Fluoroplastic PFA Film

Get to Know Cathay™ PFA Fluoropolymer Films

Cathay™ PFA films are highly chemically inert and solvent resistant; have low permeability to liquids, gases, moisture, and organic vapors; and exhibit very good dielectric properties, high continuous service temperature, favorable antistick and low frictional properties, as well as good weathering and optical properties. Additional features of PFA films are superior creep resistance at high temperatures, excellent low-temperature toughness, and exceptional flame resistance.

These films offer the highest continuous use temperature of 260°C (500°F) of any melt-processable fluoropolymer film type. They offer many of the performance properties of PTFE films in a clear, transparent form.

Typical applications of Cathay™ PFA films are in chemical processing, wire and cable, electronics, mold release in processing composites, circuit board laminates, chemical pumps, tank linings, shrink roll covers, and rupture discs and gaskets.

Techyours™ PFA Film Offers

• The best high and low temperature resistance amongmelt process fluoropolymers:

• Continuous service temperature range from -254 to 260°C (–425 to500°F)

• Melt temperature range: 300 to 310°C (572 to 590°F)

• Chemically inert and solvent resistant to virtually allchemicals

• Outstanding dielectric properties over a wide range offrequencies and temperatures.

• High dielectric strength, over 6,500 V/mil for 1-mil film(260 kV/mm for 25 micron film)

• Excellent light transmission and clarity

• Free of plasticizers, processing aids, or additives

• Processability, such as heat sealing, thermoforming, welding and thermal bonding

Cathay™ PFA Film S Grade

This film grade utilizes the low dielectric constant and dissipation over a wide range of temperatures and frequencies for 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.

Manufactured out of 100% virgin premium grade Everflon™ PFA resinwith MFI range of 5-10

Best suited for applications where high dielectricperformance is required, such as PCB laminates and wire &cable applications

Grade of choice for protective, decorative, see-through andother applications where visual appearance and clarity areimportant

Cathay™ PFA Film W Grade(Weldig)

Type W (mechanical grade) film is an ideal economical solution forapplications that don’t require high aesthetic standards, such as hot melt adhesive(welding tape) application. PFA W grade possesses all physical, mechanical, and thermalproperties of PFA film while offering up to 25% savings.

Typical Physical Properties

Property	Test Method	Unit	Typical Value
General
Specific Gravity	ASTM D792		2.15
Yield (25um film)		m2/kg	18
Flammability	UL-94		V-0
Water Absorption		%	<0.01
Mechanical
Tensile Strength @ Break	ASTM D-882	MPa	26
Elongation @ Break	ASTM D-882	%	300
Tensile Modulus	ASTM D-882	MPa	480
Initial Tear Strength, 25um	ASTM D-1004		2.2-2.7
Propagating Tear Strength, 25um	ASTM D-1922		1.4-1.5
Fold Endurance (M.I.T.)	ASTM D-2176		500,000
Electrical
Dielectric Strength, 25um	ASTM D-149	kV/mm	185
Dielectric Constant, 1 kHz	ASTM D-150		2.1
Dissipation Factor, 1 kHz	ASTM D-150		0.0005
Thermal
Melt Point	ASTM D-3418	°C	310
Continuous Service Temperature		°C	260
Specific Heat		J/(kg•°K)	1172
Coefficient of Thermal Conductivity		W/(m•°K)	0.195
Coefficient of Linear Thermal Expansion	ASTM D-696	mm/(mm •°C)	9.9 x 10^-5
Limiting Oxygen Index	ASTM D-2863	%	95
Optical
Refractive Index	ASTM D-542		1.35
Solar Transmission	ASTM E-424	%	96