汉中521厂假捻机小转子和镶嵌式高精度喷丝头研制成功

<正> 陕西汉中621厂自1979年以来,在研制假捻机小转子过程中,做了大量工作,攻克了道道难关,取得了可喜成绩。该厂为VC473,VC473B假捻机生产的HT811、HT811A、HT811B磁性小转子是高、低弹力丝加工的关键配件,经过多年使用,证     

涤纶外拉伸假捻变形工艺的探讨

<正> 在涤纶外拉伸假捻变形的过程中,有关的工艺参数较多。本文以在FTF-481型低弹力丝假捻机上积累的经验为主,逐一讨论这些参数的影响。 一 实验 1.FTF-481型低弹力丝假捻机的技术特征图1是该机的示意图。由图可见,加热方式为三区电加热: 变形区——电热管φ4.9×0.5×1012,     

VC473弹力丝假捻样机工艺研究

捻度(Twist)、加热定型温度(Tempera-ture)张力(Tension)和热定型时间(Time)、是假捻法生产弹力丝的主要工艺参数,简称_4T,这四个物理量对弹力丝生产的影响非常大,VC473在使用中也是如此。我们了解这些参数的作用,才能使生产正常进行,保证弹力丝的质量,另外还可利用这些参数,为生产不同物理性能的多种弹力丝服务。     

假捻变形丝机的发展动向

<正> 合纤长丝的主要变形加工方法有假捻法,喷气变形法及填塞箱卷曲法等三种。在衣着领域中,以假捻法为最重要,其生产能力占整个衣用变形丝的90％以上。 假捻变形丝俗称弹力丝,按其卷曲缩率的大小分为高弹丝、中弹丝及低弹丝三挡,见表1。     

假捻变形工艺的发展

着重介绍了各种假捻变形机（转子式假捻器、磨擦式假捻器、搓环式假捻器）的假捻变形机理，加工工艺及特点，并对其发展方向做了简单的概述。     

锦纶6弹力丝的工艺探讨

通过对热板温度、加弹速度、拉伸比、D Y比、假捻张力等工艺参数的调整 ,探讨了影响锦纶 6弹力丝生产的主要因素。     

锦纶弹力丝质量与原丝性能的关系

<正> 影响锦纶弹力丝质量的因素很多。除了设备、工艺条件外,与原丝性能的关系也十分密切。但国内过去偏重于对假捻变形工艺和设备的研究,而在原丝性能对弹力丝质量的影响方面未加重视。本文将就后者的关系简要地进行分析讨论,以利进一步改进适应假捻变形加工的原丝生产工艺,提高弹力丝质量。     

VC472型转子式假拈机

在批林批孔运动的推动下,“工业学大庆”的群众运动蓬勃发展,以上海纺织二机为主,上海纺织专件厂,上海纺织轴承一厂,上海纺织橡胶厂,上海纺院和上海织袜二厂等单位共同协作试制成VC472型转子式弹力丝假拈机。经一年多的试车运转和生产实践考验,证明性能良好,基本上达到设计要求。 VC472型弹力丝假拈机主要适用于锦纶和涤纶牵伸低拈丝加工为高弹性弹力丝。适用支数为40—150(代系)。     

摩擦式假捻器参数分析及选用

<正> 假捻法是变形加工最主要的方法,其核心部件是假捻器,通常可分为转子式,摩擦式,皮圈式三大类。本文根据摩擦假捻器工作原理及变形丝的质量来分析假捻器的主要参数与选用,以设计出较好的假捻器。     

锦纶66细旦多孔弹力丝生产工艺探讨

采用锦纶66 POY-DTY生产工艺生产dpf<1.2 dtex的细旦多孔弹力丝,主要讨论POY的切片选择、切片干燥、纺丝温度、喷丝孔径、丝束冷却等工艺,简要介绍了DTY的拉伸假捻工艺。     

优质28dtex/24f涤纶超细型高弹力丝的生产工艺

在涤纶POY-DTY设备上,为了得到替代尼龙高弹丝的涤纶超细型POY束丝,从卷绕速度(纺丝速度)、固化成形、喷丝孔的直径与长径比、组件内部压力、熔体温度等进行工艺条件的试验与分析;在停止使用定型热箱的前提条件下,从DTY机的加工速度、拉伸变形温度、全陶瓷假捻器摩擦因数、组合方式、间距和喂丝角度等进行工艺条件的试验与分析,开发与生产了优质的28dtex/24f涤纶超细型高弹力丝。     

Role of slippage in the orientation stretch of Oksalon yarns

Conclusions It has been shown that in the continuous orientation stretching of Oksalon yarn in air, the deformation region is located close to the first stretch roll, including an arc of yarn slippage on it.The need to take the slippage arc into account in continuous yarn stretching has been demonstrated.By varying the frictional parameters of the first stretch roll, it is possible to achieve an increase in the strength of the finished yarn.Translated from Khimicheskie Volokna, No. 5, pp. 22–23, September–October, 1985.     

