转杯纺棉氨复合纱的工艺优化

分析了纺杯速度、氨纶丝牵伸倍数及捻系数对转杯纺棉氨复合纱强伸性能、弹性回复性、条干及成纱毛羽的影响,通过正交试验对工艺参数进行了优化.C 58 tex(77.8 dtex)转杯纺棉氨复合纱的性能测试结果表明:氨纶丝牵伸倍数对复合纱弹性回复率影响显著,对断裂强力和断裂伸长率有一定影响;纺杯速度对复合纱弹性回复率和毛羽有一定影响;纱线设计捻系数对复合纱弹性回复率和条干CV值有一定影响;其中以氨纶丝牵伸倍数对复合纱性能的影响比较大.综合考虑转杯纺棉氨复合纱各项性能,工艺配置以纺杯速度49 300r/min、氨纶丝牵伸倍数4.5倍、纱线设计捻系数500为宜.     

亚麻Lyocell混纺纱转杯纺工艺研究

探讨亚麻Lyocell混纺转杯针织纱的生产工艺。通过对亚麻原料预处理、选择合理的原料混和工艺、前纺各工序优选工艺参数和采取必要的技术措施,并对分梳辊速度、纺杯直径与转速、捻系数、阻捻盘形式及纺纱张力等转杯纺工艺进行了优选,结果使纺纱顺利进行,质量得到提高。亚麻/Lyocell 70/30 24 tex混纺转杯针织纱的较优转杯纺工艺参数为:转杯速度45 000 r/mim,分梳辊速度7 300 r/min,捻系数370。     

转杯纺假捻盘的应用

假捻盘是转杯纺纱关键零件之一。本文叙述了假捻盘的特征、效果、安装位置以及应扇中的有关事项。     

转杯纺不锈钢丝包芯纱的纺制

探讨转杯纺不锈钢丝包芯纱的生产工艺.介绍了转杯纺不锈钢丝包芯纱的生产原理,通过对转杯纺纱机进行改造并正确配置不锈钢丝喂入张力、分梳辊转速、转杯直径及转速、捻系数、阻捻盘规格以及卷绕张力等工艺参数,最终成功纺制出36.4 tex(33.3 dtex)转杯纺不锈钢丝包芯纱,该纱包芯效果良好,条干均匀,强力较高,毛羽较少,质量达到了较好水平.     

棉舒弹丝36.6tex转杯纺弹力纱的生产实践

探讨棉/舒弹丝60/40 36.6 tex转杯纺弹力纱的生产工艺。介绍了舒弹丝及其混纺弹力纱的性能特点。采用棉包混棉、三道并条,并对转杯纺分梳辊和转杯型号与速度、成纱捻度以及阻捻盘型号等工艺进行优选试验。最终成功纺制出棉/舒弹丝60/40 36.6 tex转杯纺弹力纱,较好地满足了产品开发的质量要求。     

转杯纺高效工艺的探讨

》》就"重定量、大牵伸、高速度的高效工艺"而言,转杯纺和传统环锭纺有着不同的内涵和发展途径.转杯纺高效工艺的核心是高速化.重定量、大牵伸工艺也同样能给转杯纺带来高效.     

转杯纺在毛纺行业中的应用

概述了国内外转杯纺的发展及转杯纺用于毛纺行业的意义和前，同时和种将来可以开发的毛织品种 。     

转杯纺的标准化

转杯纺是目前新型纺纱中应用面最广的一种纱线,随着其技术的不断进步,其应用领域也将不断扩大。为了提高转杯纱的质量,根据国家纺织行业标准,对转杯纺纱机机械术语、转杯纺纱机及其关键零部件、转杯纱的标准进行总结分析,这将对转杯纺纱机及转杯纱质量检测时提供有利参考。     

转杯纺假捻盘捻陷作用分析

因关于转杯纺假捻盘的阻捻及捻陷作用的研究尚存争议,为此,在分析转杯纺假捻盘两段纱条的运动以及建立加捻区的捻度变化模型的基础上,对假捻盘的阻捻及捻陷作用进行系统地研究。首先,定义了纱条的公转运动以及自转运动的概念,经分析认为假捻盘存在捻陷作用,但不存在阻捻作用。之后,制作了实验装置,采用模拟实验的方法进一步研究了假捻盘的捻陷作用,得到了捻陷作用发生时纱条的捻度传递曲线。研究结果表明,随着纱条张力的增大,捻陷作用不易发生。     

Effect of elastane draft on the rheological modelling of elastane core spun yarn

The main purpose of modelling the yarn structure is to find relations that are more reliable giving the behaviour of the yarn starting from its components. In this paper, the identification of the mechanical behaviour of the elastic core spun yarns by a rheological modelling on the basis of pre-existent phenomenological models is presented. In this model, the elastic core spun yarn is considered as a viscoelastic material. The model is verified experimentally with two types of elastic core spun yarns 50/78 and 59/156 and a range of draft of five values for two types of yarn and two values of elastane count in dtex (78 and 156). Comparative analysis of the theoretical and experimental tensile curves indicates a high level of correlation between both data-sets. The effect of the elastane draw ratios on the parameters of this model is established in the second part of this paper. Our test results revealed that the elastane draft is one of the important factors influencing the elasticity and the viscosity of elastic core spun yarns.     

