Abstract:

In the extrusion processing of medical catheter, supporting tubes were inserted into the die, so as to produce composite catheters more easily. This novel technique was suitable for the extrusion of different kinds of materials, especially materials with large difference of melting point. The supporting tube could be of varying diameter and shape, multi-cavity. The minimum inner-diameter could be less than 0.2 mm. A variety of medical catheters could be produced with this technique.