What is polyester staple fiber?

Polyester staple fiber is a fiber obtained by polymerizing polyester (polyethylene terephthalate, PET) by PTA and MEG and spinning into tow after cutting. PET is in the form of rice grains and has various varieties. 75% is used for polyester for chemical fiber. According to the requirements of the textile industry, Polyester staple fiber  and polyester filament are manufactured.

The products are mainly used in the cotton spinning industry, spinning alone or blended with cotton, viscose fiber, linen, wool, vinylon, etc. The resulting yarn is mainly used for clothing weaving, and can also be used for home furnishing fabrics, packaging cloth, filling and Warm material.

Because the nascent fiber (winding yarn) of polyester staple fiber has low strength, large elongation, high heat shrinkage rate, and poor hand feeling; therefore, in order to enhance the practicality (applicability) of polyester staple fiber  and eliminate static electricity as much as possible, it is necessary to The fiber undergoes post-processing.

The main post-processing procedures are:

Bunching, drawing, oiling, crimping, heat setting, cutting and packing

Clustering-preparation;

Drafting-increase the degree of orientation; increase in strength and decrease in elongation; decrease in thermal shrinkage;

Oiling-spinning and textile processing requirements;

Curl-increase cohesion; improve hand feeling;

Heat setting-increase crystallinity; decrease heat shrinkage rate and improve hand feeling; increase strength and decrease elongation;

Cutting and packing-product specification requirements.

The post-processing process of polyester staple fiber is indispensable, otherwise it will have a certain negative impact on the polyester product. Therefore, for the quality of the finished product and the corresponding performance, the post-processing procedures of polyester staple fiber must be completed step by step.