| abstract |
The present invention relates to plenum cables jacketed with a composition comprising perfluoropolymer and inorganic char-forming agent, which passes the NFPA-255 burn test, and to preferred compositions for forming the jacket on such cables and other melt-fabricated articles, wherein hydrocarbon polymer is also present in the composition, and to these same compositions which may include other inorganic particulate filler and provide improved ink-printability on the melt-fabricated article surface, and to extrusion conditions, notably extrusion at low temperatures (271°C to 343°C) and at a draw ratio balance less than 1, that enable the cable jacket to be extrusion-formed at a line speed of at least 91.5 m/min. |