Polyamide or polyester- and aluminium multilayer tube for...

B - Operations – Transporting – 32 – B

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Details

B32B 1/08 (2006.01) B32B 15/08 (2006.01) B32B 15/20 (2006.01) B32B 27/32 (2006.01) B32B 27/34 (2006.01) B32B 27/36 (2006.01) F16L 11/04 (2006.01) F16L 11/14 (2006.01)

Patent

CA 2465243

The present invention relates to a multilayer tube comprising, in its radial direction from the outside inwards: an outer layer formed from a polyamide or a polyolefin or a polyester, a layer formed from a binder, a layer of aluminium, a layer formed from a binder, an inner layer in contact with the petrol, chosen from: blends of polyamide and polyolefin with a polyamide matrix, polyamides comprising at least one product chosen from plasticizers, copolymers having polyamide blocks and polyether blocks and EPR-type modifiers, polyesters, the layers being successive and adhering to one another in their respective contact region.

Cette invention se rapporte à un tube multicouche comprenant, dans sa direction radiale de l'extérieur vers l'intérieur : une couche externe formée à partir d'un polyamide ou d'une polyoléfine ou d'un polyester, une couche formée à partir d'un liant, une couche d'aluminium, une couche formée à partir d'un liant, une couche interne en contact avec un dérivé du pétrole, choisie parmi des mélanges de polyamide et de polyoléfine avec une matrice polyamide, des polyamides contenant au moins un produit choisi parmi des plastifiants, des copolymères contenant des blocs polyamide et des blocs polyéther et des modificateurs de type EPR, et des polyesters. Ces couches se succèdent et adhèrent l'une à l'autre dans leur zone de contact respective.

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