2007 Volume 53 Issue 4 Pages 151-157
In this paper, the helix number of hard twisted yarn was analyzed by both theory and experiment. The shape of hard twisted yarn was supposed as the helix and the helix number was examined from the dynamic balance of moment.
The results obtained are as follows:
1) Bending rigidity and twisting moment are strongly concerned in the deformation of hard twisted yarn.
2) The smaller the bending rigidity of hard twisted yarns, the larger the helix numbers of hard twisted yarn.
3) By increasing the twisted moment, the helix number of hard twisted yarns increases.
