Heat Resistant Filler Masterbatches are produced for polypropylene woven fabrics for better strength and stiffness, especially in low denier fabrics. Filler Masterbatches improves the stiffness of tapes, gives smoothness to process the polymer in extruder. Filler Masterbatches offer Anti-blocking effect and does not reduce strength and elongation. Heat Resistant Filler Masterbatches can improve heat resistance and flexural rigidity.