FR-4 vs. Teflon PTFE/FEP Machining

Comparison of FR-4 and Teflon PTFE/FEP Property Values

FR-4
0.1
45,000
2,700
0.66
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Material
Water Absorption Rating
Tensile Strength
Flexural Modulus
Coefficient of Linear Thermal Expansion
Dielectric Strength
Unfilled35% Glass Filled24% Carbon Filled
< 0.010.020.05
3,9002,1001,900
72,000190,000160,000
7.56.46.0
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Material Properties

  • Extremely high mechanical strength
  • Good dielectric loss properties
  • Good electrical strength properties
  • Machinability
  • Excellent dielectric properties
  • Inertness to most chemicals
  • High heat and chemical resistance
  • Very low coeffiecient of friction
  • Excellent radiation resistance
  • Zero moisture absorption
  • Relatively insensitive to power frequency
  • Machinability

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