Tension member for a power transmission belt having a braiding pitch to diameter ratio within a specific range to increase the flex fatigue resistance of the belt

摘要

A tension member of a power transmission belt is formed of a braided cord composed of four aramid fiber strands having the same yarn number. The yarn number of the aramid fiber strands is 700 denier to 1300 denier. A ratio p/d of a braiding pitch p of the braided cord to a diameter d thereof is 3.7