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Description:
[China ]
polyimide film Structure and property Our polyimide film is produced by polymerizing and casting pyromellitic dianhydride and 4, 4diaminodiphenylether to form H-grade insulating film. Polyimide film is widely used for electrical and electronic appliances with properties of heat resistance (-269C ~ +400C),chemical resistance(almost no organic or inorganic solvents except caustic alkali),dielectric, flame retardant, physical, mechanical and compounded with many materials performances. Its properties as below: 1. Good properties of insulation and tensile strength. 2. Good temperature resistance and used in wide temperature range, between-60C~+250C for long time, between -269C ~-60C and +250C~+400C for short period without changing its tensile strength or insulating properties. 3. Good chemical stability and resistance to corrosion. 4. Excellent flame retardant property. 5. Good radioresistance. After the film being irradiated with γ ray of 109 rad, its properties remain unchanged 6. Can be mixed with many materials, when coated with fluorine resin , moisture protection and corrosion resistance are greatly improved. Size: Thichness0.025-0.175mm, width16-520mm Specifications: 1) Physical and chemical performance: a. Thickness tolerance: ≤ 10%, b. Density: 1.40-1.44g/cm3, c. Tensile strength: lengthwise ≥200MPa, crosswise ≥ 150MPa d. Elongation (lengthwise/crosswise): ≥ 70% 2) Dielectric performance: a. Dielectric strength(20 C): ≥150KV/mm, b. Dielectric coefficient: ≤ 4, c. Tangent of dielectric loss angle: ≤ 0.004, d. Volume resistivity(Ohm.m): ≥1X1010 (at 200C) , surface resistivity: ≥1X 1013(at 200C). 3) Heat resistance performance: a. Melt point (C): without, b. Heat shrinkage (at 200 C): ≤0.4%, c. Flammability: difficult to burn, self-quenching. d. Thermal resolution temperature: ≥ 470 C. 4) Chemical resistance: With strong corrosion resistant capability, our polyimide film can withstand the solution of any organic solvent. Except for caustic alkali, no any inorganic acid and alkali can make up corrosion on the film but a little boss in mechanical strength may be performed. Uses: Extensively used in the field of space flight, aeronautics, navigation and nuclear industry, also used in traction motor of locomotive, diving oil motor and various H-grade high temperature-resistant motor for mine, capacitor, as well as wrap insulation for high temperature cable, electromagnetic line, and can make composite film, flexural Cu-metallization plate, soft printing board etc.
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