ETFE Film

ETFE Film is a thin, high-performance fluoropolymer sheet composed of ethylene tetrafluoroethylene, known for its exceptional tensile strength, impact resistance, and chemical inertness. Its film geometry offers flexibility, lightweight handling, and excellent optical clarity, making it suitable for demanding applications where transparency and durability are required. Industries such as architecture, aerospace, renewable energy, and electronics employ ETFE film for uses including lightweight glazing systems, photovoltaic module encapsulation, protective release layers in semiconductor manufacturing, and weather-resistant membranes. ETFE films also excel in UV stability, high light transmission, and resistance to environmental degradation, enabling long-term outdoor performance. In research and innovation, ETFE film supports the development of advanced membrane structures, anti-soiling coatings, and flexible electronic substrates, delivering a combination of structural resilience and functional adaptability that is critical for modern high-tech and engineering applications.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Foil

Thickness		±20%

Material Properties for Polymers

Chemical Resistance

Element	Value
Acids - concentrated	Good
Acids - dilute	Good
Alcohols	Good
Alkalis	Good
Aromatic hydrocarbons	Good
Greases and Oils	Good
Halogenated Hydrocarbons	Good
Halogens	Good
Ketones	Good

Electrical Properties

Element	Value
Dielectric constant @1MHz	2.6
Dissipation factor @ 1MHz	0.0005
Dielectric strength( kV mm⁻¹ )	25
Surface resistivity( Ohm/sq )	>10¹⁴
Volume resistivity( Ohmcm )	10¹⁶

Physical Properties

Element	Value
Flammability	V0
Radiation resistance	Fair
Refractive index	1.403
Resistance to Ultra-violet	Excellent
Limiting oxygen index( % )	30-32
Water absorption( % )	0-0.03
Density( gcm⁻³ )	1.7

Mechanical Properties

Element	Value
Hardness - Rockwell	R50
Elongation at break( % )	250-350
Tensile modulus( GPa )	0.8
Izod impact strength( J m⁻¹ )	1000
Tensile strength( MPa )	28-48

Thermal Properties

Element	Value
Heat-deflection temperature - 0.45MPa( C )	105
Heat-deflection temperature - 1.8MPa( C )	70
Lower working temperature( C )	-100
Upper working temperature( C )	150-160
Specific heat( J K⁻¹ kg⁻¹ )	1900-2000
Thermal conductivity( W m⁻¹ K⁻¹ )	0.24@23°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	90-170