To provide a belt preventing crack and damage of a belt back surface occurring under a high loaded condition, wear and damage of belt end surface due to movement of the belt to a pulley flange part and maintaining regular operation of an engine by reducing friction coefficient of material used for a tooth part of a toothed belt.
This invention relates to the toothed belt formed by providing a plurality of tooth parts 32 along a longitudinal direction of the toothed belt 5 having core wire 1 embedded in a back part 2, and covering a surface of the tooth part 3 with tooth cloth 4. Dynamic friction coefficient of the tooth cloth 4 used for the tooth part 2 is kept less than 0.2. As the method for that, tooth cloth which consists of polytetrafluorethylene fiber and nylon fiber is used for fiber material constructing the tooth part.
NAKAI TAISUKE
HIRAI NAONOBU
