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[Chemical Knowledge]：What are the upstream raw materials of polyester? What do the downstream products contain?

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Polyester is a synthetic fiber that is widely used in the production of textiles, clothing and chemicals. The upstream and downstream related products of polyester mainly include petroleum, petrochemical products, monomers, polymers, spinning dope, polyester fibers and textiles. The upstream products of

polyester are mainly petroleum and petrochemical products. After a series of cracking, separation and polymerization reactions, the raw materials for polyester production are obtained, such as ethylene and propylene. These raw materials are then subjected to oxidation, esterification, polycondensation and other reactions to obtain polyester polymers. The downstream products of

polyester are mainly polyester fibers and textiles. Polyester fiber can be processed into various specifications of tow and fabric through spinning process, widely used in clothing, home textiles, industrial textiles and other fields. At the same time, polyester can also be blended or interwoven with other fibers to improve the performance and quality of textiles.

In addition, the upstream and downstream related products of polyester also include some auxiliary materials and additives, such as dyes, additives, antistatic agents, etc. These products play an important role in the production and processing of polyester.

In short, the upstream and downstream related products of polyester are very extensive, involving many fields, such as petroleum, petrochemical, textile, chemical and so on. The production and processing of these products are interrelated and interdependent, and together constitute a complete system of the polyester industry chain.

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