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[Chemical Knowledge]：Properties and Uses of Recycled PET

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The nature and use
of recycled PET in the field of raw materials for chemical production
1. Introduction

With the continuous development of science and technology, human beings pay more and more attention to environmental protection and sustainability. In the field of chemical production raw materials, recycled PET has gradually become an important material. This article will detail the properties and uses of recycled PET.

2. properties of recycled PET

1. physical properties: recycled PET is a transparent, amorphous thermoplastic polymer, with high strength and hardness, and good dimensional stability. It has a density of about 1.3-1.4g/cm³, a melting point range of 240-260°C and a glass transition temperature of about 70°C.
2. Chemical properties: Recycled PET has good chemical resistance and can resist the erosion of most organic solvents, acids, alkalis and other chemicals. However, in the environment of strong acid and alkali, its properties may change.

3. the use of recycled PET

1. chemical raw materials: recycled PET can be used as the basis for the production of chemical raw materials, such as for the production of polyester chips, polyester fiber, polyester film and so on. These products are widely used in textile, packaging, electronics and other fields.
2. Environmental protection materials: Because recycled PET is recycled from discarded PET plastic bottles, it is also an environmentally friendly material. In today's green and environmental protection, recycled PET has been widely used in building materials, furniture manufacturing and other fields.
3. Food packaging: Recycled PET has good food hygiene, so it can be used in the field of food packaging. Such as water cup, oil bottle, seasoning bottle, etc.

4. Recycled PET Production Process

Recycled PET Production process mainly includes the following steps:

1. Waste classification: The collected PET waste is classified to remove non-PET materials such as metal and paper.
2. cleaning: cleaning the classified PET waste to remove the oil, dust and other impurities.
3. Fragment: The cleaned PET waste is processed into fragments to facilitate subsequent processing.
4. Melt pelletization: The flake PET waste is added to an extruder, heated and extruded to form PET pellets.

the advantages and prospects of 5. recycled PET

recycled PET as an environmentally friendly and sustainable raw material for chemical production has the following advantages:

1. Resource conservation: recycled PET uses waste PET plastic bottles and other waste materials to realize the effective use of resources and save the cost of raw materials.
2. Environmental protection: The production process of recycled PET reduces the generation of waste and reduces the pressure on the environment, which is in line with the current environmental protection trend.
3. Economy: The production cost of recycled PET is relatively low, which can improve the economic benefits of enterprises.

As people pay more attention to environmental protection and sustainability, the prospect of recycled PET is very broad. In the future, recycled PET will be used in more fields, such as automobiles and electronics. At the same time, with the continuous advancement of technology, the production process of recycled PET will also be optimized to improve production efficiency and quality.

6. conclusion

recycled PET as an environmentally friendly and sustainable raw material for chemical production has a wide range of uses and obvious advantages. In the future development, recycled PET will continue to play an important role in promoting the green development of the chemical industry.

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