公开(公告)号：US20230253289A1

公开(公告)日：2023-08-10

申请号：US18002861

申请日：2021-05-27

Applicant: Seiki CHIBA ,  Mikio WAKI ,  ZEON CORPORATION

Inventor： Seiki CHIBA ,  Mikio WAKI ,  Mitsugu UEJIMA ,  Makoto TAKESHITA

IPC: H01L23/373 ,  C09K5/14

CPC classification number: H01L23/3733 ,  H01L23/3735 ,  C09K5/14

Abstract: The heat-dissipating material contains ground carbon particles derived from carbon nanotubes. Such a configuration can improve both elasticity and heat conductivity of the heat-dissipating material.

公开(公告)号：US20220071068A1

公开(公告)日：2022-03-03

申请号：US17420719

申请日：2020-01-28

Applicant: ZEON CORPORATION

Inventor： Arinobu KATADA ,  Tomoko YAMAGISHI ,  Mitsugu UEJIMA

IPC: H05K9/00 ,  C01B32/159

Abstract: An electromagnetic wave absorbing sheet includes a sheet-shaped fibrous substrate and a plurality of carbon nanotubes attached to the sheet-shaped fibrous substrate. The attached amount of the carbon nanotubes in the electromagnetic wave absorbing sheet is 5 mass % or more. The electromagnetic wave absorbing sheet has a surface resistance of 20 Ω/sq. or more.

公开(公告)号：US20210384408A1

公开(公告)日：2021-12-09

申请号：US17286890

申请日：2019-10-23

Applicant: Seiki CHIBA ,  Mikio WAKI ,  ZEON CORPORATION

Inventor： Seiki CHIBA ,  Mikio WAKI ,  Mitsugu UEJIMA ,  Makoto TAKESHITA

IPC: H01L41/047 ,  H01L41/193 ,  H01L41/083 ,  H01L41/297

Abstract: A dielectric elastomer transducer A1 includes a plurality of dielectric elastomer elements each including a dielectric elastomer layer 11 and a pair of electrode layers 12 and 13 flanking the dielectric elastomer layer 11. The plurality of dielectric elastomer elements include adjacent dielectric elastomer elements 1. One electrode layer 12 of one of the adjacent dielectric elastomer elements and one electrode layer 12 of the other one of the adjacent dielectric elastomer element have the same potential. Such a configuration ensures more stable use of the dielectric elastomer elements.

公开(公告)号：US20220314276A1

公开(公告)日：2022-10-06

申请号：US17596762

申请日：2020-06-17

Applicant: Seiki CHIBA ,  Mikio WAKI ,  ZEON CORPORATION

Inventor： Seiki CHIBA ,  Mikio WAKI ,  Mitsugu UEJIMA ,  Makoto TAKESHITA

IPC: B06B1/02

Abstract: A dielectric elastomer transducer according to the present invention includes a dielectric elastomer layer, and a pair of electrode layers sandwiching the dielectric elastomer layer. The electrode layers contain a binder and carbon black. The carbon black has a particle size distribution as measured by dynamic light scattering in which not less than 95% falls in a range of 0.15 to 8.0 μm. The carbon black has a particle size as measured by laser scattering ranging from 0.4 to 50 μm. The particle size distribution of the carbon black as measured by dynamic light scattering has a first peak that falls in a first range of 0.15 to 1.0 μm and a second peak that falls in a second range of 1.0 μm to 8.0 μm. This structure achieves both stretchability and electrical conductivity of the electrode layers.

公开(公告)号：US20220131066A1

公开(公告)日：2022-04-28

申请号：US17422749

申请日：2020-01-16

Applicant: Seiki CHIBA ,  Mikio WAKI ,  ZEON CORPORATION

Inventor： Seiki CHIBA ,  Mikio WAKI ,  Noriyuki OYA ,  Makoto TAKESHITA ,  Mitsugu UEJIMA

IPC: H01L41/047 ,  H01L41/09 ,  H01L41/113

Abstract: A dielectric elastomer transducer Al includes a dielectric elastomer layer 11 and a pair of electrode layers 12 sandwiching the dielectric elastomer layer 11. The electrode layers 12 contain ground carbon particles derived from carbon nanotubes. This configuration ensures both stretchability and electrical conductivity.

