| abstract |
An electro-magnetic wave shielding gasket having a polyurethane foam and an electroconductive cloth covering the foam, wherein the polyurethane foam comprises 100 parts by weight of a base resin prepared by reacting a polyol with an isocyanate, 10 to 35 parts by weight of an expandable graphite and 15 to 45 parts by weight of melamine, and the volume of the polyurethane foam after the heating at 260 ˚ C for 10 minutes is 0.4 times or more that before heating and the volume of the polyurethane foam after the heating at 300 ˚ C for 10 minutes is 1.4 times or more that before heating. |