Polyimide Film
Structure and properties:
Our polyimide film is high-temperature formed by polymerizing and
casting pyromellitic acid dianhydride and 4, 4'oxydianiline with dimethylacetamide as an intermedium to form H-grade insulating film.
Polyimide film is widely used for electrical and electronic appliances.
It is heat resistant(-269 oC~+400oC),chemical
resistant (resistant to almost all organic and inorganic solvents except
for caustic alkali), dielectric, flame retardant and can be compounded
with many other materials.

Its properties as below:
Size: Thickness: 0.025-0.225mm, width: 16-1040mm

Specifications:
1) Physical and chemical performance:
a) Thickness tolerance: ≤ 10%,
b) Density: 1.40-1.44g/cm3
c) Tensile strength: lengthwise ≥ 145MPa, crosswise ≥ 130Mpa
d) Elongation (lengthwise/crosswise): ≥ 60%
2) Dielectric performance:
a) Dielectric strength: ≥ 150KV / mm
b) Dielectric coefficient: ≤ 4
c) Tangent of dielectric loss angle: ≤ 0.004
d) Volume resistance: ≥ 1010 (at 200oC)
e) Surface resistance: ≥ 1013 (at 200oC)
3) Heat resistance performance:
a) Melt point (oC): without
b) Heat shrinkage (at 200oC): ≤0.4%
c) Flammability: difficult to burn, self-quenching
d) Thermal resolution temperature: ≥ 470oC.
4) Chemical resistance:
With strong corrosion resistant capability, our polyimide film can
withstand the solution of any organic solvent. Except for caustic
alkali, no inorganic acid or alkali corrode the film but a little
loss of mechanical strength may result.

Uses:
Extensively used in the fields of space flight, aeronautics and
navigation as well as the nuclear industry, also used in locomotive

traction motors, diving oil motors and various H-grade
high-temperature-resistant motors for mines, and capacitors. It is
used as well for wrap insulation for high temperature cable,
electromagnetic line, and can also make composite film, flexible
copper-metallized plate, flexible printing board, etc.

Polyimide film is widely used for electrical and electronic appliances
due to its properties of heat resistance (60 ~ 250oC for
long periods), chemical resistance (resistant to almost all organic
and inorganic solvents except for caustic alkali), and because it is dielectric, flame retardant and can be compounded with many materials.

Packing:
Plastic foam as inside liner, then packed in paper board carton