| 摘要 |
A power transmission belt includes a body including a cushion rubber layer with a load carrying cord embedded therein. The cushion rubber layer includes a first rubber composition including a hydrogenated nitrile rubber, an unsaturated carboxylic acid metal salt, silica and an organic peroxide. The body also includes a compression rubber layer disposed on the cushion rubber layer. The compression rubber layer includes a second rubber composition including a hydrogenated nitrile rubber, an unsaturated carboxylic acid metal salt, and an organic peroxide. Further, a power transmission belt includes a body including a cushion rubber layer with a load carrying cord embedded therein, the cushion rubber layer including a first rubber composition. The body also includes a compression rubber layer disposed on the cushion rubber layer and including a second rubber composition. The second rubber composition includes a hydrogenated nitrile rubber, an unsaturated carboxylic acid metal salt, short fibers and an organic peroxide. The body further includes a crack-resisting layer disposed on the compression rubber layer and including a substantially fiber-free, substantially carbon black-free rubber composition including a hydrogenated nitrile rubber, an unsaturated carboxylic acid metal salt, and an organic peroxide. Still further, a power transmission belt includes a body having a cushion rubber layer with a load carrying cord embedded therein, the cushion rubber layer comprising a first rubber composition comprising a hydrogenated nitrile rubber, an unsaturated carboxylic acid metal salt, silica and an organic peroxide. The body also includes a compression rubber layer disposed on the cushion rubber layer and comprising a second rubber composition comprising a hydrogenated nitrile rubber, an unsaturated carboxylic acid metal salt, short fibers and an organic peroxide. The body further includes a crack-resisting layer disposed on the compression rubber layer and comprising a substantially fiber-free, substantially carbon black-free rubber composition comprising a hydrogenated nitrile rubber, an unsaturated carboxylic acid metal salt, and an organic peroxide.
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