The invention discloses a multi-layer co-extruded packaging bag film for drinking water and a production method thereof, and belongs to the technical field of drinking water packaging films. The multi-layer co-extruded packaging bag film is co-extruded from various raw materials through multi-layer coextrusion equipment, and sequentially comprises a first PE layer, a second PE layer, a third
adhesive layer, a fourth PA layer, a fifth EVOH layer, a sixth PA layer, a seventh
adhesive layer, an eighth PE layer and a ninth PE layer from top to bottom. The conventional injection-moulded
barrel fordrinking water is reused, so that the hygienic performance is difficult to guarantee. According to the invention, by a multi-layer co-
extrusion technology, different materials are co-extruded in a
molten state through a mould head of a
film blowing machine to form a novel packaging material with different structures, clear
layers, a
barrier function and double-sided low-temperature heat sealing performance; the novel packaging material is disposable, has up-to-standard hygienic indexes and meets drinking water standards; meanwhile, the novel packaging material has very good low-temperature heat-sealing performance so that fast packaging is achieved; the novel packaging material is put on the market and is used on a drinking water
packaging machine, and feedback from customers shows that the effect is good, the
machine operation is smooth, the sealing performance is good, and the
shelf life of water is long.