Patents Assigned to Unitika Ltd.
  • Publication number: 20240282490
    Abstract: The present invention provides a soft magnetic nanowire having a sufficiently high saturation magnetization, a sufficiently high relative magnetic permeability and a sufficiently low coercivity force. The present invention relates to a soft magnetic nanowire, comprising an iron and a boron and having an average length of 5 ?m or more and an iron/boron molar ratio in the nanowire of less than 5, wherein the iron/boron molar ratio is measured by a SEM-EDS method.
    Type: Application
    Filed: August 24, 2022
    Publication date: August 22, 2024
    Applicant: UNITIKA LTD.
    Inventors: Hirotaka TAKEDA, Masumi MIYO, Naho TAKAHASHI
  • Patent number: 12048914
    Abstract: There is provided a deodorizing material having particularly high deodorization capabilities for ammonia, acetaldehyde, and toluene. The deodorizing material of the present invention comprises fibrous activated carbon; and (A) an aromatic amine and a sulfate of the aromatic amine or (B) an aromatic amine, a sulfate of the aromatic amine, and sulfuric acid, supported on the fibrous activated carbon, wherein a total substance amount of the aromatic amine and the sulfate of the aromatic amine supported per gram of the fibrous activated carbon is 0.85 to 1.
    Type: Grant
    Filed: March 30, 2018
    Date of Patent: July 30, 2024
    Assignee: UNITIKA LTD.
    Inventors: Masao Sunahara, Hiroki Fujiki
  • Patent number: 12012491
    Abstract: To provide a method for producing a polyamide resin film by using a polyamide resin obtained through polymerization of a regenerated monomer used as a recycled material. Provided is a method for producing a polyamide resin film, including: (1) a step of producing a monomer from a raw material (A) for depolymerization, (2) a step of producing a polyamide resin (B) through polymerization using a raw material containing the monomer. (3) a step of refining the polyamide resin (B), and (4) a step of producing an unstretched film using a starting material containing the refined polyamide resin (B), and stretching the unstretched film.
    Type: Grant
    Filed: January 22, 2021
    Date of Patent: June 18, 2024
    Assignee: UNITIKA LTD.
    Inventors: Akiko Kurosawa, Atsuko Noda
  • Patent number: 11965072
    Abstract: Provided is a semiaromatic polyamide fil having an average linear expansion coefficient in the width direction, measured under conditions of 20 to 125° C., of ?90 to 0 ppm/° C.
    Type: Grant
    Filed: March 25, 2022
    Date of Patent: April 23, 2024
    Assignee: UNITIKA LTD.
    Inventors: Yuki Aoyama, Takashi Okabe, Shuhei Yamane, Tomoko Yamanaka
  • Patent number: 11958806
    Abstract: An object is to provide a method for easily producing maleimide (MI) in which trace amounts of residual acid components as impurities in a crude MI are efficiently reduced, that is, the acid value is sufficiently reduced. <1> A method for producing purified MI, comprising reducing an acid value of crude MI by 50% or more, by adding carbodiimide (CDI) to a solution comprising the crude MI to react an acid component in the crude MI with the CDI. <2> The method for producing purified MI, comprising adding 0.5% by mass or more and 8% by mass or less of the CDI with respect to a mass of the crude MI for reaction. <3> The method for producing purified MI, wherein the CDI is N,N?-diisopropyl carbodiimide (DIC). <4> The method for producing purified MI, comprising removing a urea derivative of the CDI (CDI-U) by-produced when reacting the acid component in the crude MI with the CDI.
    Type: Grant
    Filed: September 29, 2020
    Date of Patent: April 16, 2024
    Assignee: UNITIKA LTD.
    Inventors: Yuki Yamada, Tatsuya Morikita, Yosuke Sugimoto, Takeshi Yoshida, Akira Shigeta, Yoshiaki Echigo
  • Patent number: 11932758
    Abstract: The present invention provides a polyarylate resin composition sufficiently excellent in heat resistance, transparency, heat discoloration resistance and moist heat resistance, and a molded article made of the same. The present invention relates to a polyarylate resin composition containing 0.005˜5 parts by mass of a silane compound (C) with a boiling point of 200° C. or more, based on 100 parts by mass of the total of a polyarylate resin (A) and a polycarbonate resin (B), a content ratio of the polyarylate resin (A) and the polycarbonate resin (B) being 5/95 to 95/5 (mass ratio).
