| 摘要 |
PURPOSE: A flame blocking system and a construction method thereof are provided, which effectively prevents flame and toxic smoke from moving through an opening between partition walls. CONSTITUTION: A flame blocking system comprises: a nonflammable foam body(30) having a penetration hole; and a fire retardant tube(40) passing through the penetration hole of the nonflammable foam body. The nonflammable foam body includes polyurethane foam, graphite, aluminum hydroxide, and ammonium phosphate. Graphite is 20-75 parts by weight, aluminum hydroxide is 14-50 parts by weight, ammonium phosphate is 3-25 parts by weight against polyurethane foam 100 parts by weight. |
