HIGH-BARRIER AND HIGH-STRENGTH COMPOSITE PACKAGING FILM AND PREPARATION METHOD THEREOF

The present invention discloses a high-barrier and high-strength composite packaging film, including a printed heat-resistant layer, a first plastic film layer, an aluminum foil layer and a second plastic film layer successively arranged, wherein the printed heat-resistant layer is high-density polyethylene resin; the first plastic film layer and the second plastic film layer both are prepared from a modified polyethylene material; the modified polyethylene material is obtained by modifying low-density polyethylene through modified aluminum diboride. The material of the plastic layer prepared in the present invention is the modified polyethylene material, which is obtained by modifying conventional low-density polyethylene. The modified polyethylene not only maintains good processability, but also overcomes the defect that the low-density polyethylene is low in strength. The finally prepared modified polyethylene has the advantages of high strength, low crack possibility, scratch resistance and strong adhesion.