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    • 4. 发明专利
    • METHOD FOR MODIFYING RUBBER VULCANIZED MOLDING
    • JPH11348037A
    • 1999-12-21
    • JP15454998
    • 1998-06-03
    • NOK CORP
    • TOKUMITSU HIDEYUKI
    • B29B15/02
    • PROBLEM TO BE SOLVED: To prolong a lifetime and obtain high function by extracting a rubber modifier by a liquefied carbon dioxide, and then treating a rubber vulcanized molding with a mixture of a carbon dioxide and the modifier of a supercritical state. SOLUTION: A rubber modifier-inorganic oxide particle mixture 1 is filled in a filling container 2. A carbon dioxide is fed from a liquefied carbon dioxide cylinder 3 to the container 2 by using a liquid feeding pump 4. Here, only the modifier is extracted, dissolved and fed into a pressure container 6 containing a vulcanized rubber molding 5. To set the container 6 to a supercritical state, the container 6 is heated by a heating jacket 7, and its temperature control is executed by a temperature sensor 8. Thus, the mixture of the carbon dioxide and the modifier of the supercritical state discharged from the container 6 is guided to a separator 11, an excess rubber modifier is recovered, and reused.