Abstract
In this paper, relation between the changes of wool fiber diameter and length were theoretically analyzed and tested when it was drawn under different conditions. Studied results show that wool fiber diameter can be permanent reduced by drawing, generally, the fiber diameter can be reduced to around 0.80 times of that before drawing. The influence of drawing tension, drawing time and the pretreatment on the fiber elongation and the diameter were also discussed. After drawing, reduction of the fiber diameter in the lengthwise was tested. Results show that reduction of the fiber diameter was not the same in the lengthwise, reduction of the diameter at the position of large diameter is higher than that at the position of small diameter along the fiber, which is perhaps mostly due to the stress on the fiber cross-section not the same in the lengthwise.
