ポリエチレンテレフタレート繊維の高速紡糸-Melt-draw Ratioと質量吐出速度のおよぼす効果
1978 年 34 巻 2 号 p. T64-T71
詳細
1978 年 34 巻 2 号 p. T64-T71
In order to clarify the effect of the take-up velocity on the high speed melt spinning of PET, the filaments were spun at the take-up velocity 1, 000-7, 000m/min, and at the mass flow rate 7.2-22.3g/min. Two types of spinnerets (0.5mmφ, 4 hole and 0.25mmφ, 16 hole) were employed.
The effects of the melt-draw ratio and the cooling conditions on the fiber diameter along the spinning line were studied from the resultant textures of the spun filaments.
The following results are obtained.
(1) Under the high speed melt spinning, the take-up velocity plays a predominant role in the fiber structure formation, however, the mass flow rate also affects the fiber in its properties in some extent.
(2) The effect of mass flow rate could be explained as the cooling effect according to dicrease in the fiber diameter along the spinning line rather than as the effect of the draft ratio.
(3) As the birefringence of the fiber obtained by the spinning reaches to 0.062-0.068, the cristallinity is increased drastically.
