公开(公告)号：US20170245036A1

公开(公告)日：2017-08-24

申请号：US15519302

申请日：2015-10-15

Applicant: NITTO DENKO CORPORATION

Inventor： Nobuharu KUKI ,  Masaaki MORI

IPC: H04R1/08 ,  C08J7/12

Abstract: The sound-permeable membrane of the present invention is adapted, when placed over an opening for directing sound to or from a sound transducer, to prevent entry of foreign matters into the sound transducer through the opening while permitting passage of sound, the sound-permeable membrane including a non-porous film or a multilayer membrane including the non-porous film. The non-porous film is formed of oriented polytetrafluoroethylene. This sound-permeable membrane has an unconventional configuration and exhibits various excellent properties. At least one principal surface of the non-porous film may have a region subjected to a surface modification treatment.

公开(公告)号：US20150304750A1

公开(公告)日：2015-10-22

申请号：US14646328

申请日：2013-10-28

Applicant: NITTO DENKO CORPORATION

Inventor： Masaaki MORI

IPC: H04R1/02 ,  B32B27/12 ,  B32B27/32 ,  B32B5/02

CPC classification number: H04R1/023 ,  B32B5/022 ,  B32B27/12 ,  B32B27/322 ,  B32B2305/026 ,  B32B2307/10 ,  B32B2307/4026 ,  B32B2307/412 ,  B32B2307/51 ,  B32B2307/724 ,  B32B2457/00 ,  H04R1/086 ,  H04R2499/11

Abstract: The sound-transmitting structure (100) of the present invention includes a sound-transmitting membrane (1) that allows passage of sounds and prevents passage of foreign matters and a case (120) having a sound-transmitting opening (122). This sound-transmitting membrane (1) includes a supporting member (12) that is a nonwoven fabric containing an elastomer and a porous resin membrane (11) disposed on the supporting member (12) and containing polytetrafluoroethylene as a main component. The sound-transmitting membrane (1) covers the sound-transmitting opening (122) with the supporting member (12) welded to the case (120).

Abstract translation: 本发明的声音传送结构（100）包括允许声音通过并防止异物通过的传声膜（1）和具有传声开口（122）的壳体（120）。 这种透声膜（1）包括作为包含弹性体的无纺布的支撑构件（12）和设置在支撑构件（12）上并且以聚四氟乙烯为主要成分的多孔树脂膜（11）。 透声膜（1）用支撑构件（12）覆盖声传送开口（122），焊接到壳体（120）。

公开(公告)号：US20230372858A1

公开(公告)日：2023-11-23

申请号：US18027699

申请日：2021-09-28

Applicant: NITTO DENKO CORPORATION

Inventor： Yusuke IKEMURA ,  Masaaki MORI ,  Shunsuke MASAKI ,  Go SATO

IPC: B01D46/62 ,  B01D71/36 ,  B01D39/16 ,  B01D46/10 ,  B01D46/52 ,  B01D39/20 ,  B01D46/54

CPC classification number: B01D46/62 ,  B01D71/36 ,  B01D39/1623 ,  B01D46/10 ,  B01D46/521 ,  B01D39/2017 ,  B01D46/543 ,  B01D2275/10 ,  B01D2275/305 ,  B01D2275/205 ,  B01D2279/40 ,  B01D2239/0654 ,  B01D2239/1208 ,  B01D2239/1258 ,  B01D2239/1291

Abstract: An air filter medium includes a collection layer, an air-permeable adhesive layer, and a porous fluorine resin membrane in this order from upstream to downstream of the filter medium. An initial pressure drop of the filter medium at a permeate flow rate of 5.3 cm/sec is 250 Pa or less. When a test is performed in which polydisperse polyalphaolefin particles having a peak in number in a particle size range of 0.1 to 0.2 μm are allowed to pass through the filter medium at a concentration of 0.2 to 0.5 g/m3 and a linear velocity of 5.3 cm/sec, the holding amount is 43.0 g/m2 or more from a moment when the holding amount reaches 20 g/m2 to when a moment the pressure drop reaches PD1+120 Pa, where PD1 is the pressure drop of the filter medium at the moment when the holding amount reaches 20 g/m2.

