| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wet-laid staple fiber nonwoven fabric having a thin thickness and a low permeability that can be manufactured at a low cost and that is suitable for use in a high performance filter or separator by using a main fiber with a flat cross-sectional shape as well as a binder fiber with a flat cross-sectional shape that excels in thermal adhesion. <P>SOLUTION: A web is formed of a main fiber with a flat cross-sectional shape that has an aspect ratio, i.e., a length ratio of the long side to the short side (long side/short side) of 1.5 to 6.0, a fiber length of 2 to 20 mm and a single filament fineness of 0.8 to 4.0 dtex, as well as a binder fiber with a flat cross-sectional shape that excels in thermal adhesion. The web is then subjected to a heat treatment to provide the wet-laid staple fiber nonwoven fabric. <P>COPYRIGHT: (C)2012,JPO&INPIT |