公开(公告)号：US20170121178A1

公开(公告)日：2017-05-04

申请号：US15311933

申请日：2015-05-18

Applicant: ZEON CORPORATION

Inventor： Masahiro SHIGETA ,  Mitsugu UEJIMA

IPC: H01B1/24 ,  C08K3/04 ,  C08J3/215 ,  C08K7/06

CPC classification number: C08K3/04 ,  C01B32/05 ,  C01B32/168 ,  C01B2202/32 ,  C01B2202/36 ,  C08J3/16 ,  C08J3/215 ,  C08J2309/04 ,  C08K7/06 ,  C08K2201/001 ,  C08L101/00

Abstract: Provided is a method for efficiently producing a carbon nanotube (CNT) dispersion liquid of highly dispersed CNTs while also suppressing damage to the CNTs. The method for producing a carbon nanotube dispersion liquid includes a dispersing step that includes at least one cycle of dispersing treatment in which pressure is applied to a coarse dispersion liquid containing carbon nanotubes and a dispersion medium, the coarse dispersion liquid is fed under pressure, and shear force is applied to the coarse dispersion liquid such as to disperse the carbon nanotubes. A plurality of repetitions of the dispersing step are performed while altering the pressure that is applied to the coarse dispersion liquid. In at least one instance, the pressure applied to the coarse dispersion liquid is altered by at least 10 MPa between consecutive repetitions of the dispersing step.

公开(公告)号：US20230080840A1

公开(公告)日：2023-03-16

申请号：US17904290

申请日：2021-02-17

Applicant: ZEON CORPORATION

Inventor： Tomoko YAMAGISHI ,  Mitsugu UEJIMA

IPC: C01B32/162 ,  H05K9/00

Abstract: The present disclosure is directed to providing a carbon film having an excellent shield performance against electromagnetic waves. The carbon film of the present disclosure is a carbon film made of a carbon nanotube assembly, wherein a pore distribution curve of the carbon film indicating the relationship between the pore size and the Log differential pore capacity obtained from an adsorption isotherm at 77 K of liquid nitrogen based on the Barrett-Joyner-Halenda method has a peak in which the Log differential pore capacity is maximized within a pore size range of 10 nm or more and 100 nm or less, and the value of the Log differential pore capacity at the peak is 1.2 cm3/g or more.

公开(公告)号：US20220039299A1

公开(公告)日：2022-02-03

申请号：US17276527

申请日：2019-09-25

Applicant: ZEON CORPORATION

Inventor： Tomoko YAMAGISHI ,  Mitsugu UEJIMA

IPC: H05K9/00 ,  C01B32/174 ,  C01B32/159

Abstract: Disclosed is an electromagnetic wave absorbing sheet which comprises a sheet-shaped fibrous substrate and carbon nanotubes positioned in a space inside in a thickness direction of the sheet-shaped fibrous substrate, wherein the fibrous substrate is composed of organic fibers, the carbon nanotubes comprise single-walled carbon nanotubes as a main component, and the electromagnetic wave absorbing sheet has an electrical conductivity of 0.7 S/cm or more and 20 S/cm or less.

公开(公告)号：US20200277192A1

公开(公告)日：2020-09-03

申请号：US16647872

申请日：2018-09-27

Applicant: ZEON CORPORATION

Inventor： Tomoko YAMAGISHI ,  Mitsugu UEJIMA

IPC: C01B32/159

Abstract: Provided is a material that has excellent handleability and processability, and that when used as a support for a different material, enables support of the different material up to an inner part thereof. A carbon sheet contains one or more carbon nanotubes and has a porosity of not less than 5% and not more than 90%. The carbon sheet preferably includes: a porous substrate made from carbon; and the carbon nanotubes, attached to the porous substrate. The carbon nanotubes contained in the carbon sheet are preferably single-walled carbon nanotubes. Moreover, the carbon nanotubes contained in the carbon sheet preferably have a nitrogen adsorption specific surface area of 600 m2/g or more.

公开(公告)号：US20180127273A1

公开(公告)日：2018-05-10

申请号：US15574493

申请日：2016-05-26

Applicant: ZEON CORPORATION

Inventor： Tsutomu NAGAMUNE ,  Mitsugu UEJIMA ,  Tomoko YAMAGISHI

IPC: C01B32/162 ,  C01B32/17 ,  C01B32/05 ,  C01B32/154 ,  C01B32/178

CPC classification number: C01B32/162 ,  B82Y30/00 ,  B82Y40/00 ,  C01B32/05 ,  C01B32/154 ,  C01B32/159 ,  C01B32/16 ,  C01B32/17 ,  C01B32/174 ,  C01B32/178 ,  C01B2202/02

Abstract: Provided are a carbon film having excellent electrical conductivity and a method of producing this carbon film. The carbon film has a film surface glossiness at 60° of at least 2 and not more than 500. The method of producing the carbon film includes forming a carbon film by removing a solvent from a fibrous carbon nanostructure dispersion liquid containing the solvent and one or more fibrous carbon nanostructures.