Because the virgin fiber (winding wire) 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 to eliminate static electricity as much as possible, it is required to be short on polyester. The fibers are post-processed.

The post-processing steps are mainly:

Bundling, drafting, oiling, curling, heat setting, cutting and packing

Clustering - preparation

Drafting - increase the degree of orientation; increase in strength, decrease in elongation; decrease in heat shrinkage;

Oiling - spinning, textile processing requirements;

Curl - increase cohesion; feel improved;

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

Cut and pack - product specifications.

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