , and an elongation of 40 to 60%.

The present invention can be reused as a general resin through a composite resin recycling technology using waste plastic, especially a fiber spinner drum composed of two components of polyurethane (TPU) and acrylonitrile butadiene styrene (ABS) resin, There is an effect to contribute. Accordingly, the present invention can be applied to the production of various kinds of plastic injection products by replacing the commonly used ABS resin or ABS composite resin by recycling waste plastic composed of TPU resin and ABS resin, And the quality of the regenerated product can also be increased to exceed the inherent physical properties of the pure ABS resin.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a configuration diagram showing a feeding section, a compression section, a metering section and the like of an extruder applied to the waste plastic recycling method of the present invention. Fig.
Fig. 2 is a photograph showing a state in which a product is discharged from the cooling device of the extruder according to the present invention.
Fig. 3 is a photograph of a real image showing the composite resin produced by the present invention.

A method of recycling waste plastic according to the present invention is a method of recycling waste plastics using a nozzle type cleaning apparatus capable of spraying a cleaning liquid up and down on waste plastics composed of thermoplastic polyurethane (TPU) and acrylonitrile butadiene styrene (ABS) A first step of washing for 20 minutes, discharging the washing solution, and then washing with water for 1 to 2 minutes to remove the surfactant component contained in the washing solution; A second step of removing water from the washed waste plastic, drying it, and then pulverizing it into flakes of 1 to 5 mm in particle size using a high-speed pulverizer of 50 HP; A resin composition obtained by mixing 70 to 90 parts by weight of the pulverized waste plastic flakes, 10 to 20 parts by weight of an ABS resin, 0 to 10 parts by weight of a TPU resin, and 1 to 3 parts by weight of a black masterbatch (black M / B) And a third step of blending and extruding the mixture to produce a composite resin.

Hereinafter, the process of each step of the present invention will be described in detail. However, it is to be understood that the present invention is not limited to the technical idea of the present invention, And does not mean that the category is limited.

First, the first step is to wash for 5 to 20 minutes using a nozzle type cleaning apparatus capable of spraying the cleaning liquid up and down on waste plastics composed of thermoplastic polyurethane (TPU) and acrylonitrile butadiene styrene (ABS) resin And washing the solution with water for 1 to 2 minutes to remove the surfactant component contained in the cleaning solution. As a result, the plastic parts of the conventional plastic parts are adhered to the surface due to the long- Processes are required and proper cleaning agents and physical processes are required to perform efficient cleaning operations. In particular, since the fiber spinner drum is cylindrical and has an internal hollow structure, it is difficult to easily remove contaminants in a general washing process. Accordingly, in the present invention, foreign substances are more effectively removed in a process of washing waste plastic articles such as a fiber spinner drum A device for spraying water from above and below through a nozzle was applied.

As a result of many experiments in the present invention, it has been found that the washing solution in the first step is a nonionic surfactant having a cloud point of 40 ° C to 50 ° C, and LA (Lauryl Alcohol) -7 having 7 moles of ethylene oxide in lauryl alcohol 2% by weight; 2% by weight of sodium polyacrylate as an anionic surfactant; And 0.5% by weight of sodium ethylenediaminetetraethylhexanoate as a water purification agent was used as a water-based cleaning agent. That is, the cylinder drum used in the fiber spinning machine is cleaned by separating bolts, nuts, and the like. The aqueous solution of the cleaning solution is a nonionic surfactant for performing effective removal of oil, silicone, 2% by weight of LA (Lauryl Alcohol) -7 in which 7 mol of ethyl alcohol was added to lauryl alcohol, and 2% by weight of sodium polyacrylate as an anionic surfactant in order to prevent re-adhesion of cleaned oil and foreign matter In order to increase the efficiency in the washing step, the cleaning effect in the first step can be maximized by mixing about 0.5% by weight of ethylenediaminetetraethylhexanoic acid as a water purification agent capable of chelating metal ion components in water have.

The second step is a process of removing moisture from the washed waste plastic, drying it, and then pulverizing the pulverized resin in a flake state having a particle size of 1 to 5 mm using a high-speed pulverizer of 50 HP. The TPU / ABS composite resin is processed by using a melt extruder equipped with a cooling device and a heating device at the same time as it is suitable for injection. Particularly, the TPU / ABS composite resin has different thermal and physical properties of the two polymer resins, However, in the present invention, a method capable of optimally controlling the composite resin extrusion process by appropriately adjusting the composition of the resin and adjusting the melting temperature and the cooling temperature of the extruder has been developed.

