Multi-layer film with enhanced lamination bond strength

Details Multi-layer film with enhanced lamination bond strength Multi-layer film with enhanced lamination bond strength

B - Operations, Transporting

32

B

B32B 27/32 (2006.01)

Patent

CA 2353893

A laminated film structure that includes a primary web having migratory additive in the first outer layer (110) and as second outer layer (130) comprising a single site catalyzed polyethylene, such as one made by a metallocene catalysis. The second outer layer can be laminated to the surface of a second web (200) without the need for treating the surface of the second outer layer with a primer or solvent. The primary web, further includes a core substrate (120) layer disposed between the two outer layers, such as biaxially oriented polypropylene layer. The resulting structures have improved bond strength between the primary web and the secondary web.

L'invention concerne une structure de film stratifiée comprenant une bande primaire présentant un additif migratoire dans la première couche extérieure (110) et une seconde couche extérieure (130) contenant du polyéthylène catalysé monosite, par exemple produit par une catalyse à alliage organométallique. La seconde couche extérieure peut être stratifiée sur la surface d'une seconde bande (200) sans qu'il faille traiter la surface de la seconde couche extérieure avec un apprêt ou un solvant. La bande primaire comprend également une couche de substrat d'âme (120) disposée entre les deux couches extérieures telle qu'une couche en propylène orientée biaxialement. Les structures obtenues présentent une meilleure résistance d'adhésion entre la bande primaire et la bande secondaire.

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