Patents Assigned to Toyobo Co., Ltd.
  • Publication number: 20230374234
    Abstract: The invention provides a biaxially oriented polyester film with a good balance among moldability during hot molding, film strength and elasticity, while suppressing deposition of an oligomer (whitening) due to heating in a coating step of an adhesive resin or the like during the molding process, and which can be used to provide a molded body, a label or the like. The biaxially oriented polyester film has a content of an ester constituent unit derived from an isophthalic acid component relative to 100% by mole of all ester constituent units in the constituent polyester resin of 0.5-5.0% by mole; a haze change when heated at 150° C. for 30 minutes of 5.0% or less; a limiting viscosity of the constituent polyester resin of 0.59-0.65 dl/g; an average storage elastic modulus at 150° C. of 5.0-7.6×108 (Pa); and an acid value of 40-60 eq/ton.
    Type: Application
    Filed: September 29, 2021
    Publication date: November 23, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Kiwamu KAWAI, Akira SHIMIZU, Isao TAKII
  • Publication number: 20230374349
    Abstract: Disclosed is a biaxially oriented polyester film that is excellent in adhesiveness with a metal layer etc., and excellent in deep drawability for an isotropic chape, such as a square shape. A biaxially oriented polyester film having at least a base layer and an adhesive layer each of which contains a polyester as a main component, the film satisfying the following requirements (1) to (3): (1) a difference between reversible heat capacity difference (?Cp) at around glass transition temperatures of the adhesive layer and the base layer is not smaller than 0.10 and not larger than 0.45; (2) a molecular orientation ratio measured by using a molecular orientation meter is higher than 1.2; and (3) a stress at 10% elongation (F10) in each of a machine and transverse direction is not lower than 90 MPa and not higher than 160 MPa.
    Type: Application
    Filed: October 4, 2021
    Publication date: November 23, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Noboru TAMARI, Masayuki HARUTA
  • Publication number: 20230365747
    Abstract: The present invention provides a polyester resin and a hollow molded body containing reduced amounts of cyclic trimer and aluminum-based foreign matter, with maintained catalytic activity and a reduced catalyst cost. A polyester resin, comprising an aluminum compound and a phosphorus compound, and satisfying the following (1) to (3): (1) a content of aluminum element in the polyester resin is 9 to 19 ppm by mass, (2) a content of phosphorus element in the polyester resin is 22 to 40 ppm by mass. and (3) a mole ratio of phosphorus element to aluminum element in the polyester resin is 1.55 or more and 1.85 or less.
    Type: Application
    Filed: September 2, 2021
    Publication date: November 16, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Satoru NAKAGAWA, Kosuke UOTANI, Shinya KANETAKA
  • Publication number: 20230365804
    Abstract: The invention provides a biaxially oriented polyester film roll which has excellent transparency and mechanical characteristics, as well as an excellent ability to be wound up into a roll and/or lubricity during film manufacturing operations, which is environmentally friendly, and which exhibits little variation in physical properties in the machine direction thereof even when in the form of a long film roll, i.e., a roll of long wound length, and a production method therefor. In particular, the invention provides a biaxially oriented polyester film roll, wound up at which there is a biaxially oriented polyester film comprising a polyester resin composition comprising particles and polyester resin recycled by the market and/or society and including PET bottles, the biaxially oriented polyester film roll satisfying predetermined ranges of haze, purge time for air, arithmetic mean height Sa, maximum projecting height Sp, and variation thereof.
    Type: Application
    Filed: August 6, 2021
    Publication date: November 16, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Nobuyuki MANABE, Takamichi GOTO, Masayuki HARUTA
  • Publication number: 20230365796
    Abstract: Provided are a heat-shrinkable label and a package each having solvent bonded-portion where solvent penetration-through is not caused even when the film is thin. Provided are particularly a heat-shrinkable label and a package each having solvent bonded-portion gaining a high peel strength stability even when the film is passed through a tubing step made high in speed. A heat-shrinkable label has a tubular shape, in which both end portions of a heat-shrinkable polyvinyl chloride-based film or a heat-shrinkable polystyrene-based film are bonded to each other with a solvent composition. The solvent composition contains at least one organic solvent selected from the group consisting of tetrahydrofuran (THE), methyl ethyl ketone (MEK) and ethyl acetate, and at least one resin selected from the group consisting of polyester, polypropylene and hydrogenated petroleum resin, and the end portion bonded has a peel strength of 2 N/15 mm or more.
