Structure comprising at least one polyethylene layer and at...

Details Structure comprising at least one polyethylene layer and at... Structure comprising at least one polyethylene layer and at...

B - Operations, Transporting

32

B

B32B 27/32 (2006.01) B32B 33/00 (2006.01) B65D 65/40 (2006.01)

Patent

CA 2519734

A structure successively comprising: a layer of barrier polymer, a tie layer comprising, the total being 100%: 1 to 80% of at least one polyethylene carrying epoxy functional groups, 99 to 20% of at least one viscous polymer compatible with the polyethylene carrying epoxy functional groups, a polyethylene layer, and optionally another tie layer and a layer of barrier polymer, the layers adhering in their respective contact zones. According to one alternative form of the invention, if the viscous polymer compatible with the polyethylene carrying epoxy functional groups is a polyethylene and if the blend of this viscous polyethylene compatible with the polyethylene carrying epoxy functional groups has sufficient mechanical strength to be able to be coextruded with the barrier polymer, then it is possible to dispense with the polyethylene layer which is adjacent to the tie layer. This structure is of use in preparing devices for the storage or transfer of fluids, in particular in motor vehicles. The invention also relates to these devices. These devices can be pipes, tanks, bottles or containers in which the layer of barrier polymer is in contact with the stored or transported fluid. These structures can comprise other layers composed of other materials.

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