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OwnerHolger Kliesch, Gottfried Hilkert +3inventors
InventorsHolger Kliesch, Gottfried Hilkert, Ursula Murschall, Annegrete Bursch, Guenther Crass
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The invention relates to a flame-retardant oriented thermoplastic film with a thickness in the range from 0.5 to 12 μm. The film comprises at least one flame retardant and has a conductive coating. This film may also possess at least one functionality additional to the flame retardancy. The expression “additional functionality” comprehends the shrinkage and the solderability. All films of this kind feature low flammability and good dielectric properties. In particular, they have a high tracking resistance and a low dissipation factor, and may also have one or more further functionalities. The invention additionally relates to a process for producing the polyester film and to its use in film capacitors.
A biaxially oriented, flame-retardant film which comprises a crystallizable thermoplastic as main constituent and which film has a thickness in the range from about 0.5 to about 12 μm, has AC electrical tracking resistance of ≧about 200 kV/mm and a roughness Ra≦about 150 nm, and comprises at least one flame retardant and has a conductive coating.
Dependencies are inferred from the claim text.