Laminating adhesives are used for large-area bonding of individual foils and films to form PET/PE yoki PET/AL/PP kabi laminatlar. Alohida folga va plyonkalarning xususiyatlari shunday birlashtirilganki, laminat keyinchalik tovarlarni qadoqlash uchun qadoqlash materiali sifatida foydalanish uchun mos bo'ladi, masalan, oziq-ovqat, sog'liqni saqlash, tibbiy yoki farmatsevtika buyumlari yoki buyumlari. birinchi foydalanishdan oldin shikastlanishdan himoya qilish kerak.
Laminatsiyalash uchun elimlar 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.
Huquqiy qoidalarga ko'ra, juda cheklangan miqdordagi xom ashyolarga ruxsat berilgan yoki ulardan foydalanishga yaroqlimoslashuvchan qadoqlash yopishtiruvchi moddalar. 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.
