Power transmission belt and method for fabricating the same

Abstract

Short aramid fibers extruded from a side face of each rib in a V-ribbed belt are formed in curled shape. The root portions of the extruded short aramid fibers are raised from the side face of the rib. The tip portion of each extruded short aramid fiber is bowed in a direction different from a bowing direction of its medial portion. The extruded sections of the short aramid fibers are different in bowing direction from one another to decentralize the orientation thereof.

What is claimed is:  
     
         1 . A method for fabricating a power transmission belt in which some of a crowd of short aramid fibers are extruded from a surface of a compression rubber, the method comprising: 
 the step of grinding the compression rubber into which the crowd of short aramid fibers are mixed in a manner to be oriented in a given direction with a grinding wheel having super abrasives extruded for 50 to 95% in grain size thereof from the surface of the grinding wheel.    
     
     
         2 . A method for fabricating a power transmission belt in which some of a crowd of short aramid fibers are extruded from a surface of a compression rubber, the method comprising: 
 the step of grinding the compression rubber into which the crowd of short aramid fibers are mixed in a manner to be oriented in a given direction with a grinding wheel having super abrasives the density of which is 3.5 and 55%.    
     
     
         3 . A method for fabricating a power transmission belt in which some of a crowd of short aramid fibers are extruded from a surface of a compression rubber, the method comprising: 
 the step of grinding the compression rubber into which the crowd of short aramid fibers are mixed in a manner to be oriented in a given direction with a grinding wheel having super abrasives which are each extruded for 50 to 95% of grain size thereof from the surface of the grinding wheel and the density of which is 3.5 to 55%.