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: March 19, 2024
    Assignee: UNITIKA LTD.
    Inventors: Toshiki Nagahata, Takatoshi Murakami
  • Publication number: 20240026151
    Abstract: The present invention provides a resin composition, from which a molded product excellent in a dust-generating resistance property, heat-resisting properties, a dimensional stability, sliding properties, mechanical properties and external appearance properties can be molded and which is excellent in a molding stability, and a molded product which is obtained by molding the same. The present invention relates to a resin composition comprising a polyarylate resin, a polycarbonate resin, silica particles having an average particle diameter of 0.4 to 12 ?m, fluorine atom-containing polymer particles having an average particle diameter of 0.5 to 20 ?m, and a particular phosphite ester compound, wherein a mass ratio of the polyarylate resin and the polycarbonate resin is 25/75 to 92/8, a content of the silica particles is 4 to 65 parts by mass with respect to 100 parts by mass of a total amount of the polyarylate resin and the polycarbonate resin, a content of the fluorine atom-containing polymer particles is 0.
    Type: Application
    Filed: October 12, 2020
    Publication date: January 25, 2024
    Applicant: UNITIKA LTD.
    Inventor: Yutaka NABESHIMA
  • Publication number: 20240018316
    Abstract: A polyester film includes a polyester (A) composed mainly of polybutylene terephthalate and a polyester (B) composed mainly of polyethylene terephthalate, wherein a mass ratio (A/B) between the polyesters (A) and (B) is 70/30 to 55/45, a dry heat shrinkage rate (B) through heat treatment at 200° C. for 15 minutes is 35% or less in any of four directions (0°, 45° 90° and 135°) on the film surface, a difference between a maximum value and a minimum value of these dry heat shrinkage rates is 5% or less, a thickness variation in the four directions is 10% or less, and a crystallization index shown in DSC measurement is 25 to 55 J/g.
    Type: Application
    Filed: March 8, 2021
    Publication date: January 18, 2024
    Applicant: UNITIKA LTD.
    Inventors: Hiroshi Ashihara, Takayoshi Okuzu, Ken Akamatsu, Akiko Kurosawa, Goro Araki, Akito Kajita
  • Patent number: 11873235
    Abstract: There is provided an activated carbon having a high total trihalomethane filtration capacity, even in water treatment by passing water at a high superficial velocity (SV). In the activated carbon of the present invention, a pore volume A of pores with a size of 1.0 nm or less, of pore volumes calculated by the QSDFT method, is 0.3 cc/g or more, and a pore volume B of pores with a size of 3.0 nm or more and 3.5 nm or less, of pore volumes calculated by the QSDFT method, is 0.009 cc/g or more.
    Type: Grant
    Filed: June 18, 2019
    Date of Patent: January 16, 2024
    Assignees: AD'ALL CO., LTD., UNITIKA LTD.
    Inventors: Tomoyasu Nakano, Hirokazu Shimizu, Akinori Kawachi, Keiji Sakai
  • Patent number: 11840477
    Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0<Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass composition provided includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O=Li2O+Na2O+K2O and RO=MgO+CaO+SrO.
    Type: Grant
    Filed: August 3, 2022
    Date of Patent: December 12, 2023
    Assignees: NIPPON SHEET GLASS COMPANY, LIMITED, UNITIKA LTD., UNITIKA GLASS FIBER CO., LTD.
    Inventors: Aya Nakamura, Hidetoshi Fukuchi, Junji Kurachi, Riku Sawai, Takaharu Miyazaki, Yoshito Nawa, Kohji Hattori
  • Publication number: 20230347409
    Abstract: The present invention provides a nickel nanowire, which is resistant to break by stress. The present invention relates to a nickel nanowire having a face-centered cubic lattice structure and a crystallite size in a direction of a (111) lattice plane of 10 nm or less.
