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This paper evaluates the benefits of polycarbonate resin as a structural layer in high-barrier coextrusions for flexible packaging. High-temperature performance requirements are examined for hot-fill, retort, autoclave, and ovenable packaging. Coextrudable barrier resins and tie layer resins are evaluated for processability, and the benefits of low- and high-moisture barriers are compared in composites using moisture-sensitive oxygen barrier resins. Optimum barrier composite structures are defined and evaluated.
coextrusion, barrier composite, oxygen permeation, moisture vapor transmission, structural layer, moisture sensitivity, tie layers, barrier resins, hot fill, retort, autoclave, heat seal, flexible packaging
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