As seller, do you really know about PVC and the advantages of PVC and classification of PVC?

December 19, 2022

TDDchem.com

6167

Polyvinyl chloride, short for PVC. It is a white powder, belongs to thermoplastic resin. PVC used to be the most common plastic in the world, and it was widely used. PVC is widely used in building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foaming materials, sealing materials, fibers, etc.

Advantages of PVC

PVC has the advantages of flame retardancy (flame retardancy value is above 40), high chemical resistance (resistance to concentrated hydrochloric acid, sulfuric acid with concentration of 90%, nitric acid with concentration of 60% and sodium hydroxide with concentration of 20%), good mechanical strength and electrical insulation.

Classification of PVC

According to the different application, PVC can be divided into three types: universal PVC resin, high degree of polymerization PVC resin, cross-linked PVC resin. universal PVC resin is formed by polymerization of vinyl chloride monomer under the action of initiator; PVC resin with high degree of polymerization refers to the resin polymerized by adding chain growth agent in vinyl chloride monomer polymerization system; Crosslinked PVC resin is polymerized by adding a crosslinking agent containing dienes and polyenes in the vinyl chloride monomer polymerization system.

According to the method of gaining vinyl chloride monomer, PVC can be divided into calcium carbide method, ethylene method and imported (EDC, VCM) monomer method. (ethylene method and imported monomer method are commonly referred to as ethylene method).

According to polymerization methods, PVC can be divided into four categories: suspension PVC, lotion PVC, bulk PVC and solution PVC. Suspension PVC has the largest variety in production, accounting for about 80% of the total output of PVC. Suspension PVC is divided into six types according to the absolute viscosity: XS-1, XS-2... XS-6; XJ-1、XJ-2……、XJ-6. The meaning of each letter: X-suspension method; S-loose type; J-Tight type.

According to the content of plasticizer, PVC plastics are often divided into: non-plasticized PVC, plasticizer content is 0; rigid PVC, plasticizer content is less than 10%; semi-rigid PVC, plasticizer content 10-30%; soft PVC, the plasticizer content is 30-70%; polyvinyl chloride paste plastic, the plasticizer content is more than 80%.

Above, introduced about what is PVC, what is the advantages of PVC, classification of PVC, if you have any questions, pls feel free to contact us. Whatsapp: 8613051021551, or visit our website: www.tddchem.com to purchase materials you need and send inquiries or messages to us. We will help you select the material suit you and solve the problems as soon as possible. TDD is one-stop raw material procurement online store, welcome!

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