Coated abrasive backing of dimensionally stabilized heat stretched fabric

Coated abrasive material comprising a dimensionally stabilized woven heat stretched fabric backing member in which the warp and fill yarns are composed of polyester fibers, said coated abrasive material having an elongation profile in the warp direction as defined by a line within the area to the left of the line CD in FIG. 3 of the drawing, a thermoset adhesive layer on the front side of the backing member, and abrasive grains attached to the backing member by the adhesive layer, the fabric cover of the woven backing being from 80 to 97%.