Tefzel® is extremely durable, thin polymeric film closely related to DuPont Teflon® fluorocarbon resin. Lighter and less fragile than glass.  Flexible and nearly 100 percent transparent, Tefzel® film has excellent mechanical strength and reliability against cracking and abrasion. In outdoor applications, Tefzel® shows very little degradation over a long period of time despite constant UV radiation exposure.  Tefzel® features easy processibility and high-energy radiation resistance.

Film types included in this specification are: Type LZ--General-purpose film, Type CLZ--Treated one-side for improved cementability, and Type CLZ-20--Treated both sides for improved cementability.  Tefzel® films can be thermoformed, laminated, heat-sealed, die-stamped, and oriented for use in many applications including composite part mold release, anti-corrosive linings, non-stick roll covers, rupture disks, high frequency microwave circuitry, pharmaceutical cap liners, sterile packaging, cable insulation, microphone electret membranes, photovoltaic cell glazing, anti-graffiti coverings, erasable surface coverings, automotive airbag systems, fuel hose permeation barrier, hot melt adhesive

TEFZEL® Property Value, Types LZ, CLZ, CLZ-20

Property	Film Gauge 50	Film Gauge 100	Film Gauge 200	Film Gauge 500	Film Gauge 1000	Film Gauge 2000	Method
Tensile Strength, psi, 25°C minimum	5000	6000	6000	6000	6000	6000	ASTM D-882 for >/- 10 mil thickness. ASTM D-638 for> 10 mil thickness, 2 inch per minute testing speed.
Elongation at Break, % (Minimum) Shrinkage, % (Maximum at 200°C) MD TD Tear Strength (g/mil), minimum Cementability (Type C film only) Minimum peel strength in g/in. of width	175 ±5 ±5 300 170	200 ±5 ±5 300 300	250 ±3 ±3 400 750	250 ±2 ±2 400 2000	250 ±2 ±2 400 -	250 ±2 ±2 400 -	Same as above Avg. of 5 measurements on room temp. samples before and after each test. Each specimen, 4" x 4" freely suspended in an oven controlled to 200°C±1°C.  Exposure time 0.5 hours Elmendorf ASTM D-1922 Use DuPont adhesive #68040 on Aldine #1200 aluminum sheet (0.019" thick). Peel Test at 180° angle at peel rate 12 inches/min. 12 inches/min.
Dielectric Strength volts/mil, AC minimum	4000	4000	3500	2500	1800	1400	Avg. of 10 samples testes per ASTM D-149 Method A. Flat sheets in air placed between 1/4" diameter brass electrodes with 1/32" edge radius & subjected to 60 Hz. A.C. voltage rise at 500 volts/sec. to the break voltage.
Melt Temperature (Melting Endotherm Peak), °C	250-270						ASTM D-3418 (DTA).
Density (g/cm3). 23°C	1.73-1.77						ASTM D-1505
Dielectric Constant (at 25°C, 1000 Hertz),Maximum	2.7						ASTM D-150. Result is average of 5 tests using measured sample thickness.
Dissipation Factor (at 25°C, 1000 Hertz),Maximum	.0008						ASTM D-150, same as above
Volume Resistivity, ohm-cm. at 170°C,Minimum	1 x 1017						ASTM D-257
Surface Resistivity, ohm (per sq.) at 23°C, 38% R.H. minimum	1 x 10 15						ASTM D-257