| 摘要 |
Multilayer film comprises at least two thin layers of material bonded together by a layer of thickness of not exceeding 10 mu m, and an adhesive composition comprising 30-70% of a mixture of styrenic block copolymers, 5-75% of a triblock copolymer having e.g. styrene-isoprene-styrene, and 25-95% of a diblock copolymer comprising e.g. styrene-isoprene, where the content of global styrenic unit of the mixture is 10-40%, and 30-70% of at least one tackifying resins. Multilayer film comprises at least two thin layers of material bonded together by a layer of thickness of not exceeding 10 mu m, and an adhesive composition comprising 30-70% of a mixture of styrenic block copolymers 5-75% of a triblock copolymer comprising styrene-isoprene-styrene, styrene isoprene butadiene, styrene butadiene styrene, styrene ethylene butylene styrene, and styrene-ethylene-propylene-styrene block copolymer, 25-95% of a diblock copolymer comprising styrene-isoprene, styrene-b-butadiene-b-isoprene, styrene isoprene butadiene, styrene butadiene, styrene-ethylene-butylene, and styrene ethylene propylene, where the content of global styrenic unit of the mixture is 10-40%, and 30-70% of at least one tackifying resins. An independent claim is included for a process for continuous preparation of multilayer film comprising a step of coating by the adhesive composition of a first thin layer of material, in which the composition, pourable by heating at a suitable temperature, is extruded by a coating device without contacting with the thin layer, in the form of a substantially continuous layer, which is then contacted with the surface of the thin layer, then a step of laminating a second thin layer, on the first coated thin layer produced in coating step. |
