Transcription of Comparison Between PTFE and PFA Processing
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Comparison Between PTFE and PFA Processing
Comparison Between ptfe and PFA Processing For a number of years fluoropolymers have played a significant role in the chemical and similar industries to protect plants and equipment against chemical attack by a broad range of aggressive media. This is because they offer substantially better chemical resistance and thermal stability than other plastics or elastomeric materials. Following the development of ptfe , the introduction of melt-processable fluorinated ethylene-propylene (FEP) in 1960 opened up entirely new application areas. PFA, a perfluoro-alkoxy polymer which has been in successful use for 20 years as a lining material, is now a thermoplastic successor to ptfe , with equivalent thermal and chemical resistance and superior properties with respect to processability, translucency, permeation resistance and mechanical strength. In the chemical industry, both fluoropolymers - ptfe and PFA - are used mainly in the form of linings (fig. 1, 2). For simple shapes, such as pipes, bends, T-pieces or reduction joints, ptfe is generally used; it is applied by means of paste extrusion, ram extrusion or tape wind-ing (fig.)
Comparison Between PTFE and PFA Processing. For a number of years fluoropolymers have played a significant role in the chemical and similar industries
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