聚合物梯度结构非织造布的形态结构及其应用

梯度结构非织造布由于其结构特性在气悬体过滤工程中的应用越来越广.用梯度结构非织造布过滤气悬体的过程一般分为润湿、吸附、聚结三个过程.主要讨论非织造布材料增加其气悬体过滤性能的一些新技术及其过滤过程.     

非织造布结构吸声性能研究

研究背后有空气层时非织造布吸声特性.分析非织造布吸声系数与声阻抗率随频率的变化规律,由此得出吸声峰值频率的计算公式.传统窗帘吸声极大值频率的计算公式可以作为本文的一个特例.应用穿孔板共振结构吸声理论得出与实测非织造布结构第一吸声峰值频率相近的频率值.     

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.     

卫生用薄型热轧非织造布的生产技术及其展望

简要介绍了热轧非织造布工艺流程和卫生用热轧非织造布原料的特点与选择 .通过对 3个试验的描述和对试验结果的分析 ,详细地论证了温度、压力和速度对热轧非织造布性能的影响 .根据市场的现状 ,发表了对卫生用薄型非织造布生产技术发展方向的展望     

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.     

木浆纤维水刺复合不同加固结构纤网时的流失现象

木浆纤维经气流成网后,分别与PP/PE(聚丙烯/聚乙烯)纺黏热轧非织造布、PP/PE短纤热轧非织造布、PP/PE短纤热风非织造布和涤纶水刺非织造布纤网叠合形成试样,通过水刺复合,观察水针冲击过程中不同加固纤网结构条件下木浆纤维的流失现象,研究木浆纤维的流失过程和机理,并分析非织造布纤网结构对木浆纤维流失的影响.试验表明:木浆纤维与非织造布纤网中的纤维缠结以摩擦作用为主,当水针冲击力大于纤维之间的摩擦力,纤维互相分离,木浆纤维易脱离纤网而流失;在相同压力的水针冲击条件下,木浆纤维与PP/PE纺黏热轧非织造布、PP/PE短纤热轧非织造布及PP/PE短纤热风非织造布纤网复合时其流失严重,流失率均高于8%,而涤纶水刺非织造布纤网适于与木浆纤维的缠结,木浆纤维的流失率低,仅为2.95%.     

薄型粘合法非织造布的结构与性能

本文应用扫描电镜实验手段,结合气流成网机理,通过粘合剂对纤维的润湿效果,纤维网中纤维杂乱分布程度,以及非织造布断裂强度的分析,对 SW-63型气流成网机和 K 12气流成网机两种成网形式形成的纤维网,经粘合剂加固制成的非织造布结构与性能进行了研讨,得到的结论是:K12气流成网机中的纤维在网中的杂乱程度,比 SW-63型气流成网机好.纤维在网中的相对位置分布影响粘合剂对它的润湿,即粘附。粘合剂种类和纤维强力对非织造布的断裂强度有较大的影响.     

基于二维Gabor滤波器的非织造布疵点检测

针对非织造布疵点自动检测问题,提出一种基于二维Gabor滤波器的非织造布疵点检测方法.该方法采用3个尺度和4个方向的滤波器分别对经过Gamma矫正以及同态滤波处理的正常图像和疵点图像进行滤波,进而得到偏差图像,并做融合处理,经二值化后将疵点从织物背景中提取出来,从而实现非织造布的自动检测.试验结果表明,该方法对非织造布各类疵点的检测,尤其是对隐性疵点是非常有效的.     

非织造布力学各向异性与顶破强力的模拟计算

本文研讨非织造布力学性质估算方法。取对称于两垂直轴的各向异性平面体,各方向的应力与应变保持线性,应用平面体任意方向的拉伸模量与主模量间的关系式,推导得出上述平面体的顶破强力计算公式。顶破强力计算式中包括舍弹性常数(材料拉伸应力方向与主模量方向间夹角的函数)、材料最小断裂伸长率和试样尺寸等参数。设令非织造布符合上述平面体模型,采用非织造布力学性质实测资料验证其适应程度。文中给出两种涤纶热轧非织造布的试验结果与理论计算值随参数值变化的规律基本一致,丙纶溶喷非织造布的顶裂强力实测值与理论计算值的差异随参数值不同而变化。     

非织造布在新型剪纸中的应用研究

通过对棉型水刺非织造布和SHS非织造布的拉伸断裂性能、撕破强力、吸水性能以及外观形态保持等各方面性能进行表征和分析,将其与传统彩纸的结构和各项性能进行对比,发现其无论是在力学性能还是在外观性能上均比普通彩纸优越,因此得出利用非织造布代替传统彩纸是可行的结论.     

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。     

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.     

糙面土工膜与无纺土工织物界面剪切强度及表面粗糙度变化规律

为了量化糙面土工膜表面粗糙度变化规律,研制了表面粗糙度测量仪,并进行了不同法向应力下糙面土工膜和无纺土工织物界面剪切和对应的糙面土工膜表面粗糙度试验。研究表明,糙面土工膜和无纺土工织物界面剪切强度是由糙面土工膜粗糙凸起和无纺土工织物纤维相互嵌入和拉拽作用产生的,界面的剪切峰值摩擦系数主要受到法向应力的影响,界面强度发展到残余强度,糙面土工膜粗糙凸起磨损趋于稳定,无纺土工织物纤维定向排列完成。     

丙纶非织造布基质人工草坪的开发研究

对非织布基质草坪化的可行性进行技术分析，首次提出丙纶非织造布基质草坪化的整套制造方案并进行一系列的实验，数据显示，非织造布的强力可完全胜任草坪基质的需要，在外加保水剂的情况下，非织造布成功模拟了土壤环境，草坪能顺利移植。对非织造布草坪基质进行的经济成本分析可知此产品在市场推广中具有可行性。     

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.     

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．     

Application of Spacer Fabric for Protecting Cushion

Spacer fabric is a typical three-dimensional fabric, including upper layer, lower layer, and spacer layer. It is widely applied in protecting cushion products for unique space structure, which attributes good comfortability to infants and the disabled elderly in reducing diseases resulting from hot and humidity under long-time sitting and lying period. It necessitates studying the microenvironment change between body and clothes and corresponding performance. Compressibility. air permeability, heat and moisture permeability, and bending and humiture in microenvlronment of spacer fabric are analyzed and compared with foam cushion and nonwoven cushion. Experimental results show that corresponding performance of spacer fabric is better in protecting cushion than those of foam and nonwoven. Compared with traditional foam cushion and non-woven cushion, spacer fabric is more suitable for protecting cushion, and provides an alternative and optimal cushion material in medical products to protect infants and the disabled elderly from bedsores resulted from long-time sitting and lying.     

Theoretical Calculation Model of Single Rip Tearing Strength for the Nonwoven Composites

The nonwoven composites have sandwich structure, with the first and third layers being nonwovens and the middle layer of woven fabric. On the basis of tests of the single rip tearing strength and drawing out resistances of both the nonwoven composites and the woven fabric, the single rip tearing failure mechanism of the composites were analyzed. Then theoretical calculation model for the single rip tearing strength was established, which indicates that the breaking strength of warp and weft yams in the nonwoven composites, the density of warp and weft yarns and drawing out resistances are the main influencing factors. In the end, experimental verification was made, which shows that theoretical values conform to the measured values well.