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[Chemical Knowledge]：What are the upstream raw materials of PTT? What are the downstream products?

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In the field of chemical production raw materials, PTT (poly (trimethylene terephthalate)) is an important polyester material. It has a wide range of upstream and downstream related products, involving many fields. The following describes in detail the upstream and downstream associated products of PTT.

upstream related products

1. Terephthalic acid (PTA)

Terephthalic acid is one of the main raw materials of PTT and is used to produce dimethyl terephthalate (DMT), the monomer of PTT. The production process of PTA involves steps such as oxidation reaction and crystallization, and its raw material is mainly p-xylene (PX).

2. Propylene Glycol (PG)

Propylene glycol is another important raw material for PTT, which reacts with terephthalic acid to form PTT. The main production methods of propylene glycol are propylene oxide hydrolysis method and propylene direct oxidation method.

downstream related products

1. Fiber

PTT fiber is a high-performance polyester fiber with excellent elasticity, recovery, wrinkle resistance and dyeing. It can be used in the production of textiles, clothing, industrial fabrics and other fields.

2. Film

PTT film has the advantages of high strength, high toughness, heat resistance, cold resistance, etc., and can be used in packaging materials, capacitor films, insulating materials and other fields.

3. Engineering plastics

PTT can be used as engineering plastics, with excellent mechanical properties, heat resistance, chemical resistance, etc. It can be used to manufacture auto parts, electronic and electrical parts, mechanical industrial parts, etc.

4. Bottle grade PTT

Bottle grade PTT has excellent transparency, heat resistance, cold resistance and mechanical properties, and can be used to produce food, beverage, medicine and other packaging containers.

summary

PTT as an important polyester material, its upstream and downstream related products are extensive, involving many fields. Upstream related products mainly include terephthalic acid and propylene glycol, while downstream related products include fibers, films, engineering plastics and bottle-grade PTT. These products have a wide range of applications and play an important role in promoting the development of the chemical industry.

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