High-strength multilayer composite packaging film material and preparation method thereof

The invention relates to the technical field of multi-layer composite packaging film materials, and discloses a high-strength multi-layer composite packaging film material and a preparation method thereof. The high-strength multilayer composite packaging film comprises a barrier layer and high-strength functional layers coating the upper surface and the lower surface of the barrier layer, the barrier layer is made of polypropylene carbonate; the high-strength functional layer is prepared from the following raw materials: polypropylene, maleic anhydride grafted polypropylene, a plasticizer, an ultraviolet absorbent, a lubricant, a functional antibacterial compound and an antioxidant reinforcing additive. The multi-layer composite packaging film material prepared by the invention has excellent mechanical strength, antibacterial property and antioxidant property; and the use requirements of multiple fields can be met, and the service life is long. 本发明涉及多层复合包装膜材料技术领域，公开了一种高强度多层复合包装膜材料及其制备方法。该种高强度多层复合包装膜，包括阻隔层以及包覆