    Type: Application
    Filed: May 17, 2021
    Publication date: November 2, 2023
    Applicant: UNITIKA LTD.
    Inventors: Hirotaka TAKEDA, Chikako YAMADA
  • Publication number: 20230347411
    Abstract: The present invention provides nickel a nanowire, which is able to form a structure such as non-woven fabric adequately excellent in high-temperature resistance properties and is adequately excellent in magnetic properties. The present invention relates to a nickel nanowire having a face-centered cubic lattice structure, a crystallite size in a direction of a (111) lattice plane of 15 nm or more and a saturation magnetization of 20 emu/g or more.
    Type: Application
    Filed: July 20, 2021
    Publication date: November 2, 2023
    Applicant: UNITIKA LTD.
    Inventors: Hirotaka TAKEDA, Chikako YAMADA
  • Publication number: 20230331987
    Abstract: The present invention provides a polyamide and a polyamide film which are more sufficiently superior in all of heat-resisting properties, flexibility properties and rubber elastic properties. The present invention relates to a polyamide comprising a unit comprised of an aliphatic dicarboxylic acid (A) having 18 or more carbon atoms, a unit comprised of an aliphatic diamine (B) having 18 or more carbon atoms, a unit comprised of an aromatic dicarboxylic acid (C) having 12 or less carbon atoms and a unit comprised of an aliphatic diamine (D) having 12 or less carbon atoms, wherein the polyamide has a melting point of 240° C. or more, a crystalline melting enthalpy of 20 J/g or more and an elongation recovery rate of 50% or more in a hysteresis test, and a polyamide film comprising the polyamide.
    Type: Application
    Filed: September 13, 2021
    Publication date: October 19, 2023
    Applicant: UNITIKA LTD.
    Inventors: Yusuke YAGI, Ami HIROTA, Makoto NAKAI, Takeshi MARUO, Naoki TAKAISHI
  • Patent number: 11773009
    Abstract: The present disclosure provides a novel glass composition that has a low permittivity and is suitable for mass production. A glass composition provided satisfies, in wt %, for example, 40?SiO2?60, 25?B2O3?45, 0<Al2O3?18, 0<R2O?5, and 0?RO?12, and satisfies at least one of: i) SiO2+B2O3?80 and SiO2+B2O3+Al2O3?99.9; and ii) SiO2+B2O3?78, SiO2+B2O3+Al2O3?99.9, and 0<RO<10. Another glass composition provided includes SiO2, B2O3, Al2O3, R2O, and 3<RO<8 at the same contents as the above, and satisfies SiO2+B2O3?75 and SiO2+B2O3+Al2O3<97, where R2O?Li2O+Na2O+K2O and RO?MgO+CaO+SrO.
    Type: Grant
    Filed: August 3, 2022
    Date of Patent: October 3, 2023
    Assignees: NIPPON SHEET GLASS COMPANY, LIMITED, UNITIKA LTD., UNITIKA GLASS FIBER CO., LTD.
    Inventors: Aya Nakamura, Hidetoshi Fukuchi, Junji Kurachi, Riku Sawai, Takaharu Miyazaki, Yoshito Nawa, Kohji Hattori
  • Patent number: 11753500
    Abstract: The present invention provides an epoxy resin solution, from which an epoxy resin-cured product adequately excellent in heat-resisting properties and dielectric properties can be obtained with adequately good working properties ensured. The present invention relates to an epoxy resin solution containing at least a curing agent and an epoxy resin mixed in an organic solvent, wherein the curing agent comprises an imide group-containing curing agent having 1-4 imide groups and 2-4 glycidyl group-reactive functional groups in a molecule.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: September 12, 2023
    Assignee: UNITIKA LTD.
