Different types of minerals such as aluminium trihydrate, magnesium dihydrate, basic magnesium calcium hydrate carbonate and huntite-hydromagnesite are also reported as HFFR additives by Weil et al., , Liggat et al., , and Hage et al., . The influence of mineral additives on processing properties such as rheology was reported by Liggat , and Hage reported the use of hydrated minerals for ethylene vinyl acetate copolymers.