Polyolefin adhesive film

A polyolefin adhesive film, comprising:

• a support base layer being a polypropylene film;
• and
• a bonding adhesive layer being formed on a side surface of the support base layer by co-extrusion;
• wherein the bonding adhesive layer includes a maleic anhydride modified-polyolefin copolymer and epoxy siloxane modified-inorganic particles dispersed in the polyolefin copolymer;
• wherein a graft ratio of the maleic anhydride modified on the polyolefin copolymer ranges from 1% to 5%, and a weight ratio of the epoxy siloxane modified on the inorganic particles ranges from 0.3% to 4%;
• wherein, based on a total weight of the bonding adhesive layer being 100 wt %, a content of the maleic anhydride modified-polyolefin copolymer is pot less than 90 wt % and a content of the epoxy siloxane modified-inorganic particles ranges from 500 ppm to 2,000 ppm;
• wherein, when the polyolefin adhesive film undergoes a heating operation, the epoxy siloxane modified on the inorganic particles and the maleic anhydride modified on the polyolefin copolymer undergo a cross-linking reaction, so that a hardness of the bonding adhesive layer is increased.