全聚纺与网格圈紧密纺成纱质量对比

探讨了全聚纺与网格圈型紧密纺的装置结构及其成纱机理。采用全聚纺装置、三罗拉网格圈型紧密纺装置、四罗拉网格圈型紧密纺装置在相同工艺条件下分别纺制精梳纯棉7.4 tex、11.7 tex、19.4 tex纱线和紧密赛络纺18.2 tex、11.7 tex精梳纯棉纱线,并对纱线性能进行对比分析。分析结果表明:全聚纺相比三罗拉、四罗拉网格圈紧密纺在加工高支纱上具有一定的优势。     

原色与脱色牦牛绒精梳纯纺纱工艺研究

针对牦牛绒纤维主体长度短、长度离散度大、含有大量粗死毛等导致无法使用现有毛精纺设备实现精梳制条的问题,通过采用便捷喂毛、高效预梳、低损伤分梳、落物充分回收装置组成高效分梳机构,将卷曲、块状绒团拉伸为基本伸直的单纤维状。在细纱工序,分别采用环锭纺、网格圈紧密纺、全聚纺纺制原色和脱色牦牛绒单纱和赛络纱,并对成纱质量进行测试分析。结果表明:16.7 tex牦牛绒纯纺纱采用环锭纺时由于断头多而导致无法正常纺纱;与网格圈紧密纺相比,全聚纺所纺原色牦牛绒纱的强伸性和条干有所改善,但毛羽质量略差;与原色牦牛绒相比,脱色牦牛绒纯纺纱的综合性能有所下降,尤其是成纱强力有所降低;与网格圈型紧密纺相比,全聚纺由于实现了对牵伸后的纤维须条的平行集聚,更有利于对脱色后强力较低的牦牛绒纤维实现更加柔性、平稳的集聚加工。     

应用灰色聚类方法评价特种动物纤维综合物理性能

为更好地开发特种动物纤维制品,以骆驼绒、山羊绒及牦牛绒为研究对象,在相同环境下分别对9种动物纤维的长度、细度、强力、卷曲性能及摩擦性能进行测试,利用灰色聚类分析评价特种动物纤维的综合物理性能。以白山羊绒、黄骆驼绒和黑牦牛绒为原料,采用四罗拉网格圈集聚纺分别纺制线密度为14.29 tex 和20.83 tex纱线,并进行性能测试和对比分析,进一步验证灰色聚类方法评价特种动物纤维综合物理性能的结果。结果表明:白山羊绒、驼绒具有较好的物理性能,白羊羔绒次之,紫山羊绒、青牦牛绒、黑牦牛绒、青山羊绒和脱色牦牛绒的物理性能最差;采用四罗拉网格圈紧密纺纺制不同线密度的纱线,白山羊绒纱线的整体性能最好,黄骆驼绒纱线次之,黑牦牛绒纱线最差,与灰色聚类方法所评价的纤维综合物理性能一致。     

高支牦牛绒精梳混纺纱生产工艺研究

由于牦牛绒纤维的长度短、长度离散率大,很难实现牦牛绒纯纺高支纱的生产,因此文章采用脱色牦牛绒纤维与丝光羊毛纤维、蚕丝纤维和水溶性维纶纤维进行混纺,以提高牦牛绒纤维的可纺性。采用毛纺、棉纺设备相结合,纺制130 Nm的牦牛绒混纺高支纱,且水溶溶解后,纱线支数达到185 Nm。细纱机采用四罗拉网格圈型紧密纺装置,使得纱线中纤维轴向集聚,毛羽减少,条干均匀度提高,并且对纱线的强力、条干、毛羽进行测试分析。结果表明:通过合理设置各工序工艺,实现了牦牛绒混纺开发高支纱的可能,且纱线各项性能经过测试,符合机织围巾用纱的要求。     

