Paper feed roll, process for the preparation thereof and silicon

Details Paper feed roll, process for the preparation thereof and silicon Paper feed roll, process for the preparation thereof and silicon

1997-05-16

1999-07-13

Glass, Margaret W.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

524588, 524493, 428447, 523212, 427387, 492 56, C08J 324, B29D 2300

Patent

active

059224266

ABSTRACT:
The present invention provides a paper feed roll adapted for office machines which exhibits a high friction coefficient suitable for the conveyance of copying paper, printing paper, original, etc. and less abrasion. A process for the preparation of such a paper feed roll is also provided. Further, a silicone rubber composition suitable for the foregoing paper feed roll having an excellent formability to roll is provided. In particular, a novel silicone rubber-coated paper feed roll is provided, which is prepared from a silica-containing silicone rubber composition. The silicone rubber obtained by curing the silica-containing silicone rubber composition and composes the paper feed roll has an impact resilience of not less than 80% after curing as determined by JIS K6301, a permanent compression set of not more than 4% under a condition of 25% compression at 70.degree. C. for 22 hours and a 100% modulus of from 0.3 to 1.0 MPa. A novel silica-containing silicone rubber composition for use in a paper feed roll is also provided, which contains a diorganosiloxane represented by the following general formula as a silica treatment: ##STR1##

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