抄録
The effects of several treatment on twist moment of polycaproamide (Amilan) mono-filament are measured.
The heat-treatment with 20% extension affects the increase in twist moment, but the heat-set without restriction affects the decrease in moment.
Although the phenomena are inconsistent with those of J. J. Mertens, the results may fully be explained by the theory advanced in the previous paper.
By the heat-treatment with extension of the filament, the crystallites are subdivided and packed closely, so that the crystal slippage becomes difficult, while the crystal growth in the heat-set without restriction affects easy slippage and relaxes the twist moment.
When the sample is simply stretched to its breakage the fiblization of fiber is progressed and its twisting behaviour has resemblance to that of multi-filament yarn.
