Polypropylene staple fiber is made from polypropylene by melting, drawing, spinning, cutting and other processes.

Polypropylene staple fiber looks like cotton ball from the outside, soft and elastic, polypropylene staple fiber elongation performance is large, production control is not good, elongation of 60%. In addition to the structural elements of the polypropylene polymer itself, there is also the possibility of insufficient stretching during the production process. Due to the large non-uniformity of the yarn, it is easy to finish the winding when increasing the tensile ratio, and sometimes it will drag the foot and then withdraw the winding. In the production, it was found that the yarn shrinkage between the second and the third drawing machine during parking made the three five-roll reversals, and the internal stress of the fibers after orientation was large and there was shrinkage, which could be improved by tension heat setting or appropriate heat treatment.

Polypropylene staple fiber according to natural fiber specifications can be divided into cotton type, wool type, carpet type and medium long type of short fiber. They can be spun either pure or blended with different proportions of natural fibers and other fibers into yarn strips, fabrics, and felt. For example, the general grade of asphalt carbon fiber is mixed in a ratio of 8:2 to carbon fiber with a length of 150mm, a diameter of 15m, a strength of 800MPa, and a modulus of 41GPa, and the reinforcement of composite materials such as cement and magnesium aluminum alloy uses fabrics and short fibers woven into various shapes.

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