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[Chemical Knowledge]：Properties and Uses of Recycled Plastics

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The nature and use
of recycled plastics in the field of raw materials for chemical production
Abstract:

With the increasing awareness of environmental protection and the increasing scarcity of resources, the application of recycled plastics in the field of raw materials for chemical production is becoming more and more extensive. This paper introduces the nature of recycled plastics, classification, production process and its use in the production of chemical products, in order to promote the healthy development of recycled plastics industry, improve resource utilization, reduce environmental pollution.

1. Introduction

Recycled plastics refers to the processing of waste plastic products through certain processes and technologies to make them become plastic raw materials that can be used for production. With the society's emphasis on sustainable development, recycled plastics have gradually become an important choice in the field of chemical production raw materials.

2. the nature of recycled plastics

the nature of recycled plastics mainly depends on the type of original plastic, production process and the source and quality of waste plastic products. Generally speaking, recycled plastics have the following properties:

1. Physical properties: The color, transparency, toughness, hardness and other physical properties of recycled plastics may be different from the original plastics, but they usually meet certain requirements.
2. Chemical properties: The corrosion resistance, heat resistance, cold resistance, electrical insulation and other chemical properties of recycled plastics retain the characteristics of the original plastic to a certain extent.
3. Environmental protection: The production process of recycled plastics can reduce the impact of waste plastic products on the environment and improve the utilization of resources. Classification and

of

3. recycled plastics According to different sources and production processes, recycled plastics can be divided into the following categories:

1. polyester recycled plastics: such as PET recycled plastics, mainly used in the production of fibers, films and packaging containers.
2. Polyethylene recycled plastics: such as HDPE, LDPE recycled plastics, widely used in the manufacture of pipes, cables, containers, etc.
3. Polypropylene recycled plastics: such as PP recycled plastics, commonly used in the production of auto parts, household appliances and so on.
4. PVC recycled plastics: such as PVC recycled plastics, can be used to make pipes, profiles, wires and cables.

4. the production process of recycled plastics

The production process of recycled plastics mainly includes the following steps:

1. Collect waste plastic products: collect waste plastic products through recycling stations, garbage classification, etc.
2. Cleaning and classification: Clean the collected waste plastic products, remove oil and other impurities, and classify them according to the type.
3. Crushing and granulation: The classified waste plastic products are crushed to form fragments of a certain size, and then granulated to form recycled plastic particles that can be used.
4. Modification treatment: According to the needs, the recycled plastic particles are modified to improve their performance and quality.

5. the use of recycled plastics in the production of chemical products

recycled plastics in the production of chemical products is widely used, the following lists several major areas:

1. packaging industry: recycled plastics can be used in the production of packaging bags, packaging boxes, caps and other packaging materials, reduce costs, improve the utilization rate of resources.
2. Building materials industry: recycled plastics can be used to manufacture pipes, profiles, plates and other building materials, with light weight, high strength, corrosion resistance and other advantages.
3. Automotive industry: Recycled plastics can be used to produce auto parts, such as bumpers and seats, to reduce body weight and improve fuel economy.
4. Home appliance industry: Recycled plastics can be used to manufacture the shell and parts of household appliances to improve the environmental protection and economy of products.

6. conclusion

recycled plastics as an important resource in the field of chemical production raw materials, has broad application prospects. By strengthening technological research and development and innovation, improving the quality and performance of recycled plastics will help promote the sustainable development of the chemical industry, promote the recycling of resources, and reduce environmental pollution.

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