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根据纤维力学性质建立加捻三角区有限元模型,利用ANSYS13.0软件对加捻三角区纤维变形进行模拟,结合纺纱实验分析了纤维变形对纱线性能的影响。以JC14.6tex环锭纱和赛络纱为例,得到了相同条件下,环锭纱和赛络纱纺制过程中加捻三角区内纤维的变形规律和实际纺制的两种纱线的性能指标,结果表明:加捻三角区内纤维变形沿着三角区中心线呈对称分布;纤维变形与加捻三角区的形状有密切关系;与环锭纺相比,赛络纺加捻三角区内纤维变形明显较小且变形一致性好;纤维变形对纱线的毛羽和强力有着重要影响。 相似文献
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Capillarity of clothes constitutes an efficient way to help men and women evaporate their sweat, and so keep their comfort by lowering their wetness. The mechanism of water transport from skin onto fabric for its evaporation is physically studied. A Cahn balance is used to measure the dynamic of such an effect, and to confirm the proposed theory. The results point out several parameters of the structure of a fabric that govern sticking and the capillary properties. 相似文献
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通过试验研究了赛络纺纱技术对芳砜纶纱线毛羽的减少情况。结果认为,赛络纺纱技术能够明显地减少芳砜纶纱线的成纱毛羽数量,尤其是4mm以上的长毛羽数量;并且发现,对试验的芳砜纶纤维来说,当喇叭口中心距为11mm时,成纱点稳定,成纱毛羽数量较少。文章给出了合理的工艺措施。 相似文献
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AbstractIn the ring-spinning process, the area between the front roller nip and twisting point is spinning triangle, and its geometry influences the fiber tension distribution in the spinning triangle directly and determines the properties of spun yarns. Therefore, in the paper, one kind of mechanical false-twisting device was introduced on the ring spinning, which can affect the twist propagation and change the spinning triangle geometry actively. First, the modification of the false-twisting device on the DTM129 ring-spinning frame was introduced. Taking the medium cotton yarn spinning as an example, corresponding ring yarn, Sirospun yarn, compact yarn were spun on the modified spinning frame under different designed twist factors, and the applicability of the false-twisting device on different spinning method was discussed. It is shown that comparing with the common yarn, the Hairiness and Strength of the modified yarns are all improved, and the effect of false-twisting device on yarn qualities is more effective for the low-twist yarn. Comparing with the ring spinning, the improvement degree of the modified compact spinning is a little smaller. Then, the long-staple cotton ring yarn, polyester and medium cotton blend ring yarn, polyester ring yarn were spun on the modified spinning frame under different designed twist factors, and the applicability of the false-twisting device on different fibers was discussed. It is shown that the influence of the false-twisting device on the long-staple cotton yarn and polyester yarn is little. That is, the false-twisting device given in the paper would be more applicable on the short fiber spinning under the low designed twist factor. 相似文献
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介绍了赛络纺纺纱理论的研究现状及纺纱理论研究的意义,对现有的几种成纱模型及理论进行了说明,提出了各理论的可取之处,分析了模型及理论中存在的缺陷,指出了纺纱理论分析中需要改进的方面. 相似文献
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Properties of spun yarns are mainly affected by fiber properties and yarn structure. Yarn structure is principally influenced by the spinning system. In fact, each spinning system tends to produce a distinctive yarn structure. Recent refinements in spinning technologies have yielded significant improvement in yarn structure. Siro, solo and compact spinning are the new spinning systems to have made a breakthrough until recently. Of the various structural parameters for staple yarns, fiber migration has a crucial