Properties and types of fluoroplastics (Teflon)

Properties and types of Fluoroplastics (Teflon)

Basic information about fluoroplastics

Types of fluoroplastics


PTFE (polytetrafluoretylen)

  • extremely low friction coefficient
  • high temperature resistance (up to +260°C)
  • high chemical resistance
  • excellent non-stick properties
  • may be used in contact with food

PFA (perfluoralkoxy - copolymer of tetrafluoroethylene and a perfluorinated vinyl ether)

  • excellent chemical resistance
  • high temperature resistance (up to +260°C)
  • excellent non-stick properties
  • FDA certificate, UV stable, weldable

FEP (fluorinated ethylene - propylene)

  • excellent chemical resistance
  • high temperature resistance (up to +205°C)
  • excellent non-stick properties
  • high resistance to puncture with electrical current
  • very low coefficient of friction

ETFE (ethylene-tetrafluoroethylene copolymer)

  • excellent chemical resistance
  • high temperature resistance (up to +205°C)
  • excellent non-stick properties
  • allows a layer of thickness up to 7 mm
  • most durable of all fluoroplastics

These types of fluoroplastics (Teflon) are used by our customers as a surface treatment of their parts. The properties of Teflon play an important role in the chemical, food and printing industry etc. The choice of a proper type of fluoroplastics (Teflon) always depends on the specific requirements by our customers - the way of use, the working conditions etc.

Properties of fluoroplastics

General Standard
Unit PTFE PFA FEP ETFE
Density ISO 1183 g/cm3 2.14 - 2.19 2.12 - 2.17 2.12 - 2.17 1.71 - 1.78
Working temperature
°C 250-260 250-260 200-205 150-180
Combustibility Non-flammable Non-flammable Non-flammable Non-flammable
Absorption (water at 23°C)
% <0.05 <0.05 <0.05 <0.05
Thermal Standard
Unit PTFE PFA FEP ETFE
Melting Point ASTM 2116 °C 327 300-310 253-282 265-275
Coefficient of thermal expansion DIN 52612 10-5*K-1 10-16 10-16 10-14 8-12
Thermal conductivity (at 23°C) W/K*m 0.23 0.22 0.20 0.23
Mechanical Standard
Unit PTFE PFA FEP ETFE
Tensile strength
ISO 527 N/mm² 29-39 27-32 19-25 36-48
při 150 °C
14-20 15-21 4-6 8-12
Lenghtening at 23 °C
ISO 527 % 200-500 300 250-350 200-500
Hardness (Rockwell) ISO 2039 20-30 25-35 20-30 45-55
Electrical Standard
Unit PTFE PFA FEP ETFE
Dielectric constant
D150 1 MHz 2.1 2.1 2.1 2.6
Dielectric strength

D149 V/µm 18 53 80 79
Scattering factor
D150 1 MHz <0.0001 <0.0006 <0.0001 <0.007
Resistance to el. arc D495 sec > 300 > 300 > 300 > 300