Water absorption( 2mm) £º15mg Flexuralstrength£ºAt rom temp.-355MPa laminations£º155¡ãC ¡Ã2 ¡ãC--280MPa Impact strength£¬parallel to laminationsharpy, notch£º42kJ/m² Electric strength£¬perpendicular to laminations ( 3mm )£¬in transformer oil at ÃÃ90¡ãC ¡à 2¡ãC£º13kV/mm Dielectric breakdown voltage£¬parallel to lamination ( 25 mm )£¬in transformer oil atÃÃ90 ¡ãC ¡Ã2¡ãC£º48kV Dielectric dissipation factor48 ¨C 62 Hz£º0.03 Dielectric constant [¦Ãr ] £º4.9 Insulator resistivity after immersion£º6*10³G& Comparative tracking index£º¡à 600 Flammability £º-- Temperature Index£º200¡ãC