Heat Seal Coatings: Formulation Play An Important Role In Many Packaging Application
Heat Seal Coatings Heat Seal Coverings play an important role in many packaging applications by forming strong, reliable seals between films, foils and other substrates. These coatings fuse under application of heat and pressure to create seamless bonds that protect products and extend shelf life. In this article, we will explore the formulation of Heat Seal Coverings and how they are applied. Composition and Chemistry Heat Seal Coatings are engineered polymer formulations that typically contain a resin, plasticizer and other additive compounds. The resin, which makes up the largest percentage by weight, provides the structural integrity and adhesion properties. Common resins used include ethylene-vinyl acetate (EVA), polyurethane (PU), polyolefin, and polyester. Plasticizers are added to the resin to increase flexibility and reduce the melting point, allowing the coating to fuse at lower temperatures. Common plasticizers include esters of phthalic or adipic acid. Additives such a...