For reference, polyurethane (PU) is excellent in elasticity, abrasion resistance, and processability, and is widely used in industrial and consumer products and parts. Since the properties of polyurethane vary depending on the type of polyurethane, Conventional polyurethanes can be classified into thermoplastic (molded by heat) and thermoset (thermally hardened). On the other hand, thermoplastic polyurethane (TPU) is manufactured by dissolving in heat, so extrusion, vacuum molding, thermal bonding and high frequency processing are possible. By working by extrusion and injection method, there is no additional additive. It is a thermoplastic polyurethane elastomer capable of extrusion molding, injection molding, calender molding, and easy workability. However, it has a weak problem in hot water, strong acid, polar solvent, etc. However, It is widely used not only for the use of engineering plastics but also for sporting goods, household goods, industrial products, etc.

The ABS resin is an acrylonitrile-butadiene-styrene copolymer resin. The ABS resin, which is basically a styrene-acrylonitrile copolymer made by modifying a butadiene rubber, is a butadiene monomer having high impact resistance , An acrylonitrile unit having good heat resistance, and a styrene monomer unit imparting strength to the copolymer. ABS resin is used for injection molding, blow molding and extrusion molding. It is used for injection molding, blow molding and extrusion molding. The composition and molecular weight of resin used, kind of rubber, composition, particle size, , The graft ratio, the ratio of the resin to the rubber, or by adding a fourth new component, it is known that the properties can be significantly changed.

Finally, in the third step, 70 to 90 parts by weight of the pulverized waste plastic flakes, 10 to 20 parts by weight of an ABS resin, 0 to 10 parts by weight of a TPU resin, and 1 to 3 parts by weight of a black masterbatch (black M / B) Wherein the temperature of the extruder is in the range of 180-190 DEG C, the temperature of the extruder is 170-180 DEG C, the temperature of the extruder is 165 DEG C, and the temperature of the extruder is 165 DEG C To 175 [deg.] C is generally preferable to the manufacturing process in consideration of the melting point of the ABS resin and the TPU resin. Accordingly, the composite resin produced in the third step has an impact strength of 25 to 35 kg cm / cm, a fluidity of 30 to 40 g / 10 min, a tensile strength of 350 to 450 kg / cm ² and an elongation of 40 to 60% It has available physical properties.

The black masterbatch (black M / B) refers to a masterbatch pigmented with a black pigment. In the process of mixing the compounding agent with the plastic and rubber raw materials, the compounding agent is mixed at a higher concentration than the prescription The kneaded master batch can be mixed with plastic and rubber to precisely weigh each compounding agent, improve dispersion, and prevent scattering during work, which is a necessary product to increase the productivity of plastic molding processing , And the description thereof is well known in the related art, so a detailed description thereof will be omitted.

As described above, the present invention can easily reuse single components among plastic materials used and discarded, but it is difficult to reuse resins composed of a composite resin or two or more components, In particular, fiber spinner drums are TPU / ABS mixed resins which are expensive engineering plastics. As a result, the present inventors have found that the advantages of TPU resin, which is an engineering plastic, and the physical properties of ABS resin can be maintained well by regenerating a cylinder drum as a composite resin, and physical properties such as physical properties Of the population.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention.

[Example 1]

The cylinder drum was charged into a kneader with 800 g of flake mixed resin, 180 g of ABS resin and 20 g of black M / B, each having a particle size of 1 to 5 mm, and the mixture was mixed at a RPM of 20 and introduced into a hopper. The injected resin produced a composite resin using a Twin-Screw Extruder (SM PLATEK Co. Ltd. TEK 45, Co-rotating) with a screw diameter of 46.2 mm and a ratio of 30/1 = L / D. The condition of the compressor was prepared by maintaining the temperature of the feed part at 180-190 ° C, the temperature at the compression part at 170-180 ° C, and the temperature at the metering part at 165-175 ° C, followed by blending and extrusion to produce a uniform composite resin.

[Example 2]

The temperature condition of the compressor served as an important factor in the composition of Example 1 above. When the temperature of the supply part of the compressor was maintained at 190 to 200 캜, which is a processing condition of the TPU resin, a temperature rise was observed at about 10 캜 due to the heat generation due to friction at the inlet part, and the final blended resin composition showed a nonuniform shape. When the temperature of the supply part is maintained at 170 to 180 ° C and the temperature of the compression part is maintained at 180 ° C, the temperature of the metering part rises to 190 ° C or more, and the metering part is cooled through a separate cooling device, A composite resin can be produced. Therefore, when the temperature of the inlet portion is increased, the temperature adjustment in the compression portion becomes a problem and the unstable product condition is exhibited. Therefore, it has been confirmed that the temperature condition of the extruder in the present invention is an important factor in the manufacturing process.

