BRAKE PAD Russian patent published in 2016 - IPC F16D69/02 F16D65/92 

FIELD: machine building.

SUBSTANCE: brake pad contains a metal framework and a polymer composite friction element made out of two layers. Each layer contains a polymer matrix, and filler/fillers. The layer of the polymer composite friction element located at the side of the metal framework has the weight ration of the matrix to the filler/fillers larger than in the working layer of the polymer composite friction element.

EFFECT: reduced thermal conductivity of the brake pad in relation to the brake cylinder, increased item resistance to thermal fatigue during sudden heating and cooling of the item during operation due to the increased smoothness of thermal conductivity change as per the layers from the working layer of the friction element to the metal framework.