3M™ Dyneon™ Fluoroplastic PFA 6525TZ (a fully fluorinated copolymer of tetrafluoroethylene and perfluorovinylether) has exceptional heat resistance, excellent electrical properties and excellent chemical and weather resistance.
PFA 6525TZ is characterized by the following features:
broad processing window
improved stress crack resistance
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PFA 6525TZ should be processed according to the standard conditions outlined in the Dyneon PFA Processing Guideline Brochure. All machine parts coming into contact with the melt should be made from highly corrosion resistant materials – usually high-nickel alloys such as Inconel 625, Haynes 242, Hastelloy C and Reiloy. The normal chrome-nickel steels, such as 1.4571, have only limited suitability.
Processing temperatures (melt temperatures) between 360 °C and 390 °C are typical, depending on the particular process and part being produced. In injection molding, mold temperatures of up to 250 °C are required. The machine temperature control system should be as precise and responsive as possible.
PFA 6525TZ, with a Melt-Flow-Index (372 °C/5 kg) of 25 g/10 min is a material with a very low melt viscosity and is used in high shear processes like wire and cable extrusion and injection molding if the 15 MFI grade does already show signs of excessive shear in order to reach higher processing speeds.