Polypropylene
is a polymer of propylenes by addition polymerization.
It is white waxy material, transparent and light in appearance.
Chemical formula is (C3H6) N, density 0.89 ~ 0.91g/cm3, flammable, melting point 189ºC, softening at 155ºC or so, the use of temperature range of -30 ~ 140 ºC.
Under 80ºC, it can resist the corrosion of acid, alkali, salt liquid and various organic solvents, and can decompose under the action of high temperature and oxidation.
Polypropylene
is widely used in the production of clothing, blankets and other fiber products, medical instruments, automobiles, bicycles, parts, pipelines, chemical containers, and also used in food and drug packaging
.