| 摘要 |
A paper feed roller formed from a high friction rubber obtained by curing a high friction rubber-forming composition comprising in admixture, (A) a silicone rubber compound containing an organopolysiloxane of the average compositional formula (1): Rn1SiO(4-n)/2(1) wherein R1 is a substituted or unsubstituted monovalent hydrocarbon group, the groups represented by R1 containing up to 95 mol. % of a methyl group, at least 3 mol. % of a phenyl group and at least 0.2 mol. % of a vinyl group, and n is a positive number of from 1.95 to 2.05, and (B) a silicone rubber compound containing an organopolysiloxane of the average compositional formula (2): Rm2SiO(4-m)/2(2) wherein R2 is a substituted or unsubstituted monovalent hydrocarbon group, the groups represented by R2 containing at least 98 mol. % of a methyl group, and m is a positive number of from 1.95 to 2.05, said silicone rubber compounds (A) and (B) being mixed in a weight ratio between 5:95 and 95:5.
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