Patent ID: 7758937

Claim:
A vulcanizing rubber product comprising: a rubber layer obtained by vulcanizing a rubber composition comprising a rubber component (A), an inorganic filler (B), a plasticizer (C), and a process oil (D); and a brass-plated reinforced layer adjoining to the rubber layer, wherein the rubber component (A) contains 30 to 50 wt % of an acrylonitrile-butadiene rubber, 20 to 35 wt % of an ethylene-propylene-nonconjugated diene rubber, and 25 to 50 wt % of a styrene-butadiene rubber, the inorganic filler (B) is clay, the content of the inorganic filler (B) is 10 to 100 parts by weight with respect to 100 parts by weight of the rubber component (A), and the weight ratio of the plasticizer (C) to the process oil (D) is 15/85 to 75/25.