非织造布纤维取向测定原理与方法综述

对非织造布纤维取向的测定原理和方法作了全面的回顾,对各种非织造布纤维取向的测定原理和方法的优缺点和应用范围进行了比较.指出了采用简便、可行和可靠的间接测量法和在线测量非织造布的纤维取向是今后研究的主要方向.     

激光与均匀大尺度等离子体相互作用中受激拉曼散射不稳定性的研究

研究了波长为810 nm、脉宽为0.81 ps的圆偏振激光脉冲与毫米量级的一维均匀等离子体相互作用中受激拉曼散射不稳定性;利用一维粒子模拟程序分析了激光沿着靶传播过程中在不同位置的受激拉曼散射,以及激光强度和等离子体密度对受激拉曼散射不稳定性的影响;发现激光强度增强和等离子体密度的增加（1/4临界密度内）均能够促进受激拉曼散射的发展.研究结果可为点火试验的设计提供参考.     

准弹性激光散射谱与细胞膜力学特性的关系

推导出红细胞膜的准弹性激光散射功率谱线宽与细胞膜变形能力以及弯曲模量的关系。并在实验上以显微激光散射技术在无扰、原位、实时情况下实施了对单个活态红细胞细胞膜变形能力以及弯曲模量的测量,得出了与理论估计以及其它实验方法一致的结果。证明了显微激光散射技术可作为测定细胞膜力学特性的有力手段。     

粘合剂粒径对非织造布性能的影响

探讨了粘合剂粒径对非织造布力学性能的影响。实验表明,随着粒径变细,非织造布的拉伸强度和弯曲模量呈非线性增加。分析认为由细旦纤维制成的非织造布可具有较高的拉伸强度和较低的抗弯模量,这些概念也适用于热熔纤维粘合和热轧非织造布。     

VAE乳胶复合非织造布/软木纸材料的工艺性能研究

以非织造布、软木纸和醋酸乙烯／乙烯共聚物（VAE）乳胶为原料，采用正交设计方法分析涂胶量、加热温度、加热时间、滚压压力和滚压次数对非织造布／软木纸复合材料剥离强度、弯曲强度和拉伸强度的影响．通过数理统计分析，得出了非织造布／软木纸复合材料的成型最佳工艺．     

SMS非织造布横纵向机械性能的差别分析

通过对比SMS非织造布的横向机械性能和纵向机械性能,并分析SMS非织造布的热压点尺寸及形状等直观表达非织造布热压点分布状态的数据,找出了非织造布横向及纵向机械性能差别与热压点分布的关系,为SMS非织造布机械性能的进一步研究提供了可行的评测手段.     

胶乳粘合非织造布物理-机械性能及其影响因素分析

本文用二次回归旋转设计方法研究了纤维网重、含胶量、针刺密度对胶乳粘合非织造布的主要物理-机械性能的影响:利用导出的回归方程,确定了上述影响因素的控制范围。在这个范围内,可使胶乳粘合非织造布物理-机械性能达到最佳值,实际结果验证了回归方程的可靠性,因而可使最佳因素控制范围应用到实际的非织造生产中。     

非织造布粘合衬性能及产品系列的研讨

本文为适应服装行业对非织造布粘合衬产品提出多品种、系列化的要求,根据服装对粘合衬性能要求,研讨了影响非织造布粘合衬应用性能的几个主要因素.文章应用正交设计就非织造布定量、粘合剂品种两因子对非织造布粘合衬的硬挺度、折皱弹性、拉伸强度、手感作了试验分析.还研讨了浆点涂层的浆点点径规格、热熔胶品种对粘合村剥离强度的影响. 在综合上述试验分析后,以西服为例对非织造布粘合衬产品系列提出了看法.     

阶跃式平面热源法在测量非织造布热物性参数上的应用

针对非织造布的特点,选择了阶跃式平面热源法对非织造布样品进行导热系数和热扩散率的测量.通过对试验结果的检验,证实了非织造布可以用阶跃式平面热源法测量导热系数和热扩散率.此外,针对测量结果的稳定性的分析,说明测量方法的设计对测量精度会有直接影响.     

二苄叉山梨醇对等规聚丙烯的影响(Ⅲ)——应用小角光散射法研究聚丙烯的结构形态

二苄叉山梨醇(DBS)是等规聚丙烯的成核剂。本文应用小角激光散射法研究散射强度与DBS含量的关系,并进行了计算。应用光散射模型理论和统计理论探讨聚丙烯加入DBS后形态结构的变化。     

Relationship between Light Scattering Intensity and Basis Weight of Non-Woven Fabrics

The relationship between light scattering intensity and basis weight of nonwoven fabrics is studied by using the theory of electromagnetic wave propagation and scatter-ing in random media.The theoretical analysis shows that the backscattering intensity of nonwoven fabric is closely related to its basis weight,and 2 series nonwoven samples manufactured by spun-bonded and thermal-bounded processing methods are tested for checking the theoretical expression.The study shows that the scattering intensity increases with increasing basis weight of nonwoven fabrics in exponential equation,and theoretical expression is consistent with the experimental data.     

