A new food-grade heat-seal adhesive is needed for roll-coated film lids. New chemistries must be formulated into a waterbased matrix to seal transparent film onto plastic trays containing food or medical materials. The organization deals primarily with polyester films (APET/CPET) and trays, and containers made from polystyrene (PS), polyethylene (PE), polypropylene (PP), polyester (PET), and polyvinylchloride (PVC). Extrusion films or solvent-based materials are not needed, and the solution must withstand 100–140 °C during application. Because the substrate is roll-wound, the material cannot adhere to itself at room temperature.
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