| 摘要 |
<p>The multilayered film comprises a base layer of high-purity raw material for films for use in the electrical sector, and outer layers on one or both sides. It is suitable as an electrical insulation film, in particular as a dielectric in an electrical capacitor, and has dielectric properties which are improved for this purpose. The base layer and the outer layer(s) contain propylene polymers and stabilisers for the propylene polymers. The raw material of the base layer has an idealised thermooxidation temperature in the range from 260 to 300 DEG C, preferably from 260 to 280 DEG C, and the raw material of the outer layer(s) has an idealised thermooxidation temperature in the range from 240 to 300 DEG C, preferably from 240 to 270 DEG C. The multilayer film as a whole has an idealised thermooxidation temperature of from 250 to 290 DEG C, in particular from 250 to 275 DEG C. The content of organic neutralisers, in particular calcium stearate, in the raw materials is less than or equal to 100 ppm. </p> |