公开(公告)号：US20190224609A1

公开(公告)日：2019-07-25

申请号：US16337806

申请日：2017-09-25

Applicant: NITTO DENKO CORPORATION

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

IPC: B01D46/54 ,  B01D71/36 ,  B01D46/52 ,  B01D46/00 ,  B01D39/16 ,  C08J9/24 ,  B29D99/00

Abstract: An air filter medium includes a first porous PTFE membrane and a second porous PTFE membrane. The air filter medium (10) 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 thickness of the first porous PTFE membrane is in the range of 4 to 40 μm and a specific surface area of the first porous PTFE membrane is 0.5 m2/g or less.

公开(公告)号：US20160207006A1

公开(公告)日：2016-07-21

申请号：US14914978

申请日：2014-08-29

Applicant: NITTO DENKO CORPORATION

Inventor： Satoru FURUYAMA ,  Masaaki MORI ,  Yuichi ABE ,  Keiko FUJIWARA

IPC: B01D69/12 ,  B32B3/26 ,  B32B27/06 ,  B01D69/10

CPC classification number: B01D69/12 ,  B01D67/0032 ,  B01D67/0088 ,  B01D69/10 ,  B01D71/48 ,  B01D2325/38 ,  B32B3/04 ,  B32B3/266 ,  B32B27/06 ,  B32B2307/10 ,  B32B2307/724 ,  B32B2307/7265 ,  B32B2307/73 ,  B32B2457/00 ,  H04R1/023 ,  H04R1/086 ,  H04R2499/11 ,  H05K5/0213

Abstract: Provided is a waterproof gas-permeable membrane (1) having higher levels of both gas permeability and waterproofness than conventional ones. The waterproof gas-permeable membrane (1) includes: a non-porous resin film (2) having through holes (21a to 21g) formed to extend through the thickness of the resin film (2); and a liquid-repellent layer (3) formed on a principal surface of the resin film (2) and having openings (31) positioned in register with the through holes (21a to 21g). The through holes (21a to 21g) extend straight and have a diameter of 15 μm or less. The through holes (21a to 21g) are distributed at a hole density of 1×103 holes/cm2 or more and 1×109 holes/cm2 or less in the resin film (2). The through holes (21a to 21g) extend in oblique directions with respect to a direction perpendicular to the principal surface of the resin film (2). The through holes (21a to 21g) that extend in different oblique directions are present together.

Abstract translation: 本发明提供一种防水透气膜（1），其比透气性和防水性都高。 防水透气膜（1）包括：具有形成为延伸穿过树脂膜（2）的厚度的通孔（21a至21g）的无孔树脂膜（2）; 以及形成在所述树脂膜（2）的主表面上并且具有与所述通孔（21a〜21g）对准的开口（31）的防液层（3）。 通孔（21a〜21g）直线延伸，直径为15μm以下。 通孔（21a〜21g）在树脂膜（2）中以1×10 3孔/ cm 2以上1×10 9孔/ cm 2以下的孔密度分布。 通孔（21a〜21g）相对于与树脂膜（2）的主面垂直的方向在倾斜方向延伸。 以不同的倾斜方向延伸的通孔（21a〜21g）一起存在。

公开(公告)号：US20140138181A1

公开(公告)日：2014-05-22

申请号：US13868607

申请日：2013-04-23

Applicant: NITTO DENKO CORPORATION

Inventor： Masaaki MORI

IPC: G10K11/00

CPC classification number: G10K11/002 ,  G10K11/18

Abstract: A sound-transmitting membrane (1) is provided that allows passage of sounds and prevents passage of foreign matters, the sound-transmitting membrane (1) including a supporting member (12) and a resin porous membrane (11) layered on the supporting member (12) and containing polytetrafluoroethylene as a main component. The supporting member (12) is a nonwoven fabric containing an elastomer. Since the supporting member (12) is a nonwoven fabric containing an elastomer, the insertion loss of the sound-transmitting membrane can be reduced for sounds of 3000 Hz.

