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[Chemical Knowledge]：Properties and Uses of PET

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PET(Polyethylene Terephthalate) is a high molecular compound, belonging to polyester polymers. In the field of chemical production raw materials, PET has excellent properties and a wide range of uses. This article will detail the properties and uses of PET.

1. PET properties

1. Physical properties
PET is a colorless, transparent, shiny plastic material with high hardness and strength. It has good impact resistance and can maintain its mechanical properties in a wide temperature range. In addition, PET also has excellent chemical resistance and can resist the erosion of many organic solvents and chemicals such as acids and bases.

2. Thermal Properties
PET has a higher glass transition temperature (Tg) and melting point (Tm), and therefore has better thermal stability. It can be processed at high temperatures, but it should be noted that long-term exposure to high temperatures will cause PET to decompose.

3. Electrical properties
PET has high insulation resistance and electrical strength, so it is widely used in the field of electrical insulation.

2. the use of PET

1.
PET packaging field As an excellent packaging material, it is widely used in food, beverage, medicine, cosmetics and other fields. Because of its good transparency, chemical resistance, barrier properties and mechanical properties, it is used to make various packaging containers, such as bottles, cans, boxes, etc.

2. fiber field
PET fiber is called polyester, is a kind of synthetic fiber. Because of its good elasticity, wrinkle resistance, abrasion resistance and dyeing properties, it is widely used in textiles, clothing and other fields.

3.
in the field of engineering plastics As an engineering plastic, PET is widely used in the manufacture of various mechanical parts, electronic and electrical components, auto parts, etc. Because of its good mechanical, thermal and electrical properties, it is used to replace some traditional metal materials.

4.
in the medical field As a biocompatible material, PET is widely used in the medical field, such as the production of medical devices, artificial joints, dental materials, etc.

In short, PET, as an excellent raw material for chemical production, has been widely used in various fields. Because of its stable nature, convenient processing, low price and other advantages, PET has become a popular chemical material.

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