KR100816803B1 - A recycling method for plastic materials of used vehicle lamp systems - Google Patents

Abstract

The present invention relates to a method for recycling the raw material of the waste lamp system plastic for automobiles, and more specifically, acrylonitrile butadiene styrene (hereinafter referred to as "ABS") and poly Polymethyl Meth Acrylate (hereinafter referred to as "PMMA") is recovered from the used vehicle and recycled to the exterior lamp housing materials and other exterior parts of new cars, but the ABS and PMMA are not separated separately by material. After removing the metal components by the magnetic screening method, and controlling the mixing ratio of recycled ABS and recycled PMMA to improve the physical properties, new ABS, ordinary additives or mixed with the recycled ABS / recycled PMMA mixture at the same time to the new car lamp system Conventionally dispose of as waste The present invention relates to a method for recycling plastic raw materials for automobile waste lamp systems that can reduce the economic burden and environmental burden by developing a recycling process for recycling a used lamp and efficiently recycling waste resources.

Recycling, car lamp, ABS, PMMA

Description

 A waste method for plastic materials of used vehicle lamp systems             

1 is a vehicle direction indicator lamp housing manufactured using ABS and PMMA recycled material.

2 briefly illustrates one embodiment of an automotive lamp system.

[Description of Main Symbols in Drawing]

10: automotive lamp system 12: lens

14: housing 16; bulb

18; Hot melt 20; Aluminum deposit

22: socket 24: electric wire

The present invention relates to a method for recycling waste lamp system plastic raw materials for automobiles, and more particularly, ABS and PMMA, which are plastic raw materials for automobile lamp systems, are recovered from waste cars to cover exterior lamp housing materials and other exterior components of new cars. Recycling by recycling, but without breaking the ABS and PMMA separately by material, and crushed in a batch to remove only the metal components by magnetic screening method, by mixing the new ABS to improve the physical properties by adjusting the mixing ratio of recycled ABS and recycled PMMA, By adding the usual additives to the recycled ABS / recycled PMMA mixture and recycling them to the materials of the lamp system of new cars, we develop a recycling process to recycle the lamps that are disposed of as a waste and efficiently recycle the waste resources. Cars can reduce economic and environmental burdens It relates to a method of recycling waste plastic raw material Lamp System.

Automotive lamp system consists of electric wire, light bulb, housing part and lens part, and lamp housing consists mainly of polypropylene (hereinafter referred to as "PP") and ABS which are plastic materials. Ingredients can be broadly divided into PMMA.

The grade of the plastic components that make up the lamp system differs depending on the automobile manufacturer, and even in the same manufacturer, the characteristics of the plastic components vary in terms of properties.

The plastic material of the lamp housing part is made up of 50% PP and 50% ABS. Unlike most PP materials used in the past, ABS materials are currently used in most cases.

Therefore, although the material of the housing which is recovered and discarded from the car that is being scrapped now has many PP components that have been adopted in the past, there is a need to secure not only PP materials but also recycling technology of ABS-based housing materials.

According to overseas statistics, about 6-7% of the number of vehicles owned is expected to be disposed of annually, which can be applied domestically. Meanwhile, the number of automobiles in Korea has already surpassed 10 million in 1997, resulting in the generation of scrapped cars by 590,000 in 1997, and in 2001, the number of cars owned rose to more than 13.8 million. The number of automobiles is also rapidly increasing to more than 820,000 units, which can be expected to increase further over time.

However, a large part of the scrapped cars is being discarded without having an opportunity to be recycled, and the recycled materials are mainly metal materials such as steel materials and aluminum materials of the engine system, which are about 75% recycled. Becoming,

However, the plastic materials constituting the bumper, the lamp, and the like are not recovered and are mostly disposed of as waste. In other words, in order to dispose of valuable resources, the environmental welfare and economic loss of waste disposal should be taken again, especially in the case of Korea where there are few resources remaining.

As described above, until now, there is no method developed as a technology for recycling plastic parts for waste vehicles.

In addition to the main materials such as PP, ABS, and PMMA, among the plastic parts of automobiles, the direction lamp system has a small amount of hot melt that bonds them together with aluminum deposited on the inner surface of the housing to effectively reflect light. Bolt-nuts and electrical wiring, light bulbs, etc. for attaching the parts to the vehicle body are present in the lamp system.

In other words, as it is mixed with various heterogeneous materials and impurities as described above, it is difficult to recycle the plastic materials of the lamp system, and in order to recycle them, they must be separated by each component and foreign substances such as aluminum components and adhesive materials on the material surface are removed. This involves a lot of technical difficulties.

