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DuPont Teijin Films Mylar® EL21 Polyester Film, 900 Gauge

Category Polymer , Film , Thermoplastic , Polyester, TP , Polyester Film
Manufacturer DuPont Teijin Films (DTF)
Trade Name Mylar®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF DuPont Teijin Films Mylar® EL21 Polyester Film, 900 Gauge.pdf
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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 environmentsTypical 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=1Information provided by DuPont.
Physical Properties Metric English Comments
Density 1.392 g/cc
0.05029 lb/in³
Mechanical Properties Metric English Comments
Film Elongation at Break, MD 150 %
150 %
ASTM D882A
Film Elongation at Break, TD 130 %
130 %
ASTM D882A
Film Tensile Strength at Break, MD 186 MPa
27000 psi
ASTM D882A
Film Tensile Strength at Break, TD 200 MPa
29000 psi
ASTM D882A
Thermal Properties Metric English Comments
Specific Heat Capacity 1.17 J/g-°C
0.280 BTU/lb-°F
Typical Mylar®
Melting Point 254 °C
489 °F
Typical Mylar® via DSC
Shrinkage, MD 1.6 %

@Temperature 150 °C,
Time 1800 sec
1.6 %

@Temperature 302 °F,
Time 0.500 hour
Unrestrained
Shrinkage, TD 1.1 %

@Temperature 150 °C,
Time 1800 sec
1.1 %

@Temperature 302 °F,
Time 0.500 hour
Unrestrained
Optical Properties Metric English Comments
Refractive Index 1.64 - 1.67
1.64 - 1.67
typical of Mylar®
Optical Density 41
41
[%]
Electrical Properties Metric English Comments
Dielectric Strength 80.47 kV/mm
2044 kV/in
1/4" electrode 500 V/sec 25°C in air; ASTM D149
Dielectric Breakdown 18400 V
18400 V
1/4" electrode 500 V/sec 25°C in air; ASTM D149
Comparative Tracking Index 400 - 600 V
400 - 600 V
Hot Wire Ignition, HWI 7.0 - 15 sec
7.0 - 15 sec
High Amp Arc Ignition, HAI >= 120 arcs
>= 120 arcs
Descriptive Properties Value Comments
Yield (nominal) 2200 in2/lb
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