全聚纺与四罗拉网格圈紧密纺集聚区纤维运动分析

对紧密纺集聚区集聚纤维的运动状态以及不同运动轨迹对于成纱质量的影响进行分析。选择DTM129型全聚纺细纱机与四罗拉网格圈紧密纺细纱机进行纺纱试验,分别纺制棉、粘胶、涤棉混纺3种原料的纱线。在纺制过程中,利用高速摄影机对集聚区运动须条进行拍摄,并运用AutoCAD软件获取集聚须条的运动轨迹。通过分析对比得出结论:全聚纺细纱机所纺纱线的条干性能较优,四罗拉网格圈紧密纺细纱机所纺纱线的毛羽、强力性能较优。     

牦牛绒/羊毛高支混纺纱的开发研究

探讨牦牛绒与羊毛混纺高支纱的生产工艺和混纺纱线性能。利用毛纺、棉纺设备相结合,通过在细纱工序采用四罗拉网格圈型紧密纺纱方式,分别纺制16.7tex羊毛/牦牛绒70/30、50/50混纺纱,并对纱线强力、条干等指标进行了测试,与16.7tex纯纺牦牛绒纱进行对比。结果表明:牦牛绒与羊毛混纺后,纱线强力、条干均匀性均得到了很大程度的提高,就纺制的两种不同比例的羊毛/牦牛绒混纺纱线而言,随着牦牛绒混纺比增加,纱线的强力提高,条干均匀度恶化。牦牛绒与羊毛混纺后,改善了牦牛绒纤维高支成纱的可纺性,拓展了牦牛绒纤维的应用领域,有利于开发不同风格的牦牛绒纱线。     

集聚纺纱方式对纱线性能的影响

为了探究集聚纺纱方式对纱线性能的影响,采用以传统环锭纺为基础的四罗拉网格圈紧密纺、紧密赛络纺、全聚纺及低扭矩纺四种集聚纺纱方式纺制了28.1、18.5、14.7 tex的纯棉纱。通过对纯棉纱线的断裂强度、断裂伸长率、毛羽和条干均匀度等性能进行测试分析,探究了四种集聚纺纱方式对纱线性能产生影响的原因。实验结果表明:由于不同集聚纺纱方式的成纱结构特点不同,影响了纱线的内在性能。紧密赛络纺的成纱强力最高,全聚纺的成纱有益毛羽最多,低扭矩纱在假捻器的作用下纱线品质得到了提高其纱线条干最好,紧密赛络纺的纱线总毛羽数最少。     

全聚纺与四罗拉网格圈紧密纺针织物性能对比分析

为了研究全聚纺与四罗拉网格圈紧密纺针织物之间的性能差异,采用Phabr Ometer评价系统,分别对相同规格的4种天丝/长绒棉/精梳棉20/50/30、精梳棉/长绒棉20/80、涤纶/棉65/35和G100天丝全聚纺与四罗拉网格圈紧密纺针织物的基本风格指标进行了测试;并利用高速摄影仪对织物拉伸过程进行了稳定性分析。结果表明:全聚纺针织物相比于四罗拉网格圈紧密纺针织物拥有更好的硬挺度、柔软度和光滑度,但是四罗拉网格圈紧密纺针织物的悬垂性能和折皱回复性能则更好。全聚纺针织物与紧密纺针织物相对手感值之间差异性不大,紧密纺针织物的拉伸性能和稳定性要比全聚纺针织物好。     

全聚纺与网格圈紧密纺成纱质量对比

在QFA1528型细纱机上分别加装了全聚纺与网格圈型紧密纺系统,纺制纯棉纱线和粘胶纱线。对两种纱线的成纱条干、毛羽和强力进行对比分析。指出:两种纱线的趋势一致,全聚纺与网格圈型紧密纺相比,成纱毛羽稍差、强力相当、条干有所改善。     

