DuPont Teijin Films Mylar® EL21 Polyester Film, 1000 Gauge

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DuPont Teijin Films Mylar® EL21 Polyester Film, 1000 Gauge
Categories:	Polymer; Film; Thermoplastic; Polyester, TP; Polyester Film
Material Notes:	Mylar® EL21 polyester films are flexible strong and durable films with an unusual balance of properties, making them suitable for a variety of industrial applications. The excellent dielectric strength, moisture resistance, and physical toughness make Mylar® EL21 a very versatile and functional insulating material. General Product Info: Mylar® EL21 films offer high dielectric strength, good chemical resistance, and exceptional durability in high-temperature environments Typical Applications: Mylar® type EL21 films, similar to Mylar® type MO films, are heavy gauge insulating films designed for general purpose electrical/electronic applications, such as transformers, laminates, bus bars, and punched parts. Approvals: UL 94 VTM-2 - for 92-1400 gauge(0.023-0.35 mm) and UL Recognition - for 92-500 gauge (0.023-0.13mm) HWI=5, HAI=4, CTI=1;for 700-1400 gauge (0.18-0.35mm) HWI=4, HAI=0, CTI=1 Information provided by DuPont.
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Physical Properties	Original Value	Comments

Density	1.3925 g/cc
Thickness	10.0 mil

Mechanical Properties	Original Value	Comments
Film Elongation at Break, MD	150 %	ASTM D882A
Film Elongation at Break, TD	140 %	ASTM D882A
Film Tensile Strength at Break, MD	27000 psi	ASTM D882A
Film Tensile Strength at Break, TD	29000 psi	ASTM D882A

Electrical Properties	Original Value	Comments
Dielectric Strength	1900 V/mil	1/4" electrode 500 V/sec 25°C in air; ASTM D149
Dielectric Breakdown	19000 V	1/4" electrode 500 V/sec 25°C in air; ASTM D149
Comparative Tracking Index	400 - 600 V
Hot Wire Ignition, HWI	7.0 - 15 sec
High Amp Arc Ignition, HAI	>= 120 arcs

Thermal Properties	Original Value	Comments
Specific Heat Capacity	1.17 J/g-°C	Typical Mylar®
Melting Point	254 °C	Typical Mylar® via DSC
Shrinkage, MD	1.5 % @Temperature 150 °C, Time 1800 sec	Unrestrained
Shrinkage, TD	1.1 % @Temperature 150 °C, Time 1800 sec	Unrestrained

Optical Properties	Original Value	Comments
Refractive Index	1.64 - 1.67	typical of Mylar®
Optical Density	42	[%]

Descriptive Properties
Yield (nominal)	2000 in²/lb

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PDTZ9328 / 139648

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