FRICTION MATERIAL

• US 20160356332A1
• Filed: 12/02/2014
• Published: 12/08/2016
• Est. Priority Date: 12/24/2013
• Status: Active Grant

• Current Assignee: Nisshinbo Brake Incorporated (Nisshinbo Holdings Incorporated)
• Original Assignee: Nisshinbo Brake Incorporated (Nisshinbo Holdings Incorporated)
• Inventors: YAGUCHI, Mitsuaki, KAJI, Shinya
• Granted Patent: US 10,458,500 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C08K 3/042 Graphene or derivatives, e.g. graphene oxides
• CPC Class Codes: C08K 3/22 of metals
• CPC Class Codes: C08K 3/30 Sulfur-, selenium- or tellurium-containing compounds
• CPC Class Codes: C08K 3/32 Phosphorus-containing compounds
• CPC Class Codes: C08K 7/06 Elements
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 2205/06 having improved processability or containing aids for moulding methods
• CPC Class Codes: C08L 61/06 of aldehydes with phenols
• CPC Class Codes: C08L 61/14 Modified phenol-aldehyde condensates
• CPC Class Codes: C08L 61/34 Condensation polymers of aldehydes or ketones with monomers covered by at least two of the groups C08L61/04, C08L61/18 and C08L61/20
• CPC Class Codes: C08L 77/10 Polyamides derived from aromatically bound amino and carboxyl groups of amino-carboxylic acids or of polyamines and polycarboxylic acids
• CPC Class Codes: F16D 2200/006 containing fibres or particles
• CPC Class Codes: F16D 2200/0065 Inorganic, e.g. non-asbestos mineral fibres
• CPC Class Codes: F16D 2200/0086 Moulding materials together by application of heat and pressure
• CPC Class Codes: F16D 69/026 containing fibres

Abstract

The present invention provides a friction material for a disc brake pad, which is able to suppress chipping of an edge of the friction material that occurs under the high speed and high load braking conditions and further to suppress the deterioration of the braking effectiveness under the high speed and high load braking conditions while satisfying laws and regulations relating to the required amount of the content of the copper component. A friction material composition that contains 0.5-10 weight % of a resilient graphitic carbon particle relative to the total amount of the friction material composition as a carbon type lubricant and contains the total amount of a copper component contained in the friction material composition is less than 5 weight % relative to the total amount of the friction material composition.

Claims

1. A friction material which is a non-asbestos-organic friction material utilized for a disc brake pad, which is manufactured by forming a non-asbestos organic friction material composition containing a copper component of less than 5 weight % in total relative to the total amount of the friction material composition, wherein said friction material composition contains 0.5-10 weight % of a resilient graphitic carbon particle relative to the total amount of the friction material composition as a carbon type lubricant.

2. The friction material according to claim 1, wherein said friction material composition contains 1-15 weight % of the ferrous sulfide relative to the total amount of the friction material composition as a metal sulfide type lubricant.

3. The friction material according to claim 2, wherein said friction material composition contains 1-10 weight % of one or any combination of two or more items selected from the group consisting of an aluminum particle, an aluminum fiber, an alloy particle mainly containing aluminum, and an alloy fiber mainly containing aluminum relative to the total amount of the friction material composition as an inorganic friction modifier.