IP Library Granted Patent US 10,670,099
Granted Patent B2
US 10,670,099 · App. 15/766,815 · Granted Jun 2, 2020

Friction material

Inventors: Mitsuaki Yaguchi (Gunma-Ken, JP); Shinya Kaji (Gunma-Ken, JP); Tomomi Iwai (Gunma-Ken, JP)
Assignee: NISSHINBO BRAKE INC.
F16D69/026C09K3/1436C09K3/1463F16D2200/0073
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Quick Facts
Patent No.
US 10,670,099
App. No.
15/766,815
Granted
Jun 2, 2020
Kind
B2
Abstract

[Object] The present invention provides a friction material used for a disc brake pad, which is manufactured by forming a non-asbestos-organic (NAO) friction material composition that does not contain a copper component, which provides an excellent wear resistance and a highly stable braking effectiveness even after being subjected to a history of high temperatures and high loads. [Means to Resolve] The friction material composition for the friction material molding containing, as an inorganic friction modifier, 10-40 weight % of a monoclinic zirconium oxide with an average particle diameter of 1-8 μm relative to the total amount of the friction material composition, 1.5 weight % or more of a resilient graphitic carbon as a carbon type lubricant relative to the total amount of the friction material composition, and a calcined coke also as a carbon type lubricant, where total amount of the resilient graphitic carbon and the calcined coke is 2-8 weight % relative to the total amount of the friction material composition and a weight ratio of the resilient graphitic carbon and the calcined coke is 4:6-8:2. It is preferable that the friction material composition contains 2-6 weight % of the layered mineral particle as the inorganic friction modifier relative to the total amount of the friction material composition and that the layered mineral particle is mica.

Claims (8)

1. A friction material used for a disc brake pad, which is manufactured by forming a non-asbestos-organic (NAO) friction material composition that does not contain a copper component, wherein

said friction material composition contains as an inorganic friction modifier, 10-40 weight % of a monoclinic zirconium oxide with an average particle diameter of 1-8 μm relative to the total amount of the friction material composition,

1.5 weight % or more of a resilient graphitic carbon as a carbon type lubricant relative to the total amount of the friction material composition and a calcined coke also as a carbon type lubricant, where a total amount of the resilient graphitic carbon and the calcined coke is 2-8 weight % relative to the total amount of the friction material composition, and

a weight ratio of the resilient graphitic carbon and the calcined coke is 4:6-8:2.

2. The friction material according to claim 1 , wherein

the friction material composition contains 2-6 weight % of a layered mineral particle as the inorganic friction modifier relative to the total amount of the friction material composition.

3. The friction material according to claim 2 , wherein

the layered mineral particle is mica.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 22, 2018
From: YAGUCHI, MITSUAKI; KAJI, SHINYA; IWAI, TOMOMI
To: NISSHINBO BRAKE INC.
Reel/Frame 045866/0320 →
Priority Claims (1)
JP 2015-199958 · Oct 8, 2015 · national
Continuity (1)
Related Publication 20180298971A1 · Oct 18, 2018
Cited By (3)
US 12,540,651 US 12,577,998 US 12,643,833