High torque capacity wet paper friction member

Abstract

[Problems]To provide a wet paper friction member which has high torque capacity and excellent thermal stability simultaneously. [Solution Means]A wet paper friction member is produced by impregnating thermosetting resin into a paper body; curing it with heat; and then forming it with pressure. A fiber base material comprises 20-80 wt % of the paper body and comprises cellulose pulp, aramid pulp, and homopolymer acrylic pulp the drainability of which is adjusted to 120-280 ml, and thermosetting resin such as straight phenol resin, alkyl modified phenol resin, epoxy modified phenol resin, tung oil modified phenol resin, cashew oil modified phenol resin, tung oil/cashew modified phenol resin is impregnated at 20-40 wt %, and thereby, high torque capacity and heat resistance, and mechanical strength are realized simultaneously.

1 . A wet paper friction member which is produced by impregnating thermosetting resin into a paper body; curing it by heating; and forming it with pressure, 
 wherein said paper body comprises fiber base material and filler,    characterized in that said fiber base material comprises 20-80 wt % of said paper body and comprises cellulose pulp, aramid pulp, and homopolymer acrylic pulp the drainability of which is 120-280 ml.    
     
     
         2 . A wet paper friction member as claimed in  claim 1 , wherein said thermosetting resin comprises any one of some of resins among straight phenol resin, alkyl modified phenol resin, epoxy modified phenol resin, tung oil modified phenol resin, cashew oil modified phenol resin, tung oil/cashew oil modified phenol resin.  
     
     
         3 . Cancelled  
     
     
         4 . A wet paper friction member as claimed in  claim 1 , wherein said thermosetting resin comprises 20-40 wt % of said friction member.  
     
     
         5 . A wet paper friction member as claimed in  claim 2 , wherein said thermosetting resin comprises 20-40 wt % of said friction member.