[Example 3] - [Example 4], [Comparative Example 1] - [Comparative Example 4]

It can be seen that an appropriate amount of ABS resin should be mixed in an appropriate amount to form a uniform composite in the manufacturing process of the above-described Example 1. In general, plastic composites may form a uniform composite in the entire composition when two components are used, Only the composition of the ratio may form a homogeneous complex. In the present invention, such properties were observed. Composites having different ratios at which the respective resins were added were subjected to the compositions shown in Table 1.

division Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Cylinder Drum Flake 900g 800g 700g 600g 950 g 1000g ABS resin 100g 200g 300g 400g 50g - Black M / B 20g 20g 20g 20g 20g 20g

In the case of Comparative Example 4, when the composite of the waste cylinder drum alone was performed, the composite exhibited a non-uniform shape. However, when 100 g of ABS resin and 200 g of ABS resin, respectively, were used as in Example 3 and Example 4, a uniform composite was formed. When 300 g of ABS resin and 400 g of ABS resin were used as in Comparative Examples 1 and 2, , And it was confirmed that even when 50 g of the ABS resin was used as in Comparative Example 3, a heterogeneous composite was formed. Therefore, it is most preferable to use about 10 to 20 parts by weight of ABS resin and about 1 to 3 parts by weight of Black M / B based on 80 to 90 parts by weight of the cylinder drum flake resin.

[Example 5] - [Example 6], [Comparative Example 5] - [Comparative Example 8]

In order to improve the physical properties in the composite manufacturing process as in the above-described Example 1, an engineering plastic or a resin having other properties may be added to improve the physical properties. In the present invention, when the waste plastics are used, problems such as decrease in strength and durability are solved An experiment was conducted in which an appropriate amount of a TPU resin was mixed and the composition of the mixture was shown in [Table 2].

division Example 5 Example 6 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Cylinder Drum Flake 750g 700g 950 g 900g 800g 700g ABS resin 200g 200g - - - - TPU resin 50g 100g 50g 100g 200g 300g Black M / B 20g 20g 20g 20g 20g 20g

In the above Examples and Comparative Examples, a blending experiment was conducted while increasing the TPU resin. However, when the TPU resin was increased, a problem occurred in producing a uniform composite. That is, in the case of Example 5 and Example 6 in which TPU resin was used in the range of 50 to 100 g within the limits of Example 3 and Example 4, a relatively uniform composite was formed. However, when the TPU resin was further increased, It was difficult to commercialize the product and the temperature adjustment of the extruder was difficult. Therefore, it has been confirmed that an appropriate amount of ABS resin and TPU resin should be mixed in order to produce a uniform composite in recycling the waste cylinder drum. According to Examples 5 and 6, the cylinder drum flake resin 70 to 75 weight It is most preferable to apply about 20 parts by weight of the ABS resin, about 5 to 10 parts by weight of the TPU resin, and about 1 to 3 parts by weight of the black M / B.

Therefore, the composite resin of the present invention comprises 70 to 90 parts by weight of a waste plastic flake composed of a TPU resin and an ABS resin, 10 to 20 parts by weight of an ABS resin, a TPU resin 0 to 10 parts by weight, and 1 to 3 parts by weight of a black masterbatch (black M / B) can be uniformly formed by the resin composition.

[Experimental Example 1]

Specimens of the composite resins prepared by the methods of the above Examples and Comparative Examples were prepared and their physical properties were measured to confirm their applicability to the regenerated resin. Typically, the physical properties of the resin were measured on the basis of ASTM and the results are shown in Table 3.

division unit Example 3 Example 4 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Impact strength ⁽¹⁾ Kg cm / cm 28 35 35 38 10 5 Liquidity ⁽²⁾ g / 10 min 40 35 32 35 35 25 Tensile strength ⁽³⁾ Kg / cm 2 420 450 290 280 60 41 Elongation rate ⁽⁴⁾ % 50 75 40 50 5 3

(1) ASTM D256, (2) ASTM D1238, (3) ASTM D638, (4) ASTM D412

From the above experimental results, it can be confirmed that the compositions of Examples 3 and 4 of the present invention sufficiently show the physical properties of general ABS resin. When the ABS resin is further increased, impact strength and fluidity are not greatly changed, but the tensile strength and elongation rate are rapidly lowered. This means that when the ABS resin is increased to a certain amount or more, the two components are not uniformly mixed, but the TPU resin is dispersed in the ABS resin, which means that unevenness occurs in the two kinds of resin interfaces, . Therefore, it can be seen that the addition of a certain amount of ABS resin can smoothly regenerate the composite resin, and excessive use adversely affects the physical properties of the composite.

