Patents by Inventor Kohei Doi

Kohei Doi 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).

  • Publication number: 20200030772
    Abstract: Provided is an adsorption temporary fixing sheet having a sufficient shear adhesive strength in a direction parallel to its surface, and having a weak adhesive strength in a direction vertical to the surface. Also provided is a method of producing such adsorption temporary fixing sheet. The adsorption temporary fixing sheet includes a foam layer including an open-cell structure, wherein, when a silicon chip vertical adhesive strength of a surface of the foam layer after 20 hours at each of such different temperatures as ?40° C., 23° C., or 125° C. is represented by V1 (N/1 cm?), V2 (N/1 cm?), or V3 (N/1 cm?) and when a silicon chip shearing adhesive strength of the surface of the foam layer after 20 hours at each of the different temperatures (?40° C., 23° C., or 125° C.) is represented by H1 (N/1 cm?), H2 (N/1 cm?), or H3 (N/1 cm?), relationships of V1<H1, V2<H2, and V3<H3 are satisfied.
    Type: Application
    Filed: January 22, 2018
    Publication date: January 30, 2020
    Inventors: Toru ISEKI, Kohei DOI, Mitsuhiro KANADA, Kazumichi KATO, Hideyuki TOKUYAMA
  • Patent number: 10316156
    Abstract: There is provided a foamed sheet which takes only a short time to recover the thickness thereof after being compressed, and even if being subjected to repeated impacts, hardly decreases in the impact absorption. The foamed sheet according to the present invention comprises a foamed body formed of a resin composition comprising: a thermoplastic resin a and a silicone-based compound b having not more than 2,000 siloxane bonds; and/or a thermoplastic resin a? having a silicone chain having not more than 2,000 siloxane bonds. The thermoplastic resin a is preferably at least one selected from the group consisting of acrylic polymers, rubbers, urethanic polymers and ethylene-vinyl acetate copolymers. The silicone-based compound b is preferably at least one selected from the group consisting of silicone oils, modified silicone oils and silicone resins.
    Type: Grant
    Filed: September 18, 2015
    Date of Patent: June 11, 2019
    Assignee: NITTO DENKO CORPORATION
    Inventors: Kohei Doi, Kazumichi Kato, Hideyuki Tokuyama, Tadao Takahashi
  • Publication number: 20190106602
    Abstract: An adsorption temporary fixing material comprises an adsorption temporary fixing sheet including a foam layer having an open-cell structure, wherein the adsorption temporary fixing material includes the foam layer in the entirety of the sheet or on at least one surface thereof, wherein a shear adhesive strength of a surface of the foam layer with a SUS304BA plate at 23° C. is 1 N/100 mm2 or more at a tensile rate of 50 mm/min, wherein a peel strength of the surface of the foam layer from the SUS304BA plate at 23° C. is 1 N/20 mm or less at a peel angle of 180° and a tensile rate of 300 mm/min, and wherein a weight change ratio after the adsorption temporary fixing sheet has been immersed in distilled water for 1 minute and then water droplets have been wiped off the surface thereof is 50% or less.
    Type: Application
    Filed: February 27, 2017
    Publication date: April 11, 2019
    Inventor: Kohei DOI
  • Publication number: 20190001618
    Abstract: Provided is a silicone foam sheet that expresses excellent bubble removability, that has satisfactory adhesiveness with an adherend and satisfactory sealability, that maintains the expression of these effects even when its thickness is reduced, that preferably expresses a stable modulus of elasticity over a region from a low-temperature region to a high-temperature region, and that suppresses both of its compression set in the low-temperature region and its compression set in the high-temperature region to low levels. Also provided is a method of producing such silicone foam sheet. The silicone foam sheet comprises an open-cell structure having a thickness of from 10 ?m to 3,000 ?m, wherein wherein an open-cell ratio is 90% or more, an average cell diameter of the silicone foam sheet is from 1 ?m to 50 ?m, and 90% or more of all cells therein has a cell diameter of 80 ?m or less.
    Type: Application
    Filed: December 16, 2016
    Publication date: January 3, 2019
    Inventors: Kohei DOI, Toru ISEKI, Akihiro NAKAMURA, Syuji ENDO
  • Publication number: 20180363134
    Abstract: A film forming method comprises loading a substrate on a rotary table, forming an adsorption region for adsorbing a raw material gas to the substrate by discharging the raw material gas from multiple discharge ports, forming a reaction region, to which a reaction gas is supplied, at a position spaced from the adsorption region, separating an atmosphere of the adsorption region and an atmosphere of the reaction region by exhausting and by supplying a purge gas, forming a film by performing a cycle a plurality of times to deposit the reaction product on the substrate, the cycle comprising passing the substrate through the adsorption region and the reaction region and setting a combination of flow rates of the raw material gas for a first pattern in order to perform the cycle with the first pattern and for a second pattern in order to perform the cycle with the second pattern.
