聚对苯二甲酸丙二酯纤维在机织物中的应用

对聚对苯二甲酸丙二酯(PTT)纤维在机织物中的应用进行了研究。利用不同结构的PTT纤维的纯纺和混纺纱线,设计开发了平纹和斜纹组织的交织物,并对其服用性能如弹性回复性、折皱回复性、刚柔度、悬垂性、抗起毛起球性等进行了测试与分析。通过测试分析可以得出:利用PTT纤维可得到柔软、悬垂、抗皱的弹性机织物。     

PTT机织物结构与服用性能的灰色关联分析

为了更有效地利用PTT纤维,推动PTT新产品的开发,针对几种不同结构的PTT机织物试样,测试了试样的结构参数和织物风格、悬垂风格、折皱回复等服用性能指标,并开展了PTT机织物结构与服用性能的灰色关联分析。研究发现:织物纬向弯曲长度、纬向弯曲刚度、纬向成形性,纬向松弛收缩率都与纬纱线密度相关性最强;织物经向弯曲刚度、经向成形性、经向急弹(缓弹)折皱回复角都与经纱线密度相关性最强;织物经纬向弯曲长度、剪切刚度、悬垂系数都与织物面密度相关性较强。     

防电磁辐射混纺织物的设计与开发

20μm的不锈钢长丝与25 tex的竹浆/丝光羊毛(50/50)股线经过并线加捻设计开发出5种不锈钢长丝含量不同的纱线,设计并试织了不锈钢长丝质量分数分别为11%、15%、17%、22%、26%的5种2/2斜纹组织织物。测试和分析了这5种织物的防辐射性能、厚度、面密度、透气性、悬垂性、刺痒感、汽蒸收缩性、折皱回复性。结果表明:开发的5种织物均具有良好的防电磁辐射性能,且随着不锈钢长丝含量增加,织物的防辐射性能提高,厚度、面密度、刺痒分值逐渐增大,透气性、悬垂性、折皱回复性降低,汽蒸收缩性先降低后保持不变。     

Tencel织物的性能测试

介绍了 Tencel纤维织物的性能 ,测试了纯 Tencel织物、Tencel混纺织物及粘胶纤维织物的折皱回复性 ,起拱变形性 ,耐磨性和起毛起球性 ,结果 Tencel织物均优于粘胶织物 ,认为 Tencel织物具有优良的服用性能。     

形状记忆织物的记忆性能研究

为探讨纯PTT、PTT与PET混纺、纯PET三类"形状记忆"织物以及免烫棉织物的形状记忆性能,对它们进行易塑形性能及折皱回复性能的测试,并对测试参数进行优化,研究了4种织物形状记忆性能的差异。结果表明:相较于半记忆、仿记忆织物以及免烫棉织物,纯PTT织物具有优异的形状记忆性能。     

Tencel织物的服用性能研究

测试了Tencel纯纺和混纺织物的舒适性、悬垂性、折皱回复性、起拱变形性、耐磨性和起毛起球性等服用性能指标，同时与粘胶纤维织物、棉织物进行比较，表明Tencel织物优于其它织物，具有优良的服用性能。     

混纺比对毛涤混纺织物性能的影响分析

毛涤混纺织物挺括、耐磨、抗皱、保型,但涤纶含量过多织物会显硬板、不丰满、容易起毛起球等。为了分析毛涤混纺比对织物性能的影响,测试了四种不同混纺比的毛涤混纺织物的悬垂性、抗折皱回复性、抗起毛起球性等。结果显示:在不影响织物外观性能和舒适感的条件下,随着涤纶含量的增加,毛涤混纺织物的耐磨性增强,抗折皱回复性能变好,但同时也会在一定程度上造成织物的起毛起球现象加重,悬垂性变差。     

PTT/PET自卷曲长丝的拉伸和弹性回复性能

对相同细度的3种聚对苯二甲酸丙二醇酯（PTT）／聚对苯二甲酸乙二醇酯（PET）自巷曲长丝进行拉伸性能和定伸长回复性能测试。测试结果表明：PTT/PET自卷曲长丝拉伸曲线具有典型的两个阶段和两个屈服点的特征,预加张力的大小对于伸长率的测试结果影响很大;卷曲伸长对该类长丝较高的伸长率有较大贡献,经过湿热处理后的长丝卷曲伸长和断裂伸长明显增加,但是不同的PTT／PET自卷曲长丝的伸长能力有一定差异;PTT/PET自卷曲长丝的弹性回复性能低于纯PTT长丝,而高于PET长丝,弹性回复性主要来源于具有优异弹性回复性的PTT大分子链结构;热处理的PTT/PET长丝在高定伸长率下有着较好的弹性回复性,在定长为30％时的弹性回复率接近100％。     

