PFA
Perfluoroalkoxy Alkane
Glass Transition (Tg)
~-5 °C
Melting Point (Tm)
~305 °C
Density
2.15 g/cm³
CAS Number
26655-00-5
Recycling Code
♺ 7
Category
High-Performance
Repeat Unit
–[CF₂–CF₂]ₓ–[CF₂–CF(O–C₃F₇)]ᵧ–
The repeating unit is the smallest structural fragment whose repetition builds the whole chain. Subscripts show the relative share of each unit in copolymers.
Key Properties
Melt-processable with essentially PTFE-level chemical resistance and higher service temperature than FEP; ultra-high purity grades available.
Applications
Semiconductor fluid handling, high-purity tubing, lined vessels.