公开(公告)号：US20180193787A1

公开(公告)日：2018-07-12

申请号：US15743815

申请日：2016-07-25

Applicant: NITTO DENKO CORPORATION

Inventor： Keiko FUJIWARA ,  Yuta KUROKI ,  Hajime YAMAMOTO ,  Asuka ONOHARA

IPC: B01D46/00 ,  B01D67/00 ,  B01D39/16 ,  B01D69/02 ,  B01D71/36

CPC classification number: B01D46/0027 ,  B01D39/1661 ,  B01D39/1692 ,  B01D67/0088 ,  B01D69/02 ,  B01D69/12 ,  B01D71/36 ,  B01D2239/0421

Abstract: The present invention provides an air-permeable filter capable of maintaining excellent air permeation performance without being clogged even in an environment involving exposure to an oil, oil mist, or ink. The present invention relates to an air-permeable filter including a porous membrane having a surface coated with an oil-repellent agent, the filter being characterized in that a sliding angle of 20 μl of hexadecane or pentadecane on the surface of the filter is 60° or less.

公开(公告)号：US20180020284A1

公开(公告)日：2018-01-18

申请号：US15552947

申请日：2016-02-22

Applicant: NITTO DENKO CORPORATION

Inventor： Bunta HIRAI ,  Satoru FURUYAMA ,  Masaaki MORI ,  Hajime YAMAMOTO

IPC: H04R1/28 ,  H04R1/10

CPC classification number: H04R1/2811 ,  H04R1/10 ,  H04R1/28 ,  H04R1/2823 ,  H04R1/2869

Abstract: An acoustic resistor for use in an audio device includes a resin film having air permeability in a thickness direction of the resin film, and the resin film is a non-porous film having through holes formed to extend straight through the resin film in the thickness direction. This acoustic resistor is used in an audio device including: a transducing part that performs conversion between sound and an electrical signal and that includes an acoustic element; a housing enclosing the transducing part and having at least one opening; and a passage for gas that is present inside the housing and communicates with the opening and in which the acoustic element is placed. The acoustic resistor is placed between the opening and the acoustic element in the passage. The variation in properties of the acoustic resistor of the present disclosure can be made smaller than that of conventional acoustic resistors.

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：US20220056310A1

公开(公告)日：2022-02-24

申请号：US17417232

申请日：2019-12-23

Applicant: NITTO DENKO CORPORATION

Inventor： Hajime YAMAMOTO ,  Hiroki KIGAMI ,  Marie AIZUKA

IPC: C09J7/10 ,  C09J7/25 ,  C09J7/24

Abstract: An air-permeable adhesive sheet has air permeability in a thickness direction thereof and including an adhesive agent layer having first through holes extending in the thickness direction, wherein at least one surface of the adhesive agent layer forms an adhesive surface, the through holes have an average opening diameter of 1.0 to 50 μm and an average interval of 5 to 400 μm, and a variation in air permeability in the thickness direction is 22% or less as represented by a coefficient of variation of an air permeability measured according to Method B for air permeability measurement (Gurley method) specified in JIS L 1096: 2010, with an effective measurement area as a predetermined value selected from 0.5 to 2.0 mm2. The air-permeable adhesive sheet is a sheet capable of obtaining good characteristics such as air permeability even when being made into a sheet having a small area.

公开(公告)号：US20180193804A1

公开(公告)日：2018-07-12

申请号：US15741612

申请日：2016-06-01

Applicant: NITTO DENKO CORPORATION

Inventor： Hajime YAMAMOTO ,  Tsukasa MIYAZAKI ,  Yuuki TAKEDA ,  Satoru FURUYAMA

IPC: B01D69/06 ,  B01D71/48 ,  B01D71/64 ,  B23K15/08 ,  B29C67/20 ,  C08J9/00

CPC classification number: B01D69/06 ,  B01D69/00 ,  B01D71/48 ,  B01D71/64 ,  B23K15/00 ,  B23K15/08 ,  B29C67/20 ,  C08J9/00

Abstract: A resin film has through holes formed to extend through the thickness of the resin film. The through holes are pillar-shaped. An average density of the through holes is 1×106 to 1×1012 holes/cm2. An average diameter of the through holes is 1 to 310 nm. A degree of variability of the diameter of the through holes is 30% or less, the degree of variability of the diameter of the through holes obtained by dividing a standard deviation of the diameter of the through holes by the average diameter of the through holes and multiplying the resulting value by 100.

公开(公告)号：US20180035203A1

公开(公告)日：2018-02-01

申请号：US15552901

申请日：2016-02-22

Applicant: NITTO DENKO CORPORATION

Inventor： Bunta HIRAI ,  Satoru FURUYAMA ,  Masaaki MORI ,  Hajime YAMAMOTO

IPC: H04R1/44 ,  H05K5/02 ,  H04R1/02

Abstract: A waterproof sound transmission structure of the present disclosure includes: a wall separating a first space from a second space where water can be present, the wall being provided with a sound transmission port for transmission of sound between the first and second spaces; and a waterproof sound-permeable membrane placed to cover the sound transmission port, the waterproof sound-permeable membrane being adapted to permit transmission of sound between the first and second spaces and being further adapted to prevent ingress of water from the second space into the first space through the sound transmission port. The first space is sealed when the second space is filled with water, the sealed first space having a volume of 300 mm3 or less. The waterproof sound transmission structure of the present disclosure has higher levels of both waterproofness and sound permeability than conventional waterproof sound transmission structures.