abstract |
A power transmission belt has a compression section, a tension section, and a load carrying section. The load carrying section has a plurality of reinforcing cords. The reinforcing cords are formed from poly(p-phenylene-2,6-benzobisoxazole) (PBO). In each reinforcing cord, the cords have a yarn twist greater than the cord twist, and the cord twist is in the range of one-forth to one-half of a ply twist. |