ASTM D635塑料在水平状态时的燃烧速率或者燃烧蔓延程度及燃烧时间的标准试验方法
日期:2012-02-08 10:46
that sheet materials that have been stretched during processing will relax during burning and give erratic results unless they are first heated above their deflection temperature, in accordance with Test Method D648, for a time sufficient to permit complete relaxation.
Burning tests require that certain variables be arbitrarily fixed, for example, specimen size, energy source and application time, and end points. Materials will be found that are unusually sensitive to one or more of the condit
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