集聚纺纱线结构对成纱质量的影响

为探讨紧密纺纱线的结构对成纱质量的影响,采用示踪纤维方法,在梳棉工序制得含有示踪纤维的生条,然后通过后道工序纺制成需要的纱线。在视频显微镜下通过观察纤维在成纱中的转移,来对比分析全聚纺与普通环锭纺、三罗拉网格圈紧密纺和四罗拉网格圈紧密纺4种纱线的结构特点。结果表明：全聚纺纱线中纤维平均径向位置最小,但纤维内外转移系数最大。在此基础上,根据所得数据给出纤维的包络线,并借助纤维的内外转移系数等特征参数,从理论上分析了不同纺纱方式下纱线结构对纱线强伸性能的影响。     

Influence of condensed spinning method on yarn property北大核心CSCD

In order to explore the effect of condensed spinning method on the yarn properties, the pure cotton yarn with 28. 1, 18. 5 and 14. 7 tex was spun by four kinds of condensed spinning methods based on traditional ring spinning such as four, roller lattice apron compact spinning, compact siro spinning, complete condensed spinning and low torque spinning. The breaking strength, breaking elongation, hairiness and evenness of the pure cotton yarn were tested and analyzed, and the reasons for the influence of four kinds of condensed spinning methods on yarn performance were explored. The experimental results show that the characteristics of the yarn structure by different condensed spinning methods will influence the inner properties of the yarn. The yarn spun with compact siro spinning has the highest strength, the yarn spun with complete condensed spinning has the most beneficial hairiness. The yarn quality of the low torque yarn is better under the effect of the false twister. It has the best evenness, and the yarn spun with compact siro spinning has the lowest total hairiness. © 2018 China Silk Association. All rights reserved.     

Research on pneumatic compact spun yarn quality

Compact spinning is one of the most important improvements of traditional ring spinning, which is implemented by adding a fiber condensing device to condense the fiber bundle and decrease the spinning triangle. Pneumatic compact spinning is the most widely used compact spinning method at present. Compact spinning with perforated drum and compact spinning with lattice apron are the two main kinds of pneumatic compact spinning. Therefore, in this paper, comparison analysis of yarn quality between compact spinning with perforated drum and compact spinning with lattice apron is presented. First, 9.7 tex cotton-combed yarn is spun in three different kinds of pneumatic compact spinning systems, including two kinds of compact spinning with perforated drum: Rieter’s COM4 and complete condensing spinning system (CCSS), and one lattice apron compact spinning system: Toyota’s four-line compact spinning. The test results of yarn qualities show that comparing with other two kinds of compact spinning systems, the yarn spun in CCSS has the best evenness, least long hairiness, and slightly lower strength. Then, the properties of spun yarns are analyzed using two methods. First, using Fluent Software, numerical simulations of three-dimensional flow field in condensing zone of three kinds of compact spinning system are presented, respectively. Second, the fiber movements in condensing zones are captured using high speed camera system OLYMPUS i-speed3.     

一种新型窄槽式负压空心罗拉全聚纺系统

本文给出了一种新型窄槽式负压空心罗拉紧密纺系统-全聚纺,并对该系统的结构组成、成纱特性进行了全面分析,最后通过在三家不同纺纱企业进行纺纱实验对全聚纺与网格圈型紧密纺成纱质量进行对比,指出：与网格圈型紧密纺相比,全聚纺成纱条干有所改善,在有害毛羽减少效果基本相同的前提下可保留丰富的短毛羽,成纱强力稍有降低,即成纱综合质量较好。同时,全聚纺系统运行维护成本低、能耗小,具有良好的市场推广应用价值。     

