Non-asbestos friction material

摘要

A non-asbestos friction material is made by molding and curing a composition which includes a fibrous base other than asbestos, a binder, an organic filler, an inorganic filler and an abrasive. The abrasive is composed of one or more inorganic substance selected from among inorganic substances having a Mohs hardness of at least 4.5 and inorganic substances having a Mohs hardness of less than 4.5 and containing at least 50 wt % of a component having a Mohs hardness of at least 4.5. The total amount of organic substances and the total amount of abrasive are in a volumetric ratio of from 1.5/1 to 3.5/1. The friction material thus constituted generates little squeal or other undesirable noise and has a good wear resistance.