Therefore, the waste lamp system, like other plastic parts, is crushed in the process of scrapping, and is disposed with or disposed of as waste scraps with other components.

Therefore, the development of a simple process that can be recycled in the vehicle lamp system recovered from the vehicle body is very urgent situation.

Therefore, the inventors of the present invention do not separate ABS and PMMA, which are the main plastic parts, among the lamp materials collected from the abandoned vehicle by material, and crush the surface deposits and hot melt adhesives in a separate state without separating and selecting them separately. It has been found that the screening process of the closed lamp system can be shortened by removing only the metal components by the screening method and removing some impurities during the reprocessing material processing. In addition, when the new ABS, the usual additives or a mixture thereof is appropriately simultaneously introduced into the recycled ABS and the recycled PMMA mixture, a slight composition correction can be realized, thereby completing the present invention.

Therefore, the present invention is shredded in a state in which the housing material and the lens material of the waste lamp system collected collectively from the waste car regardless of the grade according to the manufacturer and vehicle type, but not separately separated, hot melt and aluminum that had previously acted as a foreign matter Plastic material recycling process of automobile waste lamp system that can remove metals by magnetic screening method without segregation and recycling, mixing ratio of recycled ABS and recycled PMMA that can express optimal properties and recycled ABS It is an object of the present invention to provide a recycling method for waste lamp system raw materials for automobiles which can exhibit excellent physical properties by introducing new ABS, conventional additives or mixtures thereof into the recycled PMMA.

The present invention is a method for recycling after removing the metal component from the waste plastic material for automobiles, 1) a state containing the adhesive material and the surface treatment material of the housing without separating the housing material and the lens material of the plastic material in the collected waste lamp system Simultaneously crushing and then removing metal components and foreign substances by magnetic screening; 2) preparing a recycled ABS / regenerated PMMA mixture in which the plastic component from which the metal component has been removed in the first step is mixed with the ABS component of the housing and the PMMA component of the lens and simultaneously pulverized, and then mixed with the new ABS to adjust the mixing ratio; And 3) manufacturing a lamp housing for a vehicle using the recycled ABS / regenerated PMMA mixture prepared in step 2 above.

According to the present invention in more detail as follows.

In the present invention, ABS and PMMA, which are plastic raw materials of automobile lamp system, are recovered from a waste car and recycled to exterior lamp housing material and other exterior parts of a new car, and the ABS and PMMA are not collectively separated by materials. After crushing to remove metal components by magnetic screening method, the new ABS is mixed to adjust the mixing ratio of recycled ABS and recycled PMMA, and by introducing ordinary additives to the recycled ABS / regenerated PMMA mixture with controlled mixing ratio, the physical properties are improved. It is possible to reduce the economic burden and the environmental burden by developing a recycling process that makes it possible to recycle the material of the lamp system, that is, recycles the lamp which was disposed of as waste.

The waste lamp system for automobiles according to the present invention will be described in detail step-by-step recycling method of raw materials as follows.

The first step is to simultaneously crush the housing material and the lens material, which are plastics, in the collected waste lamp system and then remove metal components and foreign substances.

First, separate the electric wire and bulb part, not plastic part, from the direction indicator lamp system for automobiles, and then collect and crush the plastic part.The raw materials ABS and PMMA are collected from scrap cars without separating them according to the type and grade of plastic material. It is a feature of the present invention to omit the step of separating the plastics by material, and the step of separating the adhesive material and the coating material inside the housing by simultaneously crushing and simultaneously crushing.

In other words, the plastic parts used in the automotive lamp system have different physical properties depending on the manufacturer and the vehicle type, and thus, they are conventionally used separately for each grade. Also, ABS and PMMA also cannot be crushed and mixed at the same time because they have different physical properties. Since a separate crushing and mixing process was required, the present invention solved the above problem by adjusting the composition ratio by mixing the recycled ABS and regenerated PMMA in the next step, but by mixing the new material and blending the additives properly.

In addition, in the lamp system, there is a hot melt used for the adhesion of each component in addition to the plastic and metal, and an aluminum component deposited on the inner surface of the housing to effectively reflect the light. In the present invention, the foreign matter is not separately separated. Another feature is that the crushing used shortens the process for separating these foreign matters.

The second step is a step of mixing into a plastic component from which the metal component has been removed in the first step and pulverizing at the same time, then introducing the additive into the mixture adjusted the mixing ratio of the recycled ABS component and the recycled PMMA component to process into pellets.

