抄録
It is known that considerable even yarn can be produced in wet spinning without drafting controller. In this report, the mechanism of wet drafting is investigated by applying some common methods of drafting analysis.
The results obtained are as follows:
1) The average drafting force in wet spinning is larger than in conventional dry spinning, but the variation of force is smaller, especially, in larger roller gauge. (Fig. 3, 4)
2) The weight reduction curves in wet spinning are independent of roller gauges as shown in Fig. 5, 6. It seems that the Perfect Drafting occurs in any drafting conditions.
3) The comparison with two kinds of spectrograms before and after drafting shows that drafting in wet spinning does not produce any Drafting Wave. (Fig. 8)
4) The sliver in wet drafting zone has higher and stabler density than in the conventional. It means that the motion of floating fiber in drafting zone is well controlled. (Fig. 10)
