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1、Fluoro-thermo-plastic Wire Extrusion coating,Per Nelson Erik Peters Dyneon LLC,Topics,Polymers Conductor Payoff Sizing/cleaning Preheating Extruder Crosshead Tooling Cooling Gauges Troubleshooting,Dyneon FEP, PFA, ETFE, THV,Polymer uses,Polymer line speeds,Payoff,Options Flier Roll-off Inline draw,F
2、low stability is crucial back tension after flier tension brake,Sizing/cleaning (solid conductors),Introduces tension to line Cleans copper surface Improved copper surface; improved electrical transmission,Copper Preheating,Indicators High preheat Voided inner surface Smooth outer surface Better adh
3、esion strip Low preheat Rough outer surface Poorer adhesion,Recommendations Temperature guidelines FEP/PFA100-180 C ETFE/THV 50 C Depends on linespeed Measurement Paper good comparative test universal,Extruder,Extruder specs L/D 24-34:1 Saxton mixing 2-4 x diameter Close heat control necessary for a
4、 stable process corrosion protected material nickel alloy Extruder needs to have at least 400 C maximum temperature,Crosshead,Specs Fixed or adjustable center Corrosion protected material construction Coex/single extrusion possible,Tubing,Why tube extrusion?,Melt fracture,Smooth surface,Shark skin,E
5、xtruded film,Tubing,Tooling,Tooling calculations,DDR= (DD-DT)/(dCC-dW) DRB= (DD/dCC)/(DT/dW),Cone,Indicators Too long Diameter variation Unstable Too short surface roughness sparks/pinholes cone breaks Unstable Tip and die not concentric Core not centered Melt too hot or cold Line speed too high,Rec
6、ommendations 30-40 mm,Cooling Trough,Capstan,Cold water spray typical Grooved sheaves preferable over stationary guides,Gauges/Indications,Line tension gauge of instability Identify conductor damage Inner (copper) diameter copper size and quality Capacitance crucial for foam adhesion problems eccent
7、ricity problems diameter problems,Gauges/Indications,Outer diameter Product size Long-term variation ovality Eccentricity Copper center Lump/neckdown Short term variation Spark tester holes, thin spots,Troubleshooting,Troubleshooting,Troubleshooting,Troubleshooting,Troubleshooting,Many Thanks:,Erik Peters Dyneon, Gendorf Kerkrade,
