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首页> 外文期刊>Journal of Applied Polymer Science >Studies on high-speed melt spinning of noncircular cross-section fibers.I.Structural analysis of As-Spun fibers
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Studies on high-speed melt spinning of noncircular cross-section fibers.I.Structural analysis of As-Spun fibers

机译：非圆形截面纤维的高速熔体纺丝研究I.初纺纤维的结构分析

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Flat fibers and hollow fibers were prepared through the high-speed melt spinning of poly(ethylene terephthalate) (PET), and the structures of these fibers were compared with those of circular fibers. The cross-sectional shape of each fiber changed to a dull shape in comparison with that of the respective spinning nozzle. The change in the cross-sectional shape was slightly suppressed with an increase in the take-up velocity. There was a significant development of structural variation in the cross section of fiat fibers in that the molecular orientation and crystallization were enhanced at the edge. Despite the difference in the cross-sectional shape, the structural development of fiat, hollow, and circular fibers with increasing take-up velocity showed almost similar behavior. Considering that the tensile stress at the solidification point of the spin line is known to govern the structure development of high-speed spun PET fibers, it was speculated that the effects of the enhancement of cooling and air friction on the tensile stress at the solidification point cancel each other.
机译：通过聚对苯二甲酸乙二醇酯（PET）的高速熔融纺丝制备扁平纤维和中空纤维，并将其与圆形纤维的结构进行比较。与相应的纺丝喷嘴的横截面形状相比，每根纤维的横截面形状均变钝。随着卷取速度的增加，横截面形状的变化被轻微抑制。扁平纤维横截面的结构变化有了显着发展，其分子取向和结晶在边缘得到增强。尽管横截面形状有所不同，但扁平纤维，中空纤维和圆形纤维的结构发展却随着吸收速度的提高而表现出几乎相似的行为。考虑到已知纺丝凝固点的拉伸应力决定着高速纺制PET纤维的结构发展，据推测，冷却和空气摩擦的增强对凝固点拉伸应力的影响互相抵消。

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