Multilayer film for resealable packaging having improved resealing

1) Multilayer film comprising two thin layers D and E of a thermoplastic material bonded to one another by a continuous layer A consisting of a hot-melt pressure-sensitive adhesive composition comprising: - from 40 to 70% by weight of a composition formed of styrene block copolymers 0 consisting of...

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Bibliographische Detailangaben
Hauptverfasser:	ROBERT, Christophe, NOTTEAU, Christophe, SALLET, Ludovic
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY DYES LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL PAINTS PERFORMING OPERATIONS POLISHES SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS TRANSPORTING USE OF MATERIALS AS ADHESIVES WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:	1) Multilayer film comprising two thin layers D and E of a thermoplastic material bonded to one another by a continuous layer A consisting of a hot-melt pressure-sensitive adhesive composition comprising: - from 40 to 70% by weight of a composition formed of styrene block copolymers 0 consisting of a mixture of diblock and triblock copolymers; and - from 30 to 60% by weight of one or more tackifying resins with a softening temperature of between 5 and 140'C; said multilayer film being such that the adhesive layer A is: - connected to the layer D via a tie layer B, and 5 - connected to the layer E via a tie layer C, each of the two layers B and C being respectively composed of a composition comprising a polyethylene or polypropylene which are modified by a cyclic anhydride of an unsaturated acid having from 4 to 8 carbon atoms. 2) Process for the manufacture of said film by coextrusion. 0 3) Use of said film for the manufacture of resealable packagings.