Preparation process of ultrahigh-barrier film packaging material for traditional Chinese medicine

The invention belongs to the technical field of packaging materials, and particularly relates to a preparation process of an ultrahigh-barrier film packaging material for traditional Chinese medicine. The ultrahigh-barrier film packaging material for the traditional Chinese medicine is sequentially provided with a PET layer, a first modified PE layer and a second modified PE layer from outside to inside; the raw materials of the first modified PE layer and the second modified PE layer have the same composition but different proportions; the raw materials are composed of low-density polyethylene, metallocene polyethylene, maleic anhydride grafted ethylene-octylene copolymer, modified magnesium-copper layered double hydroxide, silicon dioxide grafted quaternary ammonium salt and hexagonal boron nitride. The ultrahigh-barrier film packaging material for the traditional Chinese medicine is composed of the PET layer, the first modified PE layer and the second modified PE layer, the three layers of films have a syn