To overcome the spun yarn unevenness deterioration and insufficient hairiness reduction for ring spinning with a static contact surface, this study introduced a modified method to improve spun yarn properties by contacting the spinning strand with the static rod and self-adjustable disk surfaces. The mechanism of the improvement of spun yarn properties was theoretically analyzed. Analysis results indicated that the combination of the static rod and self-adjustable disk surfaces could improve the yarn hairiness wrapping force without sever twisting blockage, resulting in a large yarn hairiness reduction and surface tight structure without irregularity deterioration. Correspondingly, the yarn tenacity should also become somewhat enhancement. Then, our theoretical analysis and prediction were validated by conducting such comparative experiments as spinning without a contact surface, spinning with a static rod surface, and spinning with a combination of the static rod and self-adjustable disk surfaces. The experimental results were in good agreement with our theoretical analysis and prediction.
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