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PP (polypropylene) | PVDF (Kynar®) | PTFE (TEFLON®) | PFA (TEFLON®) |
 
Need help choosing a liner? Use our Chemical Resistance search engine to match a liner type with your corrosive stream.

Plastic Liner Mechanical Properties
PP (polypropylene)
• Economical
• Good resistance to many acids and bases
• Not good for solvents
• Brittle at low temperatures
• Temperature to 225°F (110°C)
Common Industries Common Applications
  • Water Treatment
  • Chemical Processing
  • Food and Beverage
  • Steel (pickling)
  • Power Generation
  • <30% HCl
  • <90% H2SO4
  • Sea Water / Brine
  • NaOH
  • Fruit Juices
  • Ultrapure Water
  • MEK
  • Diethanolamine
 
 
PVDF (Kynar®)
• Excellent resistance to halogens and high strength acids
• Avoid pH > (11)
• Tough
• Abrasion Resistant
• High Thermal Expansion Coefficient
• Temperature to 275°F (135°C)
Common Industries Common Applications
  • Pulp & Paper
  • Chemical Processing
  • Electronic
  • ClO2
  • <90% H2SO4
  • Methyl Chloride
  • Chlorine
  • Bromine
  • 90-98% H2SO4
  • 30-35% HCl
 
 
PTFE (TEFLON®)
• Virtually inert
• Most versatile liner
• Widest temperature range
• Creeps under relatively low stress
• Not melt processable
• Temperature to 450°F (230°C) • Cryogenic up to 450°F (235°C)
Common Industries Common Applications
  • Chemical Processing
  • Pharmaceutical
  • MECl
  • Aniline
  • Epichlorohydrin
  • Nitric Acid
  • Oleum
  • Nitrobenzene
  • Ethylene Oxide
 
 
PFA (TEFLON®)
• Same performance characteristics as PTFE
• Melt processable
• Complex shapes
• Weldable
• Widely used in Electronics industry
• Expensive • Cryogenic up to 450°F (235°C)
Common Industries Common Applications
  • Chemical Processing
  • Pharmaceutical
  • MECl
  • Aniline
  • Epichlorohydrin
  • Nitric Acid
  • Oleum
  • Nitrobenzene
  • Ethylene Oxide
 
 
Teflon® Trademark

PTFE is manufactured by DuPont under the trade name TEFLON®.
TEFLON® is a trademark of DuPont. Only DuPont makes TEFLON®.

Tefzel® is a registered trademark of DuPont.

PVDF copolymer is manufactured by Elf Atochem under the trade name KynarFlex®. KynarFlex is a registered trademark of Elf Atochem.


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