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OwnerHolger Kliesch, Thomas Heusel +5inventors
InventorsHolger Kliesch, Thomas Heusel, Franz Hora, Thorsten Kiehne, Bodo Kuhmann, Gottfried Hilkert, Christopher Hanold
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The invention relates to a biaxially oriented, hydrolysis-resistant film comprising a crystallizable thermoplastic, with a thickness in the range from 0.5 to 12 μm. The film comprises at least one hydrolysis retardant, has a conductive coating and is notable for its low hydrolysis speed and its good dielectric properties. The film may possess at least one functionality additional to the hydrolysis resistance. In particular, it has 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 film and to its use.
A biaxially oriented, hydrolysis-resistant film which comprises a crystallizable thermoplastic as main constituent and which film has a thickness in the range from about 0.5 to about 12.0 μm, wherein the film has an AC electrical tracking resistance of ≧about 190 kV/mm, comprises at least one hydrolysis stabilizer and has a conductive coating.
A process for producing a biaxially oriented, hydrolysis-resistant 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, which comprises extruding a crystallizable thermoplastic and a hydrolysis stabilizer to give a flat melt film, quenching the film, and drawing off the resultant substantially amorphous film for solidification on one or more rolls, then biaxially stretching (orienting) the film and heat-setting the biaxially stretched film and winding the film up and providing it with a conductive coating.
Dependencies are inferred from the claim text.