Methods vinylidene chloride emulsion prepared lightweight foamed material

The present invention relates to a process for the preparation of lightweight foamed material using an emulsion of vinylidene chloride, the fiber slurry, vinylidene chloride emulsion, water glass, the polyvalent metal ions, water and blowing agent prepared by a liquid foaming agent having a density of 0.03 flame retardant one kind of lightweight insulation material -0.06g / cm3 of. Wherein the product has water resistance, good corrosion resistance and high surface hardness. Advantage of the present invention is that a wide sources of raw materials, low cost, simple operation, the production process does not produce toxic or harmful substances, and the product has good mechanical properties, flame resistance and insulation properties, expected to become the new environment-friendly flame retardant insulation material.