    Type: Application
    Filed: July 24, 2023
    Publication date: November 16, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Masafumi INOUE, Masayuki HARUTA, Hisao OKU
  • Publication number: 20230348661
    Abstract: The invention provides a heat-shrinkable polyester-based film which has a high heat shrinkage ratio in the main shrinkage direction, as well as a high film puncture strength, bag breakage resistance upon bottle dropping, and excellent stiffness because of the high density of the film. The heat-shrinkable polyester-based film contains 60-95 mol % ethylene terephthalate units in 100 mol % of all ester units, 5-40 mol % diethylene glycol in 100 mol % of the polyhydric alcohol component, and 0-5 mol % constituent units derived from a monomer component that can be an amorphous component in all polyester resin components, in which the hot water heat shrinkage ratio, the puncture strength of the film, the density of the film, and the refractive index in the longitudinal direction of the film are within predetermined ranges when the film is immersed in hot water at 90° C. for 10 seconds.
    Type: Application
    Filed: July 21, 2021
    Publication date: November 2, 2023
    Applicant: TOYOBO CO., LTD.
    Inventor: Masayuki HARUTA
  • Patent number: 11801661
    Abstract: A paint substitute film comprises a base film, a colored layer, and a hard coat layer, wherein the base film, the colored layer, and the hard coat layer are laminated in this order. The base film contains thermoplastic resin and concealing material. Refractive index of the concealing material is not less than 1.70. Scattering coefficient from wavelength 400 nm to 700 nm of the base film is not less than 0.20 ?m?1. Contrast ratio of the base film when at 20% elongation is not less than 0.70.
    Type: Grant
    Filed: July 10, 2020
    Date of Patent: October 31, 2023
    Assignee: TOYOBO CO., LTD.
    Inventors: Yoshitaka Tanaka, Koji Kubo
  • Publication number: 20230340261
    Abstract: It is provided that a biaxially stretched polyamide film that has excellent resistance to pinhole formation due to bending, has excellent resistance to pinhole formation due to repeated contact, has excellent piercing resistance, and further can suppress generation of foreign matter during film formation. A biaxially stretched polyimide film comprising a functional layer (layer B) laminated on at least one surface of a base layer (layer A), wherein the base layer (layer A) contains at least (a) 70 to 99% by mass of a polyamide 6 resin, and (b) 1 to 20% by mass of an aliphatic or aromatic-aliphatic polyester resin, and the functional layer (layer B) contains at least 70% by mass or more of a polyamide 6 resin.
    Type: Application
    Filed: March 24, 2021
    Publication date: October 26, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Kazushige UEDA, Takamichi GOTO, Takuro ENDO
  • Patent number: 11794456
    Abstract: It is provided that the laminated stretched polyamide film having excellent water-resistant adhesiveness (water-resistant lamination strength), shock resistance, and pinhole resistance. A laminated stretched polyamide film that is a biaxially stretched polyamide film comprising three layers including layer B: an easily adhesive layer, layer A: a base layer, and layer C: a slippery layer in this order, wherein the layer A contains not lower than 65% by mass of polyamide 6, the layer B contains 0 to 40% by mass of polyamide 6 and 60 to 100% by mass of a polyamide 6 copolymer in which a ratio of a copolymerization component in the copolymer is 3 to 35% by mass, and the layer C contains not lower than 70% by mass of polyamide 6 and 0.05 to 1% by mass of fine particles having an average particle diameter of 0.1 to 10 ?m.
    Type: Grant
    Filed: March 10, 2020
    Date of Patent: October 24, 2023
    Assignee: TOYOBO CO., LTD.
    Inventors: Takuro Endo, Kosuke Hama
  • Patent number: 11794457
    Abstract: A multilayered stretched polyamide film which is biaxially stretched, and comprises three layers composed of a polyamide resin composition and comprising layer B as an easily adhesive layer, layer A as a base layer, and layer C as an easily slippery layer in this order, wherein the film satisfies the following (1) to (4); (1) the layer A contains 50 to 90% by mass of polyamide 6 and 10 to 50% by mass of a polyamide 6 copolymer in which a ratio of a copolymerization component in the copolymer is 3 to 35% by mass; (2) the layer B contains 0 to 40% by mass of polyamide 6 and 60 to 100% by mass of the polyamide 6 copolymer in which a ratio of the copolymerization component in the copolymer is 3 to 35% by mass; (3) the layer C contains 70% by mass or more of polyamide 6 and 0.05 to 1% by mass of fine particles having an average diameter of 0.1 to 10 ?m; (4) the film has tensile strength at break of 150 MPa or more both in MD direction and TD direction; and (5) the film has laminate strength of 3.3 N/15 mm or more.
