Nanometer compressive film

The invention discloses a nanometer compressive film, which consists of the following components: polystyrene, triethanolamine, methyl benzoate, pentaerythritol stearate, dibasic lead phthalate, nanometer silicon dioxide and ground calcium carbonate. The nanometer compressive film has the advantages that a composite plasticizer is adopted, so that the film is compact in structure, and the air tightness of the prepared compressive film is improved; the air tightness of the compressive film is further improved by nanometer silicon dioxide, and meanwhile, the compressive film is endowed with high physical and mechanical properties.