Adhesion technique for incompatible polymers using modified...

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B32B 27/08 (2006.01) B32B 27/32 (2006.01) B32B 27/34 (2006.01) B32B 27/36 (2006.01)

Patent

CA 2555479

A coextrusion employing a tie layer between two layers of different polymer materials. The tie layer is formed in the extrusion melt of a composition comprising one of the two polymer materials and a coupling agent that includes functional groups that are reactive at least with functional groups on the second polymer. The coupling agent may be incorporated into the tie layer material in amounts above 5% by weight.

La présente invention a trait à une coextrusion utilisant une couche de liaison entre deux couches à base de matériaux polymères différents. La couche de liaison est formée dans la matière fondue d'extrusion d'une composition comportant un des deux matériaux de polymères et un agent de couplage comportant des groupes fonctionnels qui sont réactifs au moins avec des groupes fonctionnels sur le deuxième polymère. L'agent de couplage peut être incorporé dans la couche de liaison en des quantités supérieures à 5 % en poids.

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