    Type: Grant
    Filed: August 26, 2020
    Date of Patent: October 24, 2023
    Assignee: TOYOBO CO., LTD.
    Inventors: Takamichi Goto, Takuro Endo
  • Publication number: 20230330587
    Abstract: An organic solvent recovery system in the present invention includes an organic solvent recovery apparatus that performs an adsorption treatment to adsorb an organic solvent in a treatment target gas in a plurality of first treatment tanks connected in a series multi-stage configuration and a desorption treatment in one of the first treatment tanks that is selected in sequence, and an organic solvent concentrator apparatus that performs an adsorption and desorption treatment and a desorption treatment in second treatment tanks, the start of the desorption treatment is performed in the selected one of the first treatment tanks and the second treatment tank at the same time.
    Type: Application
    Filed: September 3, 2021
    Publication date: October 19, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Samu Tateyama, Toshiaki Hayashi, Takemasa Okada
  • Publication number: 20230330977
    Abstract: The invention provides a biaxially-oriented polypropylene film that contains a base layer (A) comprising a polypropylene resin as a main component, a surface layer (B) provided at one side of the base layer (A), and a surface layer (C) provided at one side of the base layer (A) opposite to the surface layer (B), wherein the surface layer (B) has a wetting tension of 38 mN or more, a surface resistance value of 14.0 Log? or more, an arithmetic average roughness (Ra) of 3.0-5.5 nm, a Martens hardness of 248 N/mm2 or less, and a center plane average surface roughness (SRa) of 0.010-0.026 µm, and the surface layer (C) has a center plane average surface roughness (SRa) of 0.020 µm or more and a Martens hardness of 270 N/mm2 or more.
    Type: Application
    Filed: June 14, 2021
    Publication date: October 19, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Mahiro NAKANO, Toru IMAI
  • Publication number: 20230321954
    Abstract: The laminated film comprising a coating layer and an inorganic thin film layer on one surface of a substrate film, wherein the laminated film satisfies the following requirements (a) to (f): (a) the substrate film contains 50% by weight or more and 95% by weight or less of a polyester resin recycled from PET bottles; (b) a surface hardness of an inorganic thin film layer surface of the laminated film is 120 N/mm2 or less; (c) the coating layer contains a resin having an oxazoline group or a carbodiimide group as a constituent component; (d) a content rate of an isophthalic acid component relative to a total dicarboxylic acid component in a whole polyester resin constituting the substrate film is 0.5 mol % or more and 5.0 mol % or less; (e) both a coefficient of static friction ?s and a coefficient of dynamic friction ?d of the inorganic thin film layer surface/an opposite surface of the laminated film are within a range of 0.20 to 0.
    Type: Application
    Filed: February 16, 2021
    Publication date: October 12, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Atsushi YAMAZAKI, Yuya YAMAGUCHI
  • Publication number: 20230323021
    Abstract: The invention provides a heat-shrinkable polyester film with high heat shrinkage ratio in a main shrinkage direction and is also satisfactorily recyclable with used beverage PET bottles to produce a recycled PET resin. The heat-shrinkable polyester film comprises 95-100 mol % of dicarboxylic acid and 0-5 mol % of isophthalic acid in 100 mol % of whole dicarboxylic acid component, 85-98 mol % of ethylene terephthalate unit in 100 mol % of whole ester unit, and 2-15 mol % of diethylene glycol in 100 mol % of whole polyol component, wherein the film has the predetermined hot-water heat shrinkage ratio, as well as the melting peak temperature, the amount of exothermic heat in crystallizing, and the amount of endothermic heat in melting within the predetermined range which are determined through differential scanning calorimetry (DSC) in heating the film to be melted, quenching the film, and re-heating the film.
    Type: Application
    Filed: August 19, 2021
    Publication date: October 12, 2023
    Applicant: TOYOBO CO., LTD.
    Inventor: Masayuki HARUTA
  • Publication number: 20230312852
    Abstract: Provided is a layered body including glass and a polyamic acid heat-cured product that is readily releasable from an inorganic substrate after being heated at 250° C. A layered body including an inorganic substrate and a polyamic acid heat-cured product, the layered body being characterized by a weight average molecular weight of 30,000 or greater for the polyamic acid, and a peel strength of 0.3 N/cm or weaker between the polyamic acid heat-cured product layer and the inorganic substrate, after the layered body has been heated at 250° C.
