Melt spinning of special chips of poly(butylene terephthalate)-block-(tetramethylene oxide) was studied. The obtained fiber possesses rubber-like elasticity at room temperature. The basic properties of this elastomer fiber are fineness 1.7 dtex, tensile strength 3.35 cN/dtex, breaking extension 68%, and elastic recovery >95% at 15% elongation. A new type of elastomer staple fiber of this block-copolymer is successfully fabricated by a traditional production line for melt spinning.

中文翻译：

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熔融纺丝法制备聚对苯二甲酸丁二醇酯-嵌段-（四亚甲基氧化物）弹性体短纤维

研究了聚对苯二甲酸丁二醇酯-嵌段-（四氢呋喃）特殊切片的熔体纺丝。所获得的纤维在室温下具有橡胶状的弹性。这种弹性体纤维的基本特性是纤度为1.7 dtex，拉伸强度为3.35 cN / dtex，断裂伸长率为68％，伸长率为15％时的弹性回复率> 95％。这种嵌段共聚物的新型弹性体短纤维是通过传统的熔体纺丝生产线成功制造的。