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PTFE Detailed Properties


(Polytetrafluoroethylene)

The table below lists a generally accepted summary of properties that we believe to be reliable.   Please note that many of these resins are produced in several varieties and property characteristics may vary.  Therefore, determination of resin is dependent on the application and this table is only meant to serve as a general guideline.    

 

PTFE Properties ASTMUNIT PTFE
MECHANICAL PROPERTIES
Specific GravityD792  2.18
Elongation D638 %200~450
Tensile Strength D638 psi2,000~7,000
Flexural StrengthD790 psino break
Compressive StrengthD695  3,500
Tensile Elastic Modulus 
(Young's Modulus) 
D638 psi 57,000
Flexural Modulus D790psi 71,000~85,000
D790103MPa
(103kgf/cm2
0.5-0.6
(5.0-6.0)
Flex Life D2176(MIT Cycles) >1,000,000
Hardness Durometer  D636Shore D D50~65
Coefficient of Friction   D1984Static 0.02
Abrasion Resistance Taber1000 revs. 12
Impact Strength IZOD
73F/23C
D256notched ft/lbs/in 3.0
THERMAL PROPERTIES
Melting Point  C
(F)
327
(621)
Upper Service
Temperature(20,000h)
 C
(F)
260
(500)
Flame Rating**  UL94 VO

Thermal Conductivity
 BTU/hr/ ft2/deg F in 1.7
C117 cal/sec/cm2,C/cm6 x10-4
Heat of Fusion  BTU/LB
 cal/g
29-37
n.a.
Heat of Combustion  BTU/LB
 cal/g
2200
n.a.
Low Temperature Embrittlement  C
(F)
-268
-450
ELECTRICAL PROPERTIES
Dielectric Constant   D150/103Hz 2.1
  D150/106Hz 2.1
Dissipation Factor   D150/103Hz n.a
  D150/106Hz n.a
Dielectric Strength D149 125MILV.
10MILV.
500
>1400
Volume Resistivity   D257 ohm-cm >1018
Surface Resistivity   ohm/sq. >1017
GENERAL PROPERTIES
Chemical/Solvent
Resistance
    Excellent
Water Absorption, 24h   % <0.01
RefractiveIndex     1.35

Arc Resistivity
  % >300
D495 sec >200