Patents by Inventor Yosuke Washitake

Yosuke Washitake 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).

  • Patent number: 11370195
    Abstract: Provided is a multilayer composite that has flame retardancy and low smoking property as well as has high physical characteristics. The multilayer composite has a multilayer structure and includes at least one core layer and at least one skin layer, wherein the multilayer composite satisfies all the following conditions (A) to (D): (A) the core layer is a composite including discontinuous reinforcing fibers and a first thermoplastic resin, in which the discontinuous reinforcing fibers are randomly dispersed and bonded with the first thermoplastic resin at least at intersections of the discontinuous reinforcing fibers; (B) the skin layer is a composite including continuous reinforcing fibers and a second thermoplastic resin, in which the continuous reinforcing fibers are impregnated with the second thermoplastic resin; (C) each of the first and the second thermoplastic resins has a limiting oxygen index of 30 or higher; and (D) the first and the second thermoplastic resins are miscible with each other.
    Type: Grant
    Filed: October 23, 2019
    Date of Patent: June 28, 2022
    Assignee: KURARAY CO., LTD.
    Inventors: Satoshi Katsuya, Yosuke Washitake, Ryokei Endo
  • Publication number: 20220033595
    Abstract: A method may produce a heat-resistant resin composite excellent in heat resistance and bending properties. This heat-resistant resin composite is constituted of a matrix resin and reinforcing fibers dispersed in the matrix resin. The matrix resin is constituted of a heat-resistant thermoplastic polymer having a glass transition temperature of 100° C. or higher, and a polyester-based polymer comprising a terephthalic acid unit (A) and an isophthalic acid unit (B) at a copolymerization proportion (molar ratio) of (A)/(B)=100/0 to 40/60. The proportion of the heat-resistant thermoplastic polymer in the composite is 30 to 80 wt %.
    Type: Application
    Filed: October 15, 2021
    Publication date: February 3, 2022
    Applicant: KURARAY CO., LTD.
    Inventors: Ryokei ENDO, Yosuke WASHITAKE
  • Publication number: 20210394406
    Abstract: Provided are a space filling material and a space filling structure capable of filling a predetermined space for various purposes, and method for using those. A space filling material (11) includes reinforcing fibers as an expansion material and a resin. The reinforcing fibers form a plurality of intersections and are bonded with the resin at at least one of the intersections. Heating of the space filling material causes an expansion stress in at least a thickness direction (X) such that the space filling material fills a predetermined space (13). For example, the space filling material may contain the resin at a volume ratio of 15 to 95 vol % based on a total volume of the reinforcing fibers and the resin.
    Type: Application
    Filed: September 2, 2021
    Publication date: December 23, 2021
    Applicant: KURARAY CO., LTD.
    Inventors: Satoshi KATSUYA, Ryokei ENDO, Yosuke WASHITAKE, Shunsuke SUIKO
  • Publication number: 20210382228
    Abstract: A light-emitting fiber includes a core and a cladding and is configured to emit light through a side surface of the fiber. A resin used for the core is at least one selected from the group consisting of polymethyl methacrylate, polymethyl methacrylate copolymers, polystyrene, polycarbonates, polyorganosiloxanes, and norbornene, and a resin used for the cladding is fluorine resin. The light-emitting fiber has a fiber diameter of 95 ?m or less.
    Type: Application
    Filed: October 23, 2019
    Publication date: December 9, 2021
    Applicant: KURARAY CO., LTD.
    Inventors: Takeshi TSUDAKA, Yosuke WASHITAKE, Ryokei ENDO, Shunsuke SUIKO
  • Publication number: 20210292933
    Abstract: Polyvinyl alcohol-based fibers contain a polyvinyl alcohol-based polymer and an adsorbent. With respect to 100 parts by mass of the polyvinyl alcohol-based polymer, 30 to 500 parts by mass of the adsorbent is contained. The polyvinyl alcohol-based fibers have a crystallinity of polyvinyl alcohol ranging from 30% to 60%, a diameter ranging from 5 ?m to 1000 ?m, and a specific surface area ranging from 10 m2/g to 2000 m2/g.
    Type: Application
    Filed: October 25, 2019
    Publication date: September 23, 2021
    Applicant: KURARAY CO., LTD.
