公开(公告)号：US20190232211A1

公开(公告)日：2019-08-01

申请号：US16338252

申请日：2017-09-25

Applicant: NITTO DENKO CORPORATION

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

IPC: B01D46/54 ,  B01D46/52 ,  B01D39/16 ,  B32B3/28 ,  B32B5/02 ,  B32B27/32 ,  B32B27/12 ,  B32B27/08

CPC classification number: B01D46/543 ,  B01D39/16 ,  B01D39/1692 ,  B01D46/52 ,  B01D46/521 ,  B01D63/14 ,  B01D71/36 ,  B01D2239/0618 ,  B01D2239/065 ,  B01D2275/10 ,  B32B3/28 ,  B32B5/022 ,  B32B5/28 ,  B32B27/08 ,  B32B27/12 ,  B32B27/30 ,  B32B27/322 ,  B32B2307/724

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

公开(公告)号：US20170292000A1

公开(公告)日：2017-10-12

申请号：US15513736

申请日：2015-09-24

Applicant: NITTO DENKO CORPORATION

Inventor： Satoru FURUYAMA ,  Masaaki MORI ,  Yozo NAGAI ,  Yuuzou MURAKI ,  Toshimitsu TACHIBANA ,  Hajime YAMAMOTO

IPC: C08J5/18 ,  C08J7/12 ,  C08J7/04 ,  B25J15/06 ,  H01G4/12 ,  H05K5/02 ,  G10K13/00 ,  B01D71/48 ,  C04B33/32

CPC classification number: C08J5/18 ,  B01D71/48 ,  B01D2325/022 ,  B01D2325/38 ,  B25J15/0691 ,  C04B33/32 ,  C04B2235/66 ,  C08J7/04 ,  C08J7/12 ,  C08J7/123 ,  C08J9/00 ,  C08J2367/02 ,  G10K13/00 ,  H01G4/12 ,  H05K5/0217 ,  H05K5/06

Abstract: The polymer film of the present invention has through holes extending from one principal surface of the polymer film to the other principal surface of the polymer film. The through holes are straight holes having a central axis extending straight, and have a shape in which the area of a cross-section perpendicular to the direction of the central axis increases from the one principal surface of the polymer film toward the other principal surface. This polymer film has passages in its thickness direction, has an unconventional structure, and can be used in various applications, such as in a waterproof sound-permeable membrane, in a waterproof gas-permeable membrane, and in a suction sheet. The ratio a/b of the opening diameter a of the through holes at the one principal surface to the opening diameter b of the through holes at the other principal surface is 80% or is less than 80%.

公开(公告)号：US20160249119A1

公开(公告)日：2016-08-25

申请号：US15027965

申请日：2014-10-28

Applicant: NITTO DENKO CORPORATION

Inventor： Masaaki MORI ,  Toshimitsu TACHIBANA

IPC: H04R1/02 ,  B29C41/14 ,  B29D99/00 ,  B29C55/00 ,  B29C41/46 ,  B29C41/00 ,  B29C55/06

CPC classification number: H04R1/023 ,  B29C41/003 ,  B29C41/14 ,  B29C41/46 ,  B29C55/005 ,  B29C55/06 ,  B29D99/005 ,  B29K2027/18 ,  B29K2105/0064 ,  B29K2105/04 ,  B29K2105/251 ,  B29K2105/256 ,  B29K2995/0001 ,  B29K2995/0063 ,  B29K2995/0065 ,  B29K2995/0069 ,  H04R1/086 ,  H04R2499/11

Abstract: Provides is a waterproof sound-permeable membrane (10) adapted to permit passage of sound and prevent entry of water. The waterproof sound-permeable membrane (10) includes a sound-permeation region (11) having a polytetrafluoroethylene (PTFE) membrane (20). The polytetrafluoroethylene membrane (20) has an average pore diameter of 0.02 μm or more and 0.1 μm or less as measured according to ASTM F316-86 and has a porosity of 5% or more and 25% or less. The waterproof sound-permeable membrane (10) is suitable for application to an electronic device containing an acoustic device.

Abstract translation: 提供一种适于允许声音通过并防止水进入的防水透声膜（10）。 防水透声膜（10）包括具有聚四氟乙烯（PTFE）膜（20）的声音渗透区域（11）。 聚四氟乙烯膜（20）的平均孔径根据ASTM F316-86测定为0.02μm以上且0.1μm以下，孔隙率为5％以上且25％以下。 防水透声膜（10）适用于包含声学装置的电子设备。