Patents Assigned to Teijin Limited
  • Patent number: 11584091
    Abstract: Provided are a method of producing a metal member, a method of producing a resin member, and a method of producing an exterior part of a vehicle, each using a laminated body including a paint substitute film that includes a thermoplastic resin film, a colored layer, and a semi-cured hard coat layer, in this order, and a protective film that is bonded to a surface of the semi-cured hard coat layer. (1) The method of producing a metal member uses a steel plate together with the laminated body, and includes: a molding step of performing thermocompression bonding on the laminated body and the heated steel plate and performing press-molding while curing the semi-cured hard coat layer.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: February 21, 2023
    Assignee: TEIJIN LIMITED
    Inventor: Yoshitaka Tanaka
  • Publication number: 20230051676
    Abstract: An object of the present invention is to provide a novel production method of a poly(ester)carbonate. The present invention relates to a production method of a poly(ester)carbonate, including subjecting a diol and a carbonate ester to a transesterification reaction in the presence of a catalyst, wherein the catalyst comprises aluminum or a compound thereof, and a phosphorus compound.
    Type: Application
    Filed: November 1, 2022
    Publication date: February 16, 2023
    Applicant: TEIJIN LIMITED
    Inventors: Kazunori NUNOME, Manabu MATSUI, Takatsune YANAGIDA, Kazuyoshi OGASAWARA, Keisuke SATO, Kyosuke YAMADA, Tatsuya OYAMA
  • Patent number: 11578168
    Abstract: The purpose of the present invention is to provide a high temperature/humidity resistant polycarbonate resin without using bisphenol A as a raw material. The present invention relates to a polycarbonate resin comprising the repeating units of formulas (1), (2) and (3), wherein the content of the repeating unit of formula (3) is 5 mol% to 50 mol%, and the refractive index is 1.570 to 1.600. {In formula (1), R1 and R2 each represent a hydrogen atom or a C1-10 hydrocarbon group.} {In formula (3), n ranges from 0 to 8, and the R symbols are each selected from C1-3 alkyl groups}.
    Type: Grant
    Filed: March 20, 2019
    Date of Patent: February 14, 2023
    Assignee: TEIJIN LIMITED
    Inventors: Tatsuya Oyama, Kazuyoshi Ogasawara, Atsushi Umeki, Keisuke Sato, Manabu Matsui
  • Patent number: 11575082
    Abstract: A structure includes an oriented piezoelectric polymer arranged in a circular tubular or circular columnar shape, wherein the orientation angle of the piezoelectric polymer with respect to the central axis of the structure is 15° to 75°, the piezoelectric polymer includes a crystalline polymer having an absolute value of 0.1 to 1000 pC/N for the piezoelectric constant d14 when the orientation axis is the third axis, and the piezoelectric polymer includes a P-body containing a crystalline polymer with a positive piezoelectric constant d14 value and an N-body containing a crystalline polymer with a negative value, wherein for the portion of the central axis of the structure having a length of 1 cm, the value of T1/T2 is 0 to 0.8, T1 being the smaller and T2 being the larger of (ZP+SN) and (SP+ZN), where ZP, SP, ZN, and SN are particularly defined masses.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: February 7, 2023
    Assignees: TEIJIN LIMITED, KANSAI UNIVERSITY
    Inventors: Yoshiro Tajitsu, Shunsuke Kanematsu, Yuhei Ono
  • Patent number: 11566102
    Abstract: The purpose of the present invention is to provide a polyester resin or polyester carbonate resin, which has high refractive index, while achieving an excellent balance between heat resistance and low birefringence. A polyester resin or a polyester carbonate resin, which contains repeating units represented by the following formulae (1) and (2), and wherein the ratio of the repeating unit represented by formula (1) to the repeating unit represented by formula (2) is 15:85 to 85:15.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: January 31, 2023
    Assignee: TEIJIN LIMITED
    Inventors: Kyosuke Yamada, Manabu Matsui, Takatsune Yanagida, Kazuyoshi Ogasawara, Kazunori Nunome, Keisuke Sato, Tatsuya Oyama
  • Patent number: 11560646
    Abstract: An object of the present invention is to provide a carbon fiber which exhibits excellent strength development rate when used in a composite material. The present invention that solves the problems is a carbon fiber which simultaneously satisfies the following formulae (1) and (2): Lc/d?3??(1) TS×d×Lc>6.0×105??(2) wherein: Lc is an X-ray crystallite size (?), d is a filament diameter (?m), and TS is a strand tensile strength (MPa).
