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结合喷气涡流纺成纱原理和结构,分析了其与传统环锭纺在捻度测试上的差异,采用试验验证的方法,检验了喷气涡流纺纱线捻度测试方法,为喷气涡流纺纱线捻度的检测手段研究和效果分析提供借鉴。 相似文献
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介绍了喷气涡流纺纱的成纱原理,分析了喷气涡流纱的纱线结构和性能,发现喷气涡流纺纱线结构和强力更接近环锭纱,表面摩擦系数高于环锭纱和喷气纱,而毛羽却远低于环锭纱和喷气纱。 相似文献
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介绍了Lyocell竹浆纤维的研制背景、纤维特性以及喷气涡流纺的纺纱原理,探索了Lyocell竹浆纤维喷气涡流纺纱线的性能,通过电镜照片及USTER条干测试可以看出,喷气涡流纺纱线具有明显的包缠结构,利用喷气涡流纺开发的Lyocell竹浆纤维纱线条干好,并可有效减少纱线毛羽;与传统针织物相比,采用Lyocell竹浆纤维喷气涡流纺纱线生产的针织物柔软舒适,具有较好的抗起球耐摩擦性能.结果表明,利用喷气涡流纺技术开发Lyocell竹浆纤维针织产品具有良好的市场前景及环境效益. 相似文献
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现在工业化的纺纱方式为环锭纺、转杯纺和喷气纺。每种纺纱技术都有其典型的纱线结构,纱线结构决定了纱线的特性及下游和最终纺织品的特性。具有更好手感的面料无疑采用精梳环锭纺纱线。为了生产柔软转杯纱,捻度设置要低,并且在织物整理过程中需要采取一定的辅助措施。通过采用新一代纺纱箱和纺纱组件,转杯纺具有很大的潜力来减小捻度,这也是针织物获得柔软手感的基本先决条件。喷气纺正从100%粘胶纱向新的应用领域针织用混纺棉纱和100%精梳纱发展。这都是对传统环锭纺纱线柔软性的挑战。本研究针对转杯纺和喷气纺织物采用不同方法去实现与环锭纺纱织物相当手感的织物。该项研究在转杯纺和喷气纺高产低成本方面也有一定价值。 相似文献
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针对喷气涡流纺纱技术气流加捻过程中落纤率较高导致纱线细节较多以及纱线结构中芯纤维平行伸直导致纱线强力较低的问题,提出自捻型喷气涡流纺纱技术,依据动摩擦原理,采用镭射激光加工处理,增大自由端纤维与空心锭接触面之间的动摩擦力,实现纤维在空心锭表面旋转运动过程中自身发生扭转后包缠到纱线中,增大纤维间的抱合力。同时基于流体力学模拟和样纱试纺实验,对比分析了传统型喷气涡流纺和自捻型喷气涡流纺空心锭结构参数、喷嘴内部近壁面处的流场特征和纱线结构性能,验证了自捻型喷气涡流纺纱技术的可行性。 相似文献
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为研究纤维规格对喷气涡流纺纱线中纤维径向分布的影响规律,将两种不同规格的羊绒纤维和同一棉型涤纶纤维分别以相同比例混纺,经喷气涡流纺纱机MVS861制备了两种羊绒/涤纶纤维混纺纱线。运用哈氏切片器切取两种混纺纱线的横截面样本,借助扫描电子显微镜观察并采集纱线样品横截面的纤维分布图,结合汉密尔顿指数分析法和Onion指数法分析,得到喷气涡流纺混纺纱中羊绒纤维和涤纶纤维在纱线横截面内的内外转移趋势和分布规律。结果表明,利用喷气涡流纺纱技术制得的羊绒/涤纶混纺纱线中,羊绒纤维因其初始模量更小、长度更长有向外转移趋势,初始模量更大、长度更短的涤纶纤维则有向内转移趋势;但混纺纱的最外层纤维由纤维含量和纤维规格共同决定。该结论可帮助纺制喷气涡流纺羊绒混纺纱时根据需要来选择纤维原料的规格。 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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选择羊绒、羊毛和涤纶长丝在传统的环锭纺系统上进行三组分复合纺纱。通过改变三组分的喂入位置、喂入张力来获得不同结构和风格的纱线。试纺了不同捻度和混纺比的3种复合结构纱,即股线、包芯和包缠结构纱,分析了其拉伸性能。纺纱实验和测量结果表明:通过复合改善了羊绒纱的强度;纱线拉伸性能与混纺比、捻度、纱线结构之间存在相关;随着捻度的增加,3种结构复合纱的拉伸性能均符合经典临界捻度理论;复合纱的力学性能因结构不同而不同,股线结构纱拉伸性能最好,包芯结构纱次之,包缠结构纱拉伸性能则最差。 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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为研究高速涡流对环锭纺成纱质量的影响,在环锭细纱机前钳口至导纱钩之间安装了自制的高速涡流装置;采用6种气流加压量对4种不同线密度纱进行纺纱试验,并对成纱质量进行了对比分析。结果表明在Z捻纺纱情况下,细纱有害毛羽减少量达到55.2%-60.8%;强力增加6.8%~10.8%,且随着气流加压量的增大,成纱强力先增加后降低;细纱实际捻度下降8.1%~10.7%,纱线细度越小实际捻度下降幅度越大;对细纱条干影响不大。 相似文献
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为改善基于金属丝的织物导电线路的特性,采用了一种改进的喷气涡流纺纱方法,制备出面向织物导电线路的,以超细金属丝(直径50 μm)为芯丝的包芯纱,并对其结构与电学、力学性能进行了分析。所设计的喷气涡流纺纱装置可以250 m/min的纺纱速度实现对芯丝为超细金属丝的包芯纱的连续制备;制备的喷气涡流纺金属丝包芯纱结构从内到外依次为金属丝、平行无捻的芯纤维及包缠纤维;金属丝在包芯纱横截面中的位置分布以位于中心至距三分之一位置区间和距中心三分之一至三分之二位置区间类型为主;喷气涡流纺金属丝包芯纱的断裂强力比金属丝提高100%~200%,纤维的包缠形式与包缠量对包芯纱内部金属芯丝的电阻值变化率随伸长率的变化没有显著影响,表明喷气涡流纺金属丝包芯纱具有与原金属丝相接近的电学性能。 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