转杯纺纺制竹节纱的研制

分析了转杯纺纺制竹节纱的三种主要方案,并对其适用性进行了相应的比较,通过实际试纺16s竹节纱阐述了转杯纺纺制竹节纺的工艺流程、AUTOCORO-288转杯纺纱机纺制竹节纱的机构改造及参数设定情况.     

竹节纱的纺纱原理及常用纺纱方法研究

介绍了竹节纱研究的发展趋势,比较了四种纺纱原理,并重点论述了环锭纺竹节纱和转杯纺竹节纱的方法,和对纺制竹节纱的工艺和质量控制作了探讨.     

19.7tex粘胶转杯纺针织纱的纺制

采用转杯纺纱技术开发中细特粘胶针织纱,产品附加值高,经济效益好。通过对粘胶原料、前纺工艺流程及 参数、转环纺元件和工艺参数的合理选择,采用优化工艺纺制的19.7tex粘胶转杯纺针织纱质量优,产量高。     

19．7tex粘胶转杯纺针织纱的纺制

采用转杯纺纱技术开发中细特粘胶针织纱，产品附加值高，经济效益好。通过对粘胶原料、前纺工艺流程及参数、转环纺元件和工艺参数的合理选择，采用优化工艺纺制的19．7tex粘胶转杯纺针织纱质量优，产量高。     

转杯纺27.8tex Tencel针织纱工艺探讨

Tencel是一种全新的纤维素纤维．转杯纺Tencel针织纱条干好、棉结和粗、细结少，有利于突出其针织产品的风格特征．分析了在转杯纺设备上纺制27．8tex Tencel针织纱的工艺要点及降低断头率的措施．给出了各工序的主要纺纱工艺参数．并与环锭纺27．8tex Tencel针织纱作了质量对比，结果表明：除了强力稍低外，其它质量指标均较相同号数的环锭纱好。     

两级模糊模式优选转杯纺加工预氧化纤维工艺

采用模糊理论中的两级模糊模式,进行转杯纺加工预氧化纤维工艺方案的优选.通过各方案的试纺和纱线性能指标的测试,经过模糊优选,确定聚丙烯腈预氧化纤维转杯纺主要工艺参数.为合理选择工艺参数,提高转杯纺预氧化纤维纱的可纺性能和成纱质量提供一种比较有效的方法.     

转杯纺纺制花式纱方法的评述

根据转杯纺纱的特点,对转杯纺纺制花纱的研究进行了系统论述,展示国内外研究的一些方法,并提出了该领域的几个前沿课题。     

转杯纺棉氨复合纱工艺及其成纱性能研究——氨纶丝牵伸倍数对成纱性能的影响

介绍了转杯纺棉氨复合纱的纺纱原理，并在经过改装的转杯纺纱机上，选用两种规格的氨纶丝，通过调整氨纶丝的牵伸倍数纺制不同外观和性能的转杯纺棉氨复合纱。经纱线外观和性能的测试分析，表明氨纶丝牵伸倍数对转杯纺棉氨复合纱的外观和性能有一定的影响。     

棉条制备等因素对转杯积杂及成纱质量的影响

通过对棉条制备、分梳辊速度及锯齿工作角度、纺纱杯速度与转杯纺工艺过程及成纱质量的分析及实验，得出了纺杯积杂、纤维损伤、纤维伸直度及成纱质量与诸因素的关系，并进一讨论了所得结果及产生原因。     

转杯竹节纱竹节参数的理论研究

从转杯纺的凝聚和并合机理出发,对转杯竹节纱的竹节参数进行研究,得到了竹节纱竹节段线密度分布的规律和竹节长度值,并得到了竹节长度与粗节倍数的内在关系。     

气流纺开清棉工艺初步探讨

为适应气流纺所使用的低级原棉紧缺的状况,减少纺纱成本,从气流纺配棉和工艺参数调整方面入手,对气流纺开清棉工艺作了分析、改进,更好地实现了利用气流纺设备纺中号、粗号纱,取得了良好经济效益。     

TENSILE BEHAVIOUR OF ROTOR SPUN YARNS

This paper deals with the tensile behaviour of rotor spun yarns. Having regard to the spe-cial construction of rotor spun yarn, some modifications for Hearle's theory have been made inorder to apply Hearle' s theory to rotor spun yarn. The paper then goes into calculating thetensile curve and investigating the effect of main parameters and spinning conditions on thetensile behaviour of rotor spun yarn. It was found that the following facts are noteworthy forimproving the mechanical properties of rotor spun yarn: (1) Selecting suitable navel so as tocontrol the P. T. E. length within a reasonable range. (2) Improving the design of single fibresupply device to decrease the amount of spoiled fibre and hence increase the effective fibrelength. (3) Increasing spinning yarn tension without yarn break to enhance the fibre migrationratio. (4) For the rotor spun yarn of industrial use, it is the way to increase the yarn strengththat the rotor groove should be designed with the groove angle beneficial to decrease the yarnspecific volume.     

