Songhan Plastic Technology Co.,Ltd.

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 %
Film Elongation at Break, TD 130 %
130 %
Film Tensile Strength at Break, MD 186 MPa
27000 psi
Film Tensile Strength at Break, TD 200 MPa
29000 psi
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
Shrinkage, TD 1.1 %

@Temperature 150 °C,
Time 1800 sec
1.1 %

@Temperature 302 °F,
Time 0.500 hour
Optical Properties Metric English Comments
Refractive Index 1.64 - 1.67
1.64 - 1.67
typical of Mylar®
Optical Density 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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