plastic raw materials-polypropylene granules/polypropylene polymer china pp plastic raw material
Dawn annual sales of plastic raw materials exceed 4 million tons, with a compound growth rate of over 20% in the past five years. It mainly engages in synthetic resin and rubber products such as general plastics and engineering plastics. Upstream has established deep strategic cooperation with PetroChina, Sinopec, ChinaCoal, Shenhua, Yanchang Oil, Sibul Russia and other major petrochemical companies at home and abroad. It operates more than 3600 trade brands and has won the honors of gold partner and excellent dealer of PetroChina, Sinopec, ChinaCoal and other petrochemical companies for many consecutive years. Downstream services are provided to customers in the entire field of plastics, with over 30000 users and over 30 branches nationwide, as well as over 200 warehouses, meeting customers' real-time procurement needs.
Specification
1. Polypropylene is an odourless, tasteless, non-toxic and lightweight granule or powder with a relatively low density (0.89-0.91g/cm3). 2. Polypropylene has a high melting temperature, good heat resistance, continuous use up to 120°C and can be sterilised at high temperatures. The melting point of homopolymer polypropylene is approximately 168°C and typical random copolymers have a melting point in the range of 145-151°C. 3. Polypropylene has excellent mechanical properties such as yield strength, tensile strength, impact strength, surface hardness, rigidity and abrasion resistance, as well as good transparency and surface gloss. 4. Polypropylene has good electrical insulation and a small dielectric constant. 5, polypropylene is not easy to absorb water, very easy to thermal oxidation and discolouration degradation, so polypropylene powder to add antioxidant system. 6, polypropylene has good resistance to stress cracking, in addition to strong oxidising agents and non-polar solvents, has a strong resistance to chemical erosion.
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