Compare PCTFE and PTFE to identify the best option for your project

Differences Between PCTFE and PTFE

PCTFE is a fluoropolymer material with outstanding strength, stiffness, and dimensional stability. It has excellent chemical and radiation resistance and good flammability characteristics. PCTFE has a broad temperature range, good resistance to cold flow, and it has the lowest coefficient of thermal expansion of any unfilled fluoropolymer.

PTFE (polytetrefluoroethylene) is a soft, low friction fluoropolymer with outstanding chemical resistance and weathering resistance. PTFE is stable at temperatures up to 500°F and it is often used in high temperature environments. PTFE also has excellent electrical insulating properties.

PCTFE sheets and rods | PTFE sheet and rod

PCTFE Material Characteristics

PTFE Material Characteristics

• Excellent chemical resistance
• Useful temperature range: –400°F to 380°F
• Dimensionally stable, rigid, and resistant to cold flow
• Very low gas permeation and outgassing
• Near zero moisture absorption
• Radiation resistance
• Outstanding chemical resistance
• Performs well at elevated temperatures
• Extremely low friction
• Soft and formable
• Good weathering resistance

PCTFE Applications

PTFE Applications

• Seals and gaskets
• Aerospace valve seats, pump parts, impellers, diaphragms, and plugs
• Laboratory instruments
• Cryogenic and chemical processing components
• Nuclear service/high radiation exposure
• Liquid oxygen and liquid nitrogen valve lining
• Seals and gaskets
• Valve and fitting components
• Pump parts
• Scientific equipment
• Chemical resistant tubing
• Manifolds
• Semiconductor equipment
• Bearings and bushings (bearing grades)

PCTFE Common Brands

PTFE Common Brands

• Neoflon®, Kel-F®, Aclon® • Rulon®, Fluorosint®

Typical Properties of PCTFE vs. PTFE

Property Units ASTM Test
Specific gravity - D792 2.11 - 2.17 2.15
Water absorption (immersion 24 hours) % D570 0 <0.01
Tensile strength psi D638 4,860 - 5,710 1,500 - 3,000
Elongation % D638 100 - 250 100 - 200
Izod impact (notched) ft-lbs/in D256 2.5 - 3.5 3.5
Flexural strength psi D790 9,570 - 10,300 -
Flexural modulus psi D790 200,000 - 243,000 72,000
Dielectric strength (short term) V/mil D149 500 400 - 500
Coefficient of linear thermal expansion in/in/°Fx10-5 D696 3.9 8.9
Coefficient of friction (dynamic) - - - 0.1
Maximum continuous service temperature in air °F - 380 500
Hardness scale as noted D785,
Shore D 90 Shore D 55

Values may vary according to brand name. Please ask your Curbell Plastics representative for more specific information about an individual brand. 

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