非织造材料传输植物营养液性能及其应用

为了研究聚酯纺黏针刺非织造材料和聚酯长丝机织物对植物营养液的传输效果,根据毛细效应原理,利用非织造材料和机织物的芯吸现象,对经不同浓度亲水剂溶液预处理后的聚酯纺黏针刺非织造材料和聚酯长丝机织物的芯吸效果进行研究.试验结果表明:经V(亲水剂)∶V(水)=2∶1 000的亲水剂溶液处理后的聚酯纺黏针刺非织造材料和聚酯长丝机织物的芯吸高度都达到最大,当材料面密度相同时,未轧光聚酯纺黏针刺非织造材料芯吸带液量比聚酯长丝机织物芯吸带液量多15%,而且聚酯纺黏针刺非织造材料对营养液的多次传输效果好.通常植物营养液的pH值为5.5~6.5,试验结果显示纺黏针刺非织造材料在pH值为6的营养液中芯吸高度最大.因此,在pH值为6的营养液中,聚酯纺黏针刺非织造材料作为传输芯材更合适.     

Dependence of Mechanical Performance of Polytetrafluoroethylene Filament on Elongation of Dispersion Particles

The effect of elongation of particles in dispersion powders on mechanical performance of polytetrafluoroethylene(PTFE) flat filament is analyzed. Morphology and elongation of particles in four different PTFE dispersion powders are analyzed. Meanwhile, the correlation between elongation and diameter of dispersion particles is discussed. Strength-elongation curves of PTFE flat filaments made of four different dispersion powders are obtained from measurements of mechanical behaviors. Experimental results show that PTFE flat filament manufactured with dispersion particles having appropriate elongation(0.55-0.60) shows excellent mechanical performance. This work could be regarded as a reference for manufacturing high performance PTFE flat filaments.     

再生聚酯针刺阻燃地毯性能

将回收的聚酯织物造粒增黏改性后,经熔融纺丝制得阻燃聚酯纤维,并将其用于针刺阻燃地毯的生产。对织物再生聚酯颗粒的相对分子质量和熔融流动性能进行测试,对常规涤纶短纤、织物再生聚酯短纤的物理性能、大分子结构、结晶度和取向度进行分析,对织物再生聚酯针刺地毯的耐磨性和阻燃性进行研究。结果表明:织物再生聚酯颗粒的相对分子质量较大且分布较宽,其熔体属于典型的假塑性非牛顿流体;织物再生聚酯短纤的细度、断裂伸长率要高于常规涤纶短纤,但其取向度和断裂强度明显较低;织物再生阻燃聚酯短纤生产的针刺地毯耐磨性良好,阻燃性能优良,满足国标规定的B1(B-S1,t1)级要求。