抗静电拉舍尔毛毯的工艺探讨

文中选择有机复合纤维和涤纶全牵伸丝合股的导电纤维,将其添加到以涤纶全牵伸丝为原料的拉舍尔毛毯的地组织中,介绍了其编织设备及组织结构,并对衬纬组织添加导电纤维和编链组织添加导电纤维的两种编织方法进行了工艺分析,对产品的抗静电性能进行了测试.说明了应用导电纤维可以避免在编织过程中因静电带来的不良影响,减少了在染整过程中抗静电药剂对纤维、人体和环境的危害,在使用过程中保持抗静电效果.     

竹纤维针织物的性能测试与分析

介绍了竹纤维的理化性能和保健性能,对在42 E台车上用相同工艺编织的棉、竹和黏胶织物的规格和物理机械性能进行了测试,分析了织物的染色、手感、抗折皱、织物单纱强力等指标,重点分析了编织工艺中线圈长度、线圈圈高、线圈圈距及密度对比系数对缩水率的影响.     

导电纤维针织物的编织工艺优化探讨

主要探讨纬编针织工艺对导电纤维编织难度的影响因素,提出以实验的方法对编织难度分级描述的评价方法.分析讨论了不锈钢金属、碳和镀银3种不同导电纤维在纬编单面平针和双罗纹组织的情况下,采用不同的编织工艺参数对编织难度的影响趋势,以实现编织工艺的优化,这也为合理选择导电纤维纱线和优化纬编编织工艺做出了新的尝试.     

编织衬经、衬纬纬编针织物的新方法

TBM-1圆纬机可用来编织各种类似的织物。图1表示其中最普通的一种,为衬经衬纬、平针织物。它由沿线圈纵行配置的经纱1和沿线圈横列在衬经纱与圈干之间配置的衬纬纱2、纬编线圈3及延展线4所组成。延展线覆盖在经纱背面,而圈干覆盖在衬纬纱的正面。TBM-1机上编织的另一些组织,是在上述结构的基础上构成,其区别在于线圈、延展线、悬弧以及衬经纱、衬纬纱配置的顺序等组合方式上有所不同。     

套圈时纱线张力(十八)

当套圈到针钩上时,它的张力将急剧增加。产生原因首先是由于套圈的线圈将从一列线圈中拉出,从坯布牵拉方向承受很大的力,而主要还是由于线圈圈干的周长与针钩周长不相适应。与此相联有必要使纱线转移     

单面大圆机弹力布的开发

一种新型弹力布花色组织的变化方法——大小线圈成花法,其织物的基本单元线圈是由平针、集圈、浮线的变化形成的,具有立体感、高弹性能。主要是采用包芯纱进行编织、浮线完成的。 现将其编织工艺扼要介绍如下,以便同     

宏弯光纤应变传感经编织物的设计

为开发一种利用宏弯原理测量人体呼吸和心跳的光纤传感织物,设计了以棉纱编织的经绒斜为地组织,以直径为1 000μm的聚合物光纤为衬纬纱的经编衬纬复合织物。通过光纤弯曲实验研究了光纤弯曲曲率半径与光信号衰减之间的关系,确定了衬纬光纤的初始弯曲曲率半径为10 mm,选择传感循环单元数为2;通过比较分析双梳经编织物组织的特点,确定了传感织物的地组织。在此基础上设计了织物垫纱运动图和线圈密度,并在手动经编小样织机上编织出传感织物;最后对这些织物进行了测试。结果表明,传感织物可通过电压值变化的形式反映出拉伸过程中光信号相对于织物形状的变化。     

碳纤维编织性能的研究

探讨了碳纤维在手动横机上编织纬平针和1＋1罗纹组织的难易程度和编织性能。指出,碳纤维模量高、纱线摩擦系数大、弯曲性能差、易脆断等性能是影响其编织的主要因素。通过调节给纱张力、弯纱深度、牵拉力等工艺参数,可改善碳纤维纱线的上机编织性能。通过对成圈过程中线圈曲率半径变化规律的分析,得出编织时最适宜的弯纱深度为13,且编织1＋1罗纹较编织纬平针容易。     

聚乳酸纤维纬编针织产品的研究及开发

研究了聚乳酸纤维纯纺纱线及与棉混纺纱线的力学性能,结合聚乳酸纤维设计编织了纬平针组织和不同垫纱比的3种衬垫组织,并对这几种面料的编织工艺和染整工艺进行了介绍.     

