涤锦超细纤维毛巾布的功能整理

介绍了涤锦超细纤维毛巾布防紫外线整理、抗菌除臭整理和芳香整理工艺,其主要工艺流程包括碱减量、去油、染色功能整理一浴法、脱水、松式烘干和拉幅定形等。对各功能性整理成品进行的测试表明,其UPF值为50+,对金黄色葡萄球菌的抑菌率为99.9%,留香效果139.68 mg/kg。     

喷气涡流纺涤纶纱工艺研究

研究了喷气涡流纺工艺对涤纶纱成纱性能的影响,改变涤纶纺纱工艺参数进行单因子实验.并通过正交试验得出喷气涡流纺涤纶纱的最佳工艺参数:导纱针到空心管的距离为0.5 mm,喷嘴气压0.6 MPa,纺纱速度为170 m/min.     

DeviceNet总线在织机伺服卷取/送经中的应用

基于DeviceNet总线在织机伺服卷取/送经中进行硬件设计,介绍了伺服卷取/送经驱动器的控制字、状态字、控制数据、状态数据和伺服定位控制功能。控制系统通过DeviceNet总线将命令控制信息、控制数据发送到伺服卷取/送经驱动器,同时通过DeviceNet总线获取伺服卷取/送经驱动器的状态信息、状态数据;最后阐述了伺服卷取/送经的总线通讯、驱动程序设计。实现了伺服卷取/送经的数字化控制,和对纬密的精确调节及对经纱张力的精确控制,自动化程度也得到提高。     

黏弹性分数导数型饱和土中球形空腔的动力响应

基于Biot理论,在频率域内研究了黏弹性分数导数型饱和土中球形空腔的动力响应。利用分数阶导数黏弹性模型描述土骨架的应力–应变本构关系,并采用与土体孔隙率有关的应力系数合理地确定了衬砌和孔隙水分别承担的内水压力值。通过土体和衬砌接触面处的连续性边界条件,得到了内水压力作用下黏弹性分数导数型饱和土体中球形空腔的稳态动力响应。考察了物性参数对响应幅值的影响,研究表明：土体黏性和材料特性以及多孔柔性衬砌和饱和土的相对渗透性,对系统响应有较大的影响。     

主应力轴循环旋转下饱和软黏土的累积变形

交通荷载下地基中土单元的主应力大小和方向将同时发生变化,现有的计算交通荷载引起的路基长期沉降实用模型未能反映交通荷载引起的土体单元主应力轴循环旋转现象。在推导常广义剪应力主应力轴循环旋转方程及验证空心圆柱剪切仪动力加载能力基础上,对上海第④层饱和软黏土进行一系列常广义剪应力主应力轴循环旋转加载试验及非等向固结下循环扭剪试验,分析了主应力轴旋转角、围压及静偏应力对循环塑性累积广义剪应变的影响。 将常广义剪应力主应力轴循环旋转加载试验等效成不同不排水静偏应力和动应力循环旋转加载试验,从而进一步 验证了文献 [12] 所提出的显式模型在模拟主应力循环旋转效应方面的可靠性。     

重力对饱和多孔介质中颗粒输运特性的影响

利用室内土柱试验研究重力对饱和多孔介质中颗粒输运特性的影响,包括渗流方向自上向下和自下向上两种不同的试验系列,每个系列中进行了5种不同渗流速度的试验。研究结果表明,渗流方向自上向下时的流出液中颗粒的浓度峰值要大于自下向上时的浓度峰值,并且前者的浓度峰值出现的也快。同一渗流方向条件下,渗流速度越大,流出液中颗粒的浓度峰值越大。其次,渗流自上向下时,随着渗流速度的增加,弥散度的值随之减小,但在渗流自下向上时,渗流速度的变化对弥散度的影响很小。另外,同一渗流方向中,随渗流速度增大,沉积系数逐渐减小,回收率逐渐增大,并且沉积系数在渗流自下向上时较渗流自上向下时的要大。可见,重力和渗流速度是影响饱和多孔介质中颗粒输运的重要因素,渗流速度越小,重力的作用越明显。     

Print clarity on digitally printed textiles – a quantitative evaluation

Abstract

Print clarity of a digitally printed product has great impact on the final esthetic appearance and performance of the printed products. Print clarity on various textile substrates is considered as image sharpness in this research. The current standard test method is a subjective test where a printed fabric is evaluated visually by one or more human subjects. To advance digital printing of textiles further, it is critical to create a quantitative evaluation method for testing print clarity (sharpness), as has been done with paper. In this paper, a quantitative evaluation of the print clarity (sharpness) of a digitally printed test pattern on textiles was created. Different colors, directions, and fabrics (substrates) were considered in the design of experiment. Eight similar weight and structure woven polyester samples along with a paper substrate were printed with MS JP7 printers using nano-pigments and printed in two directions. The resulting prints were scanned with an EPSON Expression 11000XL Photo Scanner. Several software packages, including Image-Pro and MatLab, were used to process data to analyze and compare image contrast of the test pattern under different conditions. Improved print clarity in digital printing on polyester woven fabric was explored. The newly developed test method is a quantitative test method that makes optimization of the print quality (sharpness) easier and more accurate.     

基于近红外光谱法的棉∕涤混纺织物中棉含量快速检测

 纺织纤维的快速分析对纺织品生产质量监控、贸易和市场监督具有重要现实意义。本文以249个棉涤混纺织物为研究对象,采用偏最小二乘法（partial least squares,简称PLS）建立了棉涤混纺织物中棉含量的近红外定量校正模型,并按样品的含棉量细分为0~30%、30~60%、60~80%和80~100%共4部分,分段建模,分别建立定量模型。为验证模型的实用性,对200个棉涤样品进行了预测,将预测结果进行方差分析,得到该方法与国标方法GB/T 2910.11-2009(等同采用ISO1833-11:2006)的结果不存在显著差异的结论,并据此制定了纺织品原料组分近红外快速检测初筛方法的标准操作规程（standard operation procedure SOP）,经实际应用证明效果显著。     

丙三醇醇解聚酯产物的测试与表征

 本文采用醇解法,研究了废弃聚酯纤维(PET)在丙三醇中的醇解机理,并利用红外光谱(FT-IR)、紫外光谱(UV)、质谱(MS)、高效液相色谱(HPLC)、热重(TGA)五种表征方法对醇解产物进行分析。首先通过红外光谱和紫外光谱初步判定降解产物结构;其次应用质谱分析得到降解产物的分子结构和相对分子质量;再次由高效液相色谱对降解产物进行定量分析,并结合热重分析判断产物纯度,最后应用盐酸-丙酮法测定降解产物的环氧值。综合五种表征,得到了丙三醇醇解PET聚酯的机理,并测定降解产物的环氧值为0.259。     

The evolution of lean beef: identifying lean beef in today's U.S. marketplace

Changes in cattle breeding and management coupled with extensive trimming of visible fat from retail cuts have resulted in the wide-spread availability of lean beef to U.S. consumers. Despite these changes, there is limited awareness regarding the reduced total fat content and the favorable fatty acid profile of beef. Relative to the calories it contributes, the impact of beef on the nutritional quality of the American diet via its contribution of protein and certain key micronutrients is often under appreciated. The following discussion documents the progressive reduction in fat content of U.S. beef during the past 30 years, highlights ongoing efforts to update United States Department of Agriculture nutrient data for beef, and summarizes findings from randomized controlled trials of beef and plasma lipid outcomes. Beef is a popular, nutrient-dense food and the availability of at least 29 lean cuts of beef in the U.S. marketplace can help consumers meet their cardiovascular health goals.