Method of forming wet friction material by burning off fibers
AssigneeSchaeffler Technologies AG & Co. KG
InventorsRashid Farahati, Murat Bakan
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Abstract
A method of making a wet friction material includes providing an outer layer on a base layer to form the wet friction material. The base layer includes a first proportion of fiber material and a first proportion of filler material. The outer layer includes a second proportion of fiber material and a second proportion of filler material. The second fiber proportion is less than the first fiber proportion and the second filler proportion is greater than the first filler proportion. The method further includes forming a modified outer layer by burning off the fiber material of the outer layer.
Claims20
A method of making a wet friction material comprising:
- providing an outer layer on a base layer to form the wet friction material, the base layer including a first proportion of fiber material and a first proportion of filler material, the outer layer including a second proportion of fiber material and a second proportion of filler material, the second proportion of fiber material being less than the first proportion of fiber material, the second proportion of filler material being greater than the first proportion of filler material, the second proportion of filler material being 45 to 75% weight of the outer layer;
- and
- forming a modified outer layer by burning off the fiber material of the outer layer.
A wet friction material comprising:
- a base layer;
- and an outer layer on the base layer, the base layer including a fiber material and a first filler material, the outer layer including a second filler material and burnt cellulose fibers including activated carbon, the outer layer including pores passing through the outer layer, a proportion of the second filler material being 45 to 75% weight of the outer layer.
Dependencies are inferred from the claim text.