Fluoropolymer Film
Properties Bulletin
Description
Teflon
™
FEP film is a transparent, thermoplastic film
that can be heat sealed, thermoformed, vacuum formed,
heat bonded, welded, metalized, and laminated to many
other materials, as well as used as an excellent hot-melt
adhesive.
This wide variety of fabrication possibilities combines with
the following important properties to offer a unique balance
of capabilities not available in any other plastic film.
Chemical Compatibility
• Teflon
™
FEP film is chemically inert and resistant to
virtually all chemicals, except molten alkali metals,
gaseous fluorine, and certain complex halogenated
compounds, such as chlorine trifluoride, at elevated
temperatures and pressures.
• Low permeability to liquids, gases, moisture, and organic
vapors
Electrical Reliability
• Superior reliability and retention of properties over large
areas of film
• High dielectric strength, over 6,500 V/mil for 1-mil film
(260 kV/mm for 0.025-mm film)
• No electrical tracking, non-wetting, and/or non-charring
• Very low power factor and dielectric constant, only slight
change over wide ranges of temperature and frequency
Wide Thermal Range
• Continuous service temperature: –240 to 205 °C
(–400 to 400 °F)
• Melting range: 250 to 280 °C (500 to 540 °F)
• Heat sealable
Mechanical Toughness
• Superior anti-stick and low frictional properties
• High resistance to impact and tearing
• Useful physical properties at cryogenic temperatures
Long Time Weatherability*
• Inert to outdoor exposure; no measurable change after
20 years in Florida
• High transmittance of ultraviolet and all, but far, infrared
radiation
Reliability
• Teflon
™
FEP film contains no plasticizers or other
foreign materials.
• Conventional equipment and techniques can be used
for processing; basic composition and properties will
not be influenced.
• Rigid quality control by Chemours ensures uniform
gauge, void-free film.
Teflon™ FEP Film
The convenience of Teflon
™
FEP fluoropolymer in
easy-to-use film facilitates the design and fabrication
of this low-friction thermoplastic for all sorts of high-
performance jobs. It is transparent and can be heat
sealed, thermoformed, welded, and heat bonded.
Superior anti-stick properties make it an ideal release
film for many applications. A cementable type with an
invisible surface treatment is available for bonding to one
or both sides with adhesives. This versatility is augmented
by the superior properties of a true melt-processible
fluoropolymer and the wide choice of product dimensions
available from Chemours.
*Type C film is not recommended for outdoor use.
Teflon
™
FEP
Teflon
™
FEP
Fluoropolymer Film
Table 1. Types and Gauges of Teflon
™
FEP Fluoropolymer Film
Gauge
50 100 175 200 300 500 750 1000 2000
Thickness, mil 0.5 1 1.75 2 3 5 7.5 10 20
Thickness, µm 12.5 25 44 50 75 125 190 250 500
Approx. area factor, ft
2
/lb 180 90 51 45 30 18 12 9 4.5
Approx. area factor, m
2
/kg 36 18 10.3 9 6 4 3.8 2.5 1.9 0.95
Availability
Type A—FEP, general-purpose X X X X X X X X X
Type C—FEP, one side
cementable
— X X X X X — — —
Type C-20—FEP, both sides
cementable
— X — X — X — — —
Note: Each roll of Teflon
™
film is clearly identified as to resin type, film thickness, and film type.
FEP: Resin type 500: Film thickness, 500 gauge, 5 mil C: Film type, cementable one side
Typical Properties of Teflon
™
FEP Fluoropolymer Film
Property Test Method
Typical Value
a
SI Units English Units
Mechanical
Tensile Strength at Break D882 21 N/mm
2
3000 psi
Elongation at Break D882 300%
Yield Point D882 12 MPa 1700 psi
Elastic Modulus D882 480 MPa 70,000 psi
Impact Strength
Chemours pneumatic
impact tester
7.7 X 10
3
J/m 144 ft-lb/in
Folding Endurance (MIT) D2176 10,000 cycles
Tear Strength–Initial (Graves) D1004 2.65 N 270 g force
Tear Strength–Propagating (Elmendorf) D1922 1.23 N 125 g
Bursting Strength (Mullen) D774 76 kPa 11 psi
Thermal
Melt Point D3418 (DTA) 260–280 °C 500–536 °F
Zero Strength Temperature
b
255 °C 490 °F
Coefficient of Thermal Conductivity Cenco-Fitch 0.195 W/(m·K) 1.35 Btu·in/(hr·ft
2
·°F)
Specific Heat — 1172 J/(kg·K) 0.28 Btu/(lb·°F)
Heat Deflection Temperature
at 0.46 N/mm
2
(66 psi)
at 1.82 N/mm
2
(264 psi)
D648 Tensile Bars
70 °C
51 °C
158 °F
124 °F
Dimensional Stability 30 min at 150 °C (302 °F)
MD = 0.72% expansion
TD = 2.2% shrinkage
Flammability Classification
c
ANSI/UL 94 VTM-0
Oxygen Index D2863 95%
a
For 0.025 mm (1 mil) film at 25 °C (77 °F), unless otherwise specified.
b
Temperature at which a film supports a load of 0.14 N/mm
2
(20 psi) for 5 sec.
c
This classification rating is not intended to reflect hazards presented by this or any other material under actual fire conditions.