聚乳酸织物的开发及性能评价

基于聚乳酸纤维的优良性能,开发出6种夏季服用织物,并对其透气量、悬垂系数、折皱回复角和光泽度等性能进行了测试。测试结果证明:聚乳酸纯纺织物舒适性更好,聚乳酸纱与涤棉包覆纱交织的织物外观风格更好。     

Y形涤纶织物性能的研究

利用Y形截面涤纶设计开发了斜纹组织的纯纺织物,对不同纬密和碱处理前后织物的吸水性、透气性、刚柔性及折皱回复性等进行测试与分析。结果表明:在其它条件相同的情况下,随着织物密度的增加,织物吸水性、透气性及折皱回复性降低,硬挺度增加;碱处理后织物的导湿性下降而润湿性提高,透气性、柔软性增强,折皱回复性降低。     

Physical characteristics and morphologies of PTT/m-iPP bi-component filaments of the island-in-sea type

The work discusses preparation, structure and selected properties of two special filaments based on poly(trimethylene terephthalate) (PTT) and metallocene isotactic polypropylene (m-iPP) bi-component filaments of the island-in-sea type. PTT microfilaments are formed by removing m-iPP from PTT (island)/m-iPP (sea) conjugated filaments. m-iPP exhaust dyeable filaments are produced from m-iPP (island)/PTT (sea) conjugated filaments. This study thoroughly investigates the physical characteristics and morphologies of PTT/m-iPP bi-component filaments of the island-in-sea type. The dye exhaustions of the fabrics made of PTT series filaments are compared. Experimental DSC results indicated that PTT and m-iPP crystallites formed an immiscible system. The tenacity of the PTT/m-iPP (and m-iPP/PTT) conjugated filaments initially declined and then increased as the proportion of m-iPP (and PTT) increased. Clearly, the 50/50 weight ratio PTT/m-iPP had the lowest tenacity. The experimental crystallinities revealed that PTT and m-iPP crystallites easily formed individual domains, indicating that PTT and m-iPP together constituted an immiscible system. On the morphology, the blends were had a dispersed phase structure. PTT and m-iPP polymers were immiscible. In this investigation, PTT microfilaments were produced and a large size from 2.3 to 2.6 μm in diameter was clearly observed. m-iPP exhaust dyeable filaments were also prepared. The dye exhaustions of various fabrics followed the order, m-iPP exhaust dyeable filaments, conventional PTT filaments, PTT microfilaments respectively.     

Instantaneous elastic recovery of poly(trimethylene terephthalate) filament

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     

PTT纤维及织物的结构、性能与应用

针对PTT纤维的特殊结构,分析了其性能与应用中的关键技术。PTT纤维具有良好的手感柔软性、拉伸弹性、尺寸稳定性等,因此适宜开发机织面料。测试了三毛、十七棉和宁波中鑫PTT面料的一般性能。     

PTT长丝瞬时拉伸回弹性能研究

在相同条件下对比研究了PET ,PTT和PBT 3种芳香族聚酯长丝的瞬时拉伸回弹性能 ,分析了测定条件对PTT长丝瞬时拉伸回弹性能的影响 ,并初步讨论了 3种芳香族聚酯长丝的瞬时拉伸回弹机理。结果表明 ,PTT长丝的瞬时拉伸回弹性能明显优于PBT长丝 ,更优于PET长丝 ,PTT长丝在低伸长率和高伸长率下均具有优异的瞬时拉伸回弹性能 ;测定PTT长丝瞬时拉伸回弹率时 ,建议采用 0 .5cN/tex的预张力 ,5 0 0mm/min的拉伸速率和 2 0 %的定伸长率等条件     

芳香族聚酯纤维弯曲回弹性能研究

研究了PTT ,PET和PBT纤维的弯曲回弹性能及回复机理。结果表明 :在形变时间 2 0min条件下 ,PBT纤维的弯曲回弹率最高 ,PTT纤维次之 ,PET纤维最低 ,且均随回复时间的延长而提高。弯曲回弹率与其断裂比功之间均存在明显的相关性 ,随着纤维中亚甲基数的增加 ,断裂比功降低 ,弯曲回弹率提高。纤维弯曲回弹性能与其聚集态结构中的结晶和取向结构 ,以及结晶结构中大分子链的构象有关