Mechanical aspects of fibre spinning process in molten polymers
Mechanical aspects of fibre spinning process in molten polymers
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熔融聚合物中纤维纺丝过程的机械方面
DOI：
10.1007/bf01520325
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发表时间：
1960
影响因子：
--
通讯作者：
Krystyna Kȩdzierska
中科院分区：
文献类型：
--
作者：
A. Ziabicki;Krystyna Kȩdzierska
讨论了在粘性液体中纺丝的工艺过程，给出了连续纤维形成的条件。在纺丝过程中，无论是张力的降低，还是粘度的增加，都可以在不中断液流的情况下完成纤维的形成。第一个事件可以在某些特殊情况下观察到，例如，通过“引力自转”，即液体流在自身重量的作用下流动。工艺纺丝是基于第二种情况--粘度的大幅度增加和屈服应力的出现。测定了聚异氰胺、聚对苯二甲酸乙二酯和聚苯乙烯熔融纺丝纤维在纺丝过程中的流动直径分布。计算了速度旋转法和速度梯度旋转法之间的关系。研究了喷丝板喷孔直径、卷绕速度、流动强度和熔体温度对直径-纺丝路径曲线形状的影响。将在不同聚合物熔体上得到的结果与KastandElsaesser对纤维素溶液的结果进行了比较，表明无论纺丝工艺和聚合物的分子结构如何，纤维的形成都有一个共同的机制。
The process of spinning fibres in viscous liquids has been discussed and the conditions for continuous fibre formation have been formulated. The formation of fibres without a break of the liquid stream may be accomplished when either a decrease of tensile force, or an increase ofTroutonviscosity along the spinning way takes place. The first event may be observed in some special conditions, e. g. by “gravitational spinning” i. e. the flow of a liquid stream drawn by the force of its own weight. The technical spinning is based rather on the second condition-the strong increase of viscosity and an appearance of a yield stress.The stream diameter distributions along the spinning way have been determined for polycapronamide, polyethylene terephthalate and polystyrene melt-spun fibres. The velocity-spinning way and velocity gradient-spinning way relations have been calculated. The effect of spinneret orifice diameter, take-up velocity, flow intensity and melt temperature on the shape of diameter-spinning way curves has been investigated.The analogy between the results obtained on various polymer melts and those described byKastandElsaesserfor cellulose solutions suggests that the fibre formation has a common mechanism regardless of the spinning procedure and the molecular structure of the polymer.