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DuPont Teijin Films Mylar® MO21 Polyester Film, 900 Gauge

Category Polymer , Film , Thermoplastic , Polyester, TP , Polyester Film
Manufacturer DuPont Teijin Films (DTF)
Trade Name Mylar®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF DuPont Teijin Films Mylar® MO21 Polyester Film, 900 Gauge.pdf
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Material Notes:
Product Description: Mylar® type MO21 films are strong, heavy gauge films that have excellent electrical properties. These films offer exceptional cut-through resistance, low shrinkage, low moisture absorption, and high thermal durability. Mylar® type MO21 films are used as insulation in systems that have been given Class B ratings by Underwriters Laboratories (UL). They also offer product uniformity that enhances processing on automatic slot and wedge insertion equipment.The inherit mechanical durability of Mylar® type MO21 films and their good dielectric and thermal durability characteristics endow these films with multiple advantages in motors and generators.Typical Applications: Mylar® type MO21 films are being widely used for electrical insulation in slot liners, wedges and phase insulation for motors and generators. Mylar® type MO21 films are also frequently used in hermetic motor/compressor sealed units, fractional horse power motors, diaphragms, and industrial laminations.Approvals: UL 94 VTM-2 - for 92-1400 gauge (0.023-0.35mm). UL Recognition - for 92-500 gauge (0.023-0.35 mm) 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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