    Inventors: Yoshimi NONAKA, Yosuke WASHITAKE, Shinji SEKIYA, Ryokei ENDO
  • Publication number: 20210283805
    Abstract: Disclosed is a fiber-reinforced resin composite body (1) including: a thermosetting resin (2); a plurality of reinforcing fiber layers (4) stacked in the thermosetting resin (2); and a thermoplastic resin (5) dispersed in a form of particles in the thermosetting resin (2) between the plurality of reinforcing fiber layers (4).
    Type: Application
    Filed: June 26, 2019
    Publication date: September 16, 2021
    Applicant: KURARAY CO., LTD.
    Inventors: Satoshi KATSUYA, Yosuke WASHITAKE, Ryokei ENDO
  • Publication number: 20210002791
    Abstract: Provided is a semi-aromatic polyamide fiber having excellent spinning stability, heat resistance and chemical resistance. The semi-aromatic polyamide fiber includes a semi-aromatic polyamide resin having a melting point of 290° C. or higher and a plasticizer having a 5% thermal weight reduction temperature of 320° C. or higher, the resin having as a dicarboxylic acid component an aromatic dicarboxylic acid unit and as a diamine component 1,9-nonanediamine unit and 2-methyl-1,8-octanediamine unit in a molar ratio (the former:the latter) of 70:30 to 99:1.
    Type: Application
    Filed: September 17, 2020
    Publication date: January 7, 2021
    Applicant: KURARAY CO., LTD.
    Inventors: Takeshi TSUDAKA, Shohei TSUNOFURI, Yosuke WASHITAKE
  • Publication number: 20200277456
    Abstract: Provided is an expansive refractory material that not only has excellent fire resistance but also can provide a heat insulating function for protecting a content by expanding to form a heat insulating layer when the refractory material is brought close to a heat source or comes into contact with flame. The refractory material at least includes: discontinuous reinforcing fibers having a thermal conductivity of 4 W/(m·K) or higher; and a flame-retardant thermoplastic resin, wherein the discontinuous reinforcing fibers are dispersed in the refractory material. The refractory material has a post-expansion porosity of 30% or higher.
    Type: Application
    Filed: May 19, 2020
    Publication date: September 3, 2020
    Applicant: KURARAY CO ., LTD.
    Inventors: Satoshi KATSUYA, Yosuke Washitake, Ryokei Endo, Shunsuke Suiko
  • Publication number: 20200224345
    Abstract: The purpose of the present invention is to provide a liquid permeable body comprising a porous composite that has different liquid permeabilities between in the in-plane direction and in the out-of-plane direction as well as excellent mechanical properties. The liquid permeable body comprises a porous composite having a structure in which discontinuous reinforcing fibers are dispersed; the dispersed discontinuous reinforcing fibers are bonded with a thermoplastic resin at at least an intersection thereof; voids of continuous openings form a void content of from 30 to 90%; an average value ? of fiber orientation angles is from 0 to 40° in an in-plane direction of the discontinuous reinforcing fibers; and an average value ? of fiber orientation angles is from 0 to 25° in an out-of-plane direction of the discontinuous reinforcing fibers.
    Type: Application
    Filed: March 19, 2020
    Publication date: July 16, 2020
    Applicant: Kuraray Co., Ltd
    Inventors: Satoshi KATSUYA, Yosuke WASHITAKE, Ryokei ENDO
  • Publication number: 20200199786
    Abstract: Fibers based on poly(vinyl alcohol) is composed of a poly(vinyl alcohol) polymer and a phyllosilicate. The fibers contain 30 to 400 parts by mass of the phyllosilicate per 100 parts by mass of the poly(vinyl alcohol) polymer. The fibers have a swelling degree of 200 to 600%.
