Rubber covered roll and rubber composition for rubber covered roll.

摘要

A rubber-covered roll comprises a metallic core (10) and at least one covering vulcanised rubber layer (11,12). The rubber layer is formed by a rubber composition comprising an ethylenically-unsaturated nitrile-conjugated diene type highly-saturated copolymer rubber having a conjugated diene unit content of the polymer chain of at most 25 wt % and a zinc salt of an ethylenically-unsaturated carboxylic acid. The one or a inner rubber layer is formed by a rubber composition comprising 100 parts by weight of a rubber component containing at least 50 wt % of the highly-saturated copolymer rubber and 10-40 parts by weight of the zinc salt (B). A novel rubber composition comprises 100 parts by weight of a rubber component containing 90-50 wt % of the highly-saturated copolymer rubber and 50-10 wt % of a diene rubber, and 10-40 parts by weight of the zinc salt (B).