公开(公告)号：US20210108055A1

公开(公告)日：2021-04-15

申请号：US17047506

申请日：2019-04-25

Applicant: YUPO CORPORATION

Inventor： Seiichiro IIDA ,  Mitsuhiro ASHIKAGA

IPC: C08L23/06 ,  B32B27/32 ,  B32B27/08 ,  B32B27/20 ,  C08L23/12

Abstract: Provided are a stretched porous film and a film for printing that give a small amount of carbon dioxide gas emissions and have slight curling. A stretched porous film formed by stretching a resin composition comprising at least a polyethylene resin and an inorganic filler at least in a uniaxial direction, the polyethylene resin comprises a plant-derived polyethylene resin.

公开(公告)号：US20190393806A1

公开(公告)日：2019-12-26

申请号：US16481983

申请日：2018-01-31

Applicant: YUPO CORPORATION

Inventor： Hiroshi KOIKE ,  Yutaro SUGAMATA ,  Seiichiro IIDA

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

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：US20210001255A1

公开(公告)日：2021-01-07

申请号：US17040782

申请日：2019-03-27

Applicant: YUPO CORPORATION

Inventor： Yutaro SUGAMATA ,  Hiroshi KOIKE ,  Seiichiro IIDA

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

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：US20200309592A1

公开(公告)日：2020-10-01

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 ,  H01L41/193 ,  H01L41/053 ,  H01L41/113 ,  G10H3/14

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：US20190311702A1

公开(公告)日：2019-10-10

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 ,  H01L41/193 ,  H01L41/047

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：US20160250649A1

公开(公告)日：2016-09-01

申请号：US15028849

申请日：2014-10-15

Applicant: YUPO CORPORATION

Inventor： Hiroshi KOIKE ,  Yuichi YAHAGI ,  Seiichiro IIDA

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

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.

Abstract translation: 本发明的目的是提供一种具有高灰尘和集尘能力以及优异的可加工性和收集能力的可持续性的低压力损失过滤器。 本发明的过滤器是具有使用驻极体片形成的空气通道的过滤器， 驻极体片材的孔隙率为1〜70％。 过滤器的空气通道横截面积比为10至99％; 并且过滤器的体积电荷密度为10至5000nC / cm 3。

公开(公告)号：US20200009489A1

公开(公告)日：2020-01-09

申请号：US16491627

申请日：2018-03-07

Applicant: YUPO CORPORATION

Inventor： Yutaro SUGAMATA ,  Hiroshi KOIKE ,  Seiichiro IIDA

IPC: B01D46/00 ,  H01G7/02 ,  B03C3/28 ,  B01D39/16 ,  B32B27/16 ,  B32B27/32 ,  B32B27/08

Abstract: An object of the present invention is to provide a low pressure-loss type of filter which has a high dust collecting capability and suppresses the lowering of the dust collecting capability even after cleaning. The present invention relates to an electret-treated sheet including at least a surface layer, a high dielectric layer and a back-surface layer, while having the high dielectric layer between the surface layer and the back-surface layer, wherein the surface layer and the back-surface layer are each a thermoplastic resin film having a relative dielectric constant of smaller than 6 at 100 kHz; the high dielectric layer is a material having a relative dielectric constant of 6 or larger at 100 kHz; and the surface layer and the back-surface layer each have a static charge due to electrostatically charge; and to a filter using the same.

公开(公告)号：US20180209838A1

公开(公告)日：2018-07-26

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: G01H11/08 ,  G10H3/14 ,  H01L41/053 ,  H01L41/113 ,  H01L41/193

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：US20150375477A1

公开(公告)日：2015-12-31

申请号：US14790226

申请日：2015-07-02

Applicant: YUPO CORPORATION

Inventor： Tatsuya SUZUKI ,  Kou NAKAMURA ,  Kazuyuki KIMURA ,  Seiichiro IIDA

IPC: B32B7/06 ,  B32B3/26 ,  C09J7/02 ,  B32B27/32 ,  G09F3/02 ,  E04F13/00 ,  B32B27/08 ,  B32B5/16

CPC classification number: B32B7/06 ,  B32B3/10 ,  B32B3/263 ,  B32B3/266 ,  B32B5/16 ,  B32B27/08 ,  B32B27/32 ,  B32B33/00 ,  C09J7/29 ,  C09J129/04 ,  C09J2201/122 ,  C09J2203/334 ,  C09J2423/006 ,  C09J2425/006 ,  C09J2429/00 ,  E04F13/002 ,  G09F3/02 ,  G09F3/04 ,  G09F3/10 ,  G09F2003/0257 ,  Y10T428/1352 ,  Y10T428/24331 ,  Y10T428/24355 ,  Y10T428/24802 ,  Y10T428/25 ,  Y10T428/265 ,  Y10T428/2848 ,  Y10T428/31507 ,  Y10T428/31725 ,  Y10T428/31786 ,  Y10T428/31938

Abstract: A readily removable film containing a substrate layer (A) and a readily removable layer (B), wherein the substrate layer (A) contains a thermoplastic resin, the readily removable layer (B) contains from 30 to 60% by weight of a mixture of a crystalline polypropylene resin having a degree of crystallinity of at least 65% and a thermoplastic resin immiscible with the crystalline polypropylene resin, and from 40 to 70% by weight of a fine powder, in which the thermoplastic resin immiscible with the crystalline polypropylene resin is blended in a ratio of from 105 to 300 parts by weight relative to 100 parts by weight of the crystalline polypropylene resin, and the readily removable layer (B) is stretched at least monoaxially.

Abstract translation: 一种容易移除的膜，其包含基材层（A）和容易除去的层（B），其中基材层（A）含有热塑性树脂，容易除去的层（B）含有30至60重量％的混合物 具有结晶度至少为65％的结晶聚丙烯树脂和与结晶聚丙烯树脂不混溶的热塑性树脂和40-70％重量的细粉末，其中与结晶聚丙烯树脂不混溶的热塑性树脂 相对于100重量份的结晶聚丙烯树脂以105〜300重量份的比例共混，并且容易除去的层（B）至少单轴拉伸。