公开(公告)号：US11433333B2

公开(公告)日：2022-09-06

申请号：US17040782

申请日：2019-03-27

Applicant: YUPO CORPORATION

Inventor： Yutaro Sugamata ,  Hiroshi Koike ,  Seiichiro Iida

IPC: B01D39/16 ,  B01D46/00 ,  B01D46/52 ,  B03C3/28 ,  B03C3/47 ,  B32B3/28 ,  B32B5/18 ,  B32B27/06 ,  B32B27/20 ,  B32B27/32

Abstract: The electret-treated sheet includes: a core layer (A) which is a porous film containing at least a thermoplastic resin; a surface layer (X) disposed on one side of the core layer (A); and a back surface layer (Y) disposed on the other side of the core layer (A), the surface layer (X) and the back surface layer (Y) each having a charged outermost surface, wherein the electret-treated sheet has a water vapor permeability coefficient of 0.1 to 2.5 g·mm/m2·24 hr; the core layer (A) has a pore aspect ratio of 5 to 50 and an average pore height of 2.5 to 15 μm; the surface layer (X) and the back surface layer (Y) each have a thickness of 5 to 200 μm; and the surface layer (X) includes a heat seal layer (B) including the outermost surface, wherein the heat seal layer (B) has a melting point of 50 to 140° C.

公开(公告)号：US11176918B2

公开(公告)日：2021-11-16

申请号：US16463400

申请日：2017-11-29

Applicant: YUPO CORPORATION ,  YAMAHA CORPORATION

Inventor： Hiroshi Koike ,  Yutaro Sugamata ,  Seiichiro Iida ,  Kunio Hiyama ,  Suguru Sasaki ,  Hidekazu Kodama

IPC: G10H3/14 ,  H01L41/047 ,  H01L41/193 ,  H01G7/02

Abstract: Provision of a piezoelectric element which uses a lightweight and flexible electret material and an electrode layer which is also lightweight, has high conductivity and good flexibility to easily receive electrical signals from an electret, and has good durability. Additionally, provision of a musical instrument provided with such a piezoelectric element. A piezoelectric element comprising an electrode layer (B) on at least one surface of an electret material (A) having pores inside, wherein a porosity of the electret material (A) is 20 to 80%, the electrode layer (B) contains 20 to 70 mass % of a carbon fine particle, and a thickness of the electrode layer (B) is 2 to 100 μm.

公开(公告)号：US11515810B2

公开(公告)日：2022-11-29

申请号：US16481983

申请日：2018-01-31

Applicant: YUPO CORPORATION

Inventor： Hiroshi Koike ,  Yutaro Sugamata ,  Seiichiro Iida

IPC: H02N1/08 ,  H01L41/047 ,  H01L41/113 ,  H01L41/18 ,  H01L41/193 ,  H01L41/253

Abstract: Provided is an energy conversion film excellent in charge retention performance and suppressed in deterioration of piezoelectricity even if it is exposed to a high temperature environment and an energy conversion element and the like using the film. An energy conversion element comprising: an energy conversion film at least comprises a charged resin film consisting of a resin film at least containing a thermoplastic resin and a metal soap; and an electrode provided on at least one of the two surfaces of the energy conversion film.

公开(公告)号：US20150210045A1

公开(公告)日：2015-07-30

申请号：US14409921

申请日：2013-06-21

Applicant: YUPO CORPORATION

Inventor： Hiroshi Koike ,  Yuichi Yahagi ,  Seiichiro Iida

IPC: B32B27/08 ,  B32B7/12 ,  B32B38/00 ,  G09F7/12 ,  B32B37/24 ,  B32B37/12 ,  B32B7/06 ,  G09F3/04

CPC classification number: B32B27/08 ,  B32B7/06 ,  B32B7/12 ,  B32B27/20 ,  B32B27/283 ,  B32B27/32 ,  B32B27/322 ,  B32B27/34 ,  B32B27/36 ,  B32B37/12 ,  B32B37/1284 ,  B32B37/24 ,  B32B38/0008 ,  B32B38/145 ,  B32B2037/1063 ,  B32B2037/243 ,  B32B2255/10 ,  B32B2255/26 ,  B32B2264/102 ,  B32B2264/104 ,  B32B2307/20 ,  B32B2307/412 ,  B32B2307/718 ,  B32B2310/025 ,  B32B2457/20 ,  B32B2590/00 ,  G09F3/04 ,  G09F7/12 ,  G09F2007/125 ,  Y10T428/1476 ,  Y10T428/24802 ,  Y10T428/24851 ,  Y10T428/24868 ,  Y10T428/24942 ,  Y10T428/2848 ,  Y10T428/31544

Abstract: An electrostatic adsorbable sheet (iii) of the present invention is a laminate obtained by laminating an adsorbable sheet (i) including a resin film layer (A) having an adhesive layer (C) formed over one surface thereof with a support layer (ii) including a resin layer (B), wherein the resin film layer (A) of the adsorbable sheet (i) and the resin film layer (B) of the support layer (ii) are adherent to each other by electrostatic adsorption.

