The TexLoc Library
Property Comparison Chart
 
 
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.   There are 2 tables on this page.
 

Table 1

Table 2

PTFE   FEP   PFA   ETFE   ECTFE

PVDF   THV   PEEK™

 (If you would like to view the properties of a particular resin click on the hyperlink in the chart below)

Table 1
Property Comparison of Fluoroplastic/Fluoropolymer Resins

Properties ASTM or Unit PTFE FEP PFA ETFE ECTFE
MECHANICAL PROPERTIES
Specific GravityD792 2.13-2.202.12-2.17 2.12-2.171.70-1.76 1.68
Elongation % D638200-450 250-330280-400 420-460200-300
Tensile Strength (psi)D638 2000-45002800-5000 4000-4500 6100-6800

6600-7800

Flexural Strength (psi) D790no break no breakno break 55007000
Compressive Strength (psi)

D695

35002200  2500 1276-1711
Tensile Elastic Modulus 
(Young's Modulus) (psi)
D63857,000 50,00072,500-87,000 85000-
95000
240,000
Flexural Modulus (psi)D790 71,000-
85,000
78,000-
92,000
94,000-
99,000
128,000-
171,000
240,000
Flexural Modulus
103MPa (103kgf/cm2)
D7900.5-0.6
(5.0-6.0)
0.5-0.6
(5.5-6.5)
0.6-0.7
(6.6-7.0)
0.9-1.4
(9.0-14.0)
1.4-1.8
(14-18)
Flex Life
(MIT cycles)
D2176>1,000,000 5,000-
80,000
10,000-
500,000
10,000-
27,000
na
Hardness Durometer Shore DD636 50-655555-60 7575-90
Coefficient of Friction  (on steel)0.020.05 0.20.060.19
Abrasion Resistance
1000 revs.
Taber 1214-209-17 na0.005
Impact Strength IZOD
73F/23C notched ft/lbs/in
D2563no break no breakno breakno break
THERMAL PROPERTIES
Melting Point C
(F)
327
(621)
260
(500)
305
582)
267
(512)
240
(464)
Upper Service
Temperature(20000h)
C
(F)
260
(500)
204
(400)
260
(500)
176
(348)
150-170
(300-340)
Flammability UL 94V-0V-0 V-0V-0V-0
Thermal Conductivity
BTU/hr/sq ft/deg F in
  1.71.41.3 1.651.6
Thermal Conductivity
Cal-cm/s-cm2, C
 6 x 10-4 6 x 10-46 x 10-65.7 x 10-4 4.7-5.3 x 10-4
Linear Coefficient of
Thermal Expansion
D696
10-5 C
>11.68.3-10.513 13na
Heat of Fusion BTU/LB29-3711 1320 na
Heat of CombustionBTU/LB 22002200 23008100 na
Low Temperature Embrittlement C
(F)
-268
-450
-268
-450
-268
-450
-100
-148
-76
-105
ELECTRICAL PROPERTIES
Dielectric Constant D150/103Hz 2.1 2.1 2.1 2.6 2.5
D150/106Hz 2.1 2.1 2.1 2.6 2.59
Dielectric Strength D149/125 MIL 500 500 500 na na
D149/10 MIL >1400 >1400>14001600 na
Volume Resistivity D257/ohm-cm>1018 >1018>1018 >1016>1016
Surface Resistivity D257/ohm-cm >1017 >1017 >1017 >1015 >1014-1015
GENERAL PROPERTIES
Chemical/Solvent Resistance D543 Excellent Excellent Excellent Excellent Excellent
Water Absorption 24h,% D570 <0.01 <0.01 <0.03 <0.03 < 0.1
Deformation Under Load *D621 100 C 5.0 5.0 2.4 5.4 2.6
Deformation Under Load **D621 25 C 7.0 3.0 2.7 2.3 0.2
Refractive Index 1.35 1.338 1.34 1.40 1.447
Arc Resistivity, %
sec
  >300 >300 >300 75 na
D495 >200 >300 >300 122 135
Limiting Oxygen Index, % D2863 >95 >95 >95 31 60
Properties ASTM or Unit PTFE FEP PFA ETFE ECTFE
*6.8MPa (986psi), 24h
**13.7MPa(1987psi), 24h

Table 2
Property Comparison of Fluoroplastic/Fluoropolymer Resins

Properties ASTM or Unit PVDF THV PEEK™  
MECHANICAL PROPERTIES
Specific Gravity D792 1.76-1.78 2.12-2.17 1.95-1.98  
Elongation % D638300-450300-360 500-600
Tensile Strength (psi) D638 4500-62003500-44002900-4060
Flexural Strength (psi)  8600-9500 na na
Compressive Strength

D695

11,600 2200na
Tensile Elastic Modulus 
(Young's Modulus) (psi)
D638160,00065,000-
78,000
na
Flexural Modulus
103MPa (103kgf/cm2)
D790 90,00-
168,000
95,000 12,000-
30,000
Flex Life
(MIT cycles)
D2176na10,000-
100,000
na
Hardness Durometer Shore DD636 75-8555-6044-54
Coefficient of Friction (on steel) D19840.4 0.2na
Abrasion Resistance
1000 revs.
Taber5-1510-17 na
Impact Strength IZOD
73F/23C notched ft/lbs/in
D2564no break no break
THERMAL PROPERTIES
Melting PointC
(F)
171
(340)
285
(545)
120 - 165
(248 - 536)
 
Upper Service
Temperature(20000h)
C
(F)
130
(265)
260
(500)
80 - 120
(176 - 248)
Flammability UL 94V-0V-0 V-0
Thermal Conductivity
BTU/hr/sq ft/deg F in
C177 1.31.41.4
Linear Coefficient of
Thermal Expansion
D696
10-5 oC
4.211-12 na
Heat of Fusion BTU/LB
cal/g
na
4390
25.6
na
na
na
Heat of CombustionBTU/LB na 6200na
Low Temperature Embrittlement C
(F)
-62
(-80)
-232
(-450)
na
na
ELECTRICAL PROPERTIES
Dielectric Constant D150/103Hz7.72 2.03.5  
D150/106Hz6.432.1 4.2
Dielectric StrengthD149/125 MIL 1700na na
D149/10 MIL >108020001400
Volume Resistivity D257/ohm-cm 2 x 1014>1017 >1015
Surface Resistivity D257/ohm-cm5 x 1014 >1017na
GENERAL PROPERTIES
Chemical/Solvent Resistance Very GoodExcellent Excellent  
Water Absorption 24h, % D570<0.04 <0.03<0.01
Refractive Index  1.42na 1.35
Arc Resistivity, %, sec D49550-60 240na
Limiting Oxygen Index, %D2863 43>95 >65 - >75
Properties ASTM or Unit PVDF THV PEEK™  
 
 
 
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