US 11,850,836 B2
Method and installation for producing a multi-layered wet friction material
Stefan Steinmetz, Grünstadt (DE); and Alexander Bonet, Hersbruck (DE)
Assigned to Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
Appl. No. 17/295,214
Filed by Schaeffler Technologies AG & Co. KG, Herzogenaurach (DE)
PCT Filed Nov. 26, 2019, PCT No. PCT/DE2019/101011
§ 371(c)(1), (2) Date May 19, 2021,
PCT Pub. No. WO2020/108701, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 102018129892.7 (DE), filed on Nov. 27, 2018.
Prior Publication US 2022/0010856 A1, Jan. 13, 2022
Int. Cl. B32B 37/12 (2006.01); B32B 29/00 (2006.01); B32B 37/10 (2006.01); F16D 69/00 (2006.01); F16D 69/04 (2006.01)
CPC B32B 37/12 (2013.01) [B32B 29/005 (2013.01); B32B 37/1027 (2013.01); B32B 37/1284 (2013.01); B32B 2037/1238 (2013.01); B32B 2037/1253 (2013.01); B32B 2250/02 (2013.01); B32B 2260/028 (2013.01); B32B 2260/046 (2013.01); B32B 2262/067 (2013.01); B32B 2305/30 (2013.01); B32B 2307/718 (2013.01); B32B 2313/04 (2013.01); B32B 2317/16 (2013.01); B32B 2361/00 (2013.01); B32B 2377/00 (2013.01); B32B 2386/00 (2013.01); B32B 2475/00 (2013.01); F16D 2069/002 (2013.01); F16D 2069/008 (2013.01); F16D 2069/045 (2013.01); F16D 2200/0052 (2013.01); F16D 2200/0078 (2013.01); F16D 2200/0082 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for producing a multi-layered wet friction material, comprising:
providing a bottom layer supplied as a first raw paper;
providing a top layer produced independently of the bottom layer from different materials and a different formulation, the top layer supplied as a second raw paper;
bonding the bottom layer to the top layer by means of temperature and pressure; and
winding the multi-layered wet friction material on a suitable roll.