PVC-free multilayered tube for medical uses, method for its manufacture and use

2.1 Known PVC-free multilayer tubes (1) for medical purposes have at least two layers, of which a base layer A) (3) of a first plastic material having at least one connection layer B) (4) is connected from a second plastic material. These known structures require either bonding agent to ensure a firm bond between the layers, or can be connected only in a complex manner with bags, fittings or connectors.2.2 According to the invention a firm adhesion between the layers and an easy formation of a firm and tight connection with bags or connectors of polypropylene or polycarbonate, in a steam sterilization procedure achieved in that the first plastic material comprises at least one polymer, if its dimensional stability at temperatures ≥ 121 ° C is, while the second plastic material comprises at least one polymer whose dimensional stability is no longer ensured at temperatures ≥ 121 ° C. Optionally a layer C) (2) is present, the plastic material comprises at least one polymer whose dimensional stability is given at temperatures ≥ 121 ° C.2.3 Use for medical purposes, in particular as a fluid-carrying line in dialysis, infusion or artificial feeding, especially with connectors or medical bags in connection technology.