Abstract translation: 提供了能够使声音通过并防止异物通过的透声膜（1），包括支撑部件（12）的透声膜（1）和层叠在支撑部件上的树脂多孔膜（11） （12），以聚四氟乙烯为主要成分。 支撑构件（12）是含有弹性体的无纺布。 由于支撑构件（12）是含有弹性体的无纺织物，因此可以减少声音为3000Hz的声音传播膜的插入损耗。

公开(公告)号：US20230390686A1

公开(公告)日：2023-12-07

申请号：US18033113

申请日：2021-10-27

Applicant: NITTO DENKO CORPORATION

Inventor： Shunsuke MASAKI ,  Yusuke IKEMURA ,  Masaaki MORI

IPC: B01D46/52 ,  B01D46/54 ,  B01D39/16 ,  B01D46/00 ,  B01D71/36

CPC classification number: B01D46/521 ,  B01D46/543 ,  B01D39/16 ,  B01D46/0002 ,  B01D71/36 ,  B01D2239/0654

Abstract: A filter pleat pack includes an air filter medium including: a first porous fluorine resin membrane; and a first air-permeable supporting layer. The first air-permeable supporting layer is placed on a downstream side in a direction of an air flow that passes through the filter medium with respect to the first porous fluorine resin membrane, and includes a ventilation inhibiting portion in at least one end portion in a width direction, the ventilation inhibiting portion extending along the at least one end portion, the ventilation inhibiting portion inhibiting ventilation in the width direction through the first air-permeable supporting layer. The ventilation inhibiting portion is in contact with the first porous fluorine resin membrane. This filter pleat pack is suitable for reducing a decrease in the collection efficiency of an air filter unit even when a gap between a lateral surface of the pleat pack and a frame is sealed.

公开(公告)号：US20220193618A1

公开(公告)日：2022-06-23

申请号：US17600439

申请日：2020-04-03

Applicant: NITTO DENKO CORPORATION

Inventor： Shunsuke MASAKI ,  Masaaki MORI

IPC: B01D69/02 ,  B01D71/36 ,  B01D69/12 ,  B01D69/10

Abstract: A filter medium of the present disclosure has a laminate structure composed of a first polytetrafluoroethylene (PTFE) porous membrane, a first air-permeable supporting member, a second PTFE porous membrane, and a second air-permeable supporting member laminated in this order. The first PTFE porous membrane constitutes an exposed surface of the filter medium. A ratio of a transmittance of the first PTFE porous membrane to a transmittance of the second PTFE porous membrane is 100 or more. The filter medium of the present disclosure is a filter medium which includes the PTFE porous membranes, from which dust deposited on a surface over a period of use can be easily removed, and which has excellent reusability demonstrated by reduction of a filtration performance decrease caused by removal of dust.

公开(公告)号：US20210252445A1

公开(公告)日：2021-08-19

申请号：US16973195

申请日：2019-06-26

Applicant: NITTO DENKO CORPORATION

Inventor： Masaaki MORI ,  Yuri HORIE ,  Yukio ARIMITSU

IPC: B01D46/52 ,  B01D46/54 ,  B01D46/16 ,  B01D39/16 ,  B01D46/00 ,  F24F8/10

Abstract: An air conditioner of the present disclosure includes a fan filter unit whose power consumption efficiency determined by the following equation is 600 kWh/(m2·yr) or less when the fan filter unit is operated in such a manner that blowing efficiency η of a fan is 0.75. In the following equation, Q represents a nominal flow rate (m3/sec) of an air filter unit, ΔP represents a pressure loss (Pa) of the air filter unit measured when air passes through the air filter unit at the nominal flow rate of the unit, and S represents an opening area (m2) of the air filter unit. Equation: power consumption efficiency kWh/(m2·yr)={(Q×ΔP)/(η×1000)}×(24×365)/S. The air conditioner of the present disclosure is suitable for reducing power consumption even when including the air filter unit which is large in size and has high filtration performance. An air filter unit of the present disclosure is suitable for the air conditioner of the present disclosure.

公开(公告)号：US20200230536A1

公开(公告)日：2020-07-23

申请号：US16648468

申请日：2018-09-21

Applicant: NITTO DENKO CORPORATION

Inventor： Yuri HORIE ,  Masaaki MORI ,  Yukio ARIMITSU

IPC: B01D46/00 ,  B01D46/24 ,  B01D46/52 ,  B01D71/36 ,  B01D49/00

Abstract: The air filter medium of the present invention is an air filter medium including a stack of a porous polytetrafluoroethylene (PTFE) membrane and an air-permeable support member, a repulsive force generated in the medium when the medium is compressed in a thickness direction thereof is equal to or greater than 30 kPa and equal to or less than 150 kPa at a compression ratio of 30%, and at least one main surface of the air filter medium is formed by the air-permeable support member and has a maximum coefficient of friction of 24 gf or less. The air filter medium of the present invention is an air filter medium that uses a porous PTFE membrane and in which a decrease in collection efficiency due to pleating is inhibited.