    Type: Application
    Filed: June 15, 2018
    Publication date: December 20, 2018
    Inventors: Manabu HONMA, Yuka NAKASATO, Kohei DOI
  • Patent number: 10105929
    Abstract: A foamed sheet according to the present invention has a thickness of 30 to 500 ?m and includes a foam. The foam has a density of 0.2 to 0.7 g/cm3, an average cell diameter of 10 to 150 ?m, and a peak top of loss tangent (tan ?) occurring in a temperature range of from ?30° C. to 30° C., where the loss tangent is defined as the ratio of a loss modulus to a storage modulus determined at an angular frequency of 1 rad/s in dynamic viscoelastic measurement of the foam. The foam preferably has a maximum of the loss tangent (tan ?) in the temperature range of from ?30° C. to 30° C. of 0.2 or more.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: October 23, 2018
    Assignee: NITTO DENKO CORPORATION
    Inventors: Kohei Doi, Kunio Nagasaki, Tetsuya Otsuka, Mika Okada, Kazumichi Kato, Hideyuki Tokuyama, Tsunaki Kitahara, Tadao Takahashi, Kiichiro Matsushita
  • Patent number: 9707742
    Abstract: There is provided a flame-resistant composite member exhibiting remarkably high flame resistance even if having a flammable base material. The flame-resistant composite member according to the present invention has a film formed of a silicone resin composition (C) containing at least an inorganic oxide particle-containing condensation-reactive silicone resin on at least one surface of a base material. The inorganic oxide particle-containing condensation-reactive silicone resin may be a condensation-reactive silicone resin (A) including a crosslinked structural body wherein an inorganic oxide particle dispersed in a polysiloxane resin having a condensation-reactive group and the polysiloxane resin are crosslinked through a chemical bond. The silicone resin composition (C) may contain the condensation-reactive silicone resin (A) and an inorganic particle (B).
    Type: Grant
    Filed: November 13, 2012
    Date of Patent: July 18, 2017
    Assignee: NITTO DENKO CORPORATION
    Inventors: Kohei Doi, Kunio Nagasaki, Yusuke Sugino, Takafumi Hida, Yusuke Nakayama, Keisuke Hirano
  • Publication number: 20170121481
    Abstract: Provided is a resin foam (13) that highly restrains the occurrence of display irregularities in a display unit when the resin foam is used in a touch-screen-equipped device (1), where the display irregularities may occur with user's touch operations. The resin foam (13) according to the present invention is obtained by expansion of a resin composition including a resin. The resin foam has a 25% compression load of 0.1 N/cm2 to 8.0 N/cm2 and is used in the touch-screen-equipped device (1). The resin is preferably at least one resin selected from the group consisting of polyolefin resins, polyester resins, and acrylic resins.
    Type: Application
    Filed: March 12, 2015
    Publication date: May 4, 2017
    Applicant: NITTO DENKO CORPORATION
    Inventors: Itsuhiro HATANAKA, Tetsuya OTSUKA, Yusuke YAMANARI, Hiroyuki SUZUKI, Kazumichi KATO, Kohei DOI
  • Publication number: 20160303822
    Abstract: The foamed sheet includes a foamed body having an average cell diameter of 10 to 200 ?m, and a compression set at 80° C. of not more than 80% and an impact absorption change rate of not more than ±20% defined by: Impact absorption change rate (%)={(an impact absorption rate b after high-temperature compression?an initial impact absorption rate a)/the initial impact absorption rate a}×100, where the impact absorption rate a is an impact absorption rate (%) of a test piece A and the impact absorption rate b (%) after high-temperature compression is an impact absorption rate (%) acquired by storing the test piece A at 80° C. for 72 hours in the state of being compressed by 60% with respect to the initial thickness of the test piece A, thereafter releasing the compression state, and thereafter conducting measurement after a lapse of 24 hours at 23° C.
    Type: Application
    Filed: September 18, 2015
    Publication date: October 20, 2016
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kazumichi KATO, Kohei DOI, Hideyuki TOKUYAMA, Tadao TAKAHASHI
  • Publication number: 20160304680
    Abstract: There is provided a foamed sheet which takes only a short time to recover the thickness thereof after being compressed, and even if being subjected to repeated impacts, hardly decreases in the impact absorption. The foamed sheet according to the present invention comprises a foamed body formed of a resin composition comprising: a thermoplastic resin a and a silicone-based compound b having not more than 2,000 siloxane bonds; and/or a thermoplastic resin a? having a silicone chain having not more than 2,000 siloxane bonds. The thermoplastic resin a is preferably at least one selected from the group consisting of acrylic polymers, rubbers, urethanic polymers and ethylene-vinyl acetate copolymers. The silicone-based compound b is preferably at least one selected from the group consisting of silicone oils, modified silicone oils and silicone resins.