In this step, only the metal component is removed, and then the recycled ABS and recycled PMMA, which are mixed and pulverized, are prepared at a ratio of 60 to 80:20 to 40 weight ratio similar to that used for the raw parts, and then the recycled ABS / regenerated In order to improve the properties of the PMMA mixture, new ABS and additives or these are used simultaneously. The new ABS may be added in an amount of 50 to 70 parts by weight based on 100 parts by weight of the total recycled ABS / regenerated PMMA mixture. In this case, when the added amount is less than 50 parts by weight, the tensile properties such as tensile strength, modulus, elongation, etc. Falling out and exceeding 70 parts by weight is economically undesirable.

In addition, to improve the compatibility of ABS and PMMA to produce a recycled plastic composition of excellent physical properties by mixing the additives to produce a recycled resin by the polymer blend method, the additives that can be used at this time is SEBS-MA (maleic anhydride modified modified Compatibilizers such as styrene ethylene butadiene styrene block copolymers, and heat stabilizers such as butyl hydroxy toluene (BHT), and the like can be used in an amount of 5 to 10% by weight based on the total mixture of ABS and PMMA. At this time, the addition amount is less than 5% by weight can not produce the effect of the additive, when it exceeds 10% by weight is not economically preferable.

In this way, a separate process of separating the components of the lamp system is omitted as a method of manufacturing recycled materials, and greatly shortens the complicated process required to remove foreign substances such as adhesives and housing deposition agents attached to the lamp housing and the lens material. You can.

In addition, by adjusting the mixing ratio of the separated regenerative housing component and the regenerative lens component, it can be used as a lamp housing material having good physical properties even if the product is made of recycled raw materials, new material component By properly formulating a new material with excellent physical properties, it is economical and environmental burden can be reduced by reducing raw material cost and disposal cost.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited by the following Examples.

Production Example

Recovering the lamp system from the discarded car body, separating light bulbs and electric wires, crushing the housing and lens made of different plastic materials together, and mounting bolts mounted on the housing by magnetic screening in a magnetic roll equipped with a continuous conveying conveyor device. Only iron and metal components were removed. The recycled ABS and recycled PMMA from which metal components are removed are subjected to a general plastic material recycling process, and then the new ABS is mixed to melt the mixture at 220-250 ° C. to produce pellets. Next, injection molding was performed to produce a regenerated lamp housing. The physical properties of the regenerated lamp housing specimens were measured by the method of the following test example, and the change in the physical properties according to the mixing ratio was shown in Table 1, and the heat resistance was measured and shown in Table 2 below.

Example 1

A recycled raw material obtained by recovering and crushing the waste direction indicator lamp system from the vehicle body discarded in the same manner as in the manufacturing example, and then removing only the metal component by magnetic screening, and adjusting the mixing ratio of recycled ABS / regenerated PMMA to 70:30 by weight ratio. The lamp housing was manufactured by injection molding the new ABS and the recycled ABS / regenerated PMMA mixture prepared by varying the amount of the new ABS added to 100 parts by weight of the material mixture.

Physical properties of the lamp housing specimens were measured by the method of the following test example, and are shown in Table 3 below.

Example 2

A recycled raw material obtained by recovering and crushing the waste direction indicator lamp system from the vehicle body discarded in the same manner as in the manufacturing example, and then removing only the metal component by magnetic screening, and adjusting the mixing ratio of recycled ABS / regenerated PMMA to 70:30 by weight ratio. The lamp housing was manufactured by injection molding the mixed material with the regenerated material prepared by varying the amount of the compatibilizer added to 100 parts by weight of the material mixture.

Physical properties of the lamp housing specimens were measured in the following test example, and are shown in Table 4 below.

Test Example

Physical properties of the lamp housings prepared according to Preparation Examples and Examples 1 and 2 were measured by the following method.

1. Tensile strength: measured by ASTM D638 method.

2. Modulus: Measured by ASTM D638 method.

3. Elongation: measured by ASTM D638 method.

4. Impact strength: measured by ASTM D256 method.

5. Heat resistance: measured by UL-94 method.                     

Compatibilizer * Tensile Properties (weight%) Strength (MPa) Modulus (MPa) % Elongation 0 61.3 1287 7.8 2 67.5 1341 8.6 5 68.6 1355 8.9 10 68.9 1362 9.4 15 69.2 1367 9.7 * SEBS-MA (maleic anhydride modified styrene ethylene butadiene styrene block copolymer)

As shown in Table 1, the tensile strength and modulus increased as the content of regenerated PMMA increased, but elongation and impact strength were weakened. This is because the effect of hard segment is greater as the content of PMMA increases.