    Inventors: Ayumi Yanaka, Yumeto Fukubayashi, Takatoshi Murakami
  • Publication number: 20230272176
    Abstract: The objective of the present invention is to provide a stretched polyamide film which is excellent in laminatability, lamination strength, mechanical properties and shock resistance property and which has effects to prevent goods being broken and protect a content from vibration and shock at the time of transportation when used a various packaging materials. The present invention relates to a stretched polyamide film, wherein a main constituent is nylon 6; at least one surface layer meets the following conditions (1) and (2); and the stretched polyamide film meets the following condition (3): (1) a relaxation degree of a surface layer orientation measured by IR spectroscopy is within a range of not less than 0.3 and not more than 0.5; (2) a crystallization degree of a surface layer measured by IR spectroscopy is within a range of not less than 1.0 and not more than 1.4; (3) a heat shrinkage rate (%) in TD direction at 160° C. for 10 minutes is within a range of not less than 0.6 and not more than 4.
    Type: Application
    Filed: November 16, 2021
    Publication date: August 31, 2023
    Applicant: UNITIKA LTD.
    Inventors: Takashi Okabe, Nobuyasu Okumura, Kumi Ashihara
  • Publication number: 20230257539
    Abstract: [Problem] To provide a method for producing a polyamide resin film by using a poi amide resin obtained through polymerization of a regenerated monomer used as a recycled material. [Solution] Provided is a method for producing a polyamide resin film, including: a step of producing a monomer from a raw material (A) for depolymerization, (2) a step of producing a polyamide resin (B) through polymerization using a raw material containing the monomer, (3) a step of refining the polyamide resin (B), and (4) a step of producing an unstretched film using a starting material containing the refined polyamide resin (B), and stretching the unstretched film.
    Type: Application
    Filed: April 28, 2023
    Publication date: August 17, 2023
    Applicant: UNITIKA LTD.
    Inventors: Akiko Kurosawa, Atsuko Noda
  • Publication number: 20230249985
    Abstract: The present invention is a water purifier cartridge to be attached to a container including a water storage portion having an opening at an upper portion thereof, and a lid that has an outlet for discharging water stored in the water storage portion and is configured to close the opening of the water storage portion, the cartridge including: a support including a circumferential wall portion formed in a cylindrical shape and a closing portion that closes one end portion in an axial direction of the circumferential wall portion and in which an air hole is formed, another end portion in the axial direction being open; and a filter member that is supported by the support so as to extend along the circumferential wall portion.
    Type: Application
    Filed: June 9, 2021
    Publication date: August 10, 2023
    Applicant: UNITIKA LTD.
    Inventor: Shinji TANIGUCHI
  • Publication number: 20230113079
    Abstract: To provide a biaxially stretched polyester resin film that has excellent properties equal to or better than those of biaxially stretched polyester film that does not use recycled raw material, and in particular that has an excellent flexural resistance in low-temperature environments. A biaxially stretched polyester resin film that characteristically satisfies both of the following properties (1) and (2): (1) in differential scanning calorimetry (DSC), after heating from 25° C. to 300° C. at a heating rate of 20° C./minute and holding for 10 minutes at 300° C., the temperature of crystallization during cooling at a cooling rate of 40° C./minute is 160° C. to 180° C.; and (2) the number of pinholes after the execution of 200 repetitive cycles of a flexural fatigue test in a ?10° C. atmosphere using a Gelbo Flex Tester is not more than 10/500 cm2.
    Type: Application
    Filed: March 26, 2021
    Publication date: April 13, 2023
    Applicants: UNITIKA LTD., NIPPON ESTER CO., LTD., UNITIKA TRADING CO., LTD.
    Inventors: Goro Araki, Hiroshi Ashihara, Hazumu Nagano
  • Publication number: 20230089078
    Abstract: A polyester resin comprises a dicarboxylic acid component and a glycol component, wherein the glycol component contains ethylene glycol together with diethylene glycol and triethylene glycol, and a content of triethylene glycol in the glycol component is more than 0.1 mol % and 5.5 mol % or less.
    Type: Application
    Filed: February 24, 2021
    Publication date: March 23, 2023
    Applicants: UNITIKA LTD., NIPPON ESTER CO., LTD.
    Inventors: Yumeto Fukubayashi, Yuta Tenma