[Experimental Example 2]

The results of evaluating the physical properties in the case of Example 5, Example 6, and Comparative Examples 5 to 8 are shown in [Table 4]. In the case of using the TPU resin in the same compositions as in Examples 5, 6 and Comparative Example 5, it is possible to form a relatively uniform composite, but when the TPU is increased, the melt temperature condition of the ABS resin contained in the crushed cylinder drum is not matched, Processing was difficult. Therefore, in this experiment, only the physical properties of the processable resin composite were evaluated.

division unit Example 5 Example 6 Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Impact strength ⁽¹⁾ Kg cm / cm 30 40 20 - - - Liquidity ⁽²⁾ g / 10 min 35 36 35 - - - Tensile strength ⁽³⁾ Kg / cm 2 450 480 160 - - - Elongation rate ⁽⁴⁾ % 60 150 15 - - -

(1) ASTM D256, (2) ASTM D1238, (3) ASTM D638, (4) ASTM D412

From the results of the experimental measurements in [Table 3] and [Table 4], it was found that the addition of the TPU resin alone in the present invention had a problem in physical properties and a problem in processing. However, it can be confirmed that when the ABS resin is added alone or when a certain amount of TPU resin is added at the same time, the physical properties of the composite resin are improved and the composite is easily formed.

Therefore, the product developed by the present invention is a composite resin that is environmentally friendly and can be sufficiently applied in terms of resource recycling, and can be used as a substitute for a conventional general-purpose ABS resin, that is, for use in a refrigerator, a washing machine, a vacuum cleaner, a fan, a radio, Electric appliances, automotive interior and exterior parts, miscellaneous goods such as stationery, toys, bags, shoe heels, housewares, housing parts, sporting goods, spinning machines, office machines, sewing machines, knitting machines, watches, optical instruments, The present invention can be used in various applications and forms without departing from the technical idea of the present invention.

Claims (4)

Cleaning was performed for 5 to 20 minutes using a nozzle-type cleaning apparatus capable of spraying the cleaning liquid up and down on waste plastics composed of thermoplastic polyurethane (TPU) and acrylonitrile-butadiene styrene (ABS) resin, Next, a first step of washing with water for 1 to 2 minutes to remove the surfactant component contained in the washing solution;
A second step of removing water from the washed waste plastic, drying it, and then pulverizing it into flakes of 1 to 5 mm in particle size using a high-speed pulverizer of 50 HP;
A resin composition obtained by mixing 70 to 90 parts by weight of the pulverized waste plastic flakes, 10 to 20 parts by weight of an ABS resin, 0 to 10 parts by weight of a TPU resin, and 1 to 3 parts by weight of a black masterbatch (black M / B) Into a hopper of a hopper, blending and extruding the mixture to produce a composite resin;
Wherein the thermoplastic polyurethane and the acrylonitrile butadiene styrene resin are recycled. The method according to claim 1,
The washing solution in the first step is a nonionic surfactant having a cloud point of 40 to 50 ° C, and 2 wt% of LA (Lauryl Alcohol) -7 in which 7 mol of ethyl alcohol is added to lauryl alcohol; 2% by weight of sodium polyacrylate as an anionic surfactant; And 0.5% by weight of sodium ethylenediaminetetraethylhexanoate as a water-insoluble agent, and a thermoplastic polyurethane and an acrylonitrile-butadiene styrene resin. The method according to claim 1,
Wherein the temperature of the extruder in the third step is maintained at a temperature of 180-190 占 폚 for the feed portion, a temperature of 170-180 占 폚 for the compression portion, and a temperature of 165-175 占 폚 for the metering portion. The thermoplastic polyurethane and the acrylonitrile butadiene styrene resin Recycled waste plastics. The method according to claim 1,
Wherein the composite resin produced in the third step has an impact strength of 25 to 35 kg cm / cm, a fluidity of 30 to 40 g / 10 min, a tensile strength of 350 to 450 kg / cm ² , and an elongation percentage of 40 to 60% A recycling method of waste plastics comprising acrylonitrile butadiene styrene resin.

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