EXTRUDABLE HOT-MELT PRESSURE-SENSITIVE ADHESIVES FOR RESEALABLE PACKAGING HAVING IMPROVED ORGANOLEPTIC PROPERTIES.

摘要

Hot-melt pressure-sensitive adhesive composition with MFI of 0.01 to 200 g/10 minutes containing: 45 to 70% by weight of styrene block copolymers of SIS type with an SI diblock content of 30 to 90% and a content of styrene units of 10 to 40%; and 30 to 55% by weight of a tackifying resin having a softening temperature of 5 to 150 DEG C., and obtained by a process containing: polymerizing a composition (i) essentially composed of unsaturated hydrocarbons having 9 carbon atoms, or a composition (ii) essentially composed of dicyclopentadiene and of its derivatives having 10 carbon atoms; then hydrogenating the polymer. Multilayer film containing an adhesive layer composed of the composition with a thickness of 7 to 50 [mu]m. Process for making the film by coextrusion. Using the said film for resealable cartons.