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Medical Tubing
FEP Properties
   
 FEP (Fluorinated Ethylene Propylene)

Working Temperature: 400°F (205°C)
Color: Clear
  • Excellent chemical resistance
  • Nonwetting
  • Weldable
  • Tubes can be sealed by melting
  • Long continuous lengths
  • Low refractive index
  • Improved clarity over PFA
  • Lower cost alternative to PFA
  
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 Detailed Properties
(Fluorinated Ethylene Propylene)

Properties ASTM or Unit FEP
MECHANICAL PROPERTIES

Specific GravityD792 2.15
Elongation %D638 250~330
Tensile Strength (psi) D6382,800~5,000
Flexural Strength (psi)D790 no break
Compressive Strength D695 2,200
Tensile Elastic Modulus 
(Young's Modulus) (psi)		 D63850,000
(psi)
Flexural Modulus
103MPa (103kgf/cm2)		 D79078,000~
92,000
D7900.5-0.6
(5.5-6.5)
Flex Life
(MIT cycles)		 D2176 5,000~
80,000
Hardness Durometer
 Shore D		 D636D55
Coefficient of Friction on steel 0.05
Abrasion Resistance
1000 revs.		 Taber14~20
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 94V-0

Thermal Conductivity
 		 BTU/hr/ft2/deg F in1.4
cal/sec/cm2,ºC/cm6 x 10-4
Linear Coefficient of Thermal Expansion 10-5 °C D696 8.3~10.5
Heat of Fusion BTU/LB11
Heat of Combustion BTU/LB2200
Low Temperature Embrittlement °C
(°F)		-268
(-450)

ELECTRICAL PROPERTIES

Dielectric Constant D150/103Hz2.1
D150/106Hz2.1
Dielectric Strength
10 mil film		 D149>2000
Volume Resistivity ohm-cmD257 >1018
Surface Resistivity
ohm/sq.		D257 >1017
GENERAL PROPERTIES

Chemical/Solvent
Resistance		D543 Excellent
Water Absorption, 24h%<0.01
Deformation Under Load *D621/100°C5.0
**D621/25°C 3.0
Refractive Index 1.338
Limiting Oxygen Index>95>95
Properties ASTM or Unit FEP

*6.8 MPa (986 psi),24h
 **13.7 MPa (1987 psi),24h
 
 
 
 
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