Patents Assigned to Bando Chemical Industries, Ltd.
  • Publication number: 20230141466
    Abstract: A transmission system using a toothed belt includes a belt body made of elastomer and a core wire made of carbon fiber and provided so as to be embedded in the belt body and form a helix having a pitch in a belt width direction. The belt body includes a flat band portion having a horizontally long rectangular cross section and a plurality of tooth portions integrally provided on an inner peripheral side of the flat band portion. A belt tension T0.2 per belt width of 1 mm when a belt elongation rate is 0.2% is 70 N/mm or more, an amount of backlash between the toothed belt and a toothed pulley is 0.10 mm or more and less than 0.65 mm, a hardness of the belt body is 89° or more in JIS K 6253 Durometer Type A, and a surface dynamic friction coefficient is 1.5 or less.
    Type: Application
    Filed: December 28, 2022
    Publication date: May 11, 2023
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventor: Kazuyuki TSUBAKINO
  • Patent number: 11644082
    Abstract: A power transmission belt includes a belt body made of an elastomer, and a cord made of carbon fibers and embedded in the belt body. The belt tension T0.2 per 1 mm belt width at 0.2% of a belt extension rate is 70 N/mm or more. The belt tension T0.5 per 1 mm belt width at 0.5% of the belt extension rate is 220 N/mm or more. The ratio of the belt tension T0.2 to the belt tension T0.5 is 0.33 or more.
    Type: Grant
    Filed: November 25, 2022
    Date of Patent: May 9, 2023
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventor: Kazuyuki Tsubakino
  • Patent number: 11643527
    Abstract: A power transmission belt includes a belt body at least portion of which is made of a rubber composition containing a rubber component, cellulose-based fine fibers, and cotton powder.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: May 9, 2023
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Shogo Kobayashi, Hideyuki Kato, Takafumi Masuda
  • Publication number: 20230088538
    Abstract: A power transmission belt includes a belt body made of an elastomer, and a cord made of carbon fibers and embedded in the belt body. The belt tension T0.2 per 1 mm belt width at 0.2% of a belt extension rate is 70 N/mm or more. The belt tension T0.5 per 1 mm belt width at 0.5% of the belt extension rate is 220 N/mm or more. The ratio of the belt tension T0.2 to the belt tension T0.5 is 0.33 or more.
    Type: Application
    Filed: November 25, 2022
    Publication date: March 23, 2023
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventor: Kazuyuki TSUBAKINO
  • Publication number: 20230085893
    Abstract: A power transmission belt includes a belt body made of an elastomer, and a cord made of carbon fibers and provided to be embedded in the belt body and to form a helical pattern having a pitch in the belt width direction. When the cord is viewed from a side orthogonal to its length direction, an angle 0 of an outermost filament in the filament bundle of the carbon fibers forming the cord with respect to the length direction of the cord is 8° or more to 20° or less.
    Type: Application
    Filed: November 25, 2022
    Publication date: March 23, 2023
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventor: Atsushi TAGA
  • Patent number: 11566684
    Abstract: In a toothed belt including a toothed belt body and a reinforcing cloth, the toothed belt body includes a rubber composition and has a base part formed into a flat band shape and a plurality of rubber tooth parts, which are arranged integrally with one face of the base part and spaced apart from each other in a belt lengthwise direction. The reinforcing cloth is attached to the toothed belt body to cover a face, of the toothed belt body, with the rubber tooth parts. Each of the rubber tooth parts is covered with the reinforcing cloth in a corresponding one of cloth-covered tooth parts where a rate of a volume of the reinforcing cloth with respect to a volume of the cloth-covered tooth part is 60% or more.
    Type: Grant
    Filed: April 17, 2020
    Date of Patent: January 31, 2023
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yoshitaka Meki, Atsushi Taga
  • Patent number: 11566124
    Abstract: A crosslinked rubber composition contains a rubber component and para-aramid short fibers having a filament fineness of 2.5 dtex or more and dispersed in the rubber component.
