A composite film with thermal properties includes a fiber structure layer and a filling material layer. The fiber structure layer has a plurality of fibers and a first melting temperature. The filling material layer is disposed on the fiber structure layer and has a second melting temperature. At least one of the fibers extends into the filling material layer, and the first melting temperature is greater than the second melting temperature. Wherein the fiber structure layer includes a polymer selected from a group consisting of polyimide, polyurethanes, polyamide, polybenzimidazole, polycarbonate, polyacrylonitrile, polyethyleneterephtalate, poly(vinylidenefluoride), poly4-methylpentene and the arbitrary combinations thereof; the filling material layer includes polyolefin or polyester. |