What are the important factors to improve the quality of polypropylene staple fiber? Spinning temperature is one of the key factors, which is described in detail below.

Polypropylene staple fiber has a high spinning temperature (above 300 ° C), and the spinning temperature of various specifications varies greatly. Therefore, the selection and control of polypropylene staple fiber temperature is very important. The spinning temperature is controlled too high. In addition to the possibility of broken ends of the wool, the strength of the finished product will obviously decrease, and the post-stretching will be abnormal. If the control temperature is too low, in addition to hard head wires and melt cracks, the tensile properties will be deteriorated, and even stretching cannot be performed. It will be forced to reduce the draw ratio, or the shrinkage of the stretched wires will cause the finished product to be too large. Elongation is too large. In addition to empirical observation, spinning temperature control is mainly based on testing the viscosity average molecular weight of oil-free silk. In general, the thermal insulation zone has the greatest effect on polymer degradation. Therefore, changing the temperature of this zone will change the molecular weight of oil-free silk faster. Controlling the spinning temperature is one of the keys to the production of polypropylene staple fibers.

Polypropylene staple fiber uses polypropylene resin as the main raw material, and is made into colored and colorless fluffy fibers with a specified denier and length through processes such as melt spinning, drafting, curling, drying, setting, cutting, and packing.

Polypropylene staple fiber product performance:

1. Has superior moisture conductivity, flexibility, excellent web forming and combing, and excellent thermal adhesion.

2. High strength, strong curling elasticity, light weight, low melting point, good surface permeability, and better acid and alkali resistance than other fibers.

Polypropylene staple fiber is mainly used for needle punched carpets, automotive interiors, non-woven fabrics, ropes, decorative materials, medical and health supplies, and so on.