Heat exchange in the stretch roll-yarn system in stretching complex synthetic yarns

Conclusions At assigned values of the technological process of yarn stretching (speed, temperature, stretch ratio, and number of turns), both the temperature of the lower stretch roll and also the time of departure into a steady temperature regime are unambiguously determined.High yarn breakage at the start of operating time for output on twisting and stretching machines may be explained by an insufficient surface temperature of the lower stretch roll.The temperature of the lower stretch roll surface reaches a steady value after approximately 600 sec (depending on the temperature and rate of fibre movement). The yarn produced during this time has reduced physico-mechanical properties.To improve the passage of yarns which are drawn on twisting and stretching machines, it is advisable to make the lower stretch rolls heatable at the initial moment of operation, and also to reduce their weight.Translated from Khimicheskie Volokna, No. 6, pp. 18–20, November–December, 1986.     

细旦多孔异彩复合假捻变形丝的生产工艺

采用阳离子染料可染改性聚酯切片,经熔融纺丝制得细旦多孔阳离子染料可染涤纶预取向丝(POY),在假捻变形加弹机上与细旦多孔常规涤纶POY以特别方式复合混纤加工,可制得一染异色的细旦多孔异彩复合假捻变形丝,产品适用于高档起绒面料,并具有重要的环保意义。     

细旦多孔异彩复合假捻变形丝的生产工艺

采用阳离子染料可染改性聚酯切片,经熔融纺丝制得细旦多孔阳离子染料可染涤纶预取向丝(POY),在假捻变形加弹机上与细旦多孔常规涤纶POY以特别方式复合混纤加工,可制得一染异色的细旦多孔异彩复合假捻变形丝,产品适用于高档起绒面料,并具有重要的环保意义。     

Effect of stretching conditions on the properties of polyester textile yarns

Conclusions By varying the temperature of the heating roll and, correspondingly, the magnitude of the natural stretch ratio, one can obtain a required level of change in shrinkage in a definite sequence; and by periodicity of removal of the yarn being stretched from the heater, one may obtain lengthwise variation in shrinkage of polyester textile yarn.Translated from Khimicheskie Volokna, No. 2, pp. 37–39, March–April, 1987.     

Preparation of polyacrylonitrile fibre by spinning into organic baths

Conclusions -- The spinning of polyacrylonitrile copolymers into organic baths containing dimethyl sulfoxide and isopropyl alcohol has been investigated. It has been found that the optimum DMSO:IPA ratio in the precipitation bath is 60:40% by wt..-- It has been discovered that the strength of the spun yarn is higher the lower the jet stretch.-- The effect of temperature on orientation stretch ratio has been studied. It has been shown that the optimum temperature for heat stretching of PAN yarn lies in the range 155–160°C.-- The dimethyl sulfoxide content of yarn has been determined by technological transitions. In the final yarn it does not exceed 0.3–1.2% by wt.VNIIPV. Translated from Khimicheskie Volokna, No. 3, pp. 15–16, May–June, 1991.     

影响锦纶6高弹丝弹性因素的探讨

本文介绍了日本村田公司333-S、336加弹机生产锦纶6高弹丝的工艺条件,并从POY原料、工艺条件、机械条件等方面讨论了各因素对锦纶6高弹丝弹性的影响及其控制方法。     

用假捻变形机和空气变形机生产新型纱线

本文介绍Barmag公司与用户合作,利用假捻变形机和空气变形机,稍加改造,开发细旦变形丝、重旦变形丝、捻回弹力丝、皮芯纱、S/Z捻合股纱,缝纫线等新产品。生产合股纱时采用“双摩擦假捻装置”可充分利用机器,提高生产效率。在变形机上采用在线质量控制可大大提高产品质量,生产“无疵点”纱。     

锦纶细旦丝变形加工的新设备与新工艺

根据细旦丝的特性,探讨了生产锦纶细旦弹力丝的新型设备与新工艺。