초록 ▼

The invention discloses a multiple layer packaging film, packages made therefrom and a method of opening the packages. The invention provides inseparable seal strength and in some cases hermetic seals, in combination with peelable ply separation opening for access to the contents of the package, whi

The invention discloses a multiple layer packaging film, packages made therefrom and a method of opening the packages. The invention provides inseparable seal strength and in some cases hermetic seals, in combination with peelable ply separation opening for access to the contents of the package, while at the same time providing excellent barriers to transmission of oxygen and moisture. Certain embodiments provide for improved abuse resistance, excellent graphics, and other improvements. The method of opening the package depends on separating opposing ones of the package sidewalls, forcing the opening tear to be propagated partially through the film to a peelable layer interface, with subsequent ply separation along the interface to effect completion of opening of the package.

대표청구항 ▼

A method of opening a package to the outside environment for accessing product in the package, wherein the materials and method of constructing the package contribute to enablement of the opening method and its function, said package comprising, as a packaging material, a multiple layer sheet materi

A method of opening a package to the outside environment for accessing product in the package, wherein the materials and method of constructing the package contribute to enablement of the opening method and its function, said package comprising, as a packaging material, a multiple layer sheet material, said method comprising the steps of: (a) constructing said sheet material with a peelable interface between two of said layers; (b) positioning said sheet material in closure relationship to make a package; (c) forming said package, and closing and sealing said package with seals between adjacent packaging element members, the force required to peel apart said seals being greater than the force required to tear partially through said sheet material to said interface and to separate said two layers by ply separation; and (d) applying outwardly directed forces on opposite sides of said closed and sealed package at locations inward of said seals thus applying force directed toward separating the sides of said package at said seals; (e) tearing said sheet material from the inner layer outwardly partially through said sheet material to said peelable interface; (f) progressing said tear along said peelable interface to the outer edge of said package to peel apart said sheet material; steps (d), (e) and (f) functioning to open said package for access to the contents thereof from the outside.