Effect of elastane draft on the rheological modelling of elastane core spun yarn

The main purpose of modelling the yarn structure is to find relations that are more reliable giving the behaviour of the yarn starting from its components. In this paper, the identification of the mechanical behaviour of the elastic core spun yarns by a rheological modelling on the basis of pre-existent phenomenological models is presented. In this model, the elastic core spun yarn is considered as a viscoelastic material. The model is verified experimentally with two types of elastic core spun yarns 50/78 and 59/156 and a range of draft of five values for two types of yarn and two values of elastane count in dtex (78 and 156). Comparative analysis of the theoretical and experimental tensile curves indicates a high level of correlation between both data-sets. The effect of the elastane draw ratios on the parameters of this model is established in the second part of this paper. Our test results revealed that the elastane draft is one of the important factors influencing the elasticity and the viscosity of elastic core spun yarns.     

弹性织物中的应力/应变性能变化

对各种类型的弹力纱进行比较,并根据应用领域阐述其性能和特征。     

A study of the modelling and characterisation of compression garments for hypertrophic scarring after burns. Part 2: characterisation of compression garments

Compression therapy is the universally accepted treatment for the management of hypertrophic scarring after severe burns. A review of the type of treatments for burns and type of compression garments commercially available is discussed in Part 1 of this paper (Anand, Kanchi Govarthanam, & Gazioglu, in press). A refined model was also designed to predict the sub-garment pressure more accurately, irrespective of the shape and size of the limb (see Part 1, in press). The thermophysiological properties of the compression garment provide comfort by preserving body temperature and moisture output close to their normal levels. In this study, the dimensional, mechanical and thermophysiological properties of four fabrics procured from different sources were thoroughly studied and compared. The study was aimed at the determination of their suitability to be utilised for the management of hypertrophic scarring. It was established that one of the fabrics investigated possessed superior properties in comparison to the other three fabrics. It was also demonstrated that the characteristics of this particular fabric can be further enhanced for its suitability for use as a compression garment for this specific area of application.     

A study of the modelling and characterisation of compression garments for hypertrophic scarring after burns. Part 1: modelling of compression garments

Skin burns are usually caused by contact with fire, heat, electricity, light, radiation, hazardous chemicals and friction. The degree of the burn is classed based on the extent and depth of the burn. A third-degree burn is classed as a severe burn and compression therapy is universally accepted as the treatment to manage hypertrophic scarring caused after such burns. This paper describes the types of burns and the different types of treatments available and reviews the types of compression garments that are commercially available for the management of hypertrophic scarring after severe burns. The Laplace equation that is used to model a pattern-cutting chart has been refined to predict the sub-garment pressure more accurately, irrespective of the shape and size of the limb. This model’s accuracy was further validated by constructing garments for the arms and legs of a male volunteer and measuring the actual pressures by using a Kikuhime pressure measuring device.     

基于力敏发热的智能纺织品设计

采用石墨烯、碳纳米管、聚吡咯等导电导热材料,在两层织物的上层以方格形式印刷石墨烯涂料,下层织入导电纱线。运用多学科知识,采用上下层织物接触导通电路的方式,以压力为条件在接触区域产生热能的新颖电热原理,设计了具有受压局部发热且温度可调功能的新型智能纺织品,该纺织品具有可折叠变形、节能简约、安全度高、实用便捷等特点,可以用于食品的恒温保温、汽车飞机座椅加热、康复医疗等各种领域。文章从纱线材料、织物组织结构、电路分析等方面对智能纺织品进行设计研发。     

采用弹性纱缝制针织服装和袜品

德国Alterfil公司开发的高技术含量的缝纫线Alterfil 120能满足缝制紧身衣、内衣、泳装及袜品时对缝纫线的要求。同时介绍了采用弹性缝线缝制针织品时对缝纫针及其他设备的要求。     

聚酰胺／弹性纤维印花织物间歇式后水洗新特点

聚酰胺／弹性纤维印花织物已大大丰富了泳装的类型,但客户不断变化的颜色和设计要求对所有的印染厂而言永远是一个挑战。描述了一种聚酰胺／弹性纤维印花织物高效水洗后加工工艺。     

针织物弹性纱线织疵的起因

以紧身内衣为例定义了针织物的弹性纱线织疵.研究和评定了形成弹性织疵的影响因素.总结了生产工艺链中各个阶段的影响因素.     

