异染型涤纶竹节丝生产工艺探讨

介绍了异染型涤纶竹节丝的生产技术与工艺流程，分析了异染原理，讨论了纺丝侧吹风、后拉伸倍数、拉伸罗拉绕丝圈数、拉伸温度、定型温度等工艺参数对成品品质与异染效果的影响。     

异染型仿真竹节纱的生产技术浅析

介绍了异染型仿真竹节纱的生产技术与工艺流程,讨论分析了异染原理和纺丝速度;侧吹风风速、风温、风湿;纺丝油剂及上油率;拉伸倍数;拉伸罗拉绕丝圈数;拉伸温度;定型温度等工艺参数对其品质与异染效果的影响。     

异染型涤纶长丝的工艺研究

研究了涤纶ＰＯＹ后拉伸工艺与异染型涤纶长丝成形及异染性能的关系。结果表明：拉伸倍数、热盘绕丝圈数、热板温度、拉伸速度、拉伸温度是制备异染型涤纶长丝的主要影响因素。拉伸速度为７３１ｍ／ｍｉｎ，拉伸倍数为１．４４２７时，异染型涤纶长丝色差可达灰卡２．５级，深色段平均长度达６ｍｍ，与常规长丝相比，其强度低，伸长率、条干不匀率和沸水收缩率高。     

涤纶白纹丝生产技术

本文介绍白纹丝的生产方法，分析和解决在试验过程中出现的问题，发现预拉伸倍数和预加热温度是影响白纹丝异染效果的两个最重要因素。     

异染、异收缩特种混纤丝的开发与生产

采用具有不同染色性能的PET和CDP切片,在SP23纺丝机和M—402拉伸机上,通过对纺丝、拉伸工艺的合理选择,可制得具有异染和异收缩特性的特种混纤网络丝.该丝加工成平纹织物,经阳离子染料染色后,布面具有独特风格.     

扁平异染超亮涤纶拉伸变形丝的生产技术

使用大有光聚酯切片先制得半取向丝(MOY)后,再经特殊的假捻变形工艺路线开发生产出扁平异染涤纶拉伸变形丝(DTY)。在加工过程中开发出了特有的不匀拉伸装置,可以使得纤维产生不匀率高的拉伸效果,从而达到纤维片段上的高染色不匀,丰富了产品的外观特色。通过合理选用工艺流程和纺丝假捻变形工艺,可生产出品质高、性能良好的扁平异染超亮涤纶DTY。     

低纤度聚酰胺6长丝的结构与性能

借助X射线衍射及差示扫描量热技术,研究并分析了不同拉伸热定形工艺条件下低纤度聚酰胺6纤维的结晶取向的变化及对纤维力学性能的影响。结果表明:总拉伸倍数不变的情况下,适当提高牵伸辊的拉伸倍数更能有效地提高纤维强度;在一定温度范围内,适当提高热定形温度有利于改善晶区结构,但对纤维的取向度影响不明显,当热定形温度高于175℃时,纤维断裂强度出现下降;保持拉伸倍数及热定形温度不变,改变纺丝速度,纤维结构和力学性能的变化不显著。     

正交试验法在PAN原丝纺丝工艺中的应用

利用正交设计方法确定了PAN湿法纺丝过程中影响原丝性能最主要的因素。结果表明 :以计量泵转速、凝固浴温度、负拉伸以及蒸汽拉伸倍数作为考察对象 ,影响原丝性能的最显著因素是蒸汽拉伸倍数 ,其次是负拉伸。以负拉伸、第二拉伸、第三拉伸以及蒸汽拉伸的倍数作为考察对象 ,影响原丝性能最显著的是蒸汽拉伸倍数 ,负拉伸几乎没有影响。利用正交实验结果 ,适当调节蒸汽拉伸倍数 ,制得强度为 6.5～ 7.0cN/dtex ,线密度为 1.1～ 1.3dtex的原丝     

涤纶异缩混纤350dtex／264fATY生产工艺探讨

以涤纶细旦ＰＯＹ作为空变丝变形原料，应用瑞士海柏林的Ｈｅｍａ Ｔｌｌｏ喷嘴在Ｂａｒｍａｇ ＦＫ６Ｔ－８０空变机上加工涤纶异缩混纤３５０ｄｔｅｘ／２６４ｆＡＴＹ，，采用皮芯型结构，讨论和阐述其主要生产工艺技术，纤维的拉伸倍数和牵伸温度是加工此差别化纤维的关键工艺，该纤维富有独特的天然质感，是一种用途前景广阔的新合纤。     

利用回收的己内酰胺生产拉伸丝

探讨利用回收的己内酰胺进行聚合纺丝生产拉伸丝的工艺 ,最佳工艺条件 :纺丝组件的海砂用量增加 1倍 ,纺丝温度 2 82℃ ,纺丝速度 3 80m/min ,侧吹风速度 0 .5～ 0 .8m/s ,拉伸倍数 5 .19,生产出合格的拉伸丝。     

纺前注射法生产涤纶全消光FDY

在Barmag热管纺丝(TCS)设备上采用纺前注射法生产涤纶全消光FDY。试验表明,二氧化钛母粒质量分数2.6%-3.0%,含水率小于80μg/g,纺丝温度较常规纺丝低,为286℃左右,TCS温度135℃,卷绕速度4 500 m/min,纤维染色较好。     

