[what is polypropylene]
polypropylene
Polypropylene fiber is a Chinese name for the synthetic fiber, which is made from petroleum refining. Also called polypropylene fiber. The raw materials are abundant, the production process is simple, the product price is lower than other synthetic fiber. Physical and mechanical properties of the fiber is characterized by: high intensity (short fiber for 4 ~ 6 g/denier, / denier filament is 5 ~ 8 g), wet strength and dry intensity is basically the same, the proportion of small (0.91), wear-resisting corrosion resistance, etc. The annual output of world polypropylene fiber has exceeded 1 million tons in 1980.
explain
Scientific name of polypropylene fiber, near flame namely shrinkage, flammable, burning slowly and smoke from the fire, flame upper yellow, bottom, blue emitting oil smell, burning ashes as hard round fawn particles, after hand twist is fragile. It is made from propylene through polymerization and melt spinning. The production of polypropylene, which officially began in 1957, is a rising star in synthetic fibers. Because of the simple production process of polypropylene, low price, high strength, relatively low density and other advantages, polypropylene develops rapidly. It is now the fourth largest of synthetic fibres, the lightest fiber in common chemical fibers. The production of polypropylene includes staple fiber, filament and split film fiber. The polypropylene film is made of polypropylene, which is then stretched to split into a network of the original fiber.