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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.
Unit of Measure

Specifications

Thickness

 N/A 750 gauge0.0075 in

Width

 N/A 20 in

Length

 N/A 222 ft

Optical Opacity

 N/A 38 %
Core Inside Diameter1 N/A 3 in

Roll Outside Diameter

 N/A 13 in

Core Inside Diameter (Master Roll)

 N/A 10 in

Weight

 N/A 20 lb

Approvals

 N/A Underwriters Laboratories (UL 94 VTM2) Underwriters Laboratories (UL) Recognition - HWI=4, HAI=0, CTI=1

Electrical Properties

Dielectric Strength

 N/A 17.5 kV

Test Method for Dielectric Strength

 N/A American Society for Testing and Materials (ASTM) D149 1/4" electrode 500 V/sec 25ºC in air

Physical Properties

Density

 N/A 1.3928 g/cm²

Elongation at Break (Machine Direction (MD))

 N/A 140 %

Test Method for Elongation at Break (Machine Direction (MD))

 N/A American Society for Testing and Materials (ASTM) D882A

Elongation at Break (Transverse Direction (TD))

 N/A 115 %

Test Method for Elongation at Break (Transverse Direction (TD))

 N/A American Society for Testing and Materials (ASTM) D882A

Tensile Strength (Machine Direction (MD))

 N/A 27 kpsi

Test Method for Tensile Strength (Machine Direction (MD))

 N/A American Society for Testing and Materials (ASTM) D882A

Tensile Strength (Transverse Direction (TD))

 N/A 30

Test Method for Tensile Strength (Transverse Direction (TD))

 N/A American Society for Testing and Materials (ASTM) D882A

Nominal Yield

 N/A 2600 in²/lb

Thermal Properties

Shrinkage (Machine Direction (MD)) at 150 Degree Celsius (ºC) Temperature

 N/A 1.6 %

Test Method for Shrinkage (Machine Direction (MD)) at 150 Degree Celsius (ºC) Temperature

 N/A Unrestrained at 150ºC/30 min

Shrinkage (Transverse Direction (TD)) at 150 Degree Celsius (ºC) Temperature

 N/A 0.9 %

Test Method for Shrinkage (Transverse Direction (TD)) at 150 Degree Celsius (ºC) Temperature

 N/A Unrestrained at 150ºC/30 min

General Information

General Information

 N/A 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.

Special Features

Special Features

 N/A Slit rolls are available in the following ID and OD configuration:
  • 3" ID 13" OD
  • 3" ID 16" OD
  • 3" ID 18" OD
Master rolls are available as shown in the Standard Put-up table. They are splice free and are available in selected widths in minimum order quantities of 35,000 lb per order with a minimum of 10,000 lb per item.

Typical Applications

Typical Applications

 N/A 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.

Note

Note

 N/A Custom Width available RFQ.
  • 1 6" ID Core available.