Patent ID: 9470355
Filing Date: 2016-10-18
CPC Classification: B29C,B29D,B29L,B32B,F16L,Y10T

Claim Text:
1. A tube or semi-finished tube, in particular for chemical apparatus construction, for storing or for transporting aggressive storage media, comprising a solid inner tube with the inner side of which the storage medium can come into contact and which is made of a thermoplastic that is chemically resistant to the storage medium, and comprising an adhesion-promoting layer applied to the outer side of the inner tube, which has a textile structure and is made of a thermoplastic, the textile structure of the adhesion-promoting layer being suitable for mounting a support tube on the outer side of the adhesion-promoting layer, wherein the outer side of the inner tube and the inner side of the adhesion-promoting layer are welded together in a material-bonded manner, the textile structure being preserved on the outer side of the adhesion-promoting layer, wherein the adhesion-promoting layer is formed by a textile material strip that is wound or rolled onto the outer side of the inner tube or by a covering material hose, wherein the inner tube comprises at least two coextruded material layers made of a thermoplastic, the at least two coextruded material layers comprising at least an inner material layer and an outer material layer, wherein the thermoplastic of the outer material layer of the inner tube has a lower viscosity than the thermoplastic of the inner material layer of the inner tube.