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PET/PTT复合纤维卷缩性能的研究 总被引：5，自引：3，他引：2
通过对不同线密度的聚对苯二甲酸乙二醇酯/聚对苯二甲酸丙二醇酯(PET/PTT)复合纤维的热收缩率、卷曲收缩率、卷曲模量及卷曲稳定度的测试,研究了干热和沸水处理条件下的PET/PTT复合纤维的卷缩性能。结果表明:干热处理时,PET/PTT复合纤维的热收缩率随温度的升高而升高,随线密度的提高而减小;与干热处理比较,沸水加压处理后的纤维具有较好的热收缩率和卷曲性能。PET/PTT复合纤维线密度越低,其卷曲收缩能力越强,线密度为172 dtex时,纤维表现出较好的卷曲收缩率和卷曲稳定性。 相似文献
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以310 dtex/48 f聚对苯二甲酸乙二醇酯(PET)/聚对苯二甲酸丙二醇酯(PTT)复合预向丝为原料,经拉伸后得到PET/PTT复合纤维,探讨了拉伸工艺对PET/PTT复合纤维力学性能和卷曲性能的影响。结果表明:在卷绕速度为500 m/min,拉伸温度160℃,热定型温度150℃的条件下,随着拉伸倍数的增加,PET/PTT复合纤维的断裂强度、沸水收缩率、卷曲收缩率明显提高,断裂伸长率呈下降趋势,卷曲稳定度变化不明显;拉伸温度和热定型温度对PET/PTT复合纤维力学性能和卷曲性能的影响相对较小;拉伸过程中,控制拉伸倍数为1.95～2.00,拉伸温度为140～160℃,热定型温度为130～170℃,PET/PTT复合纤维性能较好。 相似文献
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将聚对苯二甲酸乙二酯(PET)与聚对苯二甲酸丙二醇酯(PTT)共混纺丝制备PET/PTT共混纤维,研究了共混纤维的结构与性能。结果表明,随着PTT含量的增加,PET/PTT共混纤维的晶粒尺寸逐渐增大;PET/PTT共混纤维的断裂强度较PTT纤维大,回弹性较PET纤维好,沸水收缩率较PET纤维大;当PTT质量分数为50%时,共混纤维的结晶度出现最小值,沸水收缩率出现最大值。 相似文献
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PTT/PET并列复合短纤维的卷曲和拉伸性能研究 总被引：2，自引：2，他引：0
对毛型聚对苯二甲酸丙二醇酯(PTT)/聚对苯二甲酸乙二醇酯(PET)并列复合短纤维进行卷曲和拉伸性能测试,对比分析了PTT/PET复合短纤、PTT/PET复合长丝和羊毛纤维的卷曲形态及卷曲性能,并通过实验探明处理PTT/PET短纤维的最佳时间和温度。实验结果表明,PTT/PET短纤的卷曲性能随温度的升高而变优,90℃时达到最佳,处理时间达到15min时,可使复合纤维卷曲性能达最佳状态。经过湿热处理后,PTT/PET并列复合短纤单位长度内的卷曲数明显增大,卷曲半径减小,三维卷曲形态更加明显。经过热处理的纤维,断裂强度和弹性模量下降,断裂伸长率增加。 相似文献
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<正>2复合由于2种组分不同的收缩性,复合纤维具有自卷曲性能,而PET/PTT的热收缩差异,正是制备卷曲纤维所需要的,从而使它有着良好的应用价值。由于弹性纤维氨纶使用时需包覆其他纤维,而且不 相似文献
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本文研究了PBT/PET并列型复合纤维在不同的松弛热定型和假捻变形工艺条件下,纤维卷曲度、卷曲收缩性能以及纤维结构之间的关系。试验表明复合纤维的卷曲性能随着热定型温度和变形温度的上升而增加,当温度升到某一值时超于平衡,本文还表明纤维卷曲性能与纤维中大分子链的解取向和结晶度有关。随着温度的增加,取向度下降,结晶度上升,卷曲性能亦上升。且证明了PBT/PET并列型复合纤维经假捻变形后其卷曲度、卷曲收缩率、卷曲模量、卷曲稳定性处于最佳状态,经机织后织物的弹性可达23％以上。 相似文献
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The instantaneous elastic recoveries of poly(trimethylene terephthalate) (PTT), PET, and PBT filaments were comparatively analyzed by a tensile testing machine. The conditions of the measurement were studied and the mechanism of instantaneous elastic recovery of these three aromatic polyester filaments is discussed. The instantaneous elastic recovery of PTT filaments was significantly higher than those of PBT and PET filaments. Moreover, PTT filaments had a high instantaneous elastic recovery even at a high elongation of 20%. The outstanding instantaneous elastic recovery of PTT filaments resulted from its helical conformation in crystal lattice, which responded immediately to the applied stress and deformed as though it was a coiled spring; we suggest it was a quasispring elastic recovery mechanism. When we measured the instantaneous elastic recovery of, PTT filaments with the tensile testing machine, it was appropriate to set up the crosshead speed at 500 mm/min with an elongation of 20% and a load of 0.5 cN/tex. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 1967–1975, 2004 相似文献
