Chemical
Compatibility
Several types of clear FEP film
comply with USFDA legislations for safe use with food
FEP is
chemically inert and solvent-resistant to virtually all chemicals, except molten
alkali metals, gaseous fluorine, and certain complex halogenated compounds such
as chlorine
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 6500 V/mil for 1
mil film (260 kV/mm for 0.025 mm film)
No electrical tracking, non-wettable, and
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 antistick and low frictional properties
High resistance to impact and tearing
Useful physical properties at cryogenic
temperatures
Product Grades
Norton® FEP
fluoropolymer film is manufactured from flourinated
ethylene propylene (FEP) resin by Saint Gobain Advanced films and Fabrics in
four grades.
FEP Type FG
utilizes the low dielectric constant and dissipation
over a wide range of temperatures and frequencies for a low signal distortion
and attenuation in flexible printed circuit and flat cable applications. The
high surface and volume resistivity minimizes current leakage and provides
excellent insulation in wire and cable applications.
Norton® FEP also provides the chemical and
thermal resistance to withstand aggressive environments, making it an excellent
candidate for diaphragms, gaskets, protective linings, sample bags, and
containers. Fabricated shapes and contours can be produced via heat sealing and
thermal forming. The outstanding weatherability and optical properties of FEP
film provide excellent performance in environmental growth chambers and solar
collectors.
FEP Type FS
is a translucent film made from high molecular weight
resin for applications where high flex life and stress crack resistant
performance is required, such as tank linings and diaphragms.
FEP Type RF
is a clear or pigmented film designed for release
applications. The non-stick surface, chemical resistance, and 205°C (400°F)
usage temperature make FEP Type RF an ideal release film for composite molding
over a wide range of resin systems. High elongation and a smooth, low gel film
surface allow FEP to conform to complex mold contours and produce a smooth part
finish. Perforated film is available to control outgassing and resin bleed.
Pigmented films increase visibility to speed removal from parts and mold.
FEP Type WF
(mechanical grade) film is an ideal
economical solution for applications that don't require high aesthetic
standards, such as hot melt adhesive (welding tape) application. FEP WF film
possesses all physical , mechanical, and thermal properties of FEP FG grade,
while offering up to 15% savings. (see below)
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