The polypropylene staple fiber is in the number of tensile sisters because the polypropylene is relatively light, so the same day, polyester is much higher than the polyester, and the polyester single strength is also higher, so the tensile smector is lower than the polyester.

After the stretching process and intensity relationship is stretched by polypropylene fibers, the increase in fiber power is mainly the result of the orientation of the fiber itself and the crystallinity increase. Generally, the number of draw ratios is increased and strong. It can be seen from the double-refractive index of the tensile wire and the uncondered wire, and the strength must also change, and the tensile temperature can also change the fiber strength, the same pull 4.3 times, The tensile strength of 30 ° C was 16.6 kg, while the tensile strength of 120 ° C was 21.2 kg, mainly the impact of crystallinity, and generally the crystallinity of the wire has stretched at 40% room temperature, which will reduce the crystallinity, and 120 ° C At the time of stretching, the degree of crystallinity is increased to 53%, on the other hand, at the same tensile factor, the tensile temperature is improved, and the degree of orientation is reduced, which is due to the shortened macrochemical relaxation time, so only the temperature is improved. The stretch of thepolypropylene staple fiber  is constant, and the fiber performance index cannot be improved.

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