Several types of seven layer coextrusion films

　　(1) High barrier, impermeable packaging film

　　The basic structure is: PA / tie / PE / tie / PA / EVOH / PA / tie / PE

　　It is used for products with long shelf life, such as cooked meat dish, coffee, tea, essence, perfume, food additives, cosmetics, etc.

　　packing. It can also be used in petroleum, chemical, pesticide, highly toxic, acid, alkali, salt and other products with strong permeability and corrosion.

　　(2) Inflatable and fresh-keeping packaging films

　　The basic structure is PE / tie / PA / tie / PA / tie / PE

　　It can be used in the field of modified atmosphere packaging and balloon film.

　　(3) Fresh meat film

　　Basic structure of EVA / Tieh

　　For fresh pork of pig, beef and mutton, it is required to immerse it in 80 ℃ water for 1-3 seconds (or stick it in the hot drying channel) for 1-3 seconds, which has excellent barrier performance and can be stored at low temperature below - 25 ℃.