In addition, as shown in Table 2, the heat resistance of the lamp housing using the recycled material manufactured according to the present invention is also excellent, and the tensile property and the impact strength are made of ABS as a component even when it is maintained at 150 ° C. for 30 days or more. It was found that the characteristics required for the housing were sufficiently satisfied.

As shown in Table 3, as the content of new ABS increased, the overall physical properties of the recycled ABS / PMMA system improved.

As shown in Table 4, when the 5% by weight of the compatibilizer is used as an additive, the tensile strength is low, and when the content exceeds 10% by weight, the effect of the additive is low.

The characteristics of the tension required for a housing made of ABS of the lamp system of a vehicle vary depending on the type and size of the vehicle to which the housing is applied, and the standards vary from manufacturer to manufacturer. The tensile strength required for the housing used is 65 MPa or more, the modulus is 1300 MPa or more, the elongation is 6% or more, and the impact strength is 3 kJ / m 2.

As shown in Table 4, the lamp housing made of the composition according to the present invention satisfactorily satisfies the above conditions and uses recycled materials, thereby greatly reducing the waste of automobiles and developing waste resources as excellent resources, thereby greatly contributing to environmental conservation. Economic effect can be obtained. By utilizing these improved properties, it can also be used as a raw material for automotive instrument panel base layers and radiator grilles.

Figure 1 is to separate the bulbs and wires in the waste direction indicator lamp system recovered from the vehicle body of the abandoned vehicle, and then crushed without removing the plastic components at the same time to remove only the metal components by magnetic screening method does not remove the hot melt and aluminum deposits It is a lamp housing manufactured using the recycled material of the present invention manufactured by the polymer blend method by introducing recycled ABS, recycled PMMA and new material ABS in the state.

2 is a schematic of a general automotive lamp system.

As described above, according to the method of the present invention in establishing a technology for recovering and recycling the plastic material of the lamp system, which is a waste generated in the waste vehicle, which is essentially increased with the development of the automobile industry, The recycling process can be shortened by separating and recovering the electric wire, easily separating only the metal material, and then simultaneously crushing and blending the plastic material.

In addition, it is possible to recycle the plastic raw materials of waste vehicles, which have not been used in the past, and to introduce them into new cars, thereby reducing the cost of processing oil resources and oil resources, contributing to the efficient distribution of resources, and disposing waste. Reductions can greatly contribute to the reduction of pollutant emissions and environmental preservation, which is a recent global concern.

In addition, there is an effect that can be applied to the recycling of plastic waste that is generated in large quantities in not only waste vehicle materials, but also waste electrical appliances.

Claims (8)

In the method of recycling after removing the metal component from the waste plastic material for automobiles, 1) at the collected waste lamp system, without separating the housing material and the lens material, which are plastic materials, and simultaneously crushing with the adhesive and the surface treatment material of the housing, and then removing metal components and foreign substances by magnetic screening; 2) The plastic component from which the metal component is removed in the first step is mixed with the ABS component of the housing and the PMMA component of the lens and simultaneously pulverized, and then the new ABS is mixed to adjust the ABS: PMMA mixing ratio to 60 to 80: 20 to 40 weight ratio. Preparing a adjusted recycled ABS / regenerated PMMA mixture; And 3) manufacturing an automobile lamp housing using the recycled ABS / regenerated PMMA mixture prepared in step 2 above; Waste lamp system for automobiles characterized in that comprises a recycling method of raw materials. The method of claim 1, wherein in the second step, one or more mixtures selected from a compatibilizer and a heat stabilizer are additionally included. delete delete The method of claim 2, wherein one or two or more mixtures selected from the compatibilizer and the heat stabilizer are added in an amount of 5 to 10 wt%. The method of claim 2, wherein the new ABS in the second step comprises 50 to 70 parts by weight based on 100 parts by weight of the composition consisting of a recycled ABS / recycled PMMA mixture and one or more mixtures selected from a compatibilizer and a heat stabilizer. A method of recycling raw material for a waste lamp system for a vehicle. A recycled resin composition, wherein a new ABS is produced by adding 50 to 70 parts by weight of new ABS based on 100 parts by weight of a mixture of recycled ABS / regenerated PMMA in a weight ratio of 60 to 80:20 to 40. 8. The recycled resin composition according to claim 7, wherein 5-10 wt% of one or two or more mixtures selected from a compatibilizer and a heat stabilizer is additionally mixed with the recycled ABS / regenerated PMMA and the new ABS mixture as a whole.

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