    Type: Application
    Filed: September 18, 2015
    Publication date: October 20, 2016
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kohei Doi, Kazumichi Kato, Hideyuki Tokuyama, Tadao Takahashi
  • Publication number: 20160221299
    Abstract: A foamed sheet according to the present invention has a thickness of 30 to 500 ?m and includes a foam. The foam has a density of 0.2 to 0.7 g/cm3, an average cell diameter of 10 to 150 ?m, and a peak top of loss tangent (tan ?) occurring in a temperature range of from ?30° C. to 30° C., where the loss tangent is defined as the ratio of a loss modulus to a storage modulus determined at an angular frequency of 1 rad/s in dynamic viscoelastic measurement of the foam. The foam preferably has a maximum of the loss tangent (tan ?) in the temperature range of from ?30° C. to 30° C. of 0.2 or more.
    Type: Application
    Filed: August 21, 2014
    Publication date: August 4, 2016
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kohei DOI, Kunio NAGASAKI, Tetsuya OTSUKA, Mika OKADA, Kazumichi KATO, Hideyuki TOKUYAMA, Tsunaki KITAHARA, Tadao TAKAHASHI, Kiichiro MATSUSHITA
  • Patent number: 9382402
    Abstract: The flame-retardant silicone resin composition of the present invention comprises: an inorganic oxide particle-containing condensation-reactive silicone resin (A) comprising a crosslinking structure in which inorganic oxide particles dispersed in a polysiloxane resin having a condensation-reactive group are crosslinked with the polysiloxane resin by chemical bonds; and inorganic particles (B). The inorganic oxide particles are preferably at least one type of inorganic oxide particles selected from the group consisting of silica, alumina, glass frit, and antimony-doped tin oxide.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: July 5, 2016
    Assignee: NITTO DENKO CORPORATION
    Inventors: Kohei Doi, Kunio Nagasaki, Yusuke Sugino, Takafumi Hida, Yusuke Nakayama, Keisuke Hirano
  • Publication number: 20150299529
    Abstract: Provided is technical means for making various base materials non-combustible to improve fire resistance, the technical means being capable of imparting sufficiently high fire resistance, which meets the accreditation criteria for a fire-proof material under the Building Standard Law to the extent possible, to the various base materials with ease at low cost. Also provided is a fire-resistant construction material having sufficiently high fire resistance, which meets the accreditation criteria for a fire-proof material under the Building Standard Law to the extent possible, with ease at low cost. A fire-resistant pressure-sensitive adhesive tape of the present invention is a fire-resistant pressure-sensitive adhesive tape, including: a fire-resistant layer; and a pressure-sensitive adhesive layer, in which the fire-resistant layer includes aluminum.
    Type: Application
    Filed: March 7, 2013
    Publication date: October 22, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kohei DOI, Kunio NAGASAKI, Yusuke SUGINO, Takafumi HIDA, Yusuke NAKAYAMA
  • Publication number: 20150062896
    Abstract: The flame-retardant silicone resin composition of the present invention comprises: an inorganic oxide particle-containing condensation-reactive silicone resin (A) comprising a crosslinking structure in which inorganic oxide particles dispersed in a polysiloxane resin having a condensation-reactive group are crosslinked with the polysiloxane resin by chemical bonds; and inorganic particles (B). The inorganic oxide particles are preferably at least one type of inorganic oxide particles selected from the group consisting of silica, alumina, glass frit, and antimony-doped tin oxide.
    Type: Application
    Filed: April 9, 2013
    Publication date: March 5, 2015
    Applicant: NITTO DENKO CORPORATION
    Inventors: Kohei Doi, Kunio Nagasaki, Yusuke Sugino, Takafumi Hida, Yusuke Nakayama, Keisuke Hirano
  • Publication number: 20140301090
    Abstract: There is provided a flame-resistant composite member exhibiting remarkably high flame resistance even if having a flammable base material. The flame-resistant composite member according to the present invention has a film formed of a silicone resin composition (C) containing at least an inorganic oxide particle-containing condensation-reactive silicone resin on at least one surface of a base material. The inorganic oxide particle-containing condensation-reactive silicone resin may be a condensation-reactive silicone resin (A) including a crosslinked structural body wherein an inorganic oxide particle dispersed in a polysiloxane resin having a condensation-reactive group and the polysiloxane resin are crosslinked through a chemical bond. The silicone resin composition (C) may contain the condensation-reactive silicone resin (A) and an inorganic particle (B).
