| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an electret filter medium having a low gas permeation resistance, a high trapping efficiency, a high dust retaining amount, no fuzz, and good adhesion. <P>SOLUTION: The electret filter medium includes at least four layers interlaced with each other and integrated, comprising a net for reinforcing and an electret layer composed of a short fiber of a round section, and both the outer layers comprising a thermal bond nonwoven fabric or a long fiber nonwoven fabric. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