全聚纺涤棉混纺纱内纤维的径向分布

为研究全聚纺混纺纱中纤维的径向分布情况,采用环锭纺、网格圈型集聚纺和全聚纺3种方法纺制28.1tex涤棉混纺纱线,运用哈氏切片器切取三种混纺纱线样本,借助MOTTC B1型显微镜观察并采集样本中两种纤维的分布状况图,结合汉密尔顿（Hamilton）指数的方法分析,得到全聚纺混纺纱内涤纶纤维和棉纤维在纱截面内的内外转移趋势及分布规律。结果指出：利用传统环锭纺纺制的涤棉混纺纱,涤纶纤维有明显向纱芯转移的趋势,而网格圈型集聚纺,涤纶纤维向纱芯转移的趋势较传统环锭纺弱,全聚纺相对于网格圈型集聚纺而言,涤纶纤维分布更加随机,并且涤纶纤维有向纱外转移的趋势。     

Effects of lattice apron density on yarn qualities in Four-line compact spinning system

In the paper, using finite element method (FEM), the effects of lattice apron density on yarn qualities in Four-line compact spinning system were studied by analyzing the numerical simulations of the airflow velocity. Firstly, three different kinds of yarns, 18.2tex (32^S), 9.7tex (60^S), and 5.8tex (100^S), were spun on FA507B spinning frame equipped with lattice aprons of mesh size 150, 120, and 100, respectively. The hairiness, breaking strength, and evenness of spun yarns were tested and comparatively analyzed. Secondly, using FEM, the numerical simulations of the airflow velocity in the condensing zone were presented. The finite element model of condensing zone was constructed according to the physical parameters of the practical system. Then, the simulation of airflow velocities on five straight lines located in the front, middle, and back of condensing zone were given. It is shown that, in the whole condensing zone, for the lattice apron with mesh size 100, the direct transverse condensing force is high, but the assisted condensing force is low and disorder, which is not beneficial for yarn qualities. Compared to the lattice apron with mesh size 150, the usage of lattice apron with mesh size 120 may be beneficial for the high-count yarn condensing or the yarn condensing under the relatively lower negative pressures. Furthermore, taking the 9.7tex as an example, the trajectory of yarn movement in the condensing zone was given using high-speed camera system OLYMPUS i-speed3. Corresponding airflow velocities along the yarn movement path were presented.     

网格圈负压式集聚纺集聚区须条半自由端加捻机制

网格圈负压式集聚纺纱实践表明,在相同工艺条件下,纺制相同线密度的纱线,集聚纱捻度比环锭纱捻度高5％左右.为揭示此现象的形成机制,采用高速摄影技术,对直线形集聚斜槽集聚区须条的集聚情况进行拍摄,发现存在类似卷捻的现象.通过纺纱实验,对采用相同工艺纺制的相同线密度的集聚纱和环锭纱捻度进行对比,结果表明集聚区须条的附加捻度是...     

网格圈式紧密纺集聚负压对成纱性能的影响

探讨网格圈式紧密纺集聚负压对成纱性能的影响规律.在细纱机紧密纺改造机台,通过不同负压条件下分别纺制3种纱号的紧密纱,研究分析了集聚负压对成纱毛羽、强力和条干的影响.结果表明:3 mm以上有害毛羽随着负压的增大呈现逐渐减少的趋势;对成纱强力而言,采用较大的负压时提高中号紧密纱强力有利,而细号紧密纱则应选择适宜的负压;对条干而言,纺制较粗纱号的紧密纱负压应适当偏大;而纺制较细纱号的紧密纱负压则应该适当降低.     

嵌入式复合纱与环锭纱的性能对比分析

为了了解毛涤嵌入式复合纱的结构和性能特点及其与环锭纱的差异,在传统环锭细纱机上加装2个长丝喂入装置和2个粗纱喂入装置纺制毛涤嵌入式复合纱,在传统环锭细纱机上纺制环锭纱;在捻系数相同的条件下,纺制了29 tex的毛涤嵌入式复合纱和环锭纱,对两种成纱的力学性能、条干和毛羽进行了测试和对比分析.结果表明:毛涤嵌入式复合纱相比环锭纱,断裂强度、断裂伸长率高,条干CV值低,表面光洁,毛羽少.