Heat isolation film based on zirconite and polyethylene and preparation method thereof

The invention relates to a heat isolation film based on zirconite and polyethylene and a preparation method thereof, and belongs to the technical field of materials. The heat isolation film consists of a radiation base film layer and an Al (aluminum) film layer, wherein the Al film layer is covered at the surface of the radiation base film layer; the thickness of the radiation base film layer is 0.05 to 1mm, and the thickness of the Al film layer is 0.2 to 1.0mu m; the radiation base film layer is prepared from 70 to 95 parts of polyethylene resin and 5 to 30 parts of zirconite. The preparation method specifically comprises the following steps of adding the zirconite into the polyethylene resin, uniformly mixing, extruding, and forming a base film; evaporating and plating the Al film layerat the surface of the base film under the vacuum condition, so as to obtain the heat isolation film. The heat isolation film has the advantage that a 8-13mu m inner thin film is used for continuouslyradiating energy to the o