Drawing Behavior of Nylon 6 Filaments

Load-elongation (L-E) curves of undrawn and drawn nylon 6 filaments were plotted on the same abscissa to investigate their drawing behaviors. The results are:1. The elongation of drawn filaments at the primary yield point was almost the same as the draw ratio of the filament.2. Filament drawn at slow extension rate had a higher effective draw ratio due to a higher degree of molecular orientation than drawn at high speed.3. The longer the drawn filament relaxed at a given draw ratio, the higher the degree of molecular orientation and the larger the shifts of the primary yield point, as if the equivalent higher draw ratio were applied.