For different purposes, the main main contents are: core yarn for garment, core yarn for elastic fabric, core yarn for decorative fabric, and core yarn for sewing thread. There are several spinning methods of core spun yarn: ring spinning, electrostatic spinning, eddy current spinning, self twisting and so on. At present, the ring spinning is widely used in the cotton spinning industry in China.
Taking polyester cotton core yarn as an example, there are two kinds of process steps for spinning core spun yarn.
Comb process:
Cotton thread: a carding of pure flowers - ROVING - yarn.
Carding system:
Cotton thread: a carding thread, a roll, a combing, and a two one and three one roving and a yarn (core).
In practice, the selection of the process steps of core spun yarn should be made according to the yarn specification and the number of twists. The general principle is that the coarse comb can be used without combing; If combing system is to be used, the process can be shortened and production cost can be reduced. If the number of combed cotton strips is not uniform in some manufacturers, the straightness and parallelism of the fibers are better, and the strip can be coated after one pass. Therefore, the following processes can be used:
Cotton thread: a carding of cotton thread, a roll of combed, a thread of roving (core).
