Conclusion is made that new spinning technology should be based on hi-velocity,hi-robotization,hi-automation,large package,wide application of raw material,seperation of twisting from winding,minimization of twisting trangle section,improvement of yarn structure,reduction of hairiness.

Contrast analysis is done to the domestic cotton spinning frame equipped with the self-developed centralizing device with double suction grooves for the cotton yarn of same fineness regarding yarn structure and property of yarn produced in compact-siro spinning process under the same condition.

However, the researching work on the spinning mechanism of compact spinning technology and its yarn structure is very little for its short developing history.

It also defines the main specification parameters such as yarn construction, yarn specification, fabric specification etc and their influence over the product style, product quality and production process and advances thc concrete ways of determining the fabric specification parameters.

Influence to the triangular area and yarn structure by tri-component spinning processing;

The spinning mechanism of MVS and the yarn structure are studied.

Throuth the study of the yarn structure , the main reason for this special structure is analysised ,and the corresponding measures for improving the quality of yarn is gotten, and provide the theoretical basis for improving the machinery and equipment sector to further enhance the friction yarn quality .

The yarn architecture of three dimensional (3 D) braided preforms produced by the four step 1×1 braiding technique has been studied by means of a control volume method in conjunction with experimental investigation.