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 flexible multiple layer packaging film, comprising, in order: (a) a first layer of ionomer; (b) a second layer of an olefin-based adhesive polymer having good adhesion to said first layer, said olefin base being chosen from the group consisting of ethylene vinyl acetate and low density polyethylen

A flexible multiple layer packaging film, comprising, in order: (a) a first layer of ionomer; (b) a second layer of an olefin-based adhesive polymer having good adhesion to said first layer, said olefin base being chosen from the group consisting of ethylene vinyl acetate and low density polyethylene; (c) a third layer whose composition is selected from the group consisting of nylon and ethylene vinyl alcohol copolymer; (d) a fourth layer of an olefin-based adhesive polymer, said olefin base being chosen from the group consisting of ethylene vinyl acetate and low density polyethylene; and (e) a fifth layer of an olefinic polymer selected from the group consisting of low density polyethylene, linear low density polyethylene copolymer, and high density polyethylene, said film being susceptible to being made into a flexible package having, as a combination of properties, hermetic seals, peelable opening without tearing across the entire thickness of said film, and good oxygen and moisture barriers.