Abstract translation: 本发明的静电吸附片（iii）是将具有在一个表面上形成有粘合剂层（C）的树脂膜层（A）的支持层（ii）层叠的可吸附片材（i） 包括树脂层（B），其中可吸附片材（i）的树脂膜层（A）和载体层（ii）的树脂膜层（B）通过静电吸附彼此附着。

公开(公告)号：US10670453B2

公开(公告)日：2020-06-02

申请号：US15907783

申请日：2018-02-28

Applicant: YAMAHA CORPORATION ,  YUPO CORPORATION

Inventor： Tomoya Miyata ,  Kunio Hiyama ,  Seiichiro Iida ,  Hiroshi Koike ,  Hidekazu Kodama

IPC: G10H3/14 ,  G01H11/08 ,  H01L41/193 ,  H01L41/053 ,  H01L41/113 ,  H04R17/02

Abstract: A sensor unit capable of protecting a piezoelectric element and detecting vibration and sound is provided. The sensor unit comprises a sheet-like piezoelectric element having a porous layer, and a sound propagation sheet covering at least one face of the piezoelectric element and permitting transmission of sound from a first face toward a second face of the sound propagation sheet. A difference in acoustic pressure level between the sound incident on the sound propagation sheet and the transmitted sound is preferably no greater than 10 dB. A surface density of the sound propagation sheet is preferably from 0.03 g/m2 to 100 g/m2. The sound propagation sheet is preferably flexible and preferably has voids. The sensor unit preferably further comprises a sound insulation sheet covering another face of the piezoelectric element and substantially preventing transmission of sound from a second face toward a first face of the sound insulation sheet.

公开(公告)号：US10010892B2

公开(公告)日：2018-07-03

申请号：US15028849

申请日：2014-10-15

Applicant: YUPO CORPORATION

Inventor： Hiroshi Koike ,  Yuichi Yahagi ,  Seiichiro Iida

IPC: B03C3/64 ,  B03C3/28 ,  B01D46/00 ,  B01D46/52 ,  B01D39/16 ,  B03C3/47 ,  B03C3/41

CPC classification number: B03C3/64 ,  B01D39/1623 ,  B01D39/1692 ,  B01D46/0032 ,  B01D46/526 ,  B01D2239/0435 ,  B01D2239/065 ,  B01D2239/069 ,  B03C3/28 ,  B03C3/41 ,  B03C3/47 ,  B03C2201/10

Abstract: An object of the present invention is to provide a low pressure loss filter having a high dust- and dirt-collecting capability and excellent workability and sustainability of collecting capability. The filter of the present invention is a filter having air channels formed using an electret sheet; a porosity of the electret sheet being from 1 to 70%; an air channel cross-sectional ratio of the filter being from 10 to 99%; and a volume charge density of the filter being from 10 to 5000 nC/cm3.

公开(公告)号：US11346709B2

公开(公告)日：2022-05-31

申请号：US16888033

申请日：2020-05-29

Applicant: YAMAHA CORPORATION ,  YUPO CORPORATION

Inventor： Tomoya Miyata ,  Kunio Hiyama ,  Seiichiro Iida ,  Hiroshi Koike ,  Hidekazu Kodama

IPC: G01H11/08 ,  G10H3/14 ,  H01L41/193 ,  H01L41/053 ,  H01L41/113 ,  H04R17/02

Abstract: A sensor unit capable of protecting a piezoelectric element and detecting vibration and sound is provided. The sensor unit comprises a sheet-like piezoelectric element having a porous layer, and a sound propagation sheet covering at least one face of the piezoelectric element and permitting transmission of sound from a first face toward a second face of the sound propagation sheet. A difference in acoustic pressure level between the sound incident on the sound propagation sheet and the transmitted sound is preferably no greater than 10 dB. A surface density of the sound propagation sheet is preferably from 0.03 g/m2 to 100 g/m2. The sound propagation sheet is preferably flexible and preferably has voids. The sensor unit preferably further comprises a sound insulation sheet covering another face of the piezoelectric element and substantially preventing transmission of sound from a second face toward a first face of the sound insulation sheet.