新型半自动转杯纺纱机

立达(Rieter)集团的BT系列机器以产量高、适用范围广以及稳定性好著称.新设计的型号为BT 923的半自动转杯纺纱机可以生产出具有极高性价比的高质量转杯纺短纤纱.全新改进的BT 923引领着半自动机器的发展方向,并为半自动转杯纺纱机设定了新的衡量标准.     

A study of peeling-off tension in rotor spinning and its dependence on rotor and fibre variables part I: theoretical

While assessing the overall yarn tension in rotor spinning, most of the researchers have ignored the contribution of peeling-off tension (T₀) assuming this being small. However, experiments in the present study showed a significant discrepancy between the calculated and the measured mean yarn tension due to neglect of T₀. Further, T₀ has a bearing in twist propagation and compacting the fibres in the zone of Peripheral Twist Extent (PTE) for ensuring continuity of the yarn formation. In the present study, a theoretical deduction has been made to estimate T₀ by summing up the contributions due to fibre tension at the yarn formation point and the tension arising out of the length of the PTE sliding in the rotor groove. The dependence of T₀ on various rotor and fibre variables has also been established.     

A study of peeling-off tension in rotor spinning and its dependence on rotor and fibre variables,Part II: validation

By a series of experiments, the theory of the generation of yarn tension at the peeling-off point (T₀) during rotor spinning as postulated in Part I of the paper has been validated. Under the similar spinning conditions, if the mechanical tension (T_r) is kept constant, then the factors like fibre length, type, linear density, cross-sectional shape and its state of openness can be manipulated so as to increase T₀ and consequently, the yarn compactness. If a fibre has a lower rigidity in torsion, it will require less torque for twisting, leaving more torque available in the PTE, causing it to lengthen and resulting in the manifestation of higher tension at the peeling-off point.     

天竹27.8 tex转杯纱的开发

竹纤维具有抗菌、防臭等特性,其成纱吸湿性良好,凉爽、柔软、透气,文章对清棉、梳棉、并条和转杯纺工序纺制纯天竹纱的工艺措施及成纱质量作了介绍。     

传统型与双喂给转杯纺纺纱器及其成纱性能对比

针对传统型转杯纺因单分梳技术的限制只能纯纺或者混纺性能相近的纤维原料却难以生产纤维性能差异较大的混纺纱的问题,以及基于近年来双喂给双分梳新型转杯纺技术的研究,介绍了传统型转杯纺的成纱机制以及双喂给转杯纺技术的特点,并对比分析了传统型转杯纺纺纱器和双喂给转杯纺纺纱器的结构。通过数值模拟和样纱试纺实验,分析比较了传统型转杯纺和双喂给转杯纺转杯内部流场分布特征,包括转杯内涡流、气流速度以及压强分布,同时也进一步对比分析了2种转杯纺成纱系统所纺纱线的成纱结构及其成纱性能,验证了双喂给转杯纺纺纱技术的合理性和可行性。     

转杯纺纱法加工Lyocell针织纱

Lyocell纤维具有优良的物理机械性能,其针织面料在手感和外观等方面的多功能性使其开发应用前景非常广阔。由于转杯纱自身的特点,其针织品品质优越。采用转杯纺纱技术加工28 tex的Lyocell针织纱,探讨前纺工艺及技术措施;通过对各方案试纺对比,研究转杯纺主要工艺参数与成纱质量的关系,为合理选择工艺参数,提高Lyocell转杯纺针织纱的成纱质量提供参考。     

转杯色纺纱的纺纱实践

从原料选配与染色、混色方法的采用、并条工艺和转杯纺纱等方面,探讨了纯棉色纺纱的转杯纺技术,并与环锭色纺、转杯本色纺技术进行了比较。     

防治转杯纺粗节纱的探讨

针对两种粗节纱的产生原因,分别从设备机件、配棉工艺、纺纱器壳体等方面做了大量试验和分析研究,最后提出了相应的预防和减少措施。