What the materials cover

These presentation documents cover sealant layers and sealing films for flexible film packaging. They describe typical heat-seal layer systems and their properties, explain additives and test methods, and outline the sealing processes of heat contact, impulse and ultrasonic sealing. Further topics include the basics of polymer chemistry relevant to sealing, peeling as an alternative to permanent sealing, requirements for film packaging, and a systematic approach to film formulation. The documents suit professionals in production, development, packaging technology, quality assurance, purchasing, sales and marketing who want to refresh or deepen their knowledge.