METHOD FOR MANUFACTURING A FRICTION TRANSMISSION BELT
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United States of America Patent
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app pub date -
Dec 10, 2012
filing date -
Feb 13, 2008
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Abandoned
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Abstract
A method for manufacturing a friction drive belt for transmitting power while being wound around a pulley such that a compression rubber layer provided on an inner periphery of a belt body is in contact with the pulley enables both of noise reduction during the run of the belt and greater durability. A plurality of pores 15 having an average size of 5-120 μm are formed in the compression rubber layer 12 by impregnating uncrosslinked rubber with supercritical or subcritical fluid, and then changing a phase of the supercritical or subcritical fluid to gas, thereby forming the pores with expansion of the fluid such that the compression rubber layer 12 has an air content of 5-40%.
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