FIELD: process engineering.
SUBSTANCE: invention relates to coextruded multilayer film for aseptic package. Said coextruded multilayer film comprises inner layer of polyamide, two mid layers each including copolymer of ethylene-vinyl alcohol. Besides it includes first and second outer layer each including olefin polymer or amorphous copolymer of cyclic olefin. Also it comprises two bonding layers each bonding mid layer to appropriate outer layer. Said copolymer of ethylene-vinyl alcohol of the first min layer contains ethylene in amount larger by, at least, 5 wt % than that in copolymer of ethylene-vinyl alcohol of the second mid layer. Aseptic package comprises sterilized feed product and sterilised bad to house it. Sterilised bad is made of said film. Proposed method comprises food product sterilisation, multi-layer co-extruded film sterilisation, making the bag from sterilised film, filling said bad with said food product and bag sealing.
EFFECT: ruled out ingress of oxygen.
15 cl, 7 tbl, 36 ex
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