    Type: Application
    Filed: August 10, 2021
    Publication date: October 5, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Kaya TOKUDA, Tetsuo OKUYAMA, Naoki WATANABE, Hiroyuki WAKUI, Harumi YONEMUSHI, Denichirou MIZUGUCHI
  • Publication number: 20230312200
    Abstract: The invention provides a laminated film that comprises a coating layer comprising an inorganic lamellar compound and a polyvinyl-alcohol-based copolymer on at least one face of a substrate film, wherein (a) the substrate film is a stretched film employing propylenic resin; (b) the coating layer is attached thereto in an amount that is not less than 0.10 g/m2 but not greater than 0.50 g/m2; (c) a total reflection infrared absorption spectrum of the laminated film is such that a ratio (P1/P2) of a peak intensity (P1) at which there is maximum absorption in a 1040 cm-1 ± 10 cm-1 domain and a peak intensity (P2) at which there is maximum absorption in a 3300 cm-1 ± 10 cm-1 domain is 3.0 to 25.0; and (d) arithmetic mean roughness in a 2-µm square of the coating layer at the laminated film is 2.0 nm to 8.0 nm.
    Type: Application
    Filed: July 29, 2021
    Publication date: October 5, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Atsushi YAMAZAKI, Daisuke IWATA, Yuya YAMAGUCHI
  • Publication number: 20230317964
    Abstract: The invention provides a polyphenylene sulfide film formed of a polyphenylene sulfide resin composition and comprising at least one layer, wherein the (a) polyphenylene sulfide film has a thickness of 0.2-30 ?m, (b) the polyphenylene sulfide film has a tensile elongation at break of 30%-150% in each of an MD direction and a TD direction, (c) a relationship between the tensile elongation at break in the MD direction (SMD) and the tensile elongation at break in the TD direction (STD) satisfies the formula 0.75?SMD/STD?1.25, and (d) the polyphenylene sulfide film has a heat shrinkage rate at 180° C. for 30 minutes of 4% or less in both the MD direction and the TD direction.
    Type: Application
    Filed: June 17, 2021
    Publication date: October 5, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Shotaro NISHIO, Akira SHIMIZU
  • Publication number: 20230312968
    Abstract: This invention provides a paint formulation that is used as a primer of a polypropylene substrate for automotive exterior parts etc., that has better chemical resistance and high-pressure car washing resistance than in the past, and that has good storage stability of the paint. Specifically, provided is a paint formulation comprising a modified polyolefin (A) having a glass transition temperature of ?30° C. or more and a (meth)acrylic resin (B) having a glass transition temperature of 0° C. or more, and having a hydroxy value of 5 to 100 mgKOH/g and an acid value of 0 to 30 mgKOH/g, wherein a (meth)acrylic acid ester monomer constituting the (meth)acrylic resin (B) comprises at least one member selected from methyl (meth)acrylate, ethyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, and an OH group-containing (meth)acrylate.
    Type: Application
    Filed: September 3, 2021
    Publication date: October 5, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Hokuto YAMASAKI, Kenji KASHIHARA
  • Publication number: 20230303827
    Abstract: The present invention is an inorganic material-reinforced thermoplastic polyester resin composition which enables to provide a long and thin molding excellent in appearance while maintaining proper mechanical properties such as rigidity and impact resistance, which contains 20 to 55 parts by mass of a polybutylene terephthalate resin (A), 1 to 30 parts by mass of a polyethylene terephthalate resin (B), 3 to 30 parts by mass of a semicrystalline resin and/or amorphous resin (C), and 25 to 65 parts by mass of an inorganic reinforcing material (D). The inorganic reinforcing material (D) in the resin composition has a number average fiber length Ln of 100 to 500 ?m. The inorganic material-reinforced thermoplastic polyester resin composition is excellent in fluidity, and has a crystallization temperature during cooling within a specified range.
    Type: Application
    Filed: August 4, 2021
    Publication date: September 28, 2023
    Applicant: TOYOBO CO., LTD.
    Inventors: Takahiro SHIMIZU, Yoshitaka AYUZAWA
  • Patent number: 11767397
    Abstract: The present invention aims to provide a resin composition which can form a cured product having a high adhesive property and a high thermal conductivity. A resin composition containing an epoxy compound (A), an amine curing agent (B) and a thermally conductive filler (C), wherein the epoxy compound (A) is in a liquid form and wherein the amine curing agent (B) contains a benzoxazole skeleton.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: September 26, 2023
    Assignee: TOYOBO CO., LTD.
    Inventors: Gota Takimoto, Michihiko Irie