influence on the yarn mechanical properties. Thus, the need for precise and concise information about fiber migration becomes important for better understanding of yarn structure and hence yarn mechanical behavior. The work presented here aims to analyze fiber migration in siro-, solo-, compact-, and conventional ring-spun yarns by varying the twist factor. The results demonstrate that the siro-spun yarns exhibit the highest fiber migration parameters, followed by compact-spun yarns, solo-spun yarns, and conventional ring-spun yarns. 相似文献
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本文主要回顾了低扭矩环锭纺纱技术的发展。通过讨论其纺纱三角区的特点,利用高速摄影技术对纺纱区捻度和张力分布的观察分析,系统地介绍了低扭矩纱的成纱原理。此外,结合示踪纤维技术,利用纱线结构连续测量分析系统对低扭矩环锭单纱和传统环锭单纱的内部结构进行分析,揭示了低扭矩纱独特的结构特点,如非同轴异形螺旋线结构,纤维片段局部反转现象等。这些特点解释了低扭矩纱及其织物具有优良物理性能的原因。同时,通过多个生产厂家提供的测试数据,对比分析了几代低扭矩环锭纱与传统环锭纱及其织物的物理性能,结果表明低扭矩环锭纱具有低捻高强、低残余扭矩和毛羽少等特点,其针织物经多次水洗后歪斜变形小和手感好,机织物具有较好的撕裂强力,断裂强力和耐磨擦性。最新一代低扭矩环锭纺纱技术显著地改善了高支纯棉纱的物理性能。 相似文献
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This paper examines empirical relationships between the geometrical parameters of the spinning triangle and the quality parameters of ring spun yarns. For this purpose, controlled variations in the geometry of the spinning triangle were induced using two existing modifications in the ring spinning process and by varying the yarn twist level. The geometrical parameters of the spinning triangle were measured using the clear rubber roller combined with digital image processing techniques as described in the first part of this study. The yarn quality parameters measured included yarn hairiness, strength, elongation and evenness. Yarn hairiness showed more noticeable sensitivity towards the physical shape of the spinning triangle than yarn tenacity, while yarn evenness and elongation were not significantly influenced by changes in spinning triangle geometry. 相似文献
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《纺织学报》2025,46(02)
为解决复合纱捻度高、残余扭矩大、扭结较多的问题,采用羊毛纤维、锦纶长丝为原料,结合自捻纺纱与低扭矩纺纱技术,制备了嵌入式同相自捻纱和异相自捻纱,对同相自捻纱进行受力分析,探究了嵌入长丝的角度/间距对复合自捻纱自捻扭矩的影响,分析了长丝与粗纱在不同间距下对2种自捻纱成纱性能的影响。结果表明:嵌入式异相自捻纱性能普遍优于同相自捻纱;随着长丝与粗纱间距增大,长丝包缠角度变大,对短纤维的束缚作用增强,提高了纤维强度利用率和成纱均匀度;当长丝与粗纱间距过大时,长丝对短纤维内外转移的调控作用减弱,纤维间抱合力减小,条干均匀度恶化;在2 mm间距时嵌入式自捻纱综合性能更优,异相自捻纱与同相自捻纱的断裂强度分别为9.79和6.63 cN/tex,条干CV值分别为19.16%和20.93%,3 mm毛羽数量分别为119根/(10 m)和102根/(10 m);嵌入式自捻纱充分利用长丝连续性和受力均匀性平衡退捻力矩,有效降低了复合纱线的残余扭矩(≤1个扭结/(25 cm))。 相似文献
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介绍了赛络纺纱技术在毛单纱织造中的应用 ,并从原料选用、加工工艺研究、工艺优化与控制等方面进行了分析 ,得到了一些在生产实践中具有一定指导作用的结论。 相似文献
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This paper examines the relationship between changes in the spinning triangle dimensions and evenness of the finally produced yarn. Three kinds of yarn (in different twist levels) were produced and during the spinning process a digital camera was used to record the production process and the triangle behaviour in front of delivery rollers. Using image-processing techniques, three parameters of the triangle (width, length and area) were measured. Then, the correlation between yarn irregularity and changes in the triangle dimensions (with regard to wavelength changes) were evaluated. The acceptable correlation between yarn irregularity and dimension changes indicated that this novel image-processing approach can be implemented in measuring yarn irregularities during the spinning process. 相似文献