Measuring Fiber Orientation in Nonwoven Fabrics by Laser Scattering Method PartⅠ Principle and Instrumentation

The scattering performance of a parallel laser beam onthe parallel fiber model and nonwoven fabrics are studiedin detail. A device of computer - program - controlledsystem for measuring laser scattering intensity - angledistribution function of fiber assemblies is set up, and themeasuring condition for distingulslhing the fibers ar-ranged at different directions is carried out. The materi-als of two categories, the models of fiber assembly andnonwoven fabrics made with varied processing methods,are studied. The analysis and experiments show that thefiber orientation distribution functions in the 2 - dimen-sional fiber assemblies can be sensitively determined bylaser scattering method.     

非织造布组分配比微波检测法的研究

本文利用微波检测技术对非织造布的组分配比进行了测试研究。非织造布由不同配比的双组分(ES)纤维和蚕丝下脚料经混和,开松,梳理成网,并加热,熔融粘合而成。测试结果表明:微波谐振腔传感器检测电流示值与非织造布的配比关系曲线呈指数方程形式,指数值与组分配比呈良好的线性相关,同时,检测电流示值与非织造布强力也有一定程度的相关。     

A Study on Modifying the Calculation Model of Valid Opening Size of Heat - bonded Nonwoven Fabrics

It has been found that there are marked errors in the value of valid opening size of heat-bonded nonwoven fabrics between theoretical calculations and engineering measurements. A new modified theoretical model is advanced in this paper. The equivalent diameter of the pore of a fibre web is used to calculate the valid opening size instead of the maximum diameter of inscribed circle used, because the fibres in practical fibre webs are flexible elastomers with definite diameters and the pore of fibre web may produce deformation in screening teat and engineering usage. The results show that the theoretical calculations coincide well with the engineering measurements. This method offers a theoretical basis for computer simulation to the performance of filters of heatbonded nonwoven fabrics.     

Measuring Fiber Orientation in Nonwoven Fabrics by Laser Scattering Method Part Ⅱ: Algorithm and Verification

The algorithm for evaluation of fiber orientation distribution function (ODF) by laser scattering method based on 2 - dimentional model of fiber arrangement and the method of determining diffuse scattering intensity are presented. The fiber ODFs of nonwoven samples measured by the computer-program-controlled laser scattering intensity testing system are compared with that of the data obtained by microprojector method. The results show that the algorithm is feasible for assessing the fiber ODFs of nonwoven fabrics manufactured by different processing methods.     

Measuring Fiber Orientation in Nonwoven Fabrics by Laser Scattering Method Part II: Algorithm and Verification

The algorithm for evaluation of fiber orientation distribution function (ODF) by laser scattering method based on 2 - dimentional model of fiber arrangement and the method of determining diffuse scattering intensity are presented. The fiber ODFs of nonwoven samples measured by the computer- program-centrolled laser scattering intensity testing system are compared with that of the data obtained by microprojector method The results show that the algorithm is feasible for assessig the fiber ODFs of nonwoven fabrics manufactured by different processing methods.     

高膨松性非织造布的加工方法和产品性能的分析比较

本文对三利,不同粘合加固纤维网方法(乳液喷洒法,双组分低熔点纤维和热熔粉末粘合法)所制得的高膨松非织造布的性能进行了测试,并对各生产过程特点和产品性能逆行了比较。在高膨松性非织造布的体积密度范围内,有空气对流传热机理存在。导热系数随体积密度增加而降低,在单位面积重量相同条件下,膨松度高的非织造布。织物表现厚度大,虽然导热系数高,但织物传热量较低,其绝热保暖性好。     

INFLUENCE OF PROCESSING PARAMETERS AND POWDER BINDER CONTENT ON PROPERTIES OF HIGH LOFT NONWOVEN FABRICS

In this paper, the influence of processing parameters and powder binder content was studied and analysed on the properties of high loft nonwoven fabrics mainly using statistical analysis method. The relationship between the bulkiness and the warmth retention property was also tested. The analytical results reveal that the increase of the powder content, heating temperature and pressure will affect the tensile strength of nonwovens. Moreover, there are interactions between these parameters. The compression properties only change a little for a powder binder content of 15％—20％. However, with the increase of the heating temperature and pressure, the bulkiness and compression rate will reduce significantly. For the bulk density of high loft nonwoven fabrics, there exists a heat transter mechanism of air convection, but the higher the bulkiness of nonwovens, the larger the thickness and the better the warmth retention property of nonwoven fabrics.     

Influence of Processing Parameters on Properties of Needle punched Composite Geotextiles

The influence of the processing parameters on the properties of needle-punched composite geotextiles, compounded by polypropylene filament woven-fabrics and nonwoven fabrics is studied by using orthogonal design method. The relationship between tensile strength and peeling strength is discussed. The experimental results are offered as reference.     

Mechanical Design and Research on Process of Air Suction Drawing System of Spunbonded Nonwoven

The design guideline for the air suction drawing system with auxiliary air was analyzed, a spunbonding nonwoven system named PADHL1 - 3200 was designed and polypropylene （PP） spunbonded nonwoven fabrics with excellent properties were achieved after many trial runs. On the other hand, the suction air velocity （VA） was calculated and the influence of VA on the bonding strengh of PP nonwoven fabrics was Studied as well. It was found that VA is 1.5 - 2.5 times of the spinning velocity. With the increase of VA, PP fibers become finer and the bonding strength of PP nonwoven fabrics increases as well.