Patents by Inventor Yoshitaka Ayuzawa

Yoshitaka Ayuzawa 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: 20220289931
    Abstract: The present invention is a thermoplastic polyester resin composition which in a composition including an inorganic-reinforcing material such as glass fiber, maintains a good surface appearance while having high strength and high stiffness, has little warpage deformation, and generates very little burr; and an inorganic-reinforced thermoplastic polyester resin composition comprising 20 to 60% by mass of a polybutylene terephthalate resin (A), 5 to 20% by mass of an amorphous resin (B), 30 to 60% by mass of an inorganic-reinforcing material (C), 0.5 to 10% by mass of an ethylene-glycidyl (meth)acrylate copolymer (D), and 0.05 to 2% by mass of a transesterification inhibitor (E), wherein the composition has a melt viscosity of no less than 0.5 kPa·s and no more than 1.5 kPa·s at 265° C. and a shear rate of 10 sec?1.
    Type: Application
    Filed: September 2, 2020
    Publication date: September 15, 2022
    Applicant: TOYOBO CO., LTD.
    Inventors: Yoshitaka AYUZAWA, Takahiro SHIMIZU, Satoru HORIGUCHI
  • Publication number: 20220267597
    Abstract: A polyamide resin composition containing a polyimide resin (A), a modified styrene-based copolymer (B), a modified high-density polyethylene (C), and an aliphatic metal salt (D), and having a melt mass flow rate (MFR) of 20 g/10 minutes or more and less than 60 g/10 minutes and a 65% RH equilibrium water absorption rate of less than 3%. The polyamide resin composition can form a molded article having a sufficiently high limit of fatigue against continuous load, achieve high mechanical characteristics and high fluidity to prevent the occurrence of a short shot or decrease in the strength of a welded part even in a large and/or thick molded article, and has excellent mold releasability and more excellent abrasion resistance than ever before.
    Type: Application
    Filed: September 9, 2020
    Publication date: August 25, 2022
    Applicant: TOYOBO CO., LTD.
    Inventors: Yoshitaka AYUZAWA, Kensaku MAEDA, Ryo UMEKI
  • Publication number: 20220250282
    Abstract: A pellet production method comprising: an operation in which a strand comprising a composition containing thermoplastic resin and reinforcing material is extruded from an orifice at a die; an operation in which the strand is drawn into water within a tank and is cooled; and an operation in which the cooled strand is cut to obtain a pellet; wherein at least one first guide roller for guiding the strand within the tank is provided within the tank, and an angle made by portions of the strand that are ahead of and behind that first guide roller which is in an upstreammost location is not less than 90° but is less than 180°; and wherein a ratio of a diameter of the pellet to a diameter of the orifice (diameter of the pellet/diameter of the orifice) is 0.45 to 0.80.
    Type: Application
    Filed: June 2, 2020
    Publication date: August 11, 2022
    Applicant: TOYOBO CO., LTD.
    Inventors: Ryo UMEKI, Yoshitaka AYUZAWA
  • Publication number: 20220195185
    Abstract: The present invention is a polyamide resin composition which contains 50 to 90% by mass of a crystalline polyamide resin (A) and 9 to 49% by mass of a talc (B). The average particle size of secondary particles of the talc (B) in the polyamide resin composition is 30 ?m or less. The polyamide resin composition has an exothermic peak present on a high temperature side of a maximum exothermic peak of a crystallization temperature during cooling in a cooling process of measurement by means of a differential scanning calorimeter. Variations in physical characteristics such as a molding shrinkage, mechanical characteristics, and a heat distortion temperature of the polyamide resin composition are suppressed among different production machines or different production lots. Consequently, characteristics within desired ranges are stably obtained.
    Type: Application
    Filed: March 12, 2020
    Publication date: June 23, 2022
    Applicant: TOYOBO CO., LTD.
    Inventors: Hideo ASO, Shuji KUBOTA, Yoshitaka AYUZAWA
  • Publication number: 20220162381
    Abstract: The present invention is a polyamide resin composition containing 50 to 90% by mass of a crystalline polyamide resin (A) and 9 to 49% by mass of a talc (B), and preferably further containing a coupling agent (C) and a fatty acid metal salt (D), in which an average particle size of secondary particles of the talc (B) in the polyamide resin composition is greater than 30 ?m. The polyamide resin composition is less likely to cause a poor appearance of a molded article or occurrence of sink marks, and can stably provide characteristics within desired ranges.
    Type: Application
    Filed: March 12, 2020
    Publication date: May 26, 2022
    Applicant: TOYOBO CO., LTD.
    Inventors: Hideo ASO, Shuji KUBOTA, Yoshitaka AYUZAWA
  • Patent number: 9614212
    Abstract: A method produces a composite porous membrane including a porous membrane A formed of a polyolefin-based resin; and a porous membrane B containing a heat-resistant resin and laminated on the porous membrane A, including: (i) applying a heat-resistant resin solution onto a base film, followed by passing the coated film through a low-humidity zone, and then through a high-humidity zone to form a heat-resistant resin membrane on the base film; and (ii) bonding together the heat-resistant resin membrane formed in step (i) and a porous membrane A formed of a polyolefin-based resin, followed by converting the heat-resistant resin membrane into a porous membrane B by immersion in a solidification bath, and washing and drying the same to obtain the composite porous membrane.
