| abstract |
The present invention is to provide a rubber composition for vulcanizing bladder excellent in thermal conductivity and a vulcanizing bladder formed of the rubber composition, with which vulcanization efficiency can be improved. The rubber composition for vulcanizing bladder comprises, based on 100 parts by mass of a rubber component comprising 80% by mass or more of a butyl rubber, 20 to 200 parts by mass of at least one type of metal filler selected from the group consisting of metal powder, metal oxide powder, metal hydroxide powder and metal nitride powder, said metal filler having a Mohs hardness of 8 or lower and a mean particle size of 0.3 to 50 μm, and 20 to 80 parts by mass of a carbon black. The vulcanizing bladder is formed of the rubber composition for vulcanizing bladder. |