    Type: Grant
    Filed: September 21, 2020
    Date of Patent: January 31, 2023
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Takayuki Okubo, Masashi Kitatsuji, Takuya Mori, Taiichi Okada
  • Patent number: 11530337
    Abstract: The present invention provides an optically clear adhesive sheet using a heat-curable polyurethane composition, wherein the optically clear adhesive sheet can, when bonded to an adherend such as a glass plate, prevent the occurrence of air bubbles even at high temperature and normal humidity and maintain a stable bonded interface. The optically clear adhesive sheet of the present invention is an optically clear adhesive sheet containing: a cured product of a heat-curable polyurethane composition, the heat-curable polyurethane composition containing a polyol component and a polyisocyanate component, the polyol component having an olefin skeleton, the polyisocyanate component containing an acyclic aliphatic polyisocyanate and/or an alicyclic polyisocyanate.
    Type: Grant
    Filed: September 26, 2016
    Date of Patent: December 20, 2022
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yuki Hosokawa, Jun Onishi, Soichiro Nakane
  • Publication number: 20220372303
    Abstract: A water-repellent structure includes: a base material; and a water-repellent layer located on a surface of the base material. The water-repellent layer contains water-repellent particles and filler particles having an average particle size that is 20 times or more as large as an average particle size of the water-repellent particles.
    Type: Application
    Filed: August 5, 2022
    Publication date: November 24, 2022
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Jun ONISHI, Hiroshi SANDA
  • Publication number: 20220349455
    Abstract: A friction transmission belt includes a belt body which transmits power to a pulley. In a relationship between a friction coefficient and a slipping speed which is a difference between a speed of the belt body and a speed of the pulley, when a slipping speed at which a maximum friction coefficient is indicated is defined as a first slipping speed, a friction coefficient when the slipping speed is increased from the first slipping speed to a second slipping speed is defined as a reference friction coefficient, and a difference between the second slipping speed and the first slipping speed is 500 mm/s, a decrease rate Dm of the friction coefficient indicated by the following equation (1) with the maximum friction coefficient being denoted by ?x and the reference friction coefficient being denoted by ?r is not greater than 20%.
    Type: Application
    Filed: April 11, 2022
    Publication date: November 3, 2022
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yuya SHINDO, Shogo KOBAYASHI
  • Patent number: 11466185
    Abstract: The present invention provides an optically clear adhesive sheet having excellent environment resistance using a heat-curable polyurethane composition that has excellent flexibility and is capable of giving a thick film. The optically clear adhesive sheet of the present invention is formed of: a cured product of a heat-curable polyurethane composition, the heat-curable polyurethane composition containing a polyol component, a polyisocyanate component, and a tackifier, the polyol component having an olefin skeleton, the polyisocyanate component being a modified polyisocyanate that is obtained by reacting an acyclic aliphatic and/or alicyclic polyisocyanate containing an isocyanate group with an ether compound containing an ethylene oxide unit.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: October 11, 2022
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Jun Onishi, Yuki Hosokawa
  • Publication number: 20220316554
    Abstract: A V-ribbed belt includes a plurality of V-shaped ribs, each of the plurality of V-shaped ribs includes a V-shaped rib body formed from a rubber composition and a rib-side reinforcing fabric covering a surface of the V-shaped rib body, the rib-side reinforcing fabric is a woven fabric containing a first fiber and a second fiber, and in the woven fabric, at least either the first fiber or the second fiber is inclined relative to a longitudinal direction and a width direction of the belt.
