Method for making tubing

Details Method for making tubing Method for making tubing

B - Operations, Transporting

29

C

B29C 47/20 (2006.01) A61M 25/00 (2006.01) B29D 23/00 (2006.01)

Patent

CA 2347024

A method for making differential stiffness tubing for medical products, such as catheters. The method produces a tubing that has a stiff section and a flexible section joined by a relatively short transition section in which the materials of the stiff and flexible sections are wedged into each other in a smooth gradual manner to produce an inseparable bond between the materials without abrupt joints. The method also employs a resin modulating system that minimizes the length of the transition section by minimizing the volumes in all flow channels of the coextrusion head used to produce the tubing.

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