温湿度对纯棉织物折皱回复性影响的研究

文章针对纯棉织物折皱回复性差的问题,探讨了温湿度对纯棉织物折皱回复性能的影响。结果表明:在外力一定的情况下,纯棉织物的折皱回复角会随着温湿度的升高不同程度变小,织物的折皱回复性能下降。     

基于折痕特性的柔性结构展开过程分析

研究展开过程中的折痕特性,并在弹簧质点系统基础上,提出一种基于折痕展开特性的简化分析模型,将平行折叠的柔性结构转化为折痕上的质点及连接的弹簧．分析了折痕刚度对展开的影响,给出完全展开的判定准则及通用拓扑关系,并推导了理想展开时点的运动轨迹．应用本模型对正四边形柔性结构在边框张拉受力下进行展开分析,利用自编程序通过特定功能模块实现非理想展开过程仿真．仿真展开过程与理论轨迹基本相符,验证了分析模型的合理性．并对展开过程中的受力、变形进行分析,探讨了折痕刚度对模型展开的影响．拓展了弹簧质点系统的应用范围,为柔性结构的分析、建模及仿真给出建议．     

Evaluating the crease recovery performance of woven fabrics considering bending behaviour in various directions

Since the woven fabric is used on the 3D body, it encounters bending deformation and crease in various directions. Due to the prominence of these deformations in the appearance of the garment, the inspection of bending and crease recovery behaviour of fabric in different directions needs to be considered. In this paper, the evaluation of bending rigidity and crease recovery of fabrics is carried out in various directions. Analysis of the results revealed that fabric-bending rigidity could be expressed as a sinusoidal function of sample orientation towards warp direction. For all the studied fabrics, from warp axis to bias direction, bending rigidity follows a descending trend, however; crease recovery angle has an ascending tendency. Reverse variations were achieved for both properties from bias direction to weft axis due to the variant warp and weft yarn contributions in each direction. Hence, the lowest bending rigidity was obtained in the bias direction (45°), while the highest crease recovery angle was recorded for the mentioned direction. Moreover, an exponential function is utilized to express the non-linear relation between bending rigidity and the crease recovery in different directions of the fabric. The statistical analysis of the results clarified that the effect of fabric direction and structural parameters on the bending and crease recovery behaviour is significant in the confidence range of 95%.     

棉织物防皱整理的研究

以柠檬酸，柠檬酸铵做整理剂，ＮａＨ２ＰＯ４做催化剂，从整理剂浓度，催化剂浓度，焙烘条件三方面对棉织物防皱整理以织物折皱回复角及怕裂强力为指标进行了研究，结果表明，ＣＡ和ＡＣＴ作为无醛防皱整理剂具有较明显的效果，并得出，经ＣＡ整理后，织物断裂强力与折皱回复角之间的回归直线方程。     

真丝绸树脂整理防皱加工的研究

本文对几种典型树脂整理的防皱效果系统地进行了考察,同时探索了比较合理的真丝绸树脂整理加工的方法。 对不同的树脂种类,张力的大小,以及预烘焙烘工艺条件的差异所引起的静粘弹常数和交联度的变化,从机理上阐明了树脂整理的防皱效果。     

螺旋缝焊管常见质量问题及改进措施

介绍了螺旋缝焊管生产过程中常见的焊接质量问题以及管体压痕现象.分析了导致这些问题产生的部分原因,即焊接质量问题通常由带钢和焊剂质量问题引起的,而管体压痕是由成型力不合理所致.提出了相应的改进措施.     

棉织物抗皱整理剂进展(二)

介绍了棉织物抗皱整理的简史、意义、标准、作用机理和抗皱整理剂的研究状况；分析了双醛、醛(酰)胺缩合树脂、聚氨酯、双羟乙基砜、有机硅、壳聚糖、环氧树脂和多元羧酸抗皱整理剂的研究现状与开发趋势。     

棉织物我元羧酸整理后强力损伤的研究

棉织物多元羧酸整理后引起强力损失,其原因有两个,即酸催化降解纤维素和纤维与多元羧酸的交联,由多元羧酸的酸性引起的纤维素大分了链的催化降解是不可恢复的,它的强力损失与酸的种类、浓度、pH值、焙烘温度和时间有关,上多元羧酸与纤维素大分子交联引起的强力损失,随交联程度的提高而增加,酯7交联引起的强力损失在碱的作用下是可恢复的。     

液氨丝光和潮交联处理对纯棉色织物物理性能的影响

研究了液氨丝光和潮交联树脂定型后整理对纯棉色织物外观效果和缩水等物理性能的影响。试样经过整理后,用AATCC和ASTM标准对其相关物理性能进行检测。结果表明:利用液氨丝光和潮交联树脂定型后整理能使织物外观和平整度更加良好,缩水性能更加稳定和强力提高。     

Physical properties of silk fibers grafted with vinyltrimethoxysilane

Silk fibers from Bombyx mori silkworms were grafted using a novel grafting monomer, vinyltrimethoxysilane (VTMSi), with various grafting initiators. The effects of these grafting initiators were evaluated. It was possible to successfully copolymerize VTMSi within the silk fiber matrix without disturbing the fine structure of the fiber matrix, which was shown by FTIR analysis and refractive index measurements. The physical properties of VTMSi grafted silk were analyzed and compared to fibers grafted with conventional monomers such as methyl methacrylate, methacrylamide, and 2‐hydroxyethyl methacrylate. No trend in the tensile strength and elongation at break was observed when grafting silk fibers with VTMSi. Crease recovery in the wet state improved significantly, suggesting that this new grafting technique is important for the production of washable silk fabrics. The thermal stability of VTMSi grafted silk fibers was improved as shown by the shift of the endothermic peak for the thermal decomposition toward higher temperatures. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 79: 1764–1770, 2001