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 short fiber temperature is very important. Spinning temperature control is too high, except for the possibility of yarn breakage, etc., mainly showing that the strength of the finished product will be significantly reduced, and the post-stretching will be abnormal. If the control temperature is too low, in addition to the occurrence of hard filaments, melt cracks, the tensile properties may be deteriorated, or even stretched, forced to reduce the draw ratio, or the stretched yarn shrinkage is too large to cause the finished product. The elongation is too large. In addition to empirical observation, the spinning temperature control mainly relies on testing the viscosity average molecular weight of the oil-free wire. Under normal circumstances, the great influence on the degradation of the polymer is the heat preservation zone. Therefore, changing the temperature of the zone changes the molecular weight of the oil-free wire faster, and controlling the spinning temperature is one of the key factors for producing polypropylene staple fiber.

Polypropylene staple fiber is made of polypropylene resin as the main raw material, and is made into a colored and colorless, specified denier and length fluffy fiber through melt spinning, drawing, crimping, drying, setting and cutting, and packaging.

Polypropylene staple fiber product performance:

1. It has excellent moisture permeability, flexibility, and is excellent in web forming and combing and thermal adhesion.

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

Polypropylene staple fiber is mainly used for needle-punched carpets, automotive interiors, non-woven fabrics, ropes, decorative materials, medical and hygiene products, and the like.