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[Chemical Knowledge]：Properties and Uses of Recycled Polyester

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The nature and use
of recycled polyester
1. Introduction

recycled polyester is an important raw material for the production of chemical products, widely used in textiles, plastics, packaging, construction and other fields. With the increasing concern about environmental protection and sustainable development, recycled polyester has gradually become an important alternative to traditional petrochemical raw materials. The purpose of this paper is to explore the properties and uses of recycled polyester, and to provide reference for the production and research in related fields.

2. the properties of recycled polyester

1. Physical properties: Recycled polyester usually presents transparent or translucent particles or powder, with good thermal stability, mechanical properties and processing properties. Its density is usually between 1.1-1.4g/cm³ and its melting point is between 220-260°C.
2. chemical properties: recycled polyester has good acid resistance, alkali resistance, oil resistance and organic solvent resistance, but not high temperature hydrolysis and strong oxidant.

3. the use of recycled polyester

1. Textile field: Recycled polyester has a wide range of applications in the textile field, mainly for the production of recycled polyester fiber. This fiber has excellent elasticity, wrinkle resistance and shape retention, and can be used to make clothing, bedding, plush toys, etc.
2. Plastic field: Recycled polyester can be used to produce various plastic products, such as beverage bottles, food packaging, household appliances shell, etc. Due to its good mechanical properties and processing properties, recycled polyester has high application value in the field of plastics.
3. Packaging field: Recycled polyester can be used to make various packaging materials, such as films, packaging bags, containers, etc. Its excellent acid resistance, alkali resistance and oil resistance make recycled polyester have a wide range of applications in the field of packaging.
4. construction field: recycled polyester can be used as building materials for heat preservation, sound insulation, waterproof and so on. Due to its good environmental performance and sustainability, recycled polyester has gradually received attention in the construction field.

the production process of 4. recycled polyester
The production process of
recycled polyester mainly includes the steps of waste polyester recycling, cleaning, drying, melting granulation and so on. Waste polyester mainly comes from waste textiles, plastic products, etc., and is converted into reusable recycled polyester raw materials through certain treatment processes.

5. the development prospects of recycled polyester

With people's increasing attention to environmental protection and sustainable development, the development prospects of recycled polyester are very broad. In the future, recycled polyester will be more widely used in textiles, plastics, packaging, construction and other fields, and become an important choice to replace traditional petrochemical raw materials. At the same time, with the continuous progress of technology, the production process of recycled polyester will be more environmentally friendly and efficient, and the product quality will be further improved.

6. conclusion

recycled polyester as an important raw material for chemical production has a wide range of uses and good prospects for development. Through the in-depth discussion of the nature and use of recycled polyester, it can provide reference for the production and research in related fields, and promote the sustainable development of recycled polyester industry.

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