In the flexible plastics converting industry, primed films are commonly extrusion coated or laminated with polyethylene or ethylene copolymers. To achieve sufficient adhesion to a primed film, the converter must insure the process parameters meet certain criteria. These criteria include the following extrusion variables: Melt temperature Coating thickness Air-gap Die/nip offset Acid content of the extrudate In this paper, we use pilot-line studies to examine the effects of these parameters on adhesion to a film primed with a water-borne extrusion primer.
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