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What is the different between Kel-F and PCTFE?

June 14, 2021

What is Kel-F?

Kel-F® was a trade name for PCTFE (polychlorotrifluoroethylene) utilized by the 3M® Company. In 1995, 3M sold the rights to Daikin® Industries, Ltd, who produces the raw material today under the trade name Neoflon®. PCTFE with the brand Kel-F is no longer available in the marketplace.

What is Neoflon PCTFE M-400H?

Neoflon PCTFE M-400H is a fluoropolymer that has high tensile strength, dimensional stability, and retains its high-performance properties over a large temperature range (-400° to 380°F). This grade of PCTFE has superior mechanical characteristics and gas barrier properties to PFA and FEP. PCTFE is melt-processible, and can be extruded or molded into sheets, rods or tubes.

What are the Benefits & Advantages of PCTFE?

  • Excellent thermal and chemical stability
  • Low gas permeation and outgassing
  • Very low moisture absorption and permeation
  • Highly resistant to cold flow
  • Very rigid and tough
  • Excellent dimensional stability
  • Extremely good low temperature properties to -400°F
  • High chemical-resistance
  • Resistant to oxidation
  • High compressive strength
  • Non-flammable
  • Radiation-resistant

What Types of Products can be Manufactured from PCTFE?

  • Lip seals
  • Valve seats & stems
  • O-Rings
  • Gaskets
  • Washers
  • Sleeve & thrust bearings
  • Bushings
  • Liner for chemical applications
  • Impellers
  • Diaphragms & plugs

What Applications are Products Made of PCTFE Used In?

  • Cryogenic and chemical processing components
  • Seals and gaskets
  • Aerospace valve seats, pump parts, impellers, diaphragms and plugs
  • Laboratory instruments
  • Nuclear service / high radiation exposure
  • Liquid oxygen and liquid nitrogen valve linings