ИСТИНА

FIELD: sealing engineering. SUBSTANCE: method comprises applying the perforated metallic foil provided with perforation teeth from one side on the sheet made of thermally expanded graphite from its both sides and joining them by pressing by means of introducing metal teeth into the thermally expanded graphite. The perforated sheet is manufactured by its punching with the grinding angle being from 40 to 65°. The area of the perforated sections is no less than 2% of the total area of the foil. EFFECT: enhanced strength and durability. 1 cl, 10 dwg