A transmission belt for a roller conveyor having rollers having concave grooves and made of steel or plastic is disclosed. The belt comprises an elastomer-based body comprising a dorsal portion and a ventral portion formed by a single toothing, an outer surface of which has a convex shape configured to engage with a concave groove of a roller; a set of tension cords embedded in the body between the dorsal portion and the ventral portion of the body; and a coating arranged on the outer surface of the toothing and defining, with the convex shape of the outer surface of the toothing, a coefficient of friction with the concave groove of a roller that is non-zero and less than or equal to 0.8.

A transmission belt for a roller conveyor having rollers having concave grooves and made of steel or plastic is disclosed. The belt comprises an elastomer-based body comprising a dorsal portion and a ventral portion formed by a single toothing, an outer surface of which has a convex shape configured to engage with a concave groove of a roller; a set of tension cords embedded in the body between the dorsal portion and the ventral portion of the body; and a coating arranged on the outer surface of the toothing and defining, with the convex shape of the outer surface of the toothing, a coefficient of friction with the concave groove of a roller that is non-zero and less than or equal to 0.8.

A belt includes: a belt main body; at least one energizing core cord containing a core wire having electrical conductivity; and at least one reinforcing core cord having an electrical resistance per unit length being greater than that of the energizing core cord, wherein the belt main body has at least one belt hole which penetrates the belt main body in a thickness direction, the energizing core cord and the reinforcing core cord are embedded in the belt main body along a length direction of the belt main body to be spaced apart in a width direction of the belt main body, and each distance between the energizing core cord and a periphery of the belt hole is no less than 0.5 mm.

A belt includes: a belt main body; at least one energizing core cord containing a core wire having electrical conductivity; and at least one reinforcing core cord having an electrical resistance per unit length being greater than that of the energizing core cord, wherein the belt main body has at least one belt hole which penetrates the belt main body in a thickness direction, the energizing core cord and the reinforcing core cord are embedded in the belt main body along a length direction of the belt main body to be spaced apart in a width direction of the belt main body, and each distance between the energizing core cord and a periphery of the belt hole is no less than 0.5 mm.