Friction material
A friction material containing a fiber base material, a binder, an organic filler, and an inorganic filler, wherein the copper content in the friction material in terms of elemental copper is 0.5% by weight or less relative to the whole friction material, and a particulate or fibrous aluminum alloy and zinc oxide are contained as the inorganic filler.
1. A friction material comprising:
a fiber base material;
a binder;
an organic filler; and
an inorganic filler,
wherein in the friction material,
a content of copper as an element is less than or equal to 0.5 wt % relative to the whole friction material, and
a particulate or fibrous aluminum alloy and zinc oxide are contained as the inorganic filler, and
a content of the aluminum alloy is 0.3 to 3.0 wt % relative to the whole friction material, and
a content of the zinc oxide is 1 to 10 wt % relative to the whole friction material, and
the content of the zinc oxide is higher than the content of the aluminum alloy.
2. The friction material according to claim 1 , wherein the aluminum alloy contains 70 to 85 wt % of an aluminum component.
3. The friction material according to claim 2 , wherein iron oxide is contained as the inorganic filler.
4. The friction material according to claim 3 , wherein a content of the iron oxide is 1 to 15 wt % relative to the whole friction material.
5. The friction material according to claim 1 , wherein iron oxide is contained as the inorganic filler.
6. The friction material according to claim 5 , wherein a content of the iron oxide is 1 to 15 wt % relative to the whole friction material.