低熔点皮芯复合聚酯纤维干热收缩研究

为了降低低熔点皮芯复合聚酯纤维的干热收缩,提高尺寸稳定性,采用干热收缩测试仪和声速取向测量仪研究了低熔点皮芯复合聚酯纤维的收缩机理以及纺丝成形和牵伸工艺对干热收缩率的影响规律。结果表明降低纺丝速度、升高牵伸温度、降低二牵倍率分配比例,有利于降低纤维干热收缩率。通过工艺调整,降低了低熔点复合纤维干热收缩率。     

3组分FDY混纤技术的研究

3组分FDY混纤纺丝设备采用全并列形式,既并列纺丝箱、并列侧吹风、并列纺丝甬道、并列油轮、并列GR1,经第一网络合股后进入GR2牵伸,然后经导丝盘和第二网络卷绕成3组分的混纤纤维,从而生产出兼顾各种组分纤维特性和纤维复合新特性的高性能的混纤纤维,本文以生产高收缩涤纶、锦纶6和涤纶三角异形混纤纤维为例,论述了该设备的特点和相关工艺的设定方法。     

高收缩长丝热收缩率及试验方法

对高收缩纤维的热收缩率的2种测试方法沸水收缩率试验和干热收缩率试验进行了对比。通过实验数据比较,认为高收缩涤纶长丝的收缩率更适合用沸水收缩率表示。     

涤沦FDY异收缩纤维工艺探讨

该文通过对ＰＥＴ纺丝、热拉伸、侧吹风等工艺对涤纶沸水收缩率的影响研究，模型了涤经化异收缩纤维的工艺设计并从高速纺丝机理讨论影响ＰＥＴ收缩率的关键参数。     

拉伸温度对CDP-FDY纤维收缩性能的影响

通过沸水收缩率、干热收缩率、卷曲度、卷曲弹性率等一系列测试方法讨论了不同拉伸温度的CDP -FDY纤维热处理后的收缩和卷曲性能。结果表明 :拉伸温度高的CDP纤维的收缩率、卷曲度低 ,而卷曲弹性率高 ;CDP -FDY纤维的干热收缩率、卷曲度、卷曲弹性率均随热处理温度的上升、时间的延长而提高。     

PEIT共聚酯及其复合纤维的性能研究

研究了系列不同间苯含量(0相似文献   

PET/PTT复合纤维卷缩性能的研究

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。     

高密度涤锦复合超细纤维POY的生产

分析了涤锦超细纤维布与普通聚酯布的区别。从原料的选择,干燥条件,纺丝技术等方面,介绍了高密度涤锦复合超细纤维的关键技术难点。其DTY产品沸水收缩率可达10%以上,织物经处理后,具有特殊的优良性能:织物回缩致密不变形,手感更加柔软,纤维的比表面积大,能满足电子无尘布市场。     

复合纺丝法纺制超细旦纤维的工艺研究

用复合纺丝法纺制了涤锦复合超细纤维,在常规及高速纺丝条件下,研究了冷却条件、集束点位置、纺丝速度、涤锦复合比、拉伸条件等对纤维的力学性质、热收缩性、取向和结晶等的影响,得出在上述条件下的影响规律.文中还对纤维的剥离性能及其对纤维的纺织加工性进行研究,为利用剥离法制取涤锦复合超细纤维提供依据.     

锦/涤复合超细纤维的碱减量处理及其对性能的影响

本文讨论了碱减量处理对锦/涤复合起细纤维力学性能、剥离性能和收缩性能的影响.     

三异细旦高弹涤纶复合纱的生产工艺

对细旦T400复合弹性纤维的纺丝工艺以及以细旦T400复合弹性纤维与细旦涤纶POY复合生产三异细旦高弹涤纶复合纱的假捻变形工艺进行了分析。实验证明:控制好纺丝工艺制得合适的双组分并列复合弹性纤维T400POY,然后在假捻变形加工过程中与细旦涤纶POY网络复合,可以制得弹性好、手感柔软、绒感风格独特的异成分、异线密度、异收缩的三异细旦高弹涤纶复合纱。     

PTT/PA6拉伸丝的形态与性能的研究

考察了聚对苯二甲酸丙二醇酯/聚酰胺6(PTT/PA6)拉伸丝的形态,测试了其线密度、断裂强度、回潮率、热收缩率及卷曲性能,并与聚对苯二甲酸乙二醇酯/聚酰胺6(PET/PA6)拉伸丝进行了对比.结果表明:PTT/PA6拉伸丝横截面为橘瓣型,裂离后为三角形.PTT/PA6拉伸丝的断裂强度、断裂功和卷曲收缩率随纺丝速度的增加...     

