Rubber composition for sheet conveying rollers and sheet conveying rollers

Abstract

To provide a sheet conveyance roller that can suppress a decrease in coefficients of friction, even when repeatedly conveying sheets with a high content of silicate components such as silica and talc.SOLUTION: A rubber composition for sheet conveyance rollers comprises, as base rubber, (A) an epichlorohydrin-ethylene oxide-allyl glycidyl ether copolymer and (B) a diene rubber. In 100 mass% of the base rubber, the content of the (A) epichlorohydrin-ethylene oxide-allyl glycidyl ether copolymer is 20 mass% or more.SELECTED DRAWING: None

Claims

1. The base rubber contains (A) an epichlorohydrin-ethylene oxide-allyl glycidyl ether copolymer and (B) a diene rubber. The (B) diene rubber is at least one selected from the group consisting of isoprene rubber, butadiene rubber, and styrene-butadiene rubber. The content of the (A) epichlorohydrin-ethylene oxide-allylglycidyl ether copolymer in 100% by mass of the base rubber is 20% by mass or more. The content of the (B) diene rubber in 100% by mass of the base rubber is 20% by mass or more. A rubber composition for sheet conveying rollers, characterized in that the total content of (A) epichlorohydrin-ethylene oxide-allyl glycidyl ether copolymer and (B) diene rubber in 100% by mass of the base rubber is 85% by mass or more.

2. The rubber composition for a sheet conveying roller according to claim 1, wherein the mass ratio ((A) / (B)) of (A) epichlorohydrin-ethylene oxide-allyl glycidyl ether copolymer and (B) diene rubber in the base rubber is 25 / 75 to 75 / 25.

3. The rubber composition for sheet conveying rollers according to claim 1 or 2, further containing a sulfur-based crosslinking agent or an organic peroxide as a crosslinking agent.

4. A sheet conveying roller characterized by being molded from the rubber composition for sheet conveying rollers described in claim 1 or 2.

5. A sheet conveying roller according to claim 4, having a porous structure.

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