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.     

粉末型非织造布用粘合剂的开发及其性能

本文为开发非织造布用粉末型粘合剂对热塑性聚烯烃进行了接枝改性的分子设计和试验研究,试验结果表明:在一定量的接枝助剂和引发剂条件下,可用马来酸酐对聚烯烃高聚物进行共聚接枝,制得的粉末状改性聚烯烃聚合物具有熔点低,粘合力强的优点,可以作为粉末型非织造布的粘合剂。     

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。     

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。     

丙纶表面氧化改性的研究

对丙纶经浓硫酸和重铬酸钾溶液氧化处理后的表面性能,如比表面、回潮率、比重、强度损失和粘合性等进行初步研究。通过实验表明,浓硫酸和重铬酸钾溶液有刻蚀扩孔的作用,并能引进如羧基和羟基等亲水性基团。适当地控制氧化时间及氧化剂的腐蚀能力,有可能在丙纶强度损失较小的情况下,使其具有一定的表面活性,其界面粘合效果也能提高,有利于制造丙纶复合材料。