Preparation method of integrated multi-layer broadband high-wave-transparent microporous foam material

The invention relates to a preparation method of an integrated multi-layer broadband high-wave-transparent microporous foam material, and belongs to the technical field of communication equipment materials. The preparation method comprises the following steps: fully mixing polyolefin, a modifier and an anti-aging agent, and extruding a sheet by using a three-layer co-extrusion screw extruder; placing the obtained sheet in a mold cavity of a mold pressing foaming machine, pasting release films to the upper surface and the lower surface of the mold cavity, filling supercritical fluid, conducting mold opening for pressure relief, and obtaining the wave-transparent material. In the preparation process, the sheet with a three-layer structure is obtained through extrusion of a three-layer co-extrusion screw, foaming is conducted through the supercritical foaming mold cavity pasted with the release films, the multi-layer wave-transparent material with the two faces compact and small in foaming ratio and the interior