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    • 8. 发明申请
    • METHOD OF MANUFACTURING A COMPOSITE FILTER MEDIA
    • 制造复合过滤介质的方法
    • WO2010014986A2
    • 2010-02-04
    • PCT/US2009/052581
    • 2009-08-03
    • E. I. DU PONT DE NEMOURS AND COMPANYJONES, David, CharlesLIM, Hyun, Sung
    • JONES, David, CharlesLIM, Hyun, Sung
    • B01D39/163D01D5/0069D01D5/0084D04H1/559D04H1/56D04H1/728D04H3/14
    • A method of making a composite filter media includes, in an exemplary embodiment, forming a nonwoven fabric mat that includes a plurality of synthetic fibers by a spunbond process, and calendering the nonwoven fabric mat with embossing calender rolls to form a bond area pattern comprising a plurality of substantially parallel discontinuous lines of bond area to bond the synthetic fibers together to form a nonwoven fabric, the nonwoven fabric having a filtration efficiency of about 35% to less than 50%, measured in accordance with EN 1822 (1998) test procedure. The method also includes applying a nanofiber layer by electro-blown spinning a polymer solution to form a plurality of nanofibers on at least one side of the nonwoven fabric mat to form the composite filter media, the composite filter media having a minimum filtration efficiency of about 70%, measured in accordance with EN 1822 (1998) test procedure.
    • 制造复合过滤介质的方法包括在一个示例性实施方案中,通过纺粘方法形成包括多个合成纤维的非织造织物垫,并用压花辊压辊压制非织造织物垫,以形成包含 多个基本上平行的不连续的粘合区域线,以将合成纤维粘合在一起形成非织造织物,所述非织造织物具有根据EN 1822(1998)测试程序测量的约35%至小于50%的过滤效率。 该方法还包括通过电纺丝聚合物溶液来应用纳米纤维层,以在非织造织物垫的至少一侧上形成多个纳米纤维以形成复合过滤介质,复合过滤介质具有最小的过滤效率约为 70%,按照EN 1822(1998)测试程序测量。