Study of Rotor Spun Basofil/Cotton Blended Yarn Quality Characteristics during Optimisation of Processing Parameters

Yarn quality characteristics are affected by processing parameters. A 36 tex rotor spun yarn of 50/50 Basofil/ cotton （B/C） blended yarn was spun, and the spinning process optimised for rotor speed, opening roller speed and twist factor. Selected yarn characteristics were studied during the optimization process. During the optimizations process yarn elongation and hairiness reduced with increase in rotor speed. Tenacity increased with increase of rotor speed. The increase in TF caused tenacity and CV of count to increase up to a peak and then started to decrease with further increase of TF.While TF caused an increase in yarn hairiness, elongation decreased to a minimum level and then started to increase with further increase of TF. CV of count and hairiness increased with increase in opening roller speed, but tenacity and elongation decreased with increase in opening roller speed. The optimization process yielded the optimum levels for rotor speed, opening roller speed and twist factor （TF） as 45,000 rpm, 6,500 rpm and 450 respectively. As per uster Standards the optimum yam showed good results for CV of count, CV of tenacity and thin places/km.     

BALANCING TORQUE OF SINGLES COTTON ROTOR YARNS

This paper reports a recent development of a yarn modification process to produce torque balanced singles spun yarns. Taking advantages of the core-sheath structure of unconventional spun yarns, we have developed a yarn modification process and applied it to singles yarns spun by rotor spinning. Torque free singles yarns have been produced from 100% cotton fibers. The spirality of resultant single jersey knit fabrics has been greatly reduced or, in some cases, completely eliminated. Properties and performance characteristics of both parent and modified yarns as well as their resultant fabrics have been evaluated including the yarn tensile properties, surface properties, handle, air permeability, burst strength, and pilling resistance of the fabrics.     

喷气纱径向结构研究

采用汉密尔顿转移指数方法分析了喷气纱、环锭纱截面内纤维的径向分布规律,通过转移指数的计算得出了涤棉混纺喷气纱中包缠纤维和纱芯的基本组成及涤纶纤维线密度对包缠纤维数量的影响。     

低档兔毛纺纱工艺路线探索

低档兔毛纤维短,本文采用棉型纺纱系统,可以纺制18 tex以细的纱,这样有利于开发薄型产品。但纯兔毛纱强力较小,可用涤丝包芯方式采加固。产品经济实惠,适合内销市场需要。本文工艺采用短流程,基本上在棉纺设备上加以改装后纺制成纱。     

转杯速度与成纱质量关系的研究

本文探讨了国产转杯纺纱器的转杯速度与成纱质量的关系,采用经过优化的转杯、隔离盘和假捻盘进行纺纱。试验结果表明,随着转杯速度的提高,成纱质量基本上呈下降趋势。但在杯速为50000 r/min 左右时,成纱质量的几项主要指标最佳。这对于合理设计转杯速度具有一定的参考价值。     

圆盘式旋流纺纱的工艺分析

介绍了圆盘式旋流纺纱的装置和流程，探讨了影响圆盘式旋流纺纱成纱性能的主要工艺参数，成功地纺制了包芯纱．为了解和掌握圆盘式旋流纺纱设备的纺纱性能、工艺特点，对所纺纱线的强度和耐磨性进行了测试．根据测试结果，分析了圆盘式旋流纺纱的主要工艺参数与成纱性能之间的关系，发现第一喷嘴压力、第二喷嘴压力、梳辊转速、喂棉量、棉条号数、喂入张力、芯纱退绕张力是圆盘式旋流纺纱的主要工艺参数．     

管道纺纱主要工艺参数的优化

管道纺纱是一种新研究出来的自由端纺纱方法,要能实际纺纱还必须合理地选择其工艺参数.本文分析了影响管道纺纱的主要工艺参数.采用二次旋转组合设计方法,通过实验,建立了主要工艺参数与成纱强力的数学模型,确定了相应的约束条件.并采用惩罚函数法进行优化计算,求得最佳工艺条件.再根据优化计算出来的工艺条件,在管道纺纱单头试验机上实际纺制28tex纯棉纱.不仅能稳定地纺纱,而且其纱强力与优化计算结果基本一致.