    Type: Application
    Filed: November 13, 2012
    Publication date: October 9, 2014
    Inventors: Kohei Doi, Kunio Nagasaki, Yusuke Sugino, Takafumi Hida, Yusuke Nakayama, Keisuke Hirano
  • Publication number: 20140287225
    Abstract: The present invention provides a transparent heat-resistant non-flammable film that has high transparency, heat resistance, and flame retardancy. The transparent heat-resistant non-flammable film according to the present invention includes a transparent heat-resistant protective layer comprising a polysiloxane resin containing a particulate inorganic oxide as a crosslinking agent on at least one surface of a transparent amorphous thermoplastic resin film having a heat distortion temperature of 250° C. or less. The transparent heat-resistant protective layer preferably has a refractive index in the range of 1.40 to 1.43. The transparent heat-resistant protective layer preferably has a thickness in the range of 1 to 100 ?m.
    Type: Application
    Filed: October 31, 2012
    Publication date: September 25, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Keisuke Hirano, Kohei Doi, Yusuke Sugino, Shigeki Ishiguro
  • Publication number: 20140135417
    Abstract: Provided is a transparent pressure-sensitive adhesive agent convertible into an adhesive agent that allows adherends to be instantly fixed to each other, allows the adherends to be reattached to each other, is excellent in processability such as being able to be cut into a sheet shape, is not peeled from the adherends even when exposed to a high-temperature atmosphere such as one in a fire, and has such transparency as to hardly impair the designs of the adherends. The transparent pressure-sensitive adhesive agent convertible into an adhesive agent has pressure-sensitive adhesive property before being sintered, and has adhesive property after being sintered.
    Type: Application
    Filed: July 13, 2012
    Publication date: May 15, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yusuke Sugino, Kunio Nagasaki, Kohei Doi, Takafumi Hida, Yusuke Nakayama
  • Publication number: 20140004331
    Abstract: Provided is a shatterproofing member including a pressure-sensitive adhesive layer convertible into an adhesive layer, which allows adherends to be instantly fixed to each other, allows the adherends to be reattached to each other, is excellent in processability such as being able to be cut into a sheet shape, is not peeled from the adherends even when exposed to a high-temperature atmosphere such as one in a fire, and can express shatterproof property when attached to an adherend that is broken by combustion such as glass even if exposed to combustion during a fire or the like. The shatterproofing member including a pressure-sensitive adhesive layer convertible into an adhesive layer includes: a pressure-sensitive adhesive layer convertible into an adhesive layer; and a flame-resistant material, in which the pressure-sensitive adhesive layer convertible into an adhesive layer has pressure-sensitive adhesive property before being sintered, and has adhesive property after being sintered.
    Type: Application
    Filed: March 9, 2012
    Publication date: January 2, 2014
    Applicant: NITTO DENKO CORPORATION
    Inventors: Takafumi Hida, Kunio Nagasaki, Yusuke Sugino, Kohei Doi, Yusuke Nakayama
  • Publication number: 20130309487
    Abstract: Provided is a pressure-sensitive adhesive agent convertible into an adhesive agent, which allows adherends to be instantly fixed to each other, allows the adherends to be reattached to each other, is excellent in processability such as being able to be cut into a sheet shape, and is not peeled from the adherends even when exposed to a high-temperature atmosphere such as one in a fire. The pressure-sensitive adhesive agent convertible into an adhesive agent has pressure-sensitive adhesive property before being sintered, and has adhesive property after being sintered.
    Type: Application
    Filed: February 3, 2012
    Publication date: November 21, 2013
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yusuke Sugino, Kunio Nagasaki, Kohei Doi, Takafumi Hida, Yusuke Nakayama
  • Publication number: 20130309482
    Abstract: Provided is a flame-retardant member having thermal functionality, flexibility, and a high level of flame retardancy. The thermally functional flame-retardant polymer member includes a polymer layer (B), a flame-retardant layer (A), and a thermally functional layer (L) in the stated order, in which the flame-retardant layer (A) includes a layer containing a layered inorganic compound (f) in a polymer.
    Type: Application
    Filed: June 16, 2011
    Publication date: November 21, 2013
    Applicant: NITTO DENKO CORPORATION
    Inventors: Yusuke Sugino, Kunio Nagasaki, Kohei Doi, Takafumi Hida