US 2025/0375960 A1 · MULTILAYER PACKAGING FILMS

Abstract

This disclosure concerns a multilayer packaging film having a first base layer, a second base layer on the first base layer, and a sealing layer on the second base layer. In some embodiments, a shrinkage value of the second base layer is less than a shrinkage value of the first base layer. In some embodiments, the shrinkage value of the second base layer is greater than or equal to a shrinkage value of the first base layer. In some embodiments, the second base layer has a shrinkage value that is greater than 5%, and the shrinkage value of the second base layer is less than a shrinkage value of the first base layer. Also disclosed are methods of producing multilayer packaging films and hermetically sealed packages (e.g., thermoformed trays or cups and retort pouches) formed from the multilayer packaging film.

Claims22

Dependent claims

A multilayer packaging film comprising:

a first base layer comprising a polyolefin film;
a second base layer on the first base layer, the second base layer comprising a polyolefin film;
and
a sealing layer on the second base layer, the sealing layer comprising a polyolefin film,
wherein one or more of the first base layer or the second base layer comprises an inorganic coating thereon, and wherein the second base layer has a shrinkage value that is greater than 5% measured using the method disclosed in ASTM D2732-03.

2 more elements

Dependencies are inferred from the claim text.

Multilayer packaging films

Life of this patent

Multilayer packaging films

Life of this patent

Abstract

Claims22