1999 Volume 40 Issue 12 Pages 792-799
This paper aims to make clear the influence of the hygroscopicity on thermal properties of pantyhose. The heat and water transfer properties of a prototype pantyhose, in which hygroscopic cupraammonium rayon filament yarns are mixed, have been examined as compared with those of usual pantyhose made of nylon filament yarns.
The results obtained are as follows:
1) The dry heat loss (Hd) is closely related to structural properties (thickness T, weight W, and stitch density Sd) of pantyhose. Hd is able to be predicted accurately by using a regression formula in terms of W and Sd as variables.
2) The moisture transfer rate (Wn) of pantyhose, in which cupraammonium rayon filament yarns are mixed, is about 30% higher than that of nylon pantyhose in the test simulating insensible perspiration condition. Wn is able to be predicted by using a regression formula in terms of regain (R), W and Sd as variables.
3) The pantyhose, in which cupraammonium rayon filament yarns are mixed, is higher in wet heat loss (Hws) and is also shorter in the duration of drying time (t) than those of nylon pantyhose in the test simulating sweating condition. Hws is able to be predicted by using a regression formula in terms of water absorption area (Ab), R and Sd.
