FIELD: packing.
SUBSTANCE: repeatedly closing packing for various products consists of a cover and a packing tray, interconnected in rim zone by a heat sealing. Note that the said cover is made from heat-sealable multi-layer film and a substrate, the said heat-sealable multi-layer film is arranged on the product being packed. Note also that the packing tray is made from heat-sealable multi-layer film and a substrate. Mind that the multilayered film from which the packing tray is heat-sealed features a layered structure adjoining directly the heat-sealed layer. Note also that the said layered structure is formed by the adhesive layer preventing migration of substances by a layer, which comprises, at least, 75% be weight of ethylene copolymer with vinyl alcohol and has thickness less than 2 microns, and a layer of the contact glue arranged consecutively in direction from the packing outside.
EFFECT: simple and convenient repeated opening and repeated closing of packing after its first opening.
22 cl, 4 ex
Authors
Dates
2009-02-27—Published
2004-01-19—Filed