DuPont ™ Cirlex ^®
Polyimide Film SpecificationS

GENERAL PROPERTIES

DuPont ^™ Cirlex ^® polyimide film is a high performance polymer which combines excellent physical, electrical, and mechanical properties at temperatures as low as -452°F (-269°C) and as high as +650°F (+340°C).

Made from the same material as DuPont ^™ Kapton ^® polyimide film, Cirlex ^® has the same excellent balance of physical, chemical, and electrical properties over a wide temperature range.

Cirlex ^® can be modified by laser cutting, drilling, machining, stamping, shearing and chemical etching to very exact tolerances.

Cirlex ^® is available in sheet sizes up to 23.5" x 23.5" (597 mm x 597 mm), and thicknesses from 0.006" (0.15 mm) to 0.125" (3.175 mm) in thickness increments of 0.001". Custom sheet sizes are also available upon special request. Cirlex ^® is packaged in "lay-flat" containers with protective interleaving.

DuPont ^™ Cirlex ^® is a product of DuPont, and is Amber in color.

TYPICAL APPLICATIONS
• PCB stencils • loudspeaker components • flexible printed circuit board substrates • metal clad, thick polymide materials (>0.008" thick) • high-density electronic interconnects • high-temperature mechanical seals

( see also Vespel , Kapton Film , and Imidex Film Polyimide Specifications )

TYPICAL PROPERTIES of CIRLEX POLYIMIDE FILMS (at 73°F)
ASTM or UL test	Property	Cirlex ® 900CL 0.009" (.23mm)	Cirlex ®1200CL 0.012" (.31mm)	Cirlex ®1500CL 0.015" (.38mm)	Cirlex ®3000CL 0.030" (.76mm)	Cirlex ®5000CL 0.050" (1.27mm)
PHYSICAL
D792	Density (lb/in³) (g/cm³)	0.051 1.42	0.051 1.42	0.051 1.42	0.051 1.42	0.051 1.42
D570	Water Absorption, saturation (%)	4.0	4.0	4.0	4.0	4.0
MECHANICAL
D638	Tensile Strength (psi)	32,490	34,000	35,000	33,300	31,800
D638	Yield Point at 3% (psi)	6,100	6,500	7,800	7,100	6,100
D638	Stress to Produce 5% Elongation (psi)	10,300	10,800	11,200	10,370	9,400
D790	Ultimate Elongation (%)	65	64	63	57	56
D790	Tensile Modulus (psi)	330,000	332,000	334,000	274,000	264,000
THERMAL
-	Glass Transition Temp (°F / °C)	664 / 351	664 / 351	664 / 351	664 / 351	664 / 351
D696	Coefficient of Linear Thermal Expansion (x 10 -5 in./in./°F)	11	11	11	11	11
C177	Thermal Conductivity (BTU-in/ft²-hr-°F) (x 10 -4 cal/cm-sec-°C)	0.0025 0.084	0.0025 0.084	0.0025 0.084	0.0025 0.084	0.0025 0.084
C177	Specific Heat (J/g-°K)	1.09	1.09	1.09	1.09	1.09
UL94	Flammability Rating	V-0	V-0	V-0	V-0	V-0
ELECTRICAL
D149	Dielectric Strength (V/mil) short time	2790	2000	1940	1270	arc
D150	Dielectric Constant at 1 kHz	3.45	3.55	3.58	3.74	3.72
D150	Dissipation Factor	0.0021	0.0020	0.0018	0.0023	0.0026

NOTE: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers' complete material property datasheets.
All values at 73°F (23°C) unless otherwise noted.

KAPTON, CIRLEX and VESPEL are registered trademarks of DuPont.