Method for making a friction material

Solid material comminution or disintegration – Processes – With application of fluid or lubricant material

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241 23, 241DIG37, 523156, 523157, B02C 1912

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active

048464082

ABSTRACT:
Pieces of aramid cloth impregnated with a blend of phenolic and polyvinyl butyral resins are cryogenically chilled to the point of embrittlement in a liquid nitrogen bath and then fed to a rotary impact mill to comminute the pieces into a fibrous material suitable for use in brake linings or other friction applications. The rotary impact mill is chilled by cold gaseous nitrogen from the liquid nitrogen bath, the flow of which is controlled in response to a thermocouple disposed near the mill exit.

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Munson Machinery Company, Inc., "Munson SCC Rotary Cutter", (undated brochure).

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