FEP (Fluorinated Ethylene Propylene) Detailed Properties

 

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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.

FEP Properties ASTM or Unit FEP Properties
MECHANICAL PROPERTIES
Specific Gravity
D792
2.15
Elongation %
D638
250~330
Tensile Strength (psi)
D638
2,800~5,000
Flexural Strength (psi)
D790
no break
Compressive Strength
D695
2,200
Tensile Elastic Modulus 
(Young's Modulus) (psi)
D638
50,000
(psi)
Flexural Modulus
103MPa (103kgf/cm2)
D790
78,000~
92,000
D790
0.5-0.6
(5.5-6.5)
Flex Life
(MIT cycles)
D2176
5,000~
80,000
Hardness Durometer
Shore D
D636
D55
Coefficient of Friction
on steel
0.05
Abrasion Resistance
1000 revs.
Taber
14~20
Impact Strength IZOD
73°F/23°C, notched ft/lbs/in
D256
no break
THERMAL PROPERTIES
Melting Point °C
(°F)
260
(500)
Upper Service
Temperature(20,000h)
°C
(°F)
200
(392)
Flame Rating** UL 94 V-0
Thermal Conductivity BTU/hr/ft2/deg F in 1.4
cal/sec/cm2,°C/cm 6 x 10-4
Linear Coefficient of Thermal Expansion 10-5 °C D696 8.3~10.5
Heat of Fusion BTU/LB 11
Heat of Combustion BTU/LB 2200
Low Temperature Embrittlement °C
(°F)
-268
(-450)
ELECTRICAL PROPERTIES
Dielectric Constant D150/103Hz 2.1
D150/106Hz 2.1
Dielectric Strength
10 mil film
D149 >2000
Volume Resistivity ohm-cm D257 >1018
Surface Resistivity
ohm/sq.
D257 >1017
GENERAL PROPERTIES
Chemical/Solvent
Resistance
D543 Excellent
Water Absorption, 24h % <0.01
Deformation Under Load *D621/100°C 5.0
**D621/25°C 3.0
Refractive Index   1.338
Limiting Oxygen Index >95 >95
Properties ASTM or Unit FEP

 

Design Recommendation Disclaimer:
Recommendations on application design and material selection are based upon available technical data and are offered as suggestions only. Each user should conduct evaluations to determine the suitability for his particular application. ROW, Inc. offers no express or implied warranties concerning the form, fit, or function of a product in any application.