| 摘要 |
The invention provides a power transmission belt which comprises a compression rubber layer and an adhesion rubber layer both of which are formed of vulcanizate of an ethylene-alpha-olefin-diene rubber compound, and which has a plurality of load carrying cords formed of fiber cords adhered to and embedded in the adhesion rubber layer, wherein the compression rubber layer has a modulus of elasticity in tension of a in the lengthwise direction of the belt and a modulus of elasticity in tension of b in the widthwise direction of the belt, and a and b satisfy the relationship: 0.9<=a/b<=1.2. It is preferred that the compression rubber layer is formed of vulcanizate of ethylene-alpha-olefin-diene rubber compound which has an ethylene content of 55-85% by weight. The compression rubber layer may contain short fibers therein in an amount of not more than 5 parts by weight in relation to 100 parts by weight of the ethylene-alpha-olefin-diene rubber used in such a manner that the fibers are oriented in the lengthwise direction of the belt.
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