PTT棉混纺纱及其针织产品性能研究.pdf

东华大学
硕士学位论文
PTT/棉混纺纱及其针织产品性能
姓名:张敏
申请学位级别:硕士
专业:纺织工程
指导教师:张佩华
20041229
摘要
新聚酯PTT(聚对苯二甲酸丙二醇酯)纤维不仅兼具普通聚酯纤
维(涤纶)和PBT纤维二者的优点,而且由于“奇碳效应”具有良
好的回弹性和莲松性,而且在加工过程中可直接作为弹性纱使用,工
序简单。此外,PTT纤维还具有特别优异的柔软性、优良的抗折皱性
和尺寸稳定性、耐气候性、常压低温易染色性以及良好的屏障性能
能经受住Y射线消毒,因而可开发高级服饰和功能性织物,PTT纤
维因具有良好的弹性和柔软性,尤其适用于生产针织和机织物。
在最近的十多年里,聚酯/棉混纺物已成为用途十分广阔的纺织
物。除触感外,比例的涤/棉织物并不比纯棉织物有什么优越性,
所以我国目前生产的涤棉织物主要是涤纶混合量较多的品种。新型聚
酯纤维PTT具有优异的弹性回复性,而其他性能又与PET相差不大,
采用低比例PTT/棉混纺纱线编织针织物则可以得到触感良好的理想
内衣面料,符合现代舒适、适体的着衣理念。
本课题研究了低比例PTT/棉混纺纱线及其拉伸性能,并详细探
讨了其针织物的染色性能、拉伸回复性能、耐用性能以及透湿汽性能。
通过测试PTT/棉混纺比例分别为50/50、35/65、30/70、25/75、
0/100的五种纱线的拉伸性能,结果表明,弹性纤维PTT含量较低时,
纱线的断裂强力较高,而断裂伸长率较低:混纺纱在25%的断裂负
荷下拉伸1小时的急弹性回复率大约在57%~70%之间,缓弹性回复
率在5.3%~7.4%之间,塑性变形在24.4%~36%之间。PT含量增加,
则纱线的弹性提高。
本课题研究了织物的染色性能和拉伸回复性能,在染色时,根据
色泽深浅选择调整前处理方案,再分别用四种方案即分散/直接染料
浴法、分散/直接染料两浴法、分散/活性染料一浴法及分散/活性染
料两浴法染色。在染拼色和深色时采用两浴法方案,染较浅色泽时则
用一浴法方案。除易染性外,优异的弹性回复性是新聚幽PTT的另
个突出特点,因此本课题重点进行了PTT/棉织物的拉伸回复性能
研究,包括一次和三次定伸长拉伸、较高拉伸比和较低拉伸比拉伴以
及织物在达到湿松弛状态后的上述条件下的拉伸性能。试验结果表
明:即使较低比例PTT纤维的加入也对织物的拉伸回复性能有较大
的提升,PTT含量越高,织物的保形性能越好
通过对PTT/棉混纺织物的耐用性能和透湿汽性能测试,得出
PTT/棉混纺织物耐用性能优良,是较理想的服装面料的结论。
关键词: PTPT/棉针织染色拉伸回复性
耐用性
The study of properties of
PTT/cotton blended yarns and knitted fabrics
Abstract
The new polyester fiber -PTT(Poly Trimethylene Terephthalate
not only has the advantages of PET and PBT tiber, but offcrs the unique
properties of elastic resilience and puffiness. Unlike spandex, PIT may
be blended directly with other fibers, which makes spinning process
sampler. In addition, PTT has excellent properties of softness
anti-creasing, good dimensional stability, chromatophile and shielding
even Y ray, therefore it is an ideal material for high-class dresses
and factional fabrics, especially for knitting and weaving clothing
because of its flexibility and softness
In the last ten years, PET/cotton fabric has been widely used. The
property of blended fabric with low percent PET is no better than pure
cotton fabric except hand feeling, so there is more with high percent
PET at present in China. The new polyester fiber--ptt has excellent
elastic recovery and yet its other properties are similar to PET. The
PTT/cotton blended knitted fabric with low percent PIT has so good
hand feeling that it is absolutely suitable for underwear
This paper studied the dyeing ability, elastic recovery of elongation
durability and water vapor permeability. The flexibility of PTT/cotton
blended yarns of five different percentage(50/50, 35/65, 30/70, 25/75
0/100)were tested. The testing results showed that the lower the PTT
percentage, the higher the breaking strength, and the smaller the
breaking elongation. When the yarns for one hour under the load of 25%
of the breaking strength were stretched, the ranges of immediate elastic
deformation reached to 57%0-70%. the delayed deformation is about
3%0--7.4% and the plastic strain is nearly 24.4%-36%. The higher the
PTT percentage, the elastic resilience is better