    Type: Application
    Filed: August 29, 2018
    Publication date: June 25, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Yoshimi NONAKA, Hiroyuki ZUSHI, Yosuke WASHITAKE, Ryokei ENDO
  • Publication number: 20200055276
    Abstract: Provided is a multilayer composite that has flame retardancy and low smoking property as well as has high physical characteristics. The multilayer composite has a multilayer structure and includes at least one core layer and at least one skin layer, wherein the multilayer composite satisfies all the following conditions (A) to (D): (A) the core layer is a composite including discontinuous reinforcing fibers and a first thermoplastic resin, in which the discontinuous reinforcing fibers are randomly dispersed and bonded with the first thermoplastic resin at least at intersections of the discontinuous reinforcing fibers; (B) the skin layer is a composite including continuous reinforcing fibers and a second thermoplastic resin, in which the continuous reinforcing fibers are impregnated with the second thermoplastic resin; (C) each of the first and the second thermoplastic resins has a limiting oxygen index of 30 or higher; and (D) the first and the second thermoplastic resins are miscible with each other.
    Type: Application
    Filed: October 23, 2019
    Publication date: February 20, 2020
    Applicant: KURARAY CO., LTD.
    Inventors: Satoshi Katsuya, Yosuke Washitake, Ryokei Endo
  • Publication number: 20190329525
    Abstract: A sound-absorbing thermal-insulating material (1) includes flame resistant organic fibers (2) and inorganic fibers (4) bonded to the flame resistant organic fibers (2). The flame resistant organic fibers (2) shrink and the inorganic fibers (4) are distorted, so that the flame resistant organic fibers (2) and the inorganic fibers (4) are entangled with one another and distend.
    Type: Application
    Filed: November 17, 2017
    Publication date: October 31, 2019
    Applicants: KURARAY CO., LTD., TSUCHIYA CO., LTD.
    Inventors: Yoshimi NONAKA, Yosuke WASHITAKE, Ryokei ENDO, Takeshi FUJIWARA, Ryusuke TOMITA
  • Publication number: 20190161893
    Abstract: Provided is a flame-retardant fabric having a color that satisfies the criteria required by the international standard for high visibility ISO20471. The fabric includes polyetherimide-based fibers that contain a white pigment.
    Type: Application
    Filed: January 31, 2019
    Publication date: May 30, 2019
    Applicant: KURARAY CO., LTD.
    Inventors: Shohei Tsunofuri, Ryokei Endo, Yosuke Washitake, Takayuki Ikeda
  • Patent number: 9809905
    Abstract: Provided are an amorphous polyetherimide fiber having not only a small single fiber fineness suitable for producing fabrics, and a fabric comprising the amorphous polyetherimide fiber. The fiber comprises an amorphous polyetherimide polymer having a molecular weight distribution (Mw/Mn) of less than 2.5, and having a shrinkage percentage under dry heat at 200° C. of 5% or less, and a single fiber fineness of 3.0 dtex or less. The fiber may have a tenacity at room temperature of 2.0 cN/dtex or greater.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: November 7, 2017
    Assignee: KURARAY CO., LTD.
    Inventors: Ryokei Endo, Yosuke Washitake, Yukie Hashimoto, Akihiro Uehata
  • Patent number: 9518341
    Abstract: Provided are an amorphous polyetherimide fiber having not only a small single fiber fineness suitable for producing fabrics, and a fabric comprising the amorphous polyetherimide fiber. The fiber comprises an amorphous polyetherimide polymer having a molecular weight distribution (Mw/Mn) of less than 2.5, and having a shrinkage percentage under dry heat at 200° C. of 5% or less, and a single fiber fineness of 3.0 dtex or less. The fiber may have a tenacity at room temperature of 2.0 cN/dtex or greater.
    Type: Grant
    Filed: November 12, 2014
    Date of Patent: December 13, 2016
    Assignee: KURARAY CO., LTD.
    Inventors: Ryokei Endo, Yosuke Washitake, Yukie Sugihara, Akihiro Uehata
  • Patent number: 9422643
    Abstract: Provided are a heat-fusible fiber having excellent heat resistance, flame retardancy and dimensional stability; a fiber structure comprising the heat-fusible fiber; and a molded article produced by applying a heat fusion treatment to the fiber structure and having excellent heat resistance. The heat-fusible fiber comprises an amorphous PES type polymer (A) not substantially having a melting point and an amorphous PEI type polymer (B) in the mixture ratio (weight) of (A)/(B)=5/95 to 95/5, the fiber having a single glass transition temperature in the range between 80° C. and 200° C., and being amorphous. The fiber structure comprises 10% by weight or higher of the amorphous heat-fusible fiber. The molded article comprises at least a fiber structure comprising 10% by weight or higher of the amorphous heat-fusible fiber, to be fusion-bonded at a temperature higher than the glass transition temperature of the amorphous heat-fusible fiber.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: August 23, 2016
    Assignee: KURARAY CO., LTD.