    Type: Application
    Filed: March 25, 2022
    Publication date: October 6, 2022
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Shogo KOBAYASHI, Yuya SHINDO
  • Patent number: 11447662
    Abstract: The present invention provides an optically clear adhesive sheet with reduced delay bubble generation using a thermosetting polyurethane composition that has excellent flexibility and is capable of giving a thick film. The optically clear adhesive sheet of the present invention is an optically clear adhesive sheet formed of a cured product of a thermosetting polyurethane composition, the optically clear adhesive sheet having a shear storage modulus (G?) at 85° C. of 4.5×103 to 5.0×104 Pa, a loss tangent (tan ?) at 85° C. of 0.3 to 0.97, and a thickness of 50 to 2000 ?m. The optically clear adhesive sheet preferably has an adhesive strength measured by a 180° peel test of 2 N/25 mm or more.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: September 20, 2022
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Jun Onishi, Soichiro Nakane, Yuki Hosokawa
  • Patent number: 11441011
    Abstract: Provided is a thermally conductive molded resin article that can be inexpensively mass-produced and that exhibits a low thermal resistance value as a result of reducing internal thermal resistance by high filling and reducing interfacial thermal resistance by improving cutting precision. The thermally conductive molded resin article is characterized by comprising a resin and thermally conductive fillers including a first thermally conductive filler and a second thermally conductive filler having a smaller particle size than the first thermally conductive filler. The thermally conductive molded resin article is also characterized in that: the first thermally conductive filler has an aspect ratio of 10 or more and is oriented approximately in the thickness direction of the thermally conductive molded resin article; the resin is a silicone resin, an acrylic rubber, or a fluororubber; and the second thermally conductive filler has a thermal conductivity surpassing 5 W/mK.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: September 13, 2022
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Fumihiro Mukai, Kotaro Yamaura, Hiroki Naito, Yasuhiro Sako
  • Patent number: 11441020
    Abstract: A power transmission belt includes a pulley non-contacting portion made of a rubber composition. The rubber composition contains a rubber component, cellulose-based fine fibers, and a non-carbon black hydrophilic inorganic filler, and contains no carbon black or contains carbon black in an amount of less than 20 parts by mass relative to 100 parts by mass of the rubber component.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: September 13, 2022
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventor: Shogo Kobayashi
  • Publication number: 20220282769
    Abstract: A V-ribbed belt includes a plurality of V-shaped ribs, each of the plurality of V-shaped ribs includes a V-shaped rib body formed from a crosslinked rubber composition and a fiber member covering a surface of the V-shaped rib body, the crosslinked rubber composition is a crosslinked product of an uncrosslinked rubber composition containing a rubber component, a crosslinking agent, and at least either an unsaturated carboxylic acid metal salt or a maleimide compound, and a total amount of the unsaturated carboxylic acid metal salt and the maleimide compound per 100 parts by mass of the rubber component is 1 to 40 parts by mass.
    Type: Application
    Filed: March 1, 2022
    Publication date: September 8, 2022
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Shogo KOBAYASHI, Yuya SHINDO, Kazuaki MATSUDA, Takayuki OKUBO
  • Publication number: 20220243786
    Abstract: A friction transmission belt includes a compression layer forming a pulley contact portion, the compression layer includes an inner layer formed from a rubber composition and an outer layer provided on a pulley contact side of the inner layer and formed from a fiber member, and a ratio (M10 modulus/M50 modulus) of an modulus at 10% elongation in a belt longitudinal direction (M10 modulus) to an modulus at 50% elongation in the belt longitudinal direction (M50 modulus), of the rubber composition, is not less than 1.5.
    Type: Application
    Filed: January 21, 2022
    Publication date: August 4, 2022
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Yuya SHINDO, Shogo KOBAYASHI, Kazuaki MATSUDA
  • Publication number: 20220229391
    Abstract: The present invention addresses the issue of providing a cleaning blade having excellent durability. An elastic body for blades is provided that has an abutting section that comprises a heat-curable polyurethane urea that is a reaction product of at least a polyol, a polyisocyanate, and a curing agent including a diaminobenzoic acid ester indicated by general formula (1).
    Type: Application
    Filed: May 31, 2019
    Publication date: July 21, 2022
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventor: Ken HIROTOMI
  • Publication number: 20220197182
    Abstract: The purpose of the present invention is to provide a developing roller which is not prone to scumming in a nonprinting area. The solution is to provide a developing roller which has an elastic layer, a coat layer formed on the elastic layer, and end portion coat layers formed on outermost surfaces on two axial end portions, wherein the end portion coat layer contains a conductive material.
    Type: Application
    Filed: June 30, 2020
    Publication date: June 23, 2022
    Applicant: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventors: Taku YAMOTO, Kimiya GOTO, Hideki NORISADA
  • Patent number: 11345805
    Abstract: A rubber composition contains a rubber component, polyparaphenylene terephthalamide short fibers, silica, and carbon black. The content of the silica is larger than the content of the carbon black.
    Type: Grant
    Filed: March 19, 2019
    Date of Patent: May 31, 2022
    Assignee: BANDO CHEMICAL INDUSTRIES, LTD.
    Inventor: Hisashi Matsuda