Polypropylene staple fiber is a synthetic fiber made of isotactic polypropylene obtained from propylene polymerization, known as polypropylene in China.

Polypropylene staple fiber is generally divided into monofilament and mesh two specifications, its physical properties are basically the same. That is, polypropylene fiber is insoluble in water, tasteless, non-toxic, density is about 0.91g/75px, melting point is about 160℃, fire point is about 580℃, good heat resistance, good electrical conductivity, low thermal conductivity, acid and alkali resistance is very high. In order to improve the surface adhesion between fiber and concrete, the fiber surface is treated with special technology.

The melting point of polypropylene staple fiber is low (165 ~ 173℃), and the light and heat stability is poor, so the heat resistance and aging resistance of polypropylene fiber are poor. Usually, heat stabilizer and anti-aging agent are added to improve its performance. Its hygroscopic and dyeing property is the worst among synthetic fibers, the moisture recovery rate is less than 0.03%, ordinary dyes can not make it colored, so in the spinning of raw materials polypropylene add a certain amount of coloring masterbatch to make the fiber colored.

The production process of polypropylene staple fiber mainly adopts porous, low speed and continuous process, that is, short spinning process. Polypropylene staple fiber and cotton blend, can be made into c cotton muslin, bed sheets, namely fiber and viscose blend can be made into blankets, polypropylene pure spinning and wool yarn blending, polypropylene blankets, polypropylene cotton smoke filter. The fiber thickness of sanitary products is 1.5-2.5dtex, and the fiber thickness of floor fabrics is 5-10 dtex. The length of an optical fiber ranges from 1.5 mm to 200.0 mm depending on the purpose of the optical fiber. Staple fiber lengths are 1.5-200.0 mm for concrete, 40.0 mm for diapers, and 60.0 mm for floor fabrics.

Hai'an County Qinfeng Chemical Fiber Co., Ltd. specializes in production and sales：polypropylene staple fiber, Polyester Staple Fiber, functional polypropylene short fiber, functional polyester staple fiber, hydrophilic polyester staple fiber,  polypropylene, PP staple fiber, polyester staple fiber.