NF T51-073：塑料.防火性能.烟密度测试法
日期:2010-10-18 00:00
0C) to obtain a plot of specific optical density for various materials which broadly corresponds with general experience and certain other smoke tests.
The plots show that nearly all flammable substances give a rapid rise in smoke opacity in the 350500C region above which there is always a steep drop sometimes to smoke densities of virtually zero. Apart from one or two synthetic materials which show a very low smoke density through-out, there is no general trend as between natural and synthet
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