coxim de freio, sistema de freio e mÉtodo para fabricaÇço de um coxim de freio

A brake pad (20) comprises a first pad layer (30) made of a first friction material and a second pad layer (28) made of a second friction material different from the first friction material and operatively mounted to the first pad layer. The first pad layer has a higher level of friction initially and the second pad layer has a higher level of friction after wearing and the first pad layer is less wear resistant than the second pad layer. As the first pad layer wears away, the second pad layer commences to wear or "break-in." Because the wearing is uneven at the interface (32), portions of the first pad layer continue to offer an immediate and higher level of friction as portions of the second pad layer "break-in" gradually to offer the high level of friction. Eventually, the first pad layer wears away, leaving the second pad layer already "broken-in" for a long-lasting life.