Ultra High Purity Materials

Fluoroplastics  These plastics all contain fluorine which is highly electro negative making them inert and chemical resistant They also tend to handle high temperatures and are very pure.

  • PVDF (Polyvinylidene Fluoride)  The most commonly used fluoropolymer. It has a high level of purity, excellent chemical resistance and a temperature capability of up to about 250 degrees F. It is frequently used for strong acids, solvents and in the handling of DI water. It is not recommended for caustics.
  • ECTFE (Ethylene Chlorotrifluoroethylene)  ECTFE is similar to PVDF in its chemical resistance and has somewhat improved resistance to caustic and chloride environments. It exhibits excellent melt processing properties and has the lowest coefficient of expansion of any of the fluorinated materials, making it a good selection for high thermal cycling environments.
  • ETFE (Ethylene Tetrafluoroethylene) - is a partially fluorinated thermoplastic. It is resistant to most chemicals except concentrated oxidizing acids at elevated temperatures, alkali amines, certain organic solvents, alkali metals at ambient temperature, fluorine at elevated temperatures, and certain halogenated compounds.
  • PTFE-M (Polytetrafluoroethylene) Is similar to PTFE but is chemically modified with perfluoropropyl vinyl ether to make it melt flow processable. It is chemically resistant to virtually all chemicals except alkali metals and fluorine at elevated temperatures. PTFE-M is also less permeable then PTFE, making it the material of choice for the most severe, highest temperature corrosive environments. Available as a bonded sheet lining with a maximum service temperature of 230°F.
  • FEP (Fluorinated ethylene propylene)  A fully fluorinated thermoplastic which is chemically inert. FEP is subject to attack at ambient temperature by alkali metals, alkali metal organics and fluorine.
  • PFA (perfluoroalkoxy) The most chemically inert of all the fluorinated materials. PFA is very similar in composition to PTFE and FEP (fluorinated ethylene-propylene). PFA and FEP both share PTFE’s useful properties of low coefficient of friction and non-reactivity but are more easily formable.

Please contact us for any of your ultra high purity material questions or issues.