Antistatic aromatic polyimide film
AssigneeE. I. Du Pont de Nemours and Company
InventorDarrell Joe Parish
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Abstract
An antistatic aromatic polyimide film containing from 14 to 50% by weight of electrically conductive silica particles coated with a layer of antimony-containing tin oxide and having a surface resistivity ranging from 10.sup.4 to 10.sup.12 ohms/square. The polyimide film exhibits excellent antistatic properties even after heat-treatment at high temperatures of 400.degree. C. or above, while maintaining good heat resistance and mechanical properties. The polyimide film can be used in various applications requiring good antistatic properties such as copier belts, space blankets and flexible circuit substrates.
Claims14
An antistatic aromatic polyimide film comprising an aromatic polyimide film having dispersed therein from 14 to 50% by weight, based on the weight of the polyimide, of electrically conductive silica particles coated with a layer of antimony-containing tin oxide, wherein the amount of antimony range from 1 to 20% by weight of the tin oxide, to provide a surface resistivity of from 10.sup.4 to 10.sup.12 ohms/square.
Dependencies are inferred from the claim text.