| 摘要 |
A polyisocyanurate foam laminate produced by admixing a polyisocyanate component and a polyol component and coating the mixture between two flexible sheet substrates. The three-layered laminate is then passed between two substantially immovable barriers which restrict the expansion of the laminate caused by foaming of the reaction mixture as a result of the evaporation and entropment of a blowing agent within the polyisocyanurate closed cell structure. Thus, a board is produced with excellent flame spread and dimensional characteristics suitable for use as insulation in steel deck construction.
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