Patents by Inventor Hiroko IKENAGA
Hiroko IKENAGA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9580624Abstract: The present invention realizes a display device or input device having excellent ultraviolet protection property for the touch panel, display element or the like, while retaining optical characteristics, even when a small amount of or no optical film is used. The pressure-sensitive adhesive sheet of the present invention has a total light transmittance of 85% or more, a light transmittance at a wavelength of 380 nm of 5% or less, and a haze of 3% or less. The pressure-sensitive adhesive sheet preferably includes a pressure-sensitive adhesive layer containing an acrylic polymer and a triazine-based ultraviolet absorber.Type: GrantFiled: March 26, 2015Date of Patent: February 28, 2017Assignee: NITTO DENKO CORPORATIONInventors: Koji Shitara, Hiroko Ikenaga, Hiroaki Kishioka
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Patent number: 9382453Abstract: A paint film-protecting sheet (1) is provided which effectively prevents adhesive transfer to the paint film. The paint film-protecting sheet (1) has a pressure-sensitive adhesive layer which is comprised of a non-crosslinking pressure-sensitive adhesive (20) adjacent a polyolefin-based resin film serving as a supporting substrate (10). At least a surface portion (12) of the supporting substrate that adjoins the pressure-sensitive adhesive layer satisfies the following conditions: (1) it has an indentation modulus at 25° C. (Er(25)) of from 200 MPa to 1,100 MPa and (2) it has an indentation modulus at ?5° C. (Er(?5)) of from 400 MPa to 2,400 MPa.Type: GrantFiled: November 22, 2010Date of Patent: July 5, 2016Assignees: NITTO DENKO CORPORATION, KANSAI PAINT CO. LTD.Inventors: Toshitaka Suzuki, Takeshi Igarashi, Hiroko Ikenaga, Yuki Saitou, Shinji Inokuchi, Koji Yamaguchi, Yoshikuni Hirano
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Patent number: 9382454Abstract: A paint film-protecting sheet (1) that effectively prevents adhesive transfer to the paint film is provided. The paint film-protecting sheet (1) includes a pressure-sensitive adhesive (PSA) layer (20), which is comprised of a non-crosslinking PSA, disposed on a polyolefin-based resin film serving as a supporting substrate (10). At least a surface portion (12) of the supporting substrate which adjoins the PSA layer is formed of a resin material that satisfies both of the following conditions: (1) it contains W wt % of a LLDPE having a density d of 0.925 g/cm3 or less, wherein W is greater than or equal to 20; and (2) it has a LLDPE content index ? of 400 or more, the LLDPE content index ? being defined as (0.935?d)×W×1000.Type: GrantFiled: November 22, 2010Date of Patent: July 5, 2016Assignees: NITTO DENKO CORPORATION, KANSAI PAINT CO., LTD.Inventors: Toshitaka Suzuki, Takeshi Igarashi, Hiroko Ikenaga, Yuki Saitou, Shinji Inokuchi, Koji Yamaguchi, Yoshikuni Hirano
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Publication number: 20150344662Abstract: Provided are: a polyetherimide porous body which has a fine cell structure, a low relative permittivity and a high insulation breakdown voltage; and a method for producing the same. This polyetherimide porous body comprises a crosslinked body in which a polyetherimide having a specific repeated structural unit is ring-opened and crosslinked with a polyamine compound.Type: ApplicationFiled: December 9, 2013Publication date: December 3, 2015Inventors: Shinpei YAKUWA, Yumi TAKEKAWA, Tomoyuki KASAGI, Hiroko IKENAGA
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Publication number: 20150329675Abstract: Provided are: a polyetherimide porous body which has a low relative permittivity and is not easily cracked (or is excellent in cracking resistance) when folded, and a method for producing the porous body. This polyetherimide porous body comprises a polyetherimide crosslinked body and has a gel fraction of 10% or more, an average cell diameter of 8 ?m or less, a volume porosity of 30% or more and an insulation breakdown voltage of 30 kV/mm or more.Type: ApplicationFiled: December 9, 2013Publication date: November 19, 2015Inventors: Yumi Takekawa, Shinpei Yakuwa, Tomoyuki Kasagi, Hiroko Ikenaga
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Publication number: 20150197670Abstract: The present invention realizes a display device or input device having excellent ultraviolet protection property for the touch panel, display element or the like, while retaining optical characteristics, even when a small amount of or no optical film is used. The pressure-sensitive adhesive sheet of the present invention has a total light transmittance of 85% or more, a light transmittance at a wavelength of 380 nm of 5% or less, and a haze of 3% or less. The pressure-sensitive adhesive sheet preferably includes a pressure-sensitive adhesive layer containing an acrylic polymer and a triazine-based ultraviolet absorber.Type: ApplicationFiled: March 26, 2015Publication date: July 16, 2015Applicant: NITTO DENKO CORPORATIONInventors: Koji SHITARA, Hiroko IKENAGA, Hiroaki KISHIOKA
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Patent number: 9045670Abstract: The present invention realizes a display device or input device having excellent ultraviolet protection property for the touch panel, display element or the like, while retaining optical characteristics, even when a small amount of or no optical film is used. The pressure-sensitive adhesive sheet of the present invention has a total light transmittance of 85% or more, a light transmittance at a wavelength of 380 nm of 5% or less, and a haze of 3% or less. The pressure-sensitive adhesive sheet preferably includes a pressure-sensitive adhesive layer containing an acrylic polymer and a triazine-based ultraviolet absorber.Type: GrantFiled: September 27, 2012Date of Patent: June 2, 2015Assignee: NITTO DENKO CORPORATIONInventors: Koji Shitara, Hiroko Ikenaga, Hiroaki Kishioka
