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 polypropylene staple fiber spinning temperature control is too high, except for the possibility of filament breakage, etc., the main performance 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 polypropylene staple fiber short-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.

Hai'an County Qinfeng Chemical Fiber Co., Ltd. relies on the professional power of single stream, the front-end quality inspection system and perfect quality inspection system ranks among the high-quality enterprise queues in the industry, specializing in the production of short pp, polypropylene staple fiber, polyester staple fiber and functional polypropylene. Fiber, etc.

For more product information, please contact: Mr. Qian 13962787918, 13813743991 Website: http://www.haqfhx.com/