Biaxially oriented multilayer polymer tube for medical devices

Details Biaxially oriented multilayer polymer tube for medical devices Biaxially oriented multilayer polymer tube for medical devices

B - Operations, Transporting

29

C

B29C 47/24 (2006.01) A61M 25/00 (2006.01) B29C 47/06 (2006.01)

Patent

CA 2452303

A tubular extruded member (10) particularly suitable for use in medical devices such as intravascular catheters and guide wires, wherein the extruded tubular member (10) includes multiple layers having biaxial helical orientation in different directions. A counter-rotation extrusion process may be used to orient the layers in different biaxial helical directions. The counter-rotation extrusion process provides orientation in two different circumferential directions in addition to a longitudinal directionl. By combining the dual direction or biaxial helical orientation with multiple layers, different layers of the tubular member may be tailored to have the desired mechanical properties.

L'invention porte sur un élément tubulaire extrudé (10) particulièrement utilisable dans des instruments médicaux tels que des cathéters intravasculaires ou des fils-guides, et comportant plusieurs couches à orientation hélicoïdale biaxiale dans différentes directions. On peut utiliser un procédé d'extrusion à contre rotation pour orienter les couches. Ledit procédé produit une orientation dans deux directions circonférentielles plus une orientation dans la direction longitudinale. En combinant la double direction ou l'orientation hélicoïdale biaxiale, avec les multiples couches, on peut individualiser les couches pour obtenir les propriétés mécaniques désirées.

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