Modified EVA microporous elastomer composite material and preparation method thereof

The invention provides a modified EVA microporous elastomer composite material and a preparation method thereof. In the prior art, the properties of the EVA microporous elastomer composite material are modified mainly by mixing fillings in the EVA, which cannot satisfy the use of the composite material in special fields. The formula includes EVA material, organic montmorillonite, polyurethane, styrene-butadiene rubber, foaming agent, zinc oxide, zinc stearate and stearic acid; and the preparation method comprises the steps of: adding the montmorillonite in the EVA for melting, shearing and dispersion treatment; mixing with the polyurethane and the styrene-butadiene rubber on a double-roller mixing machine after cooling; and adding auxiliary agent, thin-passing for more than ten times, taking off sheets and cutting; coating parting agent on the inner wall of a metal mould, heating, drying, adding the cut mixture to the mould, sealing, heating for 20 minutes, cooling and demoulding. By adopting a nano-intercalation technology, the invention greatly improves the tensile modulus of the modified EVA microporous elastomer material on the premise of basically not decreasing the toughness.