This utility model discloses a
composite film fresh-locking bag for packaging
fruit juice, comprising a bag body and a cap; the bag body is formed by heat sealing a
composite film; the film layer structure of the
composite film includes a barrier antibacterial substrate layer, an
adhesive layer, and a heat-sealing layer arranged sequentially from the outside to the inside; wherein, the barrier antibacterial substrate layer is a five-layer co-extruded biaxially oriented nylon film, arranged sequentially from the outside to the inside as a printed composite layer, a first
barrier layer, a barrier core layer, a second
barrier layer, and an antibacterial composite layer. This utility model packaging bag has good
oxygen barrier and antibacterial properties, effectively reducing the contact between
fruit juice and outside air, slowing down the oxidative
decomposition and spoilage of nutrients in the
fruit juice, and maintaining its nutritional components and fresh taste. Furthermore, the barrier antibacterial substrate layer of the biaxially oriented nylon film using the structure of this utility model has good
puncture resistance, effectively reducing losses caused by bag
bursting, which is beneficial for the storage and transportation of bagged fruit juice.