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Test standard * | Measured value | Standard value | |
Thickness tolerance | IEC 641-2 | ±10 % | ±10 % |
Apparent density | IEC 641-2 | 1.1 g/cm³ | 1.0 - 1.2 g/cm³ |
Min. tensile strength M.D, unfolded | IEC 641-2 | 90 N/mm² | 80 N/mm² |
Min. tensile strength C.M.D, unfolded | IEC 641-2 | 50 N/mm² | 40 N/mm² |
Min. elongation M.D, unfolded | IEC 641-2 | 6.50% | 6% |
Min. elongation C.M.D, unfolded | IEC 641-2 | 13% | 12% |
Max. moisture content | IEC 641-2 | 8% | 8% |
Max. ash content | IEC 641-2 | 0.50% | 1% |
pH of aqueous extract | IEC 641-2 | 7-9 | 6-9 |
Max. shrinkage M.D | IEC 641-2 | 0.70% | 1% |
Max. shrinkage C.M.D | IEC 641-2 | 1.20% | 1.50% |
Max. thickness shrinkage | IEC 641-2 | 5% | 7% |
Min. oil absorption | IEC 641-2 | 25% | 12% |
Min. breakdown voltage in air, unfolded, normalized | IEC 641-2 | 10 kV/mm | 9 kV/mm |
Min. breakdown voltage in oil | IEC 641-2 | 60 kV/mm | 40 kV/mm |
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