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Publication number: 20140295168Abstract: An object of the present invention is to provide an electrically insulating resin sheet which is excellent in heat resistance and insulating properties and is able to maintain a predetermined shape even after applying an external force to the sheet to deform the sheet into a predetermined shape and removing the external force. An electrically insulating resin sheet having a porosity of 10 to 60%, a stress relaxation ratio of 20% or more when the sheet is extended by 5% at 23° C. and maintained for 10 minutes, and an insulation breakdown voltage of 25 kV/mm or more.Type: ApplicationFiled: February 28, 2013Publication date: October 2, 2014Inventors: Hiroko Ikenaga, Tomoyuki Kasagi, Shinpei Yakuwa, Keiko Akiyama
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Publication number: 20130316138Abstract: Provided is a protective sheet for glasses, which has excellent workability, visibility and transparency. A protective sheet for glasses, characterized by having a distinctness of image of 70% or more and an internal haze of 3.0% or less as measured in accordance with JIS K7136.Type: ApplicationFiled: January 26, 2012Publication date: November 28, 2013Applicant: NITTO DENKO CORPORATIONInventors: Hiroko Ikenaga, Takeshi Igarashi, Toshitaka Suzuki, Akifumi Kido, Yuki Saitou
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Publication number: 20130309481Abstract: Provided are: an electrically insulating resin sheet for motors, which is used for achieving the insulation between coil wires or between a coil wire and an iron core in a motor, and which has high heat resistance, high electrical insulation performance and a high insulation breakdown voltage; and a process for producing the electrically insulating resin sheet. The electrically insulating resin sheet for motors, which is provided with a porous resin layer comprising a thermoplastic resin, is characterized in that the resin sheet has a relative permittivity of 2.0 or less at 1 GHz. It is preferred that the porous resin layer has an average cell diameter of 5.0 ?m or less and contains cells in such an amount that the porosity is 30% or more.Type: ApplicationFiled: February 2, 2012Publication date: November 21, 2013Applicant: NITTO DENKO CORPORATIONInventors: Tomoyuki Kasagi, Hiroichi Ukei, Yoshiko Kira, Takeshi Sutou, Keiko Akiyama, Shinpei Yakuwa, Hiroko Ikenaga
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Publication number: 20130309476Abstract: Provided is a protective sheet for glasses, which has excellent workability, adhesion reliability, visibility and impact resistance. A protective sheet for glasses, characterized by having a scratched area ratio of 0.15% or less as measured in an impact resistance test, a tensile elastic modulus of 50 MPa to 3500 MPa as measured in accordance with JIS K7124, a bending strength of 2.0×107 to 5.5×1010 ?m3·MPa, a distinctness of image of 70% or more, and a thickness of 45 to 250 ?m.Type: ApplicationFiled: January 26, 2012Publication date: November 21, 2013Applicant: NITTO DENKO CORPORATIONInventors: Hiroko Ikenaga, Takeshi Igarashi, Toshitaka Suzuki, Akifumi Kido, Yuki Saitou
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Publication number: 20110129655Abstract: A paint film-protecting sheet (1) that effectively prevents adhesive transfer to the paint film is provided. The paint film-protecting sheet (1) includes a pressure-sensitive adhesive (PSA) layer (20), which is comprised of a non-crosslinking PSA, disposed on a polyolefin-based resin film serving as a supporting substrate (10). At least a surface portion (12) of the supporting substrate which adjoins the PSA layer is formed of a resin material that satisfies both of the following conditions: (1) it contains W wt % of a LLDPE having a density d of 0.925 g/cm3 or less, wherein W is greater than or equal to 20; and (2) it has a LLDPE content index ? of 400 or more, the LLDPE content index ? being defined as (0.935?d)×W×1000.Type: ApplicationFiled: November 22, 2010Publication date: June 2, 2011Applicants: NITTO DENKO CORPORATION, KANSAI PAINT CO. LTD.Inventors: Toshitaka SUZUKI, Takeshi IGARASHI, Hiroko IKENAGA, Yuki SAITOU, Shinji INOKUCHI, Koji YAMAGUCHI, Yoshikuni HIRANO
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Publication number: 20110126983Abstract: A paint film-protecting sheet (1) is provided which effectively prevents adhesive transfer to the paint film. The paint film-protecting sheet (1) has a pressure-sensitive adhesive layer which is comprised of a non-crosslinking pressure-sensitive adhesive (20) adjacent a polyolefin-based resin film serving as a supporting substrate (10). At least a surface portion (12) of the supporting substrate that adjoins the pressure-sensitive adhesive layer satisfies the following conditions: (1) it has an indentation modulus at 25° C. (Er(25)) of from 200 MPa to 1,100 MPa and (2) it has an indentation modulus at ?5° C. (Er(?5)) of from 400 MPa to 2,400 MPa.Type: ApplicationFiled: November 22, 2010Publication date: June 2, 2011Applicants: NITTO DENKO CORPORATION, KANSAI PAINT CO. LTD.Inventors: Toshitaka SUZUKI, Takeshi IGARASHI, Hiroko IKENAGA, Yuki SAITOU, Shinji INOKUCHI, Koji YAMAGUCHI, Yoshikuni HIRANO