Nature: IPP by melt spinning fibers made of polyolefin. Also known as polypropylene. Spinning IPP regulatory requirements for more than 95% of molecular weight 10 to 300, 000, Melt temperature of 165 ° C to 175. With the speed of crystallization temperature change, Rapid crystallization temperature of 125 ~ 135 ° C, high polymer crystallization.

Glass transition temperature 0 to -20 ° C, fiber density variations due to crystallization vary, α Variant is monoclinic density 0.963G/cm3, β Is a variant of the six-party crystal density 0.939g/cm3, to the six-party variant is a quasi-crystal density 0.88g/cm3. Fiber low moisture absorption rate (< 0.03%) Dyeability worse, Intensity 2 ~ 8cN/dtex. IPP using directional ligand polymerization.

Polymerization method slurry polymerization, gas polymerization, Solution polymerization and bulk polymerization. Catalyst Al (C2H5) 3-TiCl3 and efficient catalysts. Silk fibers, short fibers, nonwoven fabrics, Flat yarn and fiber membrane bifida. For textiles, medical and health care, Civil engineering, agriculture, transport and industrial enterprises.