| 摘要 |
<p>A system for sealing off, at least during a fire taking place adjacent a wall, in a virtually entirely flame-tight manner and preferably also smoketight manner, an opening extending through-this wall, through which a transporting device comprising for instance a. cable, duct or pipe has been fed, the system being provided with elements manufactured from a fire-resistant material which expands under the influence of temperature increase, characterized in that the elements are manufactured from a fire-resistant material based on an elastomeric foam of cross-linked Ethylene Vinyl Acetate (EVA) with a substantially closed cell structure, in which foam at least one crust-forming fire-retardant material and a pH neutralized graphite material are incorporated, wherein the crust-forming fire-retardant material has been selected from poly ammonium phosphate and melamine phosphate.</p> |
