Multilayer conduit having a polyester layer
AssigneeEMS-Inventa AG
InventorsGeorg Stoeppelmann, Bernhard Zeh
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Abstract
A multilayer polymer hose or pipe conduit which contains at least one barrier layer of polyester, which acts as a barrier to fuel being carried thereby. In a preferred form of the invention, the hose or conduit has an inner polyamide protective layer, an outer polyamide protective layer, an adhesion promotor layer between the barrier layer and the inner protective layer, and another adhesion layer between the barrier layer and the outer protective layer.
Claims7
A multilayer, coextruded polymer hose or pipe conduit having at least one barrier layer of polybutylene terephthalate, whereby said hose or conduit exhibits a barrier effect to alcohols, aliphatic hydrocarbons, and aromatic hydrocarbons, there being at least one adhesion promoter layer adjacent at least one said barrier layer, said adhesion promoter layer comprising at least one polyurethane.
Dependencies are inferred from the claim text.