TEFLON Main Properties

【TEFLON Main Properties】

  • Antistick properties.
  • Resistance almost all corrosive chemicals except fluorine , some fluorochemicals and molten alkali metals.
  • wide temperature use range (-200。C ～ +260。C)
  • Very low coefficient of friction.
  • Non flammable.
  • Long life without ageing problem.
  • Excellent dielectric properties.
  • Good mechanical properties.

Characteristic Unit ASTM TEST PTFE FEP PFA ETFE ECTFE PVDF TFM
Physical performance Melting point ℃ - 327 275 310 270 220-245 156-178 327
Proportion   D792 2.14-2.20 2.12-2.20 2.12-2.17 1.70 1.68-1.69 1.75-1.78 2.16-2.19
Mechanical behavior Tensile strength kgf/cm² D638 140-350 190-220 280-300 460 420 250-510 250-350
Elogation % D638 200-400 250-330 300 100-400 200-300 12-430 250-450
Compression strength kgf/cm² D695 120 155 - 500 - 460-980 160
Impact strength kgfcm/cm D256A 16.3 OK OK OK OK 16.3-38.1 -
Rockwell hardness - D785 - - - R50 R93-95 R77-83 -
Shore hardness - D2440 D50-55 D60-65 D64 D75 D55 D75-77 D58
Bending elasticity 103kgf/cm² D790 5.6 5.6-6.7 8.4 14 6.7-7.0 20.4-25.3 -
Tensile Elasticity 103kgf/cm² D638 4.1-5.6 3.5 - 8.4 16.8 10.2-30 -
Coefficient of dynamic friction - 7kgf/cm²
3m/min		 0.10 0.3 0.2 0.4 - 0.39 0.18
Electrical performance Volume resistivity Ω-cm D257(50%RH.23℃) >1018 >1018 >1018 >106 1015 2×1014 >1018
Insulation damage strength(short time) kv/mm(3.2mm) D149 19 20-24 20 16 20 16 19
Permittivity 60HZ - D150 <2.1 2.1 <2.1 2.6 2.6 2.6 <2.1
103HZ - D150 <2.1 2.1 <2.1 2.6 2.6 2.6 <2.1
106HZ - D150 <2.1 2.1 <2.1 2.6 2.6 2.6 <2.1
Dielectric loss tangent 60HZ - D150 <0.0002 <0.0002 <0.0002 <0.0006 <0.0005 <0.0006 <0.0002
103HZ - D150 <0.0002 <0.0002 <0.0002 <0.0008 <0.0015 <0.0008 <0.0002
106HZ - D150 <0.0002 <0.0005 <0.0003 <0.005 <0.015 <0.005 <0.0002
Arc resistance sec D495 >300 >300 >300 75 18 75 >300
Durability Drug resistance - D543 superb superb superb superb GOOD GOOD superb
Combustibility - D635 Not burning Not burning Not burning Not burning Not burning Own digestion Not burning

Water absorptivity 24H

 % D570 <0.01 <0.01 <0.03 <0.029 <0.01 <0.04 <0.01
Thermal performance Thermal coefficient 10-4cal/cm²sec℃ C117 6.0 6.0 6.0 5.7 3.8 2.4-3.1 6.0
Specific heat cal℃/g - 0.25 0.28 0.25 0.46-0.47 - 0.33 0.25
Coefficient of linear expansion 10-4/C D696 10 8.3-10.5 12 5.9 8 7-14 12
Spherical pressure temperature ℃ - 180 170 230 185 - - -
Heat distortion temperature 18.5kgf/cm² ℃ D648 55 50 47 74 77 54-115 -
4.6kgf/cm² ℃ D648 121 72 74 104 116 138 -
Maximum service temperature(continuation) ℃ - 260 204 260 150-180 165-180 150 260