Abstract
We have studied the utility of radiant ray (infra-red ray) for the heater of the false-twist texturing machine. The previous article referred to the relation between the degree of heat- setting of yarns and electric power consumption in the processing of textured yarns, and showed the characteristics of the infra-red ray heater.
The present article discusses the physical and mechanical properties of specimens treated with both IR-ray and non-IR ray. Non-IR ray treatment is accomplished by the same heater as IR-ray treatment. The inner surface of the heater is covered with Al foil to shut off IR-ray.
The specimens used in our experiment were uniform in length or subjected to various drawings.
The results obtained are;
(1) The same temperature effect is obtained by IR-ray treatment in 35-40°C lower temperature range than the one by non-IR ray treatment.
(2) The rate of drawing has a slighter bearing on yarn than with the heat treatment temperature particularly by IR-ray treatment.
(3) Crystallization is promoted in specimens treated with IR-ray, and it is believed from DTA curves and photographs of small-angle X-ray scattering that the distribution of crystal size varies.
