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Master Bond adhesives

DuPont Teijin Films Mylar® MO21 Polyester Film, 750 Gauge
Categories: Polymer; Film; Thermoplastic; Polyester, TP; Polyester Film

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=1

Information provided by DuPont.

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Physical PropertiesMetricEnglishComments
Density 1.3928 g/cc0.050318 lb/in³
Thickness 191 microns7.50 mil
 
Mechanical PropertiesMetricEnglishComments
Film Elongation at Break, MD 140 %140 %ASTM D882A
Film Elongation at Break, TD 115 %115 %ASTM D882A
Film Tensile Strength at Break, MD 186 MPa27000 psiASTM D882A
Film Tensile Strength at Break, TD 207 MPa30000 psiASTM D882A
 
Electrical PropertiesMetricEnglishComments
Dielectric Strength 91.85 kV/mm2333 kV/in1/4" electrode 500 V/sec 25°C in air; ASTM D149
Dielectric Breakdown 17500 V17500 V1/4" electrode 500 V/sec 25°C in air; ASTM D149
Comparative Tracking Index 400 - 600 V400 - 600 V
Hot Wire Ignition, HWI 7.0 - 15 sec7.0 - 15 sec
High Amp Arc Ignition, HAI >= 120 arcs>= 120 arcs
 
Thermal PropertiesMetricEnglishComments
Specific Heat Capacity 1.17 J/g-°C0.280 BTU/lb-°FTypical Mylar®
Melting Point 254 °C489 °FTypical 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 0.90 %
@Temperature 150 °C,
Time 1800 sec
0.90 %
@Temperature 302 °F,
Time 0.500 hour
Unrestrained
 
Optical PropertiesMetricEnglishComments
Refractive Index 1.64 - 1.671.64 - 1.67typical of Mylar®
Optical Density 3838
 
Descriptive Properties
Yield (nominal)2600 in2/lb

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PDTZ9378 / 139698

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