Production of uhmwpe panels

Details Production of uhmwpe panels Production of uhmwpe panels

B - Operations, Transporting

29

C

B29C 47/86 (2006.01) B29C 47/14 (2006.01) B29C 47/54 (2006.01)

Patent

CA 2655616

UHMWPE panels of large width may be prepared by a continuous ram extrusion process by employing a slit die which preferably narrows from both sides in a direction transverse to the machine direction, and/or which employs a plurality of transversely positioned cooling zones located on the top and the bottom of the die, proximate the exit thereof. The panel exits the die at a temperature lower than the crystalline melt temperature.

La présente invention concerne des panneaux UHMWPE, de grande largeur, pouvant se préparer grâce à un procédé continu d'extrudo-sintérisation qui utilise une filière à fente, rétrécissant de préférence des deux côtés dans une direction transversale à celle de la machine, et/ou qui emploie une pluralité de zones de refroidissement disposées transversalement sur les parties supérieure et inférieure de la filière, à proximité de sa sortie. Le panneau sort de la filière à une température inférieure à celle de la fusion cristalline.

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