公开(公告)号：EP3520873A1

公开(公告)日：2019-08-07

申请号：EP17856062.9

申请日：2017-09-25

申请人： Nitto Denko Corporation

发明人： NIKI, Takashi ,  MORI, Masaaki ,  WADA, Shiho ,  DAIMON, Atsushi ,  YANAGI, Toshiki

IPC分类号： B01D39/16 ,  B01D46/52 ,  B01D63/14 ,  B01D71/36 ,  B32B3/28 ,  B32B27/30

摘要： An air filter medium (10) includes a first porous PTFE membrane (1) and a second porous PTFE membrane (2). The air filter medium (10) has a first main surface (11) and a second main surface (12), and the first porous PTFE membrane (1) and the second porous PTFE membrane (12) are arranged so that an air flow moving from the first main surface (11) to the second main surface (12) passes through the first porous PTFE membrane (1) and subsequently through the second porous PTFE membrane (2). A contact angle of the first porous PTFE membrane (1) with water is in the range of 154° to 165°.

公开(公告)号：EP3357564B1

公开(公告)日：2020-03-04

申请号：EP16850686.3

申请日：2016-09-30

申请人： Nitto Denko Corporation

发明人： NIKI, Takashi ,  MORI, Masaaki ,  WADA, Shiho ,  DAIMON, Atsushi

IPC分类号： B01D71/36 ,  B01D39/16 ,  B01D46/52 ,  B01D63/14

公开(公告)号：EP3357564A1

公开(公告)日：2018-08-08

申请号：EP16850686.3

申请日：2016-09-30

申请人： Nitto Denko Corporation

发明人： NIKI, Takashi ,  MORI, Masaaki ,  WADA, Shiho ,  DAIMON, Atsushi

IPC分类号： B01D71/36 ,  B01D39/16 ,  B01D46/52 ,  B01D63/14

CPC分类号： B01D46/543 ,  B01D39/1623 ,  B01D39/1692 ,  B01D46/0005 ,  B01D46/009 ,  B01D46/52 ,  B01D46/521 ,  B01D63/14 ,  B01D71/36 ,  B01D2239/065 ,  B01D2239/1216 ,  B01D2239/1225 ,  B01D2239/1233 ,  B01D2275/10

摘要： An air filter medium (10) includes a first porous PTFE membrane (1) and a second porous PTFE membrane (2). An average fiber diameter of fibers included in the first porous PTFE membrane (1) is 0.24 to 0.45 µm, an average fiber diameter of fibers included in the second porous PTFE membrane (2) is 0.04 to 0.23 µm, the air filter medium (10) has a first main surface (11) and a second main surface (12), and the first porous PTFE membrane (1) and the second porous PTFE membrane (12) are arranged so that an air flow moving from the first main surface (11) to the second main surface (12) passes through the first porous PTFE membrane (1) and subsequently through the second porous PTFE membrane (2).

公开(公告)号：EP3520875A1

公开(公告)日：2019-08-07

申请号：EP17856064.5

申请日：2017-09-25

申请人： Nitto Denko Corporation

发明人： NIKI, Takashi ,  MORI, Masaaki ,  WADA, Shiho ,  DAIMON, Atsushi ,  YANAGI, Toshiki

IPC分类号： B01D39/16 ,  B01D46/52 ,  B01D71/36 ,  C08J9/00

摘要： An air filter medium (10) includes a first porous PTFE membrane (1) and a second porous PTFE membrane (2). The air filter medium (10) has a first main surface (11) and a second main surface (12), and the first porous PTFE membrane (1) and the second porous PTFE membrane (12) are arranged so that an air flow moving from the first main surface (11) to the second main surface (12) passes through the first porous PTFE membrane (1) and subsequently through the second porous PTFE membrane (2). A thickness of the first porous PTFE membrane (1) is in the range of 4 to 40 µm and a specific surface area of the first porous PTFE membrane (1) is 0.5 m 2 /g or less.