TO VALIDATE THE CURING TIME FOR DIFFERENT LAMINATE STRUCTURES

Abstract

Bonding has become an indispensable technique for joining two or more substrates with each other, not only in industry but also in everyday life. Bonding allows the production of laminated materials, facilitates mobility and communications, positively influences the handling of foods, supports health and hygiene and improves the quality of our lives. Depending on the application, an adhesive may have to withstand extremely low temperatures or heat of several hundred degrees, it may have to be highly elastic or extremely stable. Flexible packaging laminates are being manufactured by printing and laminating the transparent, opaque or metallised films of PET, PP, HDPE, LLDPE, PVC, Paper, Aluminium Foils etc. Various type of adhesives are being used for laminating these films but Polyurethane adhesives are most popular. In flexible packaging, mostly Two Part Polyurethane adhesives are used. Adhesive is mixed with the hardener to ensure the crosslinking and curing and solvent is used as a...