Polymer multilayers for food packaging

In coextruded polymer multilayers, several polymers are put in contact in the melt state in a specially designed die within the extruder. Once the multilayer has exited the die and cools down, it is essential for the integrity of the assembly that a good adhesion was achieved between the layers during this relatively short contact time in the melt state. In the typical food packaging application, a polar central layer acts as a barrier to oxygen and water, while the two outside layers (typically a polyolefin) impart their ductility to the assembly. Two additional tie-layers are necessary to obtain a good adhesion between the polar layer and the polyolefin. th tie-layer contains typically some modified polyolefin chains which are miscible with the polyolefin layer and can react chemically with a polar function on the center layer

More info :

Laurens, C., Ober,R., Creton, C. and Léger, L. (2004) "Crystalline Orientation and Adhesion at polypropylene/polyamide 6 interfaces compatibilized with syndiotactic polypropylene-polyamide-6 diblock copolymers". Macromolecules, 37, 6806-6813.

Laurens, C., Creton, C., Léger, L. (2004) " Adhesion promotion mechanisms at isotactic polypropylene/polyamide 6 interfaces : role of the copolymer architecture ", Macromolecules, 37, 6814-6822.

Haut de page



À lire aussi...

Coalescence of latex particles in a water-based paint

Water-based paints are actually made from an emulsion of polymer particles with a size varying between 100 and 400 nm, stabilized by surfactants. (...) 

> Lire la suite...

Mechanisms of adhesion of soft adhesives

In this area, we investigate the effect of systematic changes in the molecular structure or architecture of polymers typically used as (...) 

> Lire la suite...