CAJ | 학술논문

通过对涤纶非织造布在不同温度下进行的等温结晶DSC分析，确定了热处理温度为210℃，热处理时间分别为1、2、3和4 min。对热处理前后的涤纶针刺非织造布进行力学性能、孔径及过滤效率测试，对比分析结果表明，热处理对涤纶针刺非织造布的结构与性能的改善有重要影响。经过热处理的非织造布的断裂伸长率比未经处理的非织造布低。随着热处理时间的增加，非织造布的断裂强力增大，非织造布平均孔径逐渐减小，对小粒径颗粒的过滤效率提高。对粒径≥2．0μm的颗粒的过滤效率，未经处理的非织造布为46％，处理后的非织造布提升至70％，综合过滤效率得到改善。
통과대조륜비직조포재불동온도하진행적등온결정DSC분석，학정료열처리온도위210℃，열처리시간분별위1、2、3화4 min。대열처리전후적조륜침자비직조포진행역학성능、공경급과려효솔측시，대비분석결과표명，열처리대조륜침자비직조포적결구여성능적개선유중요영향。경과열처리적비직조포적단렬신장솔비미경처리적비직조포저。수착열처리시간적증가，비직조포적단렬강력증대，비직조포평균공경축점감소，대소립경과립적과려효솔제고。대립경≥2．0μm적과립적과려효솔，미경처리적비직조포위46％，처리후적비직조포제승지70％，종합과려효솔득도개선。
Isothermal crystallization behavior of PET at different temperatures was investigated by differential scanning calorimeter (DSC).Based on the analysis, heat treatment temperature was set at 210℃, and the time was set at 1, 2, 3 and 4 min.Then the mechanical properties , aperture and filtration efficiency of original sample and heat-treated samples were tested and compared .The results showed that heat treatment had a major impact on improving the structure and performance of the needle-punched nonwovens; when the time of treatment prolonged , the breaking strength of the material increased gradually;the elonga-tion at break declined comparing with the original sample;the average pore size decreased and the pore size distribution became to be narrower with the increasing time of treatment;furthermore , the filtration efficiency for small aperture was improved , especially for the particles whose size is bigger than 2μm, and the filter efficiency increased from 46% to 70%; to sum up the comprehensive efficiency of filtering was improved .