Teflon
™
FEP
Fluoropolymer Film
Property Test Method
Typical Value
a
SI Units English Units
Electrical
Dielectric Strength, short-time, in air at
23 °C (73 °F), 6.35 mm (1/4 in) diameter
electrode, 0.79 mm (1/32 in) radius
60 Hz, 500 V/s rate of rise:
0.025 mm (1 mil) film
0.5 mm (20 mil) film
ASTM D149 Method A
260 kV/mm
70 kV/mm
6500 V/mil
1800 V/mil
Dielectric Constant
25 °C (77 °F), 100 Hz–1 MHz
–40–225 °C (–40–437 °F), 1000 Hz
ASTM D150
2.0
1.93–2.02
Dissipation Factor
25 °C (77 °F), 100 Hz–1 MHz
–40–225 °C (–40–437 °F), 1000 Hz
–40–240 °C (–40–464 °F), 1 MHz
ASTM D150
0.0002–0.0007
0.0002
0.0005
Volume Resistivity
–40–240 °C (–40–464 °F)
ASTM D257
>1 X 10
18
ohm·cm
Surface Resistivity
–40–240 °C (–40–464 °F)
ASTM D257
>1 X 10
16
ohm/sq
Surface Arc Resistance ASTM D495 >165 sec
b
Insulation Resistance
at 100 °C (212 °F)
at 150 °C (302 °F)
at 200 °C (392 °F)
Based upon 0.2 MF
wound capacitor sections,
using single layer,
Teflon
™
50A film
350,000 Mohm·µF
250,000 Mohm·µF
65,000 Mohm·µF
Chemical
Moisture Absorption — <0.01%
Weatherability
Continuous exposure
in Florida
No adverse effects after 20 yr
Permeability, Gas:
Carbon Dioxide
Hydrogen
Nitrogen
Oxygen
ASTM D1434 cm
3
/m
2
·24 hr·atm
c
25.9 X 10
3
34.1 X 10
3
5.0 X 10
3
11.6 X 10
3
Permeability, Vapor:
Acetic Acid
Acetone
Benzene
Carbon Tetrachloride
Ethyl Alcohol
Hexane
Water
ASTM E96 g/m
2
·d g/100 in
2
·24 hr
6.3
14.7
9.9
4.8
10.7
8.7
7.0
0.41
0.95
0.64
0.31
0.69
0.56
0.40
a
For 0.025 mm (1 mil) film at 25 °C (77 °F), unless otherwise specified.
b
Samples melted in arc did not track.
c
To convert to cm
3
/(100 in
2
·24 hr·atm), multiply by 0.0645.
Teflon
™
FEP fluoropolymer is chemically inert and solvent-resistant to virtually all chemicals, except molten alkali metals,
gaseous fluorine, and certain complex halogenated compounds, such as chlorine trifluoride, at elevated temperatures
and pressures.
Typical Properties of Teflon
™
FEP Fluoropolymer Film (cont'd.)
Teflon
™
FEP
Fluoropolymer Film
© 2017 The Chemours Company FC, LLC. Teflon
™
and any associated logos are trademarks or copyrights of The Chemours Company FC, LLC. Chemours
™
and the Chemours Logo are
trademarks of The Chemours Company.
Replaces: K-26941-1
C-10597 (9/17)
For more information, visit teflon.com/industrial
For sales and technical support contacts, visit teflon.com/industrialglobalsupport
*For 0.025 mm (1 mil) film at 25 °C (77 °F), unless otherwise specified.
CAUTION: Do not use or resell Chemours materials in medical applications involving implantation in the human body or contact with internal bodily fluids or tissues unless agreed to by Seller in a written
agreement covering such use. For further information, please contact your Chemours representative. For medical emergencies, spills, or other critical situations, call (866) 595-1473 within the United
States. For those outside of the United States, call (302) 773-2000.
The information set forth herein is furnished free of charge and based on technical data that Chemours believes to be reliable. It is intended for use by persons having technical skill, at their own
discretion and risk. The handling precaution information contained herein is given with the understanding that those using it will satisfy themselves that their particular conditions of use present
no health or safety hazards. Because conditions of product use are outside our control, Chemours makes no warranties, express or implied, and assumes no liability in connection with any use
of this information. As with any material, evaluation of any compound under end-use conditions prior to specification is essential. Nothing herein is to be taken as a license to operate under or a
recommendation to infringe any patents.
NO PART OF THIS MATERIAL MAY BE REPRODUCED, STORED IN A RETRIEVAL SYSTEM OR TRANSMITTED IN ANY FORM OR BY ANY MEANS ELECTRONIC, MECHANICAL, PHOTOCOPYING, RECORDING OR OTHERWISE
WITHOUT THE PRIOR WRITTEN PERMISSION OF CHEMOURS.
HOW TO USE THE TEFLON
™
BRAND NAME WITH YOUR PRODUCT
Teflon
™
is a registered trademark of Chemours for its brand of fluoropolymer resins, coatings, films, and dispersions. The Teflon
™
brand name is licensed by Chemours in association with approved applications.
Without a trademark license, customers may not identify their product with the Teflon
™
brand name, as Chemours does not sell such offerings with the Teflon
™
trademark. Unlicensed customers may refer to
the Chemours product offering with only the Chemours name and product code number descriptor as Chemours sells its product offerings. There are no fair use rights or exhaustion of rights to use the Teflon
™
trademark from buying from Chemours, a Chemours customer, or a distributor without a trademark license from Chemours.
If you are interested in applying for a trademark licensing agreement for the Teflon
™
brand, please visit www.teflon.com/license
Property Values of Teflon
™
FEP Fluoropolymer Film (cont'd.)
Property Test Method
Typical Value
a
SI Units English Units
Miscellaneous
Density ASTM D1505 2150 kg/m
3
134 lb/ft
3
Coefficient of Friction, Kinetic
(Film-to-Steel)
ASTM D1894 0.1–0.3
Refractive Index ASTM D542 1.341–1.347
Solar Transmission ASTM E-424 96%
*
