Difference Between Polyimide High-Temperature Tape(PI) and PET High-Temperature Tape

Time : 2025-11-14

Item	Polyimide High-Temperature Tape(PI)	PET High-Temperature Tape
Base Material	Polyimide (PI) Film	Polyester (PET) Film
Color	Amber	Brown/Transparent/Blue/Red/Green/White
Adhesive Type	Silicone adhesive (high-temp resistant)	Silicone or acrylic adhesive
Temperature Resistance	-73°C to +260°C (-100°F to +500°F)	-20°C to +180°C (-4°F to +356°F)
Electrical Insulation	Excellent — suitable for H-class or higher insulation	Good — suitable for medium-temperature insulation
Chemical Resistance	Excellent — stable in most solvents and chemicals	Moderate — may degrade in strong solvents
Mechanical Strength	High tensile strength, tear-resistant	Good strength, but less heat stability
Thickness Range	0.025mm – 0.1mm typical	0.025mm – 0.1mm typical
Adhesive Residue After Heating	No residue, clean removal	May leave slight residue under long-term heat
Dimensional Stability	Excellent under heat	Slight shrinkage possible at high temperature
Flame Retardancy	Naturally flame-retardant	Generally non flame-retardant
Cost	Higher	Lower (cost-effective)
Main Applications	PCB masking during wave/reflow soldering; insulation for motors, transformers, and aerospace electronics	Powder coating, painting, plating masking, general surface protection and battery insulation
Typical Industries	Electronics, aerospace, military, semiconductor, high-end electrical	Consumer electronics, general manufacturing, automotive, packaging

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