Abstract: The present invention discloses two multilayer coolant fluid transport tube constructions, a three-layer and a two-layer design, produced by a melt co-extrusion process for electric vehicle thermal management applications. The three-layer coolant fluid transport tube presented in this invention was designed for a maximum continuous use temperature of 125 degrees Celsius, comprising a polyamide jacket, a middle adhesive layer and an impact modified polypropylene copolymer inner layer. Also presented in this invention is a two-layer coolant fluid transport tube with a maximum continuous use temperature of 105 degrees Celsius, which incorporates a polypropylene copolymer inner layer and a thermoplastic vulcanizate outer layer.

Abstract: A fluid transport tube and method for forming including either of a monolayer or multiple layers and having a polymer or copolymer which is formed into a circular cross sectional profile and with a Graphene material included in the layer. The Graphene material further includes any graphene derivative not limited to single layer Graphene, few layered Graphene, Graphene oxide and reduced Graphene oxide. Versions of the tube can further include inner and outer layers, between which at least one barrier layer is provided. Any of a polyamide 12 (PA 12) or polyamide 612 (PA 612) can be incorporated into the layer for increased environmental barrier resistance.