Thermo-Setting of Coiled Yarns

Abstract

The experiment described in the following article has been made with a three-fold object: (1) to produce by thermo-setting a coiled mono-and a coiled multi-filament shaped polygonal or circular in the cross section, (2) to express quantitatively the degree of thermo-setting needed for that purpose and (3) to determine an optimum condition for the thermo-setting of such a mono- and multi-filament. The authors used saran, nylon 6, and terylene in their experiments.
These experiments have shown that:
(1) Even a slight difference in the degree of thermo-setting can be detected if we differentiate between the apparent and real degrees of thermo-setting and express the real degree by P_L, P_N and P_D.
(2) Mono- and multi-filaments set in a coild shape having a polygonal or circular cross section will have a fabric hand and cushion effect which will suit them for manufacture into textiles for certain purposes, including thermal insulation and filtering.