Chemours Teflon™ Type C-20, both sides cementable FEP Film

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Chemours Teflon™ Type C-20, both sides cementable FEP Film
Categories:	Polymer; Film; Thermoplastic; Fluoropolymer; Fluorinated Ethylene Propylene (FEP)
Material Notes:	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, Electrical Reliability, Wide Thermal Range, Mechanical Toughness, Long Time Weather ability, and Reliability. Information provided by Chemours.
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Physical Properties	Original Value	Comments

Density	2.15 g/cc	ASTM D1505
Water Absorption	<= 0.010 % @Time 86400 sec	ASTM D570
Moisture Absorption	<= 0.0100 %
Specific Surface Area	0.0038 m²/g
	0.0090 m²/g
	0.018 m²/g
Water Vapor Transmission	0.400 g/100 in²/day	ASTM E96
Oxygen Transmission	11600 cc-mm/m²-24hr-atm	ASTM D1434
Nitrogen Transmission	5000 cc-mm/m²-24hr-atm	ASTM D1434
Carbon Dioxide Transmission	25900 cc-mm/m²-24hr-atm	ASTM D1434
Hydrogen Sulfide Transmission	34100 cc-mm/m²-24hr-atm	ASTM D1434
Permeability	0.31	Carbon Tetrachloride. g/100 in2·24 hr.; ASTM E96
	0.41	Acetic Acid. g/100 in2·24 hr.; ASTM E96
	0.56	Hexane. g/100 in2·24 hr.; ASTM E96
	0.64	Benzene. g/100 in2·24 hr.; ASTM E96
	0.69	Ethyl Alcohol. g/100 in2·24 hr.; ASTM E96
	0.95	Acetone. g/100 in2·24 hr.; ASTM E96
Thickness	1.00 mil
	2.00 mil
	5.00 mil

Mechanical Properties	Original Value	Comments
Hardness, Shore D	56	ASTM D2240
Tensile Strength at Break	3000 psi	ASTM D882
Tensile Strength	23.0 MPa	ASTM D1457
Tensile Strength, Yield	12.0 MPa	ASTM D882
Elongation at Break	300 %	ASTM D882
Modulus of Elasticity	70.0 ksi	ASTM D882
Flexural Modulus	0.586 GPa	ASTM D790
Flex Crack Resistance	10000	Cycles MIT Folding Endurance; ASTM D2176
Izod Impact, Notched	144 ft-lb/in	Chemours pneumatic impact tester
Coefficient of Friction	0.10 - 0.30	ASTM D1894

Electrical Properties	Original Value	Comments
Volume Resistivity	>= 1.00e+18 ohm-cm @Temperature -40.0 - 240 °C	ASTM D257
Surface Resistivity per Square	>= 1.00e+16 ohm @Temperature -40.0 - 240 °C	ASTM D257
Insulation Resistivity	65000 Megaohm/1000 ft @Temperature 200 °C	0.2 MF wound capacitor section, single layer, Teflon™ 50A film.
	250000 Megaohm/1000 ft @Temperature 150 °C	0.2 MF wound capacitor section, single layer, Teflon™ 50A film.
	350000 Megaohm/1000 ft @Temperature 100 °C	0.2 MF wound capacitor section, single layer, Teflon™ 50A film.
Dielectric Constant	1.93 - 2.02 @Frequency 1000 Hz, Temperature -40.0 - 225 °C	ASTM D150
	2.0 @Frequency 100 - 1.00e+6 Hz, Temperature 25.0 °C	ASTM D150
Dielectric Strength	70.0 kV/mm @Thickness 0.500 mm	Short-time, in air; ASTM D149 Method A
	260 kV/mm @Thickness 0.0250 mm	Short-time, in air; ASTM D149 Method A
Dissipation Factor	0.00020 @Frequency 1000 Hz, Temperature -40.0 - 225 °C	ASTM D150
	0.00020 - 0.00070 @Frequency 100 - 1.00e+6 Hz, Temperature 25.0 °C	ASTM D150
	0.00050 @Frequency 1e+6 Hz, Temperature -40.0 - 240 °C	ASTM D150
Arc Resistance	>= 165 sec	Samples melted in arc did not track.; ASTM D495

Thermal Properties	Original Value	Comments
Specific Heat Capacity	0.280 BTU/lb-°F
Thermal Conductivity	0.195 W/m-K	Cenco-Fitch
Melting Point	260 - 280 °C	DTA; ASTM D3418
Maximum Service Temperature, Air	255 °C	Zero Strength Temperature
Deflection Temperature at 0.46 MPa (66 psi)	70.0 °C	D648 Tensile Bars
Deflection Temperature at 1.8 MPa (264 psi)	51.0 °C	D648 Tensile Bars
Oxygen Index	>= 95 %	ASTM D2863

Optical Properties	Original Value	Comments
Refractive Index	1.341 - 1.347
Transmission, Visible	96 %	Solar Transmission; ASTM E-424

Descriptive Properties
Bursting Strength (Mullen)	11 psi	ASTM D774
Chemical/Solvent Resistance	Excellent	ASTM D543
Detergent Resistance (hours)	480	On grit blast aluminum
	600	On aluminum
	744
Dimensional Stability	0.72% Expanse	MD. 30 minutes at 150°C
	2.2% shrinkage	TD. 30 minutes at 150°C
Flammability Rating	VTM-O
Heat of Combustion	5.1 MJ/kg	ASTM D240
Salt Spray Resistance Coatings (hours)	744+	ASTM B117. 5% NaCl at 35 °C (95 °F).
Tear Strength-Initial (Graves)	270 g force	ASTM D1004
Tear Strength-Propagating (Elmendorf)	125 g	ASTM D 1922
Weather Resistance (years unaffected)	20	No adverse effects. Continuous exposure in Florida.

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PDU8845 / 268772

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