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US 10,844,919 B2Granted
Wet friction material production methods
AssigneeSchaeffler Technologies AG & Co. KG
InventorsMurat Bakan, Rashid Farahati
Life of this patent
Estimating the term…
Abstract
A method of producing a friction material. The method includes mixing silica containing filler particles and a liquid binder to form a binder-filler liquid mixture. The method also includes saturating a fibrous base material with the binder-filler liquid mixture to form a saturated fibrous base material. The method further includes curing the saturated fibrous base material at a predetermined temperature for a predetermined time to cure the saturated fibrous base material to form the friction material.
Claims15
A method of producing a friction material, the method comprising:
- mixing silica containing filler particles and a liquid binder to form a binder-filler liquid mixture;
- saturating a fibrous base material with the binder-filler liquid mixture to form a saturated fibrous base material, the saturated fibrous base material having a first surface region and a second surface region opposing the first surface region;
- applying silica containing filler particles to the first and/or second surface regions of the saturated fibrous base material to form a surface region impregnated saturated fibrous base material;
- and
- curing the surface region impregnated saturated fibrous base material at a predetermined temperature for a predetermined time to cure the surface region impregnated saturated fibrous base material to form the friction material having a first concentration of the silica containing filler particles in a first friction material surface region and a second concentration of the silica containing filler particles in a second friction material surface region, each of the first and second friction material surface regions have a thickness in a range of 50 to 150 μm, the first or second concentration is 30 to 50 weight % silica containing filler particles based on a total weight of the friction material in the first friction material surface region or the second friction material surface region, and a bulk region extending between the first and second friction material surface regions and the bulk region having a concentration of 1 to 10 weight % silica containing filler particles based on a total weight of the friction material in the bulk region.
2 more elements
A method of producing a friction material, the method comprising:
- saturating a fibrous base material with a liquid binder to form a saturated fibrous base material, the saturated fibrous base material having a first surface region and a second surface region opposing the first surface region;
- applying silica containing filler particles to the first and/or second surface regions of the saturated fibrous base material to form a surface region impregnated saturated fibrous base material;
- and
- curing the surface region impregnated saturated fibrous base material at a predetermined temperature for a predetermined time to cure the surface region impregnated saturated fibrous base material to form the friction material having a first concentration of the silica containing filler particles in a first friction material surface region and a second concentration of the silica containing filler particles in a second friction material surface region, each of the first and second friction material surface regions have a thickness in a range of 50 to 150 μm, the first or second concentration is 30 to 50 weight % silica containing filler particles based on a total weight of the friction material in the first friction material surface region or the second friction material surface region, and a bulk region extending between the first and second friction material surface regions and the bulk region having a concentration of 1 to 10 weight % silica containing filler particles based on a total weight of the friction material in the bulk region.
1 more element
Dependencies are inferred from the claim text.