Because the primary fiber (winding wire) of regenerated cotton staple fiber has low strength, elongation, high thermal shrinkage and poor hand feeling; Therefore, in order to enhance the practicability (applicability) of regenerated cotton staple fiber and eliminate static electricity as much as possible, it needs to be post processed.
The post-processing procedures are mainly:
Bunching, drafting, oiling, crimping, heat setting, cutting and packaging
Cluster - Preparation;
Drafting - improve orientation; Strength increases and elongation decreases; The thermal shrinkage decreased;
Oiling - Requirements for spinning and textile processing;
Curl - increase the holding force; Improved hand feel;
Heat setting - improve crystallinity; The thermal shrinkage decreased and the hand feeling improved; Strength increases and elongation decreases;
Cutting and packing - Product specification requirements.
The post-processing process of regenerated cotton staple fiber is indispensable, otherwise it will bring a certain negative impact on the finished polyester product. Therefore, the post-processing process of polyester staple fiber should be completed step by step in order to improve the quality and corresponding performance of the finished product.
[detailed explanation of production process in the production process of regenerated cotton staple fiber]
1、 Qinghua and coiling: pour the polyester staple fiber into the turntable to disrupt and combine the original regular fibers to form a coiled fiber block;
2、 Carding, slitting, the carding machine continues to carding and splicing large coiled fibers into small strips;
3、 Roving: the sliver fibers are adjusted to the required number by roving and spinning frame;
4、 Splicing: the splicing machine twists a single yarn into the required number of strands;
5、 Twisted and loose tube: the made strand is made into twisted yarn or bobbin for dyeing;
6、 Dyeing and sub packaging: dye according to the color required by customers, and deliver goods in tubes.