影响锦纶6拉伸变形丝染色性能的主要因素

从原料、工艺、设备等方面入手,对影响锦纶6拉伸变形丝(DTY)染色性能的主要因素进行分析和试验论证。实践证明:切片是影响DTY染色性能的关键因素,纺丝温度及速度、DTY热箱温度、拉伸比对DTY丝上染率影响较大,预取向丝(POY)、DTY质量稳定性对染色均匀性影响也较大。     

Melt spinning and drawing of 2‐methyl‐1,3‐propanediol‐substituted poly(ethylene terephthalate)

The structure and properties of fibers prepared from copolymers of poly(ethylene terephthalate) (PET) in which 2‐methyl‐1,3‐propanediol (MPDiol® Glycol is a registered trademark of Lyondell Chemical Company) at 4, 7, 10, and 25 mol% was substituted for ethylene glycol were studied and compared with those of PET homopolymer. Filaments were melt spun over a range of spinning conditions, and some filaments that were spun at relatively low spinning speeds were subjected to hot drawing. The filaments were characterized by measurements of birefringence, differential scanning calorimetry (DSC) crystallinity, melting point, glass transition temperature, wide‐angle X‐ray diffraction patterns, boiling water shrinkage, tenacity, and elongation to break. Filaments containing 25 mol% MPDiol did not crystallize in the spinline at any spinning speed investigated, whereas the other resins did crystallize in the spinline at high spinning speeds. However, compared with PET homopolymer, increasing substitution of MPDiol reduced the rate at which the crystallinity of the melt spun filaments increased with spinning speed and reduced the ultimate crystallinity that could be achieved by high‐speed spinning. The rate of development of molecular orientation, as measured by birefringence, also decreased somewhat with increasing MPDiol content. Shrinkage in boiling water decreased at high spinning speeds as the amount of crystallinity increased; however, the shrinkage decreased more slowly with increase in spinning speed as MPDiol content increased. Tenacity also decreased slightly at any given spinning speed as MPDiol content increased, but there was no significant effect on elongation to break. The addition of MPDiol in amounts up to 7 mol% increased the maximum take‐up velocity that could be achieved at a given mass throughput. This result indicates that the use of higher spinning speeds could potentially increase the productivity of melt spun yarns. Copolymer filaments spun at low speeds were readily drawn to produce highly oriented fibers with slightly less birefringence, crystallinity, and tenacity than similarly processed PET homopolymer. Preliminary dyeing experiments showed that the incorporation of MPDiol improved the dyeability of the filaments. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 88: 2598–2606, 2003     

纺丝拉伸一步法制涤纶全拉伸丝工艺研究

PET连续纺丝拉伸的二种不同工艺:高速纺丝—低倍率高速拉伸;低速纺丝—高倍率高速拉伸。所得到的纤维都是FDY。比较了这二种工艺产品的性能和结构。并与普通的POY—DT及UDY—DT路线产品进行了对比。发现用高速纺丝低倍拉伸方法制得的纤维性质更好一些。而低速纺的方法实施起来更方便。在二种连续纺丝拉伸工艺中由于消除了"不同停留时间"的影响,其产品的染色均匀性都比间断的方法来得好。     

高速纺三叶异形超亮光涤纶染色影响因素的探讨

从冷却条件、上油工艺、辊间拉伸倍率和温度的选择等方面,对高速纺丝条件下影响55dtex/36f三叶异形超亮光涤纶全拉伸丝（PET FDY）染色因素进行了探讨,给出了提高染色M率的方法和建议．     

Supramolecular structures and dyeing properties of poly(ethylene terephthalate) industrial yarns for seat‐belt webbings

The effects of spinning conditions and additives on the physical and dyeing properties of poly(ethylene terephthalate) industrial yarns were investigated by analysing their supramolecular structures. Four poly(ethylene terephthalate) yarns for seat‐belt webbing were prepared with different formulations and under different spinning conditions. Instrumental characterisation of the internal morphologies and physical properties confirmed that the structural characteristics are influenced by the draw ratio, heat‐setting temperature and copolymer added, and that there are close correlations between the supramolecular structure and the physical and dyeing properties. In particular, the draw ratio was the most dominating factor, influencing both the mechanical properties and the dyeability.     

CKV453纺丝机生产PA6工业丝工艺探讨

探讨了在CKV45 3纺丝机上通过降低纺丝温度、提高纺丝速度和后道拉伸倍数等措施提高PA6工业丝的可拉伸性和质量 ,加大侧吹风速度来降低纤维的不匀率。得到的最佳工艺条件为熔体温度 2 85～2 87℃ ,纺丝速度 40 0～ 42 0m/min ,拉伸倍数 5 .2 5 ,侧吹风速度 0 .4～ 0 .8m/s。     

纺丝速度对聚乙交酯纤维结构的影响

采用差示扫描量热法(DSC)、广角X射线衍射(WAXD)、热失重(TGA)和偏光显微镜(PLM)等方法对聚乙交酯(PGA)纤维的结构进行了分析。DSC和WAXD分析表明,低速纺丝高倍后拉伸的纤维结晶结构较为完善,而高速纺丝低倍后拉伸的纤维结晶状态较差。TGA和PLM分析表明,低速纺丝高倍后拉伸纤维的热稳定性能优于高速纺丝低倍后拉伸的纤维。采用低速纺丝高倍后拉伸的工艺路线可以得到具有较好结构的PGA纤维。