含弹性纤维针织物的松弛整理新工艺

描述了由Benninger公司开发的能在实现针织坯布控制松弛的同时除去表面的硅油和针织油剂的新工艺。大量应用证明在无需热定型的情况下可进一步加工。新工艺适合于针织物连续开幅以及不连续绳状加工工艺。     

在横机上用无包覆弹力纱进行编织的生产技术

在横机上采用无包覆弹力纱进行编织是一个非常复杂的生产过程，论述了生产技术要点，目前，一些公司已经成功地在横机上编织出了带有无包覆弹力纱的织物。这种新原料和新技术的采用，无疑将拓展横机产品的应用领域，产品具有良好的应用前景。     

压力袜对人体下肢血流影响的研究

压力袜是缓解、治疗下肢静脉疾病简便有效的一种医用纺织品,其穿着安全性和有效性受到广泛关注.文章选择年轻女性作为研究对象,使用超声多普勒血流探测仪测量其穿着不同等级压力袜时下肢远端皮肤血流速度的变化,探讨了在穿着不同压力等级压力袜和在不同穿着时间情况下,压力袜对人体下肢远端足背处血流的影响.研究表明,压力袜的穿着对人体下...     

组合工艺的更高要求能否安全地得到满足

描述了一种用于棉和棉／弹性纤维混纺织物的安全的组合工艺——聚合物质高分子化工艺(3P)。组合工艺将酸性预处理与染色组合成一浴两步法．从而节省了大量的水、能量和化学物料及时间。只有使用Suhafon D和Solopol ZF才能保证在最安全的简单工艺下获得最好的染色效果。     

我国产业用纺织品发展现状

产业用纺织品是三大纺织品之一,文章分析了我国产业用纺织品的发展状况,从医疗卫生、土工合成、建筑、农渔业海洋业、交通运输和筛网等方面介绍了产业用纺织品的开发方向,并简要提出了生产中应注意的问题。     

An introduction to a new direct testing method for characterizing pressure in compression fabrics

A newly developed direct pressure measuring system known as the CRIM Pressure System was compared with a traditional direct measuring device, the PicoPress Compression System, for compression bandage and hosiery samples. PicoPress measurements were taken both on the CRIM system and on research participants. Initial results indicated a good correlation between CRIM Pressure System and PicoPress participants’ measurements.     

An indirect testing approach for characterizing pressure profiles of compression bandages and hosiery

As outlined in compression therapy literature, the performance of a compression textile can be characterized by its stiffness and interface pressure. In this study, an indirect approach for measuring pressure from a set of compression bandages and hosiery was developed, from which rigidity (EI) values were determined, and tension–elongation curves and pressure-elongation data were calculated. The calculated pressure values were compared against PicoPress sensor readings measured on 10 participants. Results showed that the correlation between both approaches varied among bandage and hosiery samples.     

聚氨酯纤维（弹性纤维）展望

PCI纤维预测今后5年全球弹性纤维增长将超过10万t。增长的市场范围（地区以及使用部分）是充满机会的环境。中国猛烈增长的产能有可能使全球市场不稳定,危及商品化。但品牌弹性纤维供应商很好地防御了这种迹象,保护聚氨酯纤维的声誉,且与提高的性能、质量和价值相结合。     

Effect of elastane linear density and draft ratio on the physical and mechanical properties of core-spun cotton yarns

The aim of this study was to investigate the effect of elastane linear density and draft ratio on the physical and mechanical properties of core-spun yarns. Twenty yarn samples were prepared on industrial scale in a spinning mill with two different yarn linear densities, each with different two elastane deniers and five draft ratios. It was found that core-spun yarn’s tenacity, elongation and hairiness are affected not only by the overall yarn linear density but also by the elastane linear density and the draft ratio. However, the effect of elastane linear density and draft ratio was not found to be statistically significant on the yarn mass variations and total imperfections, which are only affected by the overall yarn liner density. A statistically significant interaction for yarn elongation at break was found between the yarn liner density and the elastane linear density concluding that elastane linear density used in the core must be compatible with the overall yarn liner density for attaining the best yarn elongation.     

成功进行PA/EL带状织物连续整理的建议

时尚内衣(包括文胸)主要由聚酰胺/弹性纤维混纺织物制成。含有较高弹性纤维成分的超细纤维物品,由于具有出色的高功能性和多用途服用性,故在纺织品市场上越来越受到重视。这种混纺织物集优良的穿着舒适性及时尚设计于一体,但对于纺织品整理者而言,却是一个挑战。特别是对于女式贴身内衣,必须确保基布的色深、牢度性质和抗黄变水平与相应带状织物一致。介绍了成功进行带状织物连续整理的途径。     

远红外保健纺织品的探讨

本文从作用原理、影响因素和品质评定三个方面对远红外保健纺织品开发中存在的问题进行了探讨,并从使用温度、反射、评价内容等方面提出了对该类产品改进的一些设想.     

不同温度条件对氨纶丝蠕变性能的影响

将不同细度的氨纶丝在不同温度下预置3h,然后在环境温度下平衡24h,用悬挂法手动测量氨纶丝的蠕变性能,得出不同条件下氨纶丝的蠕变规律是一致的,但在环境温度比较接近的情况下,即使此前经过不同预置温度的处理,试样的蠕变变形率也会比较接近,但在环境温度差异较大时,其蠕变变形率存在一定的差异。