ELECTRICALLY CONDUCTIVE RUBBER COMPOSITION, TRANSFER ROLLER, AND IMAGE FORMING APPARATUS
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United States of America Patent
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Issued Date -
Feb 12, 2015
app pub date -
Jul 22, 2014
filing date -
Aug 7, 2013
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Abandoned
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Abstract
An electrically conductive rubber composition is provided, which comprises a rubber component including an SBR, an EPDM and an epichlorohydrin rubber, a crosslinking component and an azodicarbonamide foaming agent having a volume-based median diameter of 20 to 40 μm. The azodicarbonamide foaming agent is blended in a proportion of 0.5 to 8 parts by mass based on 100 parts by mass of the overall rubber component. A transfer roller (1) is produced by extruding the electrically conductive rubber composition into an elongated tubular body, and continuously feeding out the tubular body in the elongated state without cutting the tubular body to continuously pass the tubular body through a microwave crosslinking device and a hot air crosslinking device to continuously foam and crosslink the tubular body.
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