PCTFE (polychlorotrifluoroethylene) is a thermoplastic chlorofluoropolymer with the molecular formula (CF2CCIF)n. It is chemically related to PTFE (polytetrafluoroethylene) and it has the lowest water vapor transmission rate of any plastic. Other names for PCTFE are Kel-F® (a product from 3M) or Neoflon® (a product of Daikin Industries).

PCTFE’s most striking property is its capability to operate and maintain its elasticity at extremely low temperatures. It also has one of the highest limiting oxygen index. Because PCTFE is a highly fluorinated resin, it is non-flammable and resists most corrosive chemicals. It exhibits properties like zero moisture absorption and non-wetting. It does not absorb visible light. PCTFE also maintains its outstanding electrical-insulating capability through thermal cycling and in high-humidity environments.

PCTFE’s high compressive strength and dimensional stability make it a good choice for structural material. Its low outgassing rate and permeability is used in instrumentation, laboratory, aerospace and flight applications.

Key properties
  • Dimensional stability
  • High resistance to cold flow
  • Excellent chemical resistance
  • Transparent and colored
  • Near zero moisture absorption
  • Non-flammable
  • High rigidity (difficult to deform)
  • Radiation resistance
Applications
  • Cryogenic applications
  • Protection of LCD panels (sensitive to moisture)
  • Film for food and pharmaceutical packaging
  • Valves and seals
  • Protective barrier against chemicals
  • Laminating other polymers (PVC, PP)

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