Conductor insulated with foamed fluoropolymer using chemical...

H - Electricity – 01 – B

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H01B 11/00 (2006.01) H01B 3/44 (2006.01) H01B 7/28 (2006.01) H01B 7/295 (2006.01) H01B 11/02 (2006.01) H01B 13/14 (2006.01)

Patent

CA 2229292

A communications cable is provided having at least one elongate electrical conductor surrounded by a layer of insulating material, said layer comprising a chemically blown fluorinated polymer having a melting point of greater than about 480°F. The elongate electrical conductors may be provided as at least one pair of twisted wires, each wire thereof surrounded by a layer of insulating material comprising the chemically blown fluorinated polymer. The fluorinated polymer is preferably a high melting fluorinated polymer and is chemically blown by a blowing agent such as the barium salt of 5-phenyltetrazole. The communications cable includes insulated wires which possess a layer of foamed fluorinated polymer insulating material having uniform thickness and electrical properties along the length of the wire. The fluorinated polymer can be applied on the conductor in a relatively thin layer which minimizes the amount of fluorinated polymer material used to insulate the individual conductors.

Câble de communication ayant au moins un conducteur électrique allongé, entouré d'une couche de matière isolante, ladite couche contenant un polymère fluoré soufflé chimiquement dont le point de fusion est supérieur à environ 480 degrés F. Les conducteurs électriques allongés peuvent consister en au moins une paire de fils torsadés, chaque fil étant entouré d'une couche de matière isolante contenant le polymère fluoré soufflé chimiquement. Ce dernier est de préférence un polymère fluoré à point de fusion élevé et est soufflé chimiquement par un agent d'expansion tel que le sel de baryum de 5-phényltétrazole. Le câble de communication comprend des fils isolés garnis d'une couche de matière isolante en mousse de polymère fluoré dont l'épaisseur et les propriétés électriques sont uniformes sur toute la longueur du fil. Le polymère fluoré peut être appliqué sur le conducteur en une couche relativement mince qui réduit au minimum la quantité de matière polymère fluorée utilisée pour isoler chaque conducteur.

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