公开(公告)号：EP2792777A4

公开(公告)日：2015-09-02

申请号：EP12857461

申请日：2012-12-14

申请人： TORAY INDUSTRIES

发明人： KURODA AKITO ,  IYAMA YUJI ,  YAKAKE YOSHIKAZU

IPC分类号： D04H3/153 ,  B01D39/16 ,  B03C3/28 ,  D04H1/4382 ,  D04H1/56 ,  D04H3/016 ,  D04H3/16

CPC分类号： B01D39/163 ,  B01D39/16 ,  B01D2239/064 ,  B01D2239/1233 ,  B03C3/28 ,  D04H1/4382 ,  D04H1/56 ,  D04H3/016 ,  D04H3/153 ,  D04H3/16 ,  D04H13/001 ,  Y10T442/625 ,  Y10T442/626

公开(公告)号：EP2787108A4

公开(公告)日：2015-07-29

申请号：EP12853901

申请日：2012-11-27

申请人： TORAY INDUSTRIES

发明人： IYAMA YUJI ,  KURODA AKITO ,  YAKAKE YOSHIKAZU

IPC分类号： D04H3/153 ,  B01D39/14 ,  B01D39/16 ,  D04H1/4382 ,  D04H1/56 ,  D04H3/016 ,  D04H3/16

CPC分类号： B01D39/14 ,  B01D39/16 ,  B01D2239/0435 ,  B01D2239/0622 ,  B01D2239/064 ,  B01D2239/1233 ,  B03C3/28 ,  B03C3/66 ,  D04H1/4382 ,  D04H1/56 ,  D04H3/016 ,  D04H3/153 ,  D04H3/16

摘要： Provided are a mixed-fiber nonwoven fabric exhibiting a low pressure drop and an excellent collection efficiency and being especially suitable for air filters, and a filter medium using the mixed-fiber nonwoven fabric. The nonwoven fabric comprises mixed fibers having different fiber diameters. A group of fibers having a fiber diameter of 5.0 µm or less (fiber group A) is present at a volume fraction of 20 to 80 vol%, a group of fibers having a fiber diameter of 50.0 µm or more (fiber group B) is present at a volume fraction of 1 to 40 vol%, and a group of fibers having a fiber diameter of more than 5.0 µm and less than 50.0 µm (fiber group C) is present at a volume fraction of 0 to 79 vol%. The ratio of the median fiber diameter (B') of fiber group B to the median fiber diameter (A') of fiber group A (B'/A') is 35 or more.

公开(公告)号：EP2985377A4

公开(公告)日：2016-12-21

申请号：EP14783202

申请日：2014-04-03

申请人： TORAY INDUSTRIES

发明人： KURODA AKITO ,  IYAMA YUJI ,  YAKAKE YOSHIKAZU

IPC分类号： D04H3/007 ,  B01D39/16 ,  D04H3/153 ,  D04H3/16

CPC分类号： B01D39/163 ,  B01D39/1623 ,  B01D2239/0435 ,  B01D2239/0622 ,  B01D2239/064 ,  B01D2239/065 ,  B01D2239/1233 ,  B29C47/0004 ,  B29C47/0047 ,  B29C47/06 ,  B29K2023/06 ,  B29K2023/12 ,  D04H1/4291 ,  D04H1/54 ,  D04H3/153 ,  D10B2321/021 ,  D10B2321/022 ,  D10B2505/04

摘要： The present invention provides a mixed fiber nonwoven fabric with both a small pressure loss and a high dust collection efficiency, particularly a mixed fiber nonwoven fabric that works effectively in air filters, and also provides a filter medium formed thereof. The mixed fiber nonwoven fabric according to the invention is a mixed fiber nonwoven fabric comprising at least two types of fibers, namely, fibers of polyolefin based resin component A and fibers of polyolefin based resin component B, a fiber group containing fibers of polyolefin based resin component A being referred to as first fiber group, the first fiber group having a number average fiber diameter of 0.3µm to 7.0 µm, part of the fibers of polyolefin based resin component B that have a fiber diameter in the range of 15µm to 100 µm and not less than 5 times the number average fiber diameter of the first fiber group being referred to as second fiber group, the fibers of the second fiber group maintaining a form of fibers and existing in the cross section of the mixed fiber nonwoven fabric at a rate of 7.0 fibers or more per millimeter of the cross-sectional length, the melting point of polyolefin based resin component B being lower by 5°C to 40°C than that of polyolefin based resin component A, and the number average fiber diameter of the mixed fiber nonwoven fabric as a whole being 0.3µm to 10 µm.