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Mylar® and Melinex® Polyester Films

Silver star mirrorized Mylar film Rolls of Mylar polyester film

High-performance biaxially-oriented PET films used for electrical, industrial, packaging, and thermal barrier applications.

Key Properties

PropertyTypical ValueUnits
Thickness Range12 – 350microns (0.5–14 mils)
Density1.39g/cm³
Melting Point255 – 260°C
Glass Transition Temp (Tg)~78°C
Use Temperature (Max)150°C continuous
Dielectric Strength~180kV/mm
Light Transmission>85% (clear grades)

Common Applications

Electrical insulation: slot liners, motor wraps, and cable layers
Capacitor film & flexible printed circuits
Solar panel back sheets and reflectors
Food and medical packaging (FDA-compliant grades)
Overlays for membrane switches and ID cards
Battery insulation for lithium-ion cells
Industrial masking and thermal barriers
Printing, labeling, laminates

Available Grades

Mylar® A: general-purpose, clear
Mylar® D: electrical insulation
Melinex® 516: FDA-compliant
Melinex® ST Series: heat-stabilized, shrink-resistant
Polyester Resin Data

Related Links

Mylar® is a registered trademark of DuPont Teijin Films.