METHOD FOR MAKING THE MULTILAYER SKIRT OF A FLEXIBLE TUBE HAVING A BARRIER EFFECT LAYER WITH HOLOGRAPHIC PATTERNS

摘要

The invention concerns a method for producing the multilayer skirt of a flexible tube comprising a barrier effect layer with holographic patterns characterised in that it consists in using a structure with holograms comprising a support layer with high mechanical characteristics and good barrier properties, preferably an aromatic polyester, a vinyl alcohol ethylene copolymer, a polyamide, an aliphatic polyketone or orientated polypropylene and in producing by extrusion laminating a multilayer plastic strip comprising said structure with holograms and unilayer or multilayer external plastic structures, said support layer being bonded to one of said external structures by a film of adhesive material such as an ethylene-acrylic acid copolymer (EAA) or an ethylene-methacrylic acid or maleic anhydride (EMA), preferably an ethylene-methacrylate terpolymer, comprising acid or anhydride functions, with Vicat point less than 55 DEG C. The invention also concerns the strip for producing the skirt resulting from this method.