Optimizing Sealants, Flexible Packaging Film Structures, and Operating Parameters for Ultrasonic Sealing, 2014 PLACE Conference

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Ultrasonic sealing is an emerging technology that offers potential cost savings to flexible packaging converters through increased line speeds, narrower seals and reduced leakers due to seal area contamination. Most polyethylenes, coextruded films or laminates that can be conductive or heat sealed can also be ultrasonically welded. However, the mechanical forces required in ultrasonic sealing can also weaken films as certain polymers flow out of the seal area and/or fracture due to localized stresses. The amount of flow or weakening varies by polymer type and can be controlled by optimizing sealing parameters for specific multilayer film structures and sealants.