袜类三维模型生成编织参数方法及其应用

对于具有高精度设计要求的压力袜、医疗袜等定制产品,现有定制设计方法仅能保证足长、足高等关键数据准确性,存在无法全方位满足定制用户足部数据要求的问题。基于模拟编织的思想,提出了一种由袜子三维模型全自动生成模拟袜机编织的编织路径图的方法。其中编织路径图的生成方法为：采样点由袜口开始沿着采样轴方向在袜类三维模型表面迭代采样用以模拟圆袜机的逐圈编织,并在采样过程中根据采样轴与三维模型顶点法向量的夹角调整线圈高度,直至完成袜头部分的迭代采样。然后将得到的编织路径图进行编译,得到各线圈圈高参数以及各部段圈数参数。最后以该参数修改WLT-6F袜机编织所需的链文件进行上机编织。对比样品与输入三维模型的尺寸差距,其误差处于4.1%以内。     

一类张角问题的研究

将工程设计计算中常遇到的要在一定范围内求对一物体有最大张角的点的位置问题，抽象为在平面曲线上确定对曲线外一线段有最大张角的点的位置，应用微分几何中关于曲线密切圆与曲率半径的有关理论推证，寻找到视角与曲线密切圆半径的关系，得到了可用简单的几何作图或解析计算求已知线角点，张角值区间，最大或最小张角点等问题的一般结论和方法。     

基于纵向轮廓曲线的青年女性体型细分研究

提取了能用于青年女性体型分类的纵向轮廓曲线,包括矢状面和冠状面轮廓曲线。建立了用轮廓曲线特征点曲率半径进行青年女性体型分类的方法。在国标体型分类的基础上,进一步细分青年女性体型,从纵向轮廓曲线形态入手,分析曲线特征点曲率半径,应用K-means聚类算法进行动态聚类,将伪F统计量作为判别函数来确定最佳类数目,最终将纵向体型分为8类,量化区分了青年女性纵向体型差异,并提出一种新的体型标识：“国标体型+纵向体型”。     

An Investigation of the Penetration Force Profile of the Sewing Machine Needle Point

The distributions of the tangential and radial stresses acting on the yam of a fabric during sewing as the sewing needle is inserted into the fabric have been discussed by means of the mechanical principles of elasticity. The influence on the needle penetration force caused by the shape of the cross section and the profile curve at the needle point has also been investigated. It is suggested that five parameters. i.e., the mechanical properties of the textile material k, the variation ratio y' of the needle radius, the contacting arc length θ. the frictional coefficient μ and the sewing machine speed v are the main factors that determine the penetration force of the sewing needle. The variation ratio y', or the slope at any point of the needle profile, is the most important factor for needle design. Depending on the analysis of the forces acting on the needle surface, an optimum profile curve has been obtained. If this curve is used as a new sewing needle profile, the penetration force can possibly be reduced by up to 20%.     

Transverse fingernail curvature in adults: a quantitative evaluation and the influence of gender, age, and hand size and dominance

The nail plate's convex shape in both the longitudinal and transverse directions is thought to contribute to its mechanical rigidity, and overcurvature can be a symptom of local and/or systemic disorders. Although a number of methods to measure the longitudinal nail curvature have been proposed, evaluation of the transverse nail curvature has been largely limited to visual estimation of overcurved nail plates. The aim of this study was therefore to measure the transverse curvature of healthy adult fingernail plates and thereby provide a baseline range for 'normal curved' nail plates. In addition, the influence of gender, age, hand size and hand dominance on the transverse fingernail curvature was investigated. The transverse fingernail curvature in 92 men and 90 women (aged 21-90 years) was measured using a set of radius gauges, and the nail plate curvature was expressed as the radius of a circle whose curve most closely approximated that of the nail plate. ANOVA was used to investigate the influence of digit nature on curvature, whereas general linear model was used to assess the influence of gender, age, and hand length, breadth and dominance on transverse nail curvature. Subsequently, the influence of hand dominance and age was further examined by paired t-test and ANOVA, respectively. In this study, baseline values for the transverse nailplate curvature of the thumb, index, middle, ring and little fingers are presented. The thumbnail is the flattest, followed jointly by the index and middle fingernails, then the ring fingernail and finally the little fingernail. Transverse nail curvature is influenced by a person's gender, age, hand dominance and hand width, but not by hand length. Thus, nails are flatter in the dominant hand, in men, in older individuals and in those with wider hands.     