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In this paper, a kind of airflow-twisting devices which can produce the twist by the high vortex airflow is employed for improving the twist propagation process of ring-spinning system. Firstly, three different kinds of yarns Ne20, Ne40, and Ne60 are spun in this modified ring-spinning system with five different airflow pressures and two different swirling directions, including anticlockwise and clockwise, and the qualities of spun yarns, including hairiness, strength, evenness, and number of snarling characterizing the yarn residual torque, are measured. Secondly, the images of spinning triangles are captured by using a high speed camera system OLYMPUS i-speed3, and the mechanism of the effects of vortex airflow on yarn qualities is discussed by analyzing the fiber tension distributions in the spinning triangle. It is shown that for the ‘Z’ twist spun yarn, the spinning triangle decreases with the increasing of clockwise airflow pressures, whereas the triangle becomes more and more symmetrical with the increasing of anticlockwise airflow pressures. Meanwhile, the comprehensive qualities of spun yarn are improved with the increasing of both directions of airflow pressures to a certain extent. However, the hairiness and strength of spun yarn will be mainly improved with clockwise airflow, whereas yarn residual torque mainly reduced with anticlockwise airflow. 相似文献
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为定量预测实际生产中赛络菲尔(Sirofil)包缠纱的性能,分析了其成纱加捻过程和特点。根据加捻三角区中的几何关系,推导出三角区纱线质心相对锭子偏移距离与纱线捻回角的关系,并得出半个捻回纱线质量的计算公式;对加捻三角区进行受力分析得到力矩平衡方程,解释了Z捻纱捻度由下向上的传递规律,分析了长丝与短纤须条的相对位置对Sirofil包缠纱强力的影响;最后对模型求解并进行实验验证。模型计算和实验结果表明:隔距变大纱线质心偏移距离变大,须条捻回角减小;汇聚点之上单纱捻向与汇聚点之下传递捻向相同,且短纤须条位于长丝左侧时所加的捻度较之在右侧时多。该模型和实验为Sirofil包缠纱性能和结构的分析提供了参考。 相似文献
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介绍了近年世界棉纱质量的发展现状及趋势,指出了针织用纱的质量要求日益提高。并结合我省针织用纱的质量状况,阐述了我省创针织用纱名牌应解决的生产技术关键及措施、建议。从而进一步稳定、提高针织用纱质量,赢得市场,争创名牌。 相似文献
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The physical shape or geometry of the spinning triangle directly affects the quality of ring spun yarns. This study developed a technique to measure the geometrical parameters of the spinning triangle during ring spinning using a combination of a clear rubber roller and digital image processing. The clear roller exposed the spinning triangle zone during the yarn spinning process in a non-invasive manner, and yarn properties were not affected. A digital camera recorded images of the spinning triangle. An image processing algorithm was then developed to process the images to measure the dynamic geometry of the spinning triangle. The method was able to effectively measure the width, height and skew of the spinning triangle along with changes in these parameters over time. This technique will be applied in a follow-up study to investigate the effects of the shape of the spinning triangle on yarn quality. 相似文献
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为更好地提高棉纤维的成纱性能,利用自主研发的假捻装置,在加装假捻装置的环锭细纱机上分别控制装置的速度、位置和纺纱方式,纺制了28.1 tex 棉纱,并对成纱质量进行了测试分析。测试结果表明:假捻器在纺纱过程中的最优转速为300 r/min,速度过大或过小都会影响纱线的强力和毛羽;假捻点与前罗拉钳口的连线和水平线之间夹角的正切值为0.7 时成纱效果最佳,假捻器的位置可改变纱路进而影响加捻三角区的大小和状态,纺纱过程中优选假捻器的合适位置有利于提高成纱质量;假捻器与斜位纺结合使用,改善了单一假捻纺纱情况下的纱线性能。 相似文献
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Porel纤维是一种改性聚酯、高仿棉纤维,具有良好的亲水吸湿性和导放湿性。通过与精梳棉混纺开发的赛络纺竹节纱,满足了针织面料对吸湿、透气、柔软的舒适性要求。在生产过程中,针对纤维的性能特点,纺前对Porel纤维进行预处理,对各工序采取一系列技术措施,最终开发出符合质量要求的Porel纤维/精梳棉赛络纺竹节纱,实践证明:该产品特性既具有吸湿快干的性能,又具有竹节纱、赛络纱的风格特征,满足了市场的要求。 相似文献
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叙述了转杯纺纺制亚麻粘胶混纺纱时亚麻的预处理、清棉梳棉的工艺措施、转机纺工艺和对纱线色差的控制问题. 相似文献