How is high-strength PP fiber produced?

High-strength PP fiber is usually produced by melt spinning. Polypropylene resin is added to a vertical or horizontal screw extruder for heating and melting, extruded from a spinneret through a metering pump, and cooled into fibers in the air.

The characteristics of high-strength PP fiber melt spinning are: ① generally use single-head equal-pitch screw extruder. In order to adapt to the characteristics of high viscosity and poor fluidity of fiber-forming polypropylene melt, the screw compression ratio is larger, the smaller is 2.8, metering The segment is as short as possible, and the screw length-diameter ratio ranges from 20 to 26. ② Due to the large molecular weight, the melt temperature during spinning is generally higher than the melting point by ~ 130 ℃, and methods such as adding molecular weight regulators can also be used to reduce the spinning temperature. ③The crystallization speed is faster during the cooling molding process, and the cooling temperature should be slightly lower.

Shandong Huimin Zhiwei Chemical Fiber Products Co., Ltd. was established in 2003. It has developed into a professional large-scale polypropylene chemical fiber company that integrates production and sales. The main products are: polypropylene yarn, polypropylene yarn, polypropylene medium-strength yarn, polypropylene high-strength yarn , high-strength PP fiber, polypropylene rope, safety net, polypropylene engineering fiber, polypropylene mesh fiber, polyester fiber.