Everflon+™ PF FEP can be fed directly to a conventional singlescrew extruder with nitrogen gas injection. The process contact metals must be high-nickel, low-iron alloys suitable for fluoroplastic processing. The process should include devices to monitor diameter, capacitance, and gas flow.
When adding color concentrate, use one compounded in FEP fluoroplastic. Color addition may affect cell formation and capacitance, requiring process adjustment.
Insulation performance is determined by extruder output, wire line speed, and void content. Void content is controlled by nitrogen flow rate, process tem-peratures, and quench point. It is best for the voids to grow after the melt is drawn down onto the wire. Elongated voids in the insulation indicate early growth of the cells in the draw-down cone.
Before using Everflon™ FEP resin, refer to the Safety Data Sheet and the latest edition of “The Guide to the Safe Handling of Fluoropolymer Resins”.
Open and use containers only in wellventilated areas using local exhaust ventilation (LEV). Vapors and fumes liberated during hot processing of Everflon™ FEP should be exhausted completely from the work area. Contamination of tobacco with these polymers must be avoided. Vapors and fumes liberated during hot processing that are not properly exhausted, or from smoking tobacco or cigarettes contaminated with Everflon™ FEP , may cause flulike symptoms, such as chills, fever, and sore throat. This may not occur until several hours after exposure and will typically pass within about 24 hours. Mixtures with some finely divided metals, such as magnesium or aluminum, can be flammable or explosive under some conditions.
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