Patent ID: 8124208

Claim:
A multi-layer tube comprising a barrier layer consisting of laminated fluoro resin, and at least one outer layer, the barrier layer having a thickness no greater than 20% of the average thickness of the multi-layer tube wherein the fluoro resin constituting the barrier layer consists of a homo polymer of chlorotrifluoroethylene having a surface tension higher than or equal to 30 dyne/cm, a melting point no greater than 220° C., a melt flow rate (MFR) between 0.1 and 10 g/10 min at a temperature of 230° C., and a tensile modulus between 750 and 1500 MPa, the outer layer consisting of a styrene elastomer having a tensile modulus of between 7 and 40 MPa and a tensile yield strength between 0.5 and 5 MPa, the barrier layer and the outer layer being integrally laminated with each other by forming the barrier layer and the outer layer in a co-extrusion manner with an adhesive resin being interposed between the barrier layer and the outer layer.