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：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：US20220119682A1

公开(公告)日：2022-04-21

申请号：US17421121

申请日：2020-01-10

Applicant: YUPO CORPORATION

Inventor： Yutaro SUGAMATA ,  Ryota TOYAMA

IPC: C09J7/29 ,  C09J11/04 ,  C09J7/38 ,  B32B27/08 ,  B32B7/12 ,  B32B27/20 ,  B32B27/32 ,  B32B27/16 ,  B65D25/20 ,  G09F3/02 ,  G09F3/10 ,  G09F3/00

Abstract: A recording paper includes: a laminated resin film including a substrate composed of a thermoplastic resin film and an underlayer disposed on at least one side of the substrate and composed of a thermoplastic resin composition; and a resin coating disposed facing the underlayer of the laminated resin film, wherein the underlayer has an indentation modulus of 50 to 1200 MPa, the resin coating contains a resin that is a reaction product of a cationic water-soluble polymer and a silane coupling agent, a content of a silane coupling agent component is 15 to 60 parts by mass with respect to 100 parts by mass of the cationic water-soluble polymer component in the resin coating, the resin coating is free from thermoplastic resin particles, and a content of an inorganic filler is 9 parts by mass or less with respect to 100 parts by mass of the cationic water-soluble polymer component in the resin coating.

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：US20220267564A1

公开(公告)日：2022-08-25

申请号：US17630715

申请日：2020-07-29

Applicant: YUPO CORPORATION

Inventor： Ryota TOYAMA ,  Hiroshi KOIKE ,  Yutaro SUGAMATA

IPC: C08K3/26

Abstract: To suppress a decrease over time in the adhesion of ink to a thermoplastic resin film, provided is a thermoplastic resin film containing an inorganic filler, wherein at least one surface of the thermoplastic resin film satisfies the following formula (1) and formula (2): 0.8≤S1/S0≤1.0  (1) 3.0≤S0  (2) wherein S0 represents an oxygen atom concentration (atm %) before a washing treatment (A) is carried out, S1 represents the oxygen atom concentration (atm %) after the washing treatment (A) is carried out, the oxygen atom concentration is a ratio of the number of oxygen atoms to a sum of the number of oxygen atoms and the number of carbon atoms measured by XPS (X-ray photoelectron spectroscopy) (number of oxygen atoms/(number of oxygen atoms+number of carbon atoms)), and the washing treatment (A) is a washing treatment carried out using distilled water.

公开(公告)号：US20200181344A1

公开(公告)日：2020-06-11

申请号：US16628371

申请日：2018-06-28

Applicant: YUPO CORPORATION

Inventor： Takuya IKARASHI ,  Yutaro SUGAMATA

IPC: C08J7/04 ,  G03G7/00

Abstract: Provided are a recording paper having not only excellent appearance and high adhesion between a substrate and a resin coating but also high adhesion, particularly, high water resistant adhesion to ink or toner in various printing systems and a method for producing the recording paper. The recording paper of the present invention includes: a substrate composed of a thermoplastic resin film; and a resin coating disposed on at least one side of the substrate, wherein the resin coating contains a resin that is a reaction product of a cationic water-soluble polymer and a silane coupling agent, a content of a silane coupling agent component is 15 to 35 mass % based on a cationic water-soluble polymer component in the resin coating, and the resin coating is free from thermoplastic resin particles.

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.