EFFECT OF CURVATURE AND SURFACE AREA ON COLORIMETER READINGS—A MODEL STUDY

The effect of sample curvature and surface area on colorimeter color readings was determined using samples with different radii of curvature (23.5, 28.5, 36.0, and 48.5 mm) on one side and flat on other side. No curvature effect was observed with an instrument having a small aperture (8 mm, Minolta chroma meter). An effect of surface area and curvature was observed for total color difference (ΔE), lightness (L) and chroma (C) but not hue angle with an instrument having a larger aperture (91 mm, Gardner XL-845). L and C increased with increasing surface area and radius of curvature while ΔE decreased with increasing surface area and radius of curvature. The data from this experimental work indicate that reducing the area ratio (ratio between curved and flat surface area of the text sample) to less than 1.023 by using a smaller aperture will eliminate significant effects of sample curvature on colorimeter color readings. Hue angle results were unaffected by the curvature and can be reported if the area ratio criterion cannot be met.     

织针针舌外侧曲线的探讨

分析了织针针舌外侧三类过渡曲线对织针成圈性能的影响,为“香蕉形”针舌外侧过渡曲线提供了理论依据。     

采用电子凸轮的多梳栉经编机成圈运动

为解决多梳栉经编机成圈机构运动链较长、整机适应性差的问题,采用电子凸轮驱动执行机构的传动方案实现多梳栉经编机槽针的复合运动。根据经编工艺、梳栉排布特点选定理论关键点位置,以拟合出槽针针钩点理论轨迹,其中锁边花梳栉针前垫纱理论关键点位置,低于针背垫纱理论关键点位置,且不能超过槽针针头圆弧半径大小。低速试验状态下,实测43/1 型经编机槽针针钩点运动轨迹。结果表明,地梳栉和贾卡梳栉排布区间实际关键点与理论关键点在Ｘ 方向的偏差在允许偏差±0.25mm范围内,花梳栉针背垫纱的偏差在X方向允许偏差在0~0.25mm范围内,锁边花梳栉针前垫纱的偏差在X方向允许偏差1.95mm 范围内,所有情况在Y方向的偏差都在允许的偏差范围±0.25mm内。     

38—A NEW METHOD FOR DETERMINING THE VARIANCE–LENGTH CURVE OF YARNS AND SLIVERS

A method is described for the determination of a large number of points on the variance–length curve with a high degree of accuracy and in a reasonably short period of time. A capacitance-type irregularity tester is employed, together with data-logging equipment for transferring details of strand linear density onto punched paper tape. Points on the variance–length curve can then be calculated by feeding this tape directly into a digital computer.     

One-step Fabrication of Cellulose/Graphene Conductive Paper

In this study,a straightforward,one-step wet-end formation process was employed to prepare cellulose/graphene conductive paper for antistatic packing materials.Cationic polyacrylamide was introduced into the cellulose/graphene slurry to improve the graphene loading on the surfaces of the cellulose fibers.The effect of the super calender process on the properties of the cellulose/graphene conductive paper was investigated.When 55 wt% graphene was added,the volume resistivity of the cellulose/graphene conductive paper was 94.70 W·cm,decreasing to 35.46 W·cm after the super calender process.The cellulose/graphene conductive paper possessed excellent anti-static ability and could be used as an anti-static material.     

The electromagnetic shielding properties of some conductive knitted fabrics produced on single or double needle bed of a flat knitting machine

In recent years, the use of electrical and electronic devices has grown rapidly. These devices cause electromagnetic interferences, which could threaten human life. In order to solve this problem, intensive research to develop textile surfaces having electromagnetic shielding properties continues. In this paper, we study textile surfaces knitted with conductive copper and stainless steel wires wrapped with acrylic yarns and also core yarns produced by using conductive yarns to test the electromagnetic shielding properties of the fabrics. It was concluded that the knitted structure of the fabrics affected the electromagnetic shielding effectiveness (EMSE). Besides, the fabrics knitted on a double needle bed of the knitting machine with higher amounts of conductive yarns and unit weights could not provide the targeted improvement in the EMSE values with respect to the fabrics produced on a single needle bed of the knitting machine.