    Inventors: Ryokei Endo, Yosuke Washitake, Jun Aramaki
  • Publication number: 20150167199
    Abstract: Provided are a heat-fusible fiber having excellent heat resistance, flame retardancy and dimensional stability; a fiber structure comprising the heat-fusible fiber; and a molded article produced by applying a heat fusion treatment to the fiber structure and having excellent heat resistance. The heat-fusible fiber comprises an amorphous PES type polymer (A) not substantially having a melting point and an amorphous PEI type polymer (B) in the mixture ratio (weight) of (A)/(B)=5/95 to 95/5, the fiber having a single glass transition temperature in the range between 80° C. and 200° C., and being amorphous. The fiber structure comprises 10% by weight or higher of the amorphous heat-fusible fiber. The molded article comprises at least a fiber structure comprising 10% by weight or higher of the amorphous heat-fusible fiber, to be fusion-bonded at a temperature higher than the glass transition temperature of the amorphous heat-fusible fiber.
    Type: Application
    Filed: February 27, 2015
    Publication date: June 18, 2015
    Applicant: KURARAY CO., LTD.
    Inventors: Ryokei ENDO, Yosuke WASHITAKE, Jun ARAMAKI
  • Publication number: 20150140306
    Abstract: Provided is a heat-resistant resin composite excellent in heat resistance and bending properties. This heat-resistant resin composite is constituted of a matrix resin and reinforcing fibers dispersed in the matrix resin. The matrix resin is constituted of a heat-resistant thermoplastic polymer having a glass transition temperature of 100° C. or higher, and a polyester-based polymer comprising a terephthalic acid unit (A) and an isophthalic acid unit (B) at a copolymerization proportion (molar ratio) of (A)/(B)=100/0 to 40/60. The proportion of the heat-resistant thermoplastic polymer in the composite is 30 to 80 wt %.
    Type: Application
    Filed: January 27, 2015
    Publication date: May 21, 2015
    Applicant: KURARAY CO., LTD.
    Inventors: Ryokei ENDO, Yosuke WASHITAKE
  • Publication number: 20150069654
    Abstract: Provided are an amorphous polyetherimide fiber having not only a small single fiber fineness suitable for producing fabrics, and a fabric comprising the amorphous polyetherimide fiber. The fiber comprises an amorphous polyetherimide polymer having a molecular weight distribution (Mw/Mn) of less than 2.5, and having a shrinkage percentage under dry heat at 200° C. of 5% or less, and a single fiber fineness of 3.0 dtex or less. The fiber may have a tenacity at room temperature of 2.0 cN/dtex or greater.
    Type: Application
    Filed: November 12, 2014
    Publication date: March 12, 2015
    Applicant: KURARAY CO., LTD.
    Inventors: Ryokei Endo, Yosuke Washitake, Yukie Sugihara, Akihiro Uehata
  • Publication number: 20130123437
    Abstract: Provided are a heat-fusible fiber having excellent heat resistance, flame retardancy and dimensional stability; a fiber structure comprising the heat-fusible fiber; and a molded article produced by applying a heat fusion treatment to the fiber structure and having excellent heat resistance. The heat-fusible fiber comprises an amorphous PES type polymer (A) not substantially having a melting point and an amorphous PEI type polymer (B) in the mixture ratio (weight) of (A)/(B)=5/95 to 95/5, the fiber having a single glass transition temperature in the range between 80° C. and 200° C., and being amorphous. The fiber structure comprises 10% by weight or higher of the amorphous heat-fusible fiber. The molded article comprises at least a fiber structure comprising 10% by weight or higher of the amorphous heat-fusible fiber, to be fusion-bonded at a temperature higher than the glass transition temperature of the amorphous heat-fusible fiber.
    Type: Application
    Filed: July 19, 2011
    Publication date: May 16, 2013
    Applicant: Kuraray Co., Ltd.
    Inventors: Ryokei Endo, Yosuke Washitake, Jun Aramaki