The application of dry grinding agent did not display any agglomeration or cold welding between the mineral particles as evidenced by the SEM images. The ball milling of the raw fillers in the presence of inorganic salt was found to be able to reduce the particle size of the fillers significantly in a short time. The potential of the ground filler on the tensile properties of low-density polyethylene/styrene butadiene rubber (LDPE/SBR) composites has been reported.

The BET surface area of both minerals increased after milling. The reduction percentage for kaolin was about 82%, and in the case of feldspar, it was about 93%. SEM graphs revealed that a significant reduction in average particle size was recorded for both minerals. The mineral materials were viewed under a scanning electron microscope (SEM) before and after grinding. The application of such grinding agent led to effectively reduce the particle size in a short time. The grinding agent and mineral were mixed at the ratio of 1:1. Both minerals were combined with inorganic salt namely sodium chloride as a grinding agent. Feldspar and kaolin was ball milled at 320 rpm for hours with the aid of a dry grinding agent.