Packaging roll stock with windows

摘要

A process for manufacturing a laminate is disclosed. The laminate is for forming a package having one or more windows for viewing the contents of said package. The process comprises the step of extrusion laminating, onto a first material perforated by a hole for and defining each of said windows, a heat-sealable second material. A laminate produced by the process is also disclosed. A heat-sealed package produced with the laminate is also disclosed.

主权项

1. A laminate for forming a package having one or more windows for viewing the contents of said package, said laminate comprising:
a layer of a first material having formed therein a hole for and defining each of said one or more windows; a layer of a second heat-sealable plastic material spaced from the layer of the first material; and a layer of extruded thermoplastic between the layer of the first material and the layer of the second heat-sealable plastic material such that the one or more windows are hermetically sealed by plastic; wherein the layer of extruded thermoplastic extends on top of the layer of the second heat-sealable plastic material to: (i) continuously connect the first and second layers, (ii) span across the entire area of each window, and (iii) define a hermetic seal between the boundary of each window and the layer of the second heat-sealable plastic material; wherein the layer of extruded thermoplastic and the layer of heat-sealable plastic material permit the contents of a package produced from the laminate to be viewed; and wherein the second heat-sealable plastic material is a multi-layer heat-sealable plastic material including a barrier film and a sealant film.