| 摘要 |
PURPOSE:To obtain the subject sheet composed of a specific rubber composition containing a specific ethylene-propylene-nonconjugated diene rubber as main component, having excellent surface state free from bubbles and exhibiting excellent water-proofness and mechanical properties. CONSTITUTION:This water-proof sheet is composed of a rubber composition having a Mooney viscosity [MU1+4(100 deg.C)] of 30-100 and containing (A) an ethylene-propylene-nonconjugated diene rubber having an iodine value of >=12 and an ethylene content of 50-80wt.% based on the sum of ethylene and propylene, (B) a softening agent (e.g. paraffinic oil) and (C) carbon black. The nonconjugated diene constituting the component A is preferably 5-ethylidene-2- norbornene, etc. The amounts of the components A, B and C are preferably 30-65wt.%, 8-20wt.% and 25-45wt.% based on the rubber composition, respectively. |