PA66高强低缩FDY纺丝技术探究

以235 dtex/34 f PA66 FDY工业丝为例,通过对PA66高强低缩FDY二位实验线装置的设备及工艺条件的探讨,研究出纺丝、拉伸、定型、卷绕适宜的关键工艺参数,开发了500 t/a产业用高强低缩PA66 FDY工业丝的实验生产线。     

浅析一步法涤纶异收缩混纤丝设备

介绍了一步法涤纶异收缩混纤丝设备的主要配置和结构特点,探讨了该设备中拉伸卷绕丝路的多样性设计。全拉伸丝(FDY)与预取向丝(POY)丝路单独控制、"双胞胎"组件、双丝室侧吹风、多种拉伸卷绕丝路选择等增强了异收缩混纤丝设备的一机多能。该机还可用于生产涤纶FDY、POY、中强丝、涤纶低缩丝等产品。     

PA6工业丝装置改纺PA66工业丝技术探讨

在PA6工业丝生产装置上,通过对切片输送系统和纺丝部分适当改造,优化生产工艺,可纺制PA66工业丝.结果表明:经设备改造和工艺调整后,生产的1 400dtex/210 f PA66工业丝可纺性好,产品优等品率达98%,纤维物理性能优良,断裂强度8.5 cN/dtex,断裂伸长率19.3%,定负荷伸长率8.5%,干热收缩...     

二醋酯长丝复合空气变形纱的性能比较

采用5种不同83．3 dtex合纤长丝作芯丝,分别与177．34 dtex二醋酯长丝进行复合空气变形加工, 分析了不同芯丝对变形纱的结构及其性能的影响。结果表明,复合变形纱的强伸性能和沸水收缩率主要由其芯丝决定;5种芯丝中,以PFT FDY作芯丝时,复合空变纱的丝圈稳定性最好,结构膨松性良好、断裂强度较高,断裂伸长率、2 mm高度毛羽数和成纱外观均匀性居中,但沸水收缩率偏大。     

Mechanism and kinetics of shrinking of texturized composite fibres having a matrix-fibrillar structure

Conclusions The mechanism and kinetics of shrinkage of complex texturized composite yarns having a matrix-fibrillar structure, and also of yarn shrinkage in a crimp, have been studied.It has been shown that the behavior of a yarn in a crimp on heating, and also the shrinkage of complex texturized yarns, depends considerably on the disposition of the polyethylene fibrils in the polycaproamide matrix.Spinning yarns with a nonuniform disposition of fibrils in the matrix permits one to obtain texturized yarns with a combined spatial-planar twist and an elevated bulkiness.Translated from Khimicheskie Volokna, No. 3, pp. 32–34, May–June, 1988.     

尼龙66/增粘聚酯复合短纤维生产工艺探讨

根据工业用呢行业对纤维原料的技术要求,以增粘聚酯(PET)和尼龙66(PA66)为原料,生产出PA66/PET工业用呢用复合短纤维,探讨了其生产工艺。结果表明:选择PA66/PET质量比为60/40,纺丝温度为298℃,第一拉伸倍数为3.8,第二位伸倍数为1.15,第一拉伸温度为85℃,第二拉伸温度为100℃,侧吹风温度18℃,风速1.0 m/s,可生产出质量较好的33 dtex×76 mm的工业用呢复合短纤维。     

Solvent‐induced modifications in polyester yarns. I. Mechanical properties

The mechanical properties of polyester (PET) yarns, fine filament, and microdenier (original and heat‐set), treated with a trichloroacetic acid–chloroform (TCAC) mixture were investigated. The treatments were carried out in an unstrained state with various concentrations of the TCAC reagent at room temperature. The TCAC treatment on PET yarns resulted in notable changes in the tensile behavior. The TCAC‐treated yarns exhibited higher extensibility and work of rupture without much loss in strength. The improvement in elongation was less in the case of heat‐set polyester yarns due to solvent treatment. The depression of the glass transition temperature (T_g) of TCAC‐treated PET yarns, even at the minimum concentration, showed its effectiveness to plasticize the fibers and the closeness of the solubility parameter of TCAC and PET. The T_g depression favors molecular relaxation, which has resulted in a higher shrinkage percentage of TCAC‐treated PET yarns and the effective shrinkage was reached more easily for the original fine‐filament polyester (FFP) and microdenier polyester (MDP) yarns at the lowest concentration. The effects of the concentration of TCAC on the strength, elongation, yield behavior, and work of rupture on PET were also investigated. A significant plastic flow was observed in the TCAC‐treated yarns. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 87: 1500–1510, 2003     

Tensile fatigue behavior of polyamide 66 nanofiber yarns

Nanofiber yarns with twisted and continuous structures have potential applications in fabrication of complicated structures such as surgical suture yarns, artificial blood vessels, and tissue scaffolds. The objective of this article is to characterize the tensile fatigue behavior of continuous Polyamide 66 (PA66) nanofiber yarns produced by electrospinning with three different twist levels. Morphology and tensile properties of yarns were obtained under static tensile loading and after fatigue loading. Results showed that tensile properties and yarn diameter were dependent on the twist level. Yarns had nonlinear time‐independent stress–strain behavior under the monotonic loading rates between 10 and 50 mm/min. Applying cyclic loading also positively affected the tensile properties of nanofiber yarns and changed their stress–strain behavior. Fatigue loading increased the crystallinity and alignment of nanofibers within the yarn structure, which could be interpreted as improved tensile strength and elastic modulus. POLYM. ENG. SCI., 55:1805–1811, 2015. © 2014 Society of Plastics Engineers