Cable insulation compositions with enhanced rheology and...

H - Electricity – 01 – B

Patent

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Details

H01B 3/00 (2006.01) H01B 3/18 (2006.01)

Patent

CA 2535719

The present invention is a telecommunications cable comprising a plurality of electrical conductors, each conductor being surrounded by a layer of insulation comprising a coupled propylene polymer. It is preferable that the propylene polymer be an impact modified propylene polymer, more preferably an impact propylene polymer. The primary advantages of the insulation composition are realized under high-speed extrusion conditions for thin-walled insulation application, including the advantages of smooth insulation surface, good dimensional uniformity, and relatively low extrusion head and die pressures.

La présente invention concerne un câble de télécommunication comprenant une pluralité de conducteurs électriques, chaque conducteur étant entouré d'une couche isolante contenant un polymère de propylène couplé. Ce polymère de propylène est, de préférence, un polymère de propylène modifié par impact, plus préférablement un polymère de propylène à impact. Les principaux avantages de la composition isolante sont obtenus dans des conditions d'extrusion à vitesse élevée pour une application isolante à parois fines, y compris une surface isolante lisse, une bonne uniformité dimensionnelle, et des pressions de matrice et de tête d'extrusion relativement basses.

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