| 摘要 |
The present invention relates to an arrangement related to such fire-protective doors that comprise two panels 7, 8 of metal plate or similar refractory material arranged at an inter-distance and joined together at their edge portions, and forming a cavity 9 filled with heat-insulating material. The new is to be found in that the heat-insulating material comprises at least one sheet 14 of preferably foam plastic material, adequately of polyurethane type, and that at least one panel facing towards a compartment delimited by the door 1 and implying a risk of fire, but preferably both panels 7, 8 of metal plate or similar, is provided with at least one opening 16 and 17, respectively, closed by a plug or similar 18 and 19, respectively, and adapted to exposing the opening when exposed to a temperature caused by fire and exceeding a predetermined value, related to the temperature at which there is a risk of the insulating material emitting gas, for thereby forming an outlet for said gas, directed towards the fire. <IMAGE> |
