ULTRALOW EXPANSION BRAKE RUBBER HOSE AND ITS PRODUCTION METHOD

• Main Authors: ONO, SHIGEO, TERASHIMA, TAKASHI
• Format: Patent
• Language: English; French; Japanese
• Published: 05.07.2001
• Edition: 7
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; BEER; BIOCHEMISTRY; BLASTING; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; CALCULATING; CHEMISTRY; COMPOSITIONS OR TEST PAPERS THEREFOR; COMPOSITIONS THEREOF; COMPUTING; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL ORENZYMOLOGICAL PROCESSES; COUNTING; CULTURE MEDIA; ELECTRIC DIGITAL DATA PROCESSING; ENGINEERING ELEMENTS AND UNITS; ENZYMOLOGY; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; JOINTS OR FITTINGS FOR PIPES; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; LIGHTING; MEANS FOR THERMAL INSULATION IN GENERAL; MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEICACIDS OR MICROORGANISMS; MECHANICAL ENGINEERING; METALLURGY; MICROBIOLOGY; MICROORGANISMS OR ENZYMES; MUTATION OR GENETIC ENGINEERING; PERFORMING OPERATIONS; PHYSICS; PIPES; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OFVEHICLES; PROCESSES OF PREPARING SUCH COMPOSITIONS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; PROPAGATING, PRESERVING OR MAINTAINING MICROORGANISMS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SPIRITS; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; THERMAL INSULATION IN GENERAL; TRANSPORTING; VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES; VEHICLES IN GENERAL; VINEGAR; WEAPONS; WINE; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

An ultralow expansion brake rubber hose is characterized in that the hose comprises an inner rubber tube, a first reinforcing layer, a second reinforcing layer, and an outer rubber tube, a thermosetting resin which is set at the vulcanizing temperature is penetrated through reinforcing fibers constituting the first layer and cured by vulcanization, and thereby the first layer is made an integral cured layer. Therefore, the slippage between the reinforcing fibers of the first layer is prevented because the first layer is thus a cured layer, providing a brake hose low in expansion and excellent in durability. Such a brake hose is produced by a method comprising the step of forming a first reinforcing layer on the inner rubber tube by stranding, the step of penetrating a thermally curing resin liquid through reinforcing fibers constituting the first reinforcing layer by soaking the first reinforcing layer in the thermosetting resin liquid of low viscosity, the step of forming a second reinforcing layer by stranding, and the step of extrusion-molding an outer rubber tube on the second reinforcing layer. Cette invention se rapporte à un flexible de frein en caoutchouc à très faible expansion, qui se caractérise par le fait que le flexible comprend un tube en caoutchouc interne, une première couche de renforcement, une seconde couche de renforcement et un tube en caoutchouc externe, une résine thermodurcissable qui est durcie à la température de vulcanisation est amenée à pénétrer à travers les fibres de renforcement constituant la première couche et durcie par vulcanisation et, ainsi, la première couche est faite d'une couche durcie intégrée. Par conséquent, tout glissement entre les fibres de renforcement de la première couche est empêché, dès lors que la première couche est une couche durcie, formant ainsi un flexible de frein ayant une faible expansion et une excellente durabilité. Un tel flexible de frein est produit par un procédé consistant à former une première couche de renforcement sur le tube en caoutchouc interne, par toronnage, à faire pénétrer une résine liquide thermodurcissable à travers les fibres de renforcement constituant la première couche de renforcement, par trempage de la première couche de renforcement dans la résine liquide thermodurcissable à faible viscosité, à former une seconde couche de renforcement par toronnage, et à mouler par extrusion un tube en caoutchouc externe sur la seconde couche de renforcement.