Abstract
The testing of the smoldering resistance of cellulosic insula tion has been included as a new requirement in the proposed "D" version of the Federal Specification HH-1-515. Using the proposed testing method ology, a series of tests has been performed to determine: (1) the character istics of smoldering as observed in the test, (2) the effects of various test parameters, (3) the effects of various base materials (paper), (4) the effects of smoldering combustion on various chemical additives, and (5) the ef fects of various chemical additives on smoldering. The results of these tests, though preliminary, provide guidance for selection of chemical additives for smolder resistance and for possible modification of the testing proce dure. The test results also provide direction for further Research and Devel opment in the area of smolder resistant insulation materials.
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