Medical device with extruded member having helical orientation

Details Medical device with extruded member having helical orientation Medical device with extruded member having helical orientation

B - Operations, Transporting

29

C

B29C 47/34 (2006.01) A61M 25/00 (2006.01) B29C 53/14 (2006.01)

Patent

CA 2456810

An elongate polymer member (10) having molecular helical orientat ion formed by rotation immediately after passing through the extrusion head (20). The elongate polymer member (100) is rotated downstream of the extrusion head (20) in the molten state prior to solidification in order to impart the molecular helical orientation. Rotating the polymer member (100) in the molten state allows the helical orientation to be imparted at the molecular level, and allows for more rotations per lineal foot of extrusion.

Cette invention concerne un élément polymère (10) allongé présentant une orientation hélicoïdale moléculaire formée par une rotation effectuée immédiatement après son passage dans la tête d'extrusion (20). L'élément polymère (100) allongé effectue une rotation en aval de la tête d'extrusion (20) alors qu'il est en fusion avant sa solidification afin de conférer l'orientation hélicoïdale moléculaire. La rotation de l'élément polymère (100) en fusion permet à l'orientation hélicoïdale d'être conférée au niveau moléculaire, et permet à un plus grand nombre de rotations d'être effectuées par pied linéaire d'extrusion.

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