    Type: Grant
    Filed: November 22, 2018
    Date of Patent: January 24, 2023
    Assignees: TEIJIN LIMITED, Teijin Carbon Europe GmbH
    Inventors: Shuhei Yoshida, Hidekazu Yoshikawa, Yosuke Nakamura, Hironori Kawamoto, Takaya Suzuki, Toru Kaneko
  • Publication number: 20230017814
    Abstract: An object of the present invention is to provide a carbon fiber which exhibits excellent strength development rate when used in a composite material. The present invention that solves the problems is a carbon fiber which simultaneously satisfies the following formulae (1) and (2): Lc/d?3??(1) TS×d×Lc>6.0×105??(2) wherein: Lc is an X-ray crystallite size (?), d is a filament diameter (?m), and TS is a strand tensile strength (MPa).
    Type: Application
    Filed: September 13, 2022
    Publication date: January 19, 2023
    Applicants: Teijin Limited, Teijin Carbon Europe GmbH
    Inventors: Shuhei YOSHIDA, Hidekazu Yoshikawa, Yosuke Nakamura, Hironori Kawamoto, Takaya Suzuki, Toru Kaneko
  • Publication number: 20230006341
    Abstract: Provided is a conductive film for antennas, in which a conducting film and a substrate made of a polycarbonate resin material containing a polycarbonate resin are laminated, and the polycarbonate resin contains, as main constituent units, a unit (A) represented by the following formula (1) and/or a unit (B) represented by the following formula (2). The conductive film for antennas has low dielectric characteristics and bendability, can form an antenna with a low transmission loss, and has excellent adhesion to the conducting film. (In the formula (1), R1 and R2 each independently represent an alkyl group having 1 to 6 carbon atoms or a halogen atom, and R3 and R4 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a halogen atom.
    Type: Application
    Filed: October 6, 2020
    Publication date: January 5, 2023
    Applicant: TEIJIN LIMITED
    Inventors: Hideyuki TSUNEMORI, Hiroshi OKAMOTO, Tomoya NAKANISHI
  • Patent number: 11545669
    Abstract: The purpose of the present invention is to provide an electrode active material layer exhibiting excellent mechanical strength. This electrode material for a non-aqueous electrolyte secondary battery includes at least an electrode active material, a carbon-based conductive auxiliary agent, and a binder. The carbon-based conductive auxiliary agent has a linear structure, and includes ultra-fine fibrous carbon having an average fibre diameter of more than 200 nm but not more than 900 nm. The electrode material configures an electrode active material layer in which the maximum tensile strength (?M) in a planar direction and the tensile strength (?T) in an in-plane direction orthogonal to the maximum tensile strength (?M) satisfy relational expression (a), namely ?M/?T?1.6.
    Type: Grant
    Filed: November 26, 2019
    Date of Patent: January 3, 2023
    Assignee: TEIJIN LIMITED
    Inventors: Kazuki Yachi, Shinya Komura, Asami Kanematsu, Takahiro Daido
  • Publication number: 20220408864
    Abstract: The invention addresses the problem of providing a cloth and a protective product, which are excellent not only in flame retardancy but also in protection performance against electric arcs, and can further be provided with any color appearance. As a means for resolution, in a cloth including a flame-retardant fiber, a UV absorber or carbon particles are contained in the cloth, and the cloth is configured to have a lightness index L-value of 25 or more.
