| 摘要 |
An object is to provide a transmission belt which is restrained from being deteriorated in a high-temperature atmosphere, is excellent in softness in a low-temperature atmosphere, and is hardly worn away. To attain the object, the invention provides a transmission belt made of a rubber composition wherein the ratio by weight of a Ziegler-Natta catalyst type ethylene/α-olefin copolymer rubber, which is an ethylene/α-olefin copolymer rubber obtained by polymerization in the presence of a Ziegler-Natta catalyst, to a metallocene type ethylene/α-olefin copolymer rubber, which is an ethylene/α-olefin copolymer rubber obtained by polymerization in the presence of a metallocene catalyst, is from 50/50 to 90/10. |
