Abstract
In order to investigate the effects of heat on the load-elongation phenomenon and filament breaking for nylon 6 monofilaments, the generation of heat using three types of monofilament elongation was estimated using a thermography apparatus. The filament diameter was 0.76 mm and the elongation speed was 8.3 %/s. In a simple elongation, the filament temperature rose on the center and was 38 °C higher than the room temperature at breaking. Forty-five percent of elongation energy was converted into heat and 18% was stored with strain energy. In a loop elongation, filaments were heated at the loop points and the temperature rose 17.5 °C at breaking. In a knot elongation, filaments were heated only on the knot points and the temperature rose 39 °C. Nylon filaments generated heat through elongation and heat was stored, due to the non-conductive properties of the filaments. Heated points were softened and filaments were broken on those points. Heat was not the main cause of breaking, although it induced and facilitated breaking.