    Type: Application
    Filed: October 20, 2020
    Publication date: December 29, 2022
    Applicant: TEIJIN LIMITED
    Inventor: Kengo TANAKA
  • Publication number: 20220410443
    Abstract: Problems of high impact resistance and “warpage” of a molded body are solved by a method for producing a molded body, including: using a mold MA and a mold MB, which are a pair of male and female molds, to compression-mold a material A and a material B in contact with the mold MA and the mold MB, respectively, in which the material A contains a carbon fiber and a thermoplastic resin M1, and the material B contains a glass fiber and a thermoplastic resin M2, the molded body includes a pair of side walls and a connecting wall that is connected to the side walls, the molded body has a wave shape in cross section, and a relationship between a flatness Fa of the molded body and a height h of the side wall satisfies 0?Fa/h<1.3.
    Type: Application
    Filed: October 13, 2021
    Publication date: December 29, 2022
    Applicant: Teijin Limited
    Inventors: Daishiro Nakamoto, Daisuke Noto, Yuhei Konagai, Ichiro Kitano
  • Patent number: 11535979
    Abstract: Provided is a fiber material for cement reinforcement, configured such that a resin A containing an isocyanate compound as a constituent component is present inside a fiber bundled body, and a resin B containing an epoxy resin as a constituent component is present on a surface of the fiber bundled body. Further, it is preferable that the resin A contains a polyol or an epoxy compound as a constituent component in addition to the isocyanate compound, the resin B contains an acrylic-modified epoxy resin or a bisphenol-A epoxy resin as a main component, the fiber bundled body has a tensile strength of 7 cN/dtex or more, and the fiber bundled body includes 50 to 3,000 single fibers. The invention is also addressed to a concrete or mortar molded article using the above fiber material for reinforcement.
    Type: Grant
    Filed: September 17, 2020
    Date of Patent: December 27, 2022
    Assignee: TEIJIN LIMITED
    Inventors: Shuhei Okamura, Shintaro Shimada, Akira Teraoka, Takeya Dei
  • Patent number: 11532822
    Abstract: The present invention provides: a fibrous carbon characterized in that the average effective fiber length is 1-100 ?m, and the crystallite length (La) measured using X-ray diffraction is 100-500 nm; an electrode mixture layer for a non-aqueous-electrolyte secondary cell, said mixture comprising an electrode active material and a carbon-based electroconductive auxiliary agent containing said fibrous carbon; an electrode for a non-aqueous-electrolyte secondary cell, the electrode comprising a collector and said electrode mixture layer for a non-aqueous-electrolyte secondary cell, the electrode mixture layer being laminated on the collector; and a non-aqueous-electrolyte secondary cell having said electrode for a non-aqueous-electrolyte secondary cell.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: December 20, 2022
    Assignee: TEIJIN LIMITED
    Inventors: Shinya Komura, Ryota Hirakawa, Kazuki Yachi, Asami Kanematsu, Takahiro Daido
  • Publication number: 20220396065
    Abstract: An object of the present invention is to provide a heat dissipation sheet having high thermal conductivity in the thickness direction. The present invention provides a heat dissipation sheet having a structure in which at least two thermally conductive insulation layers are laminated, wherein the lamination direction of the thermally conductive insulation layers is substantially perpendicular to the thickness direction of the heat dissipation sheet, and wherein for the entire cross-section perpendicular to the in-plane direction of the heat dissipation sheet, the thermally conductive insulation layer contains 75 to 97% by area of insulating particles, 3 to 25% by area of a binder resin, and 10% by area or less of voids.
    Type: Application
    Filed: November 6, 2020
    Publication date: December 15, 2022
    Applicant: TEIJIN LIMITED
    Inventors: Masanori MAEDA, Yoshinori IKEDA, Masayuki CHOKAI, Takuya MURAKAMI
  • Publication number: 20220393282
    Abstract: A battery box component is detailed which is obtained by providing a fiber-reinforced plastic with a refractory layer, the fiber-reinforced plastic is a thermosetting resin as a matrix resin, containing reinforcing fibers, wherein: the reinforcing fibers are discontinuous reinforcing fibers having a weight average fiber length of from 1 mm to 100 mm; the thermosetting resin is composed of at least one resin of an unsaturated polyester resin, a vinyl ester resin, or an epoxy resin; the thickness X of the fiber-reinforced plastic is not less than 1.0 mm but less than 5 mm; and the refractory layer contains an acrylic resin or a urethane resin and a foaming composition. A method for producing a battery box component is also provided.
