Laminating adhesives are used for large-area bonding of individual foils and films to form PET/PE veya PET/AL/PP gibi laminatlar. Tek tek folyoların ve filmlerin özellikleri, laminatın, örneğin gıda maddeleri, sağlık hizmetleri, tıbbi veya farmasötik ürünler veya ürünler gibi malların ambalajlanması için bir ambalaj malzemesi olarak daha sonra kullanım için uygun olacak şekilde birleştirilir. ilk kullanımdan önce hasara karşı korunmaya ihtiyaç duyar.
Laminasyon yapıştırıcıları most often consist as a rule of isocyanate group-containing polyurethane binders. Most of the available laminating adhesive give, after cross-linking, are transparent appearance.
Yasal düzenlemeler nedeniyle çok sınırlı sayıda hammaddeye izin verilir veya kullanım için uygundur.esnek ambalaj yapıştırıcıları. Besides their damage to the environment because of the high content of volatile organic solvents, the necessity of high energy consuming drying tunnels to flash-off those solvents to achieve the demanding prooperties, even the necessary adhesive lay down needed for the production of the laminates is about two times higher than the lay down regarding solvent-free adhesives. The laminating adhesive must also be resistant to an effect called "tunneling". which is the localized separating or delamination of the substrates caused by two films of different extensibility that stretch or relax at different rates. Other general considerations in selecting an adhesive for lamination include adhesion, mechanical bond strength, formulating flexibility, and heat and chemical resistance. One must also determine the ability of the adhesive to flow uniformly over the film's surface and form a smooth continuous coting.