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Self‐crimp polyester yarns were manufactured using a conjugated spinning process involving two parallel but attached fibers with different shrinkage properties. A theoretical model proposed by Denton proved to be very useful for predicting crimp potential. Maintaining identical or very similar melt viscosities of the two components was demonstrated to be very critical for obtaining a straight interface and eliminating the dog‐legging problem. The crimp tests illustrate that the triangular shapes are superior to the round cross section. The optimum volume ratio for making a self‐crimp bicomponent skein is 50/50. Moreover, the optimal fiber thickness is 8 denier per filament. Finally, this study found that the combination of PET/PTT outperformed that of PET/PBT and PET/CD in terms of crimp potential, crimp stability, and elastic recovery. This phenomenon is primarily attributed to the markedly different thermal shrinkages of PET and PTT. POLYM. ENG. SCI. 45:838–845, 2005. © 2005 Society of Plastics Engineers 相似文献
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研究了PTT短纤维的力学性能。结果表明PTT短纤维具有优良的弹性和柔软度,其断裂伸长和弹性回复性比PET纤维高得多,一次拉伸回复和10次反复拉伸的总弹性回复率均高于PET纤维。相同定伸长应力松弛时,PTT的内应力小于PET纤维,且随着时间延长几乎没有什么大的变化,松弛时间远远大于PET纤维,表现出较好的弹性。 相似文献
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研究了染色条件对聚对苯二甲酸丙二酯(PTT)纤维上染率、纤维截面直径、力学性能和回弹性能的影响。结果表明:由于染料分子对纤维的膨润作用,使得纤维染色后截面直径增大,截面形状的圆整度提高,重量明显增大;使纤维的线密度增大,断裂强度降低,而初始模量、断裂伸长率和断裂比功变化的规律性不强。染色对于PTT纤维的拉伸回弹性有明显的影响,但对于其弯曲回弹性影响并不大。随着染色温度的提高,纤维的拉伸回弹率有所提高,而弯曲回弹率有所降低;但染色时间对拉伸和弯曲回弹率基本没有影响。 相似文献
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Hantao Zou Luoxin Wang Changhai Yi Hongtao Liu Weilin Xu 《Polymer Engineering and Science》2010,50(8):1689-1695
The thermal and rheological properties of poly(ethylene‐co‐trimethylene terephthalate) (PETT) copolymer are investigated. The thermal behavior of PETT copolymers is dependent on the composition. The PETT‐15 and PETT‐85 copolymers can crystallize, whereas the PETT‐30 copolymer cannot crystallize at 5°C/min cooling rate. The copolymers have a good thermal stability, even though the addition of poly(trimethylene terephthalate) (PTT) chain causes a disadvantage to the thermal stability of the copolymers. Moreover, the PETT copolymers are a typical pseudoplastic fluid exhibiting shear thinning. With increasing the shear rate or the content of PTT units, the flow activation energy decreases and the sensitivity of the shear viscosity to the melt temperature declines. The PETT copolymer filaments have intermediate elastic recovery and dyeability between poly(ethylene terephthalate) (PET) and PTT filaments. With increasing the PTT content, the elastic recovery and dyeability of PETT copolymer filaments increase. That is to say, introducing PTT units as a minor component into the macromolecular chains is an available means to improve the properties of PET filament. The obtained PETT copolymer filaments blend the advantage of the mechanical property of PET and the elastic and dyeability of PTT filament together into one polymer and possess a softer feeling and a higher extension. POLYM. ENG. SCI., 50:1689–1695, 2010. © 2010 Society of Plastics Engineers 相似文献