    Type: Application
    Filed: April 16, 2021
    Publication date: December 8, 2022
    Applicant: Teijin Limited
    Inventors: Masanobu Wakita, Masatomo Teshima, Hiroyuki Shimizu, Shunsuke Tamura, Takuya Mounai
  • Publication number: 20220380939
    Abstract: A process for manufacturing a fiber including meta-aramid having a breaking tenacity of at least 300 mN/tex including the steps of preparing a spin dope including meta-aramid and sulfuric acid having a concentration of at least 80 wt % and passing the spin dope through a spinneret into a coagulation bath, wherein the spin dope has a meta-aramid concentration of at least 10 wt %. The invention also pertains to a meta-aramid fiber, a multifilament yarn, a textile sheet and protective clothing.
    Type: Application
    Filed: October 6, 2020
    Publication date: December 1, 2022
    Applicant: TEIJIN LIMITED
    Inventors: Hanneke BOERSTOEL, Wido NIJENHUIS, Rasid GÜNES, Said BOUDEBAH, Yorihisa YAMAGUCHI, Yusuke SATOH
  • Patent number: 11510768
    Abstract: The present invention provides a warp-knitted fabric and a medical material that can be simultaneously extended in all directions by causing thread made of a second bioabsorbable material to be absorbed in a living body over time and in which the degree of extension can be increased.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: November 29, 2022
    Assignees: EDUCATIONAL FOUNDATION OF OSAKA MEDICAL AND PHARMACEUTICAL UNIVERSITY, TEIJIN LIMITED
    Inventors: Shintaro Nemoto, Hideaki Yamada, Jun Sakurai, Kazuteru Kohno, Masaya Ito, Atsuko Onishi
  • Patent number: 11505698
    Abstract: The present invention relates to a production method of a poly(ester)carbonate, including subjecting a diol and a carbonate ester to a transesterification reaction in the presence of a catalyst, wherein the catalyst comprises aluminum or a compound thereof, and a phosphorus compound.
    Type: Grant
    Filed: December 27, 2018
    Date of Patent: November 22, 2022
    Assignee: TEIJIN LIMITED
    Inventors: Kazunori Nunome, Manabu Matsui, Takatsune Yanagida, Kazuyoshi Ogasawara, Keisuke Sato, Kyosuke Yamada, Tatsuya Oyama
  • Publication number: 20220359881
    Abstract: The present invention provides an active material layer for an all-solid-state lithium secondary battery including at least an active material, a conductive aid, and a solid electrolyte, in which the active material layer has a gap, a ratio of the conductive aid in the active material layer is 0.1% by mass or more and less than 5.0% by mass, the conductive aid contains fibrous carbon having an average fiber diameter of 10 to 900 nm, and a ratio of the fibrous carbon in the conductive aid is 20% by mass or more.
    Type: Application
    Filed: June 26, 2020
    Publication date: November 10, 2022
    Applicant: Teijin Limited
    Inventors: Kazuki YACHI, Shinya KOMURA, Takahiro DAIDO
  • Publication number: 20220332939
    Abstract: The present invention provides an epoxy resin composition containing: an epoxy resin [A] that is a compound represented by Chemical formula (1) shown below: wherein R1 to R4 each independently represent one selected from the group consisting of a hydrogen atom, an aliphatic hydrocarbon group, an alicyclic hydrocarbon group, and a halogen atom, and X represents one selected from —CH2—, —O—, —S—, —CO—, —C(?O)O—, —O—C(?O)—, —NHCO—, —CONH—, and —SO2—; a bifunctional epoxy resin [B] having an amine type glycidyl group; a curing agent [C] containing an aromatic polyamine, and having at least one substituent selected from an aliphatic substituent, an aromatic substituent, and a halogen atom at an ortho position with respect to an amino group; and a particulate rubber component [D].
    Type: Application
    Filed: September 12, 2019
    Publication date: October 20, 2022
    Applicant: TEIJIN LIMITED
    Inventors: Suguru OZAWA, Toru KANEKO, Kohei OSAKI