The present invention is mixed fiber non-woven fabric having excellent trapping efficiency on top pressure loss is low, provides a mixed fiber non-woven fabric may be used particularly suitably air filter.
Mixed fiber non-woven fabric of the present invention is a mixed fiber non-woven fabric made of consists of fibers made of a fiber and a polyolefin-based resin component B consisting of at least two kinds of the polyolefin resin component A, first made of the polyolefin resin component A the number average fiber diameter of 1 fiber groups are 0.3~7.0μm, among the fibers comprising the polyolefin resin component Bs, each of said fiber diameter than the number average fiber diameter of the first fiber group are 5 times or more greater, and the second fiber groups, each fiber diameter of the fibers is 15~100μm is, in the cross section of the mixed fiber non-woven fabric while maintaining the form of fibers, 7.0 lines per section length 1mm or it included and, and, the melting point of the polyolefin resin component B 5 to 40 ° C. lower than the polyolefin-based resin component a, the number average fiber diameter of the entire mixed fiber non-woven fabric is 0.3~10μm mixed it is a fiber non-woven fabric.