| abstract |
PROBLEM TO BE SOLVED: To provide a gas barrier laminated film having excellent strength properties and gas barrier properties, which does not impair the excellent gas barrier properties even after boiling treatment, and which can be suitably used for heat sealing. To provide. SOLUTION: A laminated film in which a gas barrier layer composed of an inorganic vapor-deposited layer is formed on one side or both sides of a base layer composed of a polyamide-based film, and further a heat seal layer is formed, wherein the polyamide-based layer constituting the base layer is formed. The shrinkage stress in each direction at 170 ° C. of the film was 9 50 gf / mm 2 or less, and neither is the direction of shrinkage when heat-treated for 10 minutes at 170 ° C. or less 4.0%, discloses a laminated film or sheet shows excellent gas barrier properties even after boiling treatment . |