PURPOSE: The titled monofilaments, produced by melt spinning a polyester consisting essentially of polybutylene terephthalate, having a specific tensile modulus and change of tensile elongation with time and improved fatigue resistance, and useful as brush bristles, etc.
CONSTITUTION: Polyester monofilaments, produced by melt spinning a polyester consisting essentially of polybutylene terephthalate through a spinneret into water, etc., cooling the extruded filaments, drawing the resultant solidified filaments in hot water, etc. in many stages, and passing the drawn filaments through a hot air furnace, and having 60W100% tensile elongation at 25% and 0W1 change (A) of tensile elongation with time under 5kg/cm2 stress expressed by the formula [A is change of tensile elongation with time; t1 and t2 are elapsed time (hr); 1 is the elongation (%) after the lapse of t1(hr); 2 is the elongation (%) after the lapse of t2(hr)].
NAKANISHI JIYUUMEI
NAKANISHI TOYOROU
| JPS4966916A | 1974-06-28 | |||
| JPS5010355A | 1975-02-03 |