Information
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Patent Grant
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4280935
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Patent Number
4,280,935
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Date Filed
Friday, August 31, 197944 years ago
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Date Issued
Tuesday, July 28, 198142 years ago
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Inventors
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Original Assignees
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Examiners
Agents
- Armstrong, Nikaido, Marmelstein & Kubovcik
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CPC
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US Classifications
Field of Search
US
- 106 36
- 106 290
- 106 304
- 106 303
- 051 298
- 051 299
- 051 308
- 051 309
- 428 409
- 428 217
- 188 731
- 188 251 A
- 192 107 M
- 260 99813
- 260 3
- 260 9
- 260 38
- 260 37 M
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International Classifications
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Abstract
A friction material of the present invention is directed to secure a required value of an initial effect and the following effects after a friction hysteresis during a brake operation by adding 20-60 wt. % of a high carbon iron powder instead of a ceramic powder in the conventional friction material and also succeed in improving a wear resistance at a high temperature by further adding 0.5-10.5 wt. % of antimony trioxide as a flame retarding material.
Claims
- 1. A friction material wherein a mixture consisting of 20-60 wt.% of a high carbon iron powder having a carbon content of 0.5 to 1.0 wt.%, 0-20 wt.% of an organic friction modifier, 10-40 wt.% of a lubricant, 0-10 wt.% of a metallic powder, 5-30 wt.% of a fiber reinforcing material, 5-15 wt.% of a thermosetting resin and 0.5 to 10.5 wt.% of a flame retarding material is formed by heating under pressure.
- 2. A friction material as defined in claim 1 wherein said fiber reinforcing material consists of metal fiber, glass, aluminosilicate or silicon, or a mixture thereof.
- 3. A friction material as defined in claim 1 wherein said high carbon iron powder is formed in such a manner that an iron ore or a mill scale, or a mixture thereof is reduced by heating under pressure under existence of a coke and a lime and further continuously heated to carburize up to 0.5-1.0 wt.% of carbon content, and then pulverized.
- 4. A friction material as defined in claim 1 wherein said organic friction modifier is at least one element selected from a group consisting of a rubber particle, a cashew dust and a mixture thereof.
- 5. A friction material as defined in claim 1 wherein said flame retarding material is an antimony trioxide.
Priority Claims (2)
Number |
Date |
Country |
Kind |
54-65752 |
May 1979 |
JPX |
|
54-65753 |
May 1979 |
JPX |
|
US Referenced Citations (8)