The heat insulation layer is composed of non heat transfer materials for heat insulation.
The friction block is composed of friction material and adhesive. When braking, it is squeezed on the brake disc or brake drum to produce friction, so as to achieve the purpose of vehicle deceleration and braking.
Because of the friction, the friction block will be worn gradually. Generally speaking, the lower the cost of the brake pad, the faster the wear.
After using the friction material, the brake pad should be replaced in time, otherwise the steel plate will contact with the brake disc directly, and eventually the brake effect will be lost and the brake disc will be damaged.
