The traditional technologies,improved ring spinning techniques and new spinning techiques to reduce yarn hairiness were introduced, and the different technology and spinning technique have been briefly analysed from the viewpoints of hairiness reduction and cost, which can be used for refernce of the mills to select the appropriate methods to reduce yarn hairiness.

Research of Reducing Ring Spinning Hairiness by Using Hydrocyclone;

The Trial Research of Shorting the Process of Ring Spinning;

The properties of the yarn structure and its fabric style produced by compact spinning and traditional ring spinning are com- pared through experiments by use of microphotograph and fabric style tester and related effective factors are also analyzed, thus provided some basis for compact spinning product development and positioning.

New system for optimizing cop change procedure in ring spinning;

Yarn forming quality comparison of compact spinning against ring spinning;

Migration mechanism of fibers and their movement analysis in the twisting triangular space of ring spinning;

In new type ring frames, elastic members and balancing cams are used to replace the traditional dead weights for the balancing of the ring rails and other lifting parts.