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为研究环锭纺、转杯纺和喷气涡流纺3种不同成纱方法对混色纱中各色纤维混合效果的影响,分别使用3种成纱方法、2种条混方式(1道并条工序、3道并条工序)纺制6种混色纱,并制作6种混色纱的横截面切片样本,通过计算汉密尔顿指数,表征混色纱中各色纤维径向分布的均匀程度,分析不同成纱方法的纤维混合规律;同时测试6种混色纱的成纱性能,分析不同成纱方法混色纱的成纱质量。结果表明:转杯纺混色纱纤维混合效果优于环锭纺和喷气涡流纺,环锭纺次之,喷气涡流纺纤维混合最不均匀;经过3道并条工序的混色纱纤维混合效果优于经过1道并条工序的混色纱;环锭纺混色纱的强度最高,喷气涡流纺混色纱的毛羽最少。 相似文献
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Khurram Shehzad Akhtar Ali Afzal Wardah Anam Zulfiqar Ali Tanveer Hussain 《纺织学会志》2020,111(4):555-564
AbstractIn this study, the physical–mechanical properties of ring spun, ring compact, rotor and air-vortex yarns were investigated. The study was carried with yarn having linear densities of 24.4 tex and 36.7 tex, which were then converted to woven fabrics. The ring spun yarns have higher values of strength but also with higher strength irregularities. Extra-ordinarily low hairiness was observed in air-vortex yarns due to its unique yarn formation technique. The deviation rate (DR) of yarns have correlation with the mass spectrogram of respective yarns obtained from USTER Tester 5. Rotor and air-vortex yarns exhibited higher coefficient of friction. The woven fabrics made from ring spun yarns exhibited higher tensile and tear strength with higher elongation at break. The fabrics made from air-vortex yarns have very good pilling grade due to less protruding fibres on their surface and good structural integrity. 相似文献
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缆型纺纱技术是在环锭纺纱机前罗拉出口处有一个分割轮将其牵伸后的纤维须条分割成若干股纤维束,经过加捻形成新型结构的纱线.比较了8.8 tex和8.3 tex羊毛传统环锭纺纱线与缆型纺纱线的毛羽与耐磨性.试验结果表明,8.8 tex和8.3 tex羊毛缆型纺纱线的毛羽数少于传统环锭纺纱线的毛羽数,并且8.3 tex羊毛所形成纱线的毛羽数高于8.8 tex羊毛纱的毛羽数;缆型纱的耐磨次数高于传统纺纱线的耐磨次数,8.3 tex澳毛加工的缆型纱的耐磨次数高于8.8 tex澳毛缆型纱线的耐磨次数. 相似文献
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在相同工艺条件下,以5种不同后区牵伸倍数纺制了C18.2 tex和C14.6 tex纱,进行了纱线性能测试,分析了后区牵伸倍数对成纱质量的影响。结论是,后区牵伸倍数为1.38时,C18.2 tex和C14.6 tex纱质量最好,表明后区牵伸倍数趋近临界牵伸倍数时,成纱长毛羽少,条干CV值低,且粗细节、棉结少。 相似文献
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The study reports on the static failure behaviour of P/V blended ring, rotor and air-jet spun yarns explained on the basis of fibre failure coefficient. Fibre failure coefficient is an index introduced to represent fibre break and slip in combination occurring during tensile failure. Fibre break/slip during tensile failure is found dependent on fibre strength, fibre cohesiveness and internal structural developments in yarns. Tensile failure behaviour of ring, rotor and air-jet yarns found to be different owing to their difference in fibre consolidation mechanism. The contribution of individual components towards fibre failure coefficient varies with the spinning technology. An attempt has been made to develop mathematical models to explain the spun yarn failure behaviour under static condition. The developed mathematical models have incorporated the fibre property (fibre strength) and few structural characteristics of yarns which are strategically selected to justify the essence of models to enhance the prediction capability. Individual models are developed for ring, rotor and air-jet yarns owing to their structural changes caused by their inherent fibre consolidation mechanism. The developed mathematical models are free from assumptions and based on pure applied mathematics and have very high potential for prediction of spun yarn failure behaviour. 相似文献
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《纺织学会志》2013,104(5):429-434
