| abstract |
Ventilation grille (1) for preventing the passage of fire and smoke in case of fire from one room to another, wherein the ventilation grille is composed of a plurality of intersecting grid ribs (2, 3, 4, 5) and consists of a composition comprising at least one in the case of fire, the foaming agent and a binder contains, characterized in that the intumescent in case of fire active ingredient is selected from expandable graphite and / or expandable silicate material and the binder is a thermoplastic polymer. |