Patent ID: 7749926
Filing Date: 2010-07-06
Classification: D04H,F16D,Y10T

Abstract:
1. A wet friction member comprising: a nonwoven cloth essentially consisting of aramide fiber and at least one of carbon fiber, carbonized fiber, cellulose fiber and rayon; and a thermo hardening resin; a powder friction conditioner essentially consisting of at least one of diatom earth, graphite, activated carbon, silica powder and cashew dust, wherein the powder friction conditioner is dispersed into the nonwoven cloth by applying the thermo-hardening resin in a liquid state including the powder friction conditioner dispersed therein onto the nonwoven cloth, a distribution rate of the powder friction conditioner is high at a friction surface of the friction member and gradually becomes lower toward a bottom surface thereof, and a porosity of the wet friction member is 35 to 65%, wherein when the wet friction member is divided into a friction surface side layer, an intermediate layer and a bottom surface side layer in a thickness direction, the distribution rate of the powder friction conditioner at the friction surface side layer is ranging from 50 to 80 wt %, the distribution rate of the powder friction conditioner at the intermediate layer is ranging from 20 to 50 wt %, and the distribution rate of the powder friction conditioner at the bottom surface side layer is ranging from 0 to 20 wt %.