Abstract Engineering of spun yarns having specific tensile, evenness and hairiness characteristics is a long-cherished dream of spinning technologists. Selection of suitable raw materials at minimum cost and optimisation of process parameters are the two major tasks to be achieved to manufacture engineered yarn. Advent of high-speed fibre-testing machines and development of powerful modelling tools such as artificial neural network (ANN) have provided a great impetus in the yarn engineering research. This article demonstrates the feasibility of yarn engineering by developing a yarn-to-fibre ‘reverse’ model, using ANN. This approach is entirely different from the prevailing forward models, which predict the properties of final yarn using the fibre properties as inputs. The cost minimisation of cotton fibre mix was ensured by using the classical linear programming approach in combination with ANN. The engineered yarns demonstrated good agreement with the target yarn properties. 相似文献
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为了探讨在棉纺生产中压力棒隔距块对成纱质量的影响,分析了压力棒隔距块的原理,并在FA506型环锭细纱机上加装不同型号的压力棒隔距块分别纺制出CJ9.7 tex、CJ7.3 tex纱线,测试纱线的毛羽、强力、条干等各项指标并进行对比分析。结果表明,在棉纺中使用压力棒隔距块后,成纱条干有所改善,成纱强力变化不大,成纱毛羽的变化也不明显。 相似文献
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为获得更高强力的喷气涡流纺纱线,通过引入涤纶长丝制备喷气涡流纺粘胶/涤纶包芯纱。采用统计分析等方法研究了芯丝线密度、纺纱速度对喷气涡流纺粘胶/涤纶包芯纱强伸性、条干不匀和毛羽的影响规律,同时对比分析了不同纺纱条件下包芯纱的结构外观。研究结果表明:芯丝线密度、纺纱速度对喷气涡流纺粘胶/涤纶包芯纱各性能响应值有不同程度的影响;纺纱速度过高或过低均不利于包芯纱成纱的强伸性提高和条干均匀性改善,纺纱速度的增加会使毛羽H值增大;在一定范围内,增加芯丝线密度有利于包芯纱强伸性的提高,随芯丝线密度的增加,包芯纱毛羽H值减小;此外,选用较大的芯丝线密度和较高的纺纱速度时,纺制的包芯纱芯丝外露现象越明显。 相似文献
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In this paper, a hybrid spinning system the so-called “rotor-jet spinning method” which utilizes the air-jet nozzle in rotor spinning process is presented. Thus, air-jet nozzles with different structures of 90S, 90Z, 60Z, and 30Z (the values of 90, 60, and 30 are orifice angles and S and Z are air rotational directions) were designed and constructed and then mounted between the take-up nozzle position and doffing tube in a rotor spinning machine. The air-jet pressure was changed at 0.2, 0.5, 0.8, 1, 1.2 and 1.5 bar values. The physical properties of cotton rotor-jet spun yarns with yarn count 20 Tex and nominal yarn twist of 938 TPM were investigated and compared with that of normal rotor-spun yarn. The experimental results indicated that by utilizing a 90Z air-jet nozzle at 1 bar air pressure, the highest yarn tensile strength, abrasion resistance, and twist, and lowest elongation are obtained compared with those of normal rotor as well as rotor-jet spun yarns with 30Z, 60Z, and 90S air-jet nozzle types. However, the rotor-jet spun yarn irregularity produced with 90Z air-jet nozzle is almost identical to normal rotor-spun yarn. It is also shown that the rotor-jet spun yarn hairiness properties which were produced with a 90Z air-jet nozzle at air pressure values of 0.2, 0.5 and 1 bar is almost similar to normal rotor-spun yarn while the lowest yarn hairiness is achieved at air pressure value of 0.8 bar. The experimental results of this paper suggest that the newly developed rotor-jet spun yarn is superior to normal rotor-spun yarn from the point of view of yarn tensile, abrasion resistance, twist, and partially hairiness properties. 相似文献
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为提高聚丙烯腈预氧化纤维的可纺性,改善其纱线性能,采用转杯纺纱技术纺制纱线,通过各方案试纺对比,研究了转杯纺主要工艺参数与成纱质量的关系,合理选择工艺参数,提高了聚丙烯腈预氧化纤维的成纱质量。采用PANOF转杯纱开发的织物在阻燃性、耐磨性方面明显优于环锭纱织物。 相似文献
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为研究旋流喷嘴纺纱方法对不同线密度纱线的减羽效果,借助计算流体软件模拟旋流喷嘴内部气流特性及不同线密度纱线在气流作用下的压强与速度分布,并用纺纱试验进行验证。模拟结果表明,进入纱道后的气流沿顺时针方向分别朝纱道入口及出口方向运动,纱线表面毛羽主要受到气流的包裹力和由于纱线自转而产生的相对包裹力作用。气流的旋转特性使得纱道管壁附近的压强高于轴线附近,因此不同线密度纱线的表面所处涡流的位置不同,受到的气流包裹力也不同。纱线线密度较小,表面受到的压强分布密集,x、y、z 向速度波动较大,其中20 tex 纱线表面的压强和速度分布情况优于10、30、40 tex 的。研究结果表明,旋流喷嘴压强在0.2 MPa 下,对20 tex 大麻/ 棉(40/60)的减羽效果最优,达到了87.6%,与数值模拟结果一致。 相似文献
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比较研究了以棉、聚酯纤维为原料、在不同的紧密纺系统上纺制的相应的 环锭纺和紧密纺纱线.结果表明紧密纺纱线与环锭纺纱线相比,弹性、拉伸性、耐磨性、刚度和紧密度较高,毛羽、条干不匀率和疵点较少,纱线直径较小.而且,紧密纺的弹性恢复参数比环锭纺要好得多.从改变比例的方面来说,RoCoS系统纺出来的纱线与Zinser和Suessen紧密纺系统纺出来的纱线相比较时,表现出弹性、直径和紧密度的改变量小,但是拉伸性变化大. 相似文献