Patent ID: 6939593

Claim:
A medical tube for inserting into the human body, comprising: a tube comprising first, second, and third layers, in which the first layer is formed between the second and third layers, wherein the first layer is formed of a first material comprising a thermoplastic polymer comprising a co-polymer, wherein the copolymer is a fluoro copolymer chosen from the group consisting of a copolymer of tetrafluoroethylene with a perfluoroalkyl vinyl ether, a copolymerization of tetrafluoroethylene and perfluoromethylvinylether and a fluorinated ethylene-propylene resin, and a second layer is formed of a second material having a melt temperature, wherein the second material is a melt-processible poly(tetrafluoroethylene) composition, the melt-processible poly(tetrafluoroethylene) composition having a melt flow index value greater than 0 and less than 2.5 g/10minutes, and a third layer is formed of a third material having a melt temperature, wherein the third material is a melt-processible poly(tetrafluoroethylene) composition, the melt-processible poly(tetrafluoroethylene) composition having a melt flow index value greater than 0 and less than 2.5 g/10minutes, wherein the third layer is in direct contact with the first layer and wherein the first layer, the second layer, and the third layer are co-extruded at a temperature at or above the melt temperatures of the second and the third materials.