    Type: Grant
    Filed: January 14, 2015
    Date of Patent: April 4, 2017
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Naoki Mizuno, Michihiko Irie, Yoshitaka Ayuzawa, Masanori Nakamura
  • Patent number: 9337461
    Abstract: A composite porous membrane is a composite porous membrane, wherein a porous membrane B including a heat-resistant resin is laminated on the surface of a polypropylene resin of an outermost layer of a porous membrane A composed of at least one layer, wherein at least one of the outermost layers comprises the polypropylene resin. The composite porous membrane satisfies a particular range of peeling strength at the interface between the porous membrane A and the porous membrane B and a particular range of difference between air resistance of the whole composite porous membrane and air resistance of the porous membrane A, provided that the porous membrane A satisfies a particular range of average pore size and porosity.
    Type: Grant
    Filed: August 29, 2011
    Date of Patent: May 10, 2016
    Assignee: Toray Battery Separator Film Co., Ltd.
    Inventors: Naoki Mizuno, Michihiko Irie, Yoshitaka Ayuzawa, Masanori Nakamura
  • Publication number: 20150122400
    Abstract: A method produces a composite porous membrane including a porous membrane A formed of a polyolefin-based resin; and a porous membrane B containing a heat-resistant resin and laminated on the porous membrane A, including: (i) applying a heat-resistant resin solution onto a base film, followed by passing the coated film through a low-humidity zone, and then through a high-humidity zone to form a heat-resistant resin membrane on the base film; and (ii) bonding together the heat-resistant resin membrane formed in step (i) and a porous membrane A formed of a polyolefin-based resin, followed by converting the heat-resistant resin membrane into a porous membrane B by immersion in a solidification bath, and washing and drying the same to obtain the composite porous membrane.
    Type: Application
    Filed: January 14, 2015
    Publication date: May 7, 2015
    Inventors: Naoki Mizuno, Michihiko Irie, Yoshitaka Ayuzawa, Masanori Nakamura
  • Publication number: 20130330592
    Abstract: A composite porous membrane is a composite porous membrane, wherein a porous membrane B including a heat-resistant resin is laminated on the surface of a polypropylene resin of an outermost layer of a porous membrane A composed of at least one layer, wherein at least one of the outermost layers comprises the polypropylene resin. The composite porous membrane satisfies a particular range of peeling strength at the interface between the porous membrane A and the porous membrane B and a particular range of difference between air resistance of the whole composite porous membrane and air resistance of the porous membrane A, provided that the porous membrane A satisfies a particular range of average pore size and porosity.
    Type: Application
    Filed: August 29, 2011
    Publication date: December 12, 2013
    Applicant: TORAY BATTERY SEPARATOR FILM CO., LTD.
    Inventors: Naoki Mizuno, Michihiko Irie, Yoshitaka Ayuzawa, Masanori Nakamura
  • Publication number: 20130288103
    Abstract: A composite porous membrane used as a separator for a battery includes a porous membrane A made of a polyolefin resin and a porous membrane B containing a heat-resistant resin laminated thereto, wherein the surface of the porous membrane B on the side that does not face the porous A has a three-dimensional network structure having nodes, and the peeling interface on the side of the porous membrane B formed when the porous membrane A and the porous membrane B are peeled off has a membrane morphology having pores with a pore size of 50 to 500 nm in an amount of at least 100 pores/10 ?m2.
    Type: Application
    Filed: August 29, 2011
    Publication date: October 31, 2013
    Applicant: Toray Battery Separator Film Co., Ltd.
    Inventors: Naoki Mizuno, Michihiko Irie, Yoshitaka Ayuzawa, Masanori Nakamura
  • Publication number: 20130101889
    Abstract: A composite porous membrane including a porous membrane A formed of a polyolefin-based resin; and a porous membrane B containing a heat-resistant resin and laminated on the porous membrane A, wherein the porous membrane A satisfies formulas (A) to (C), the composite porous membrane satisfies formula (D), and the composite porous membrane satisfies formulas (F) and (F) wherein thickness of porous membrane A<10 ?m formula (A); 0.01 ?m?average pore diameter of porous membrane A?1.0 ?m formula (B); 30% porosity of porous membrane A?70% formula (C); thickness of entire composite porous membrane?13 ?m formula (a); peel strength at interface between porous membrane A and porous membrane B?1.0 N/25 mm formula (E); 20?Y?X?100 formula CO and wherein X is a gas permeation resistance (seconds/100 ccAir) of porous membrane A, and Y is a gas permeation resistance (seconds/100 ccAir) of the composite porous membrane.
    Type: Application
    Filed: August 26, 2010
    Publication date: April 25, 2013
    Applicant: TORAY INDUSTRIES, INC.
    Inventors: Naoki Mizuno, Michihiko Irie, Yoshitaka Ayuzawa, Masanori Nakamura