Non-asbestos friction material
AssigneeNisshinbo Industries, Inc.
InventorMasanori Chiba
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Abstract
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.
Claims8
A non-asbestos friction material made by molding and curing a composition comprising:
- a fibrous base o her than asbestos,
- a binder,
- an organic filler,
- an inorganic filler, and
- an abrasive composed of (i) an inorganic substance 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, and (ii) an inorganic substance having a Mohs hardness of at least 6.5;
- wherein a total amount of organic substances and a total amount of abrasive are in a volumetric ratio of 1.5/1 to 3.5/1.
Dependencies are inferred from the claim text.