高性能改性熔喷材料的制备及其过滤性能

Preparation and filtration performance of modified melt blown materials with high performance

系统优化了熔喷材料的成型,引入新型驻极技术,研究纤网结构,聚丙烯改性和驻极技术对熔喷材料过滤性能的影响。结果表明:交叠结构熔喷材料的过滤阻力比堆叠结构低14.5%;聚丙烯改性明显提高了纤维结晶度,使过滤效率提升了10.3%;经水驻极处理的熔喷材料的过滤效率比电晕驻极处理高8.9%。在测试流量85L/min的条件下,交叠结构改性熔喷材料对盐性颗粒物的过滤效率和过滤阻力分别为99.7%和81.0Pa,对油性颗粒物的过滤效率和过滤阻力分别为99.1%和80.9 Pa。

By systematically optimizing the melt blown formation and introduction of electret process, the influence of fiber web structure, polypropylene modification, and electret process on the filtration performance of melt blown materials is investigated. The results indicate that overlapped structure results in 14. 5% decrease of pressure drop compared to stacked structure. In addition, the modification of polypropylene leads to the increase of fiber crystallinity and thus filtration efficiency up to 10. 3%. The hydro charging treatment significantly improves the filtration performance(8. 9%) compared with the conventional corona charging treatment. Under the condition of 85 L/min,the filtration efficiency and pressure drop of melt blown materials with overlapped structure for NaCl particles are 99. 7% and 81. 0 Pa. When paraffin oil particles are used, the filtration efficiency and pressure drop are 99. 1% and 80. 9 Pa, respectively.