火灾危险测试 第 11-10 部分：测试火焰； 50 W水平和垂直火焰测试方法

[中文适用范围]： 本标准规定了塑料和菲金属材料试样处于 50 瓦火焰条件下，水平或垂直方向燃烧性能的实验测定方法。 本标准规定了线性燃烧速率和余焰/余辉时间以及试样的燃烧长度的测定。 本标准适用于按 GB/T 6343 测定的表观密度不低于 250 kg/m³的固体以及泡沫材料，不适用于施加火焰后未点燃而产生卷缩的材料；对于薄而软的材料应使用 ISO 9773。 本标准规定了燃烧性能等级（见 8.4 和 9.4），可用于质量保证或产品组成材料的预选。当试样厚度等于材料应用时的最小厚度时可获得可靠的结果。 注：试验结果受材料组分的影响，如颜料填料和阻燃剂，以及如各向异性及分子量的影响。 [外文原描述]： Specifies a small-scale laboratory screening procedure for comparing the relative burning behaviour of vertically or horizontally oriented specimens made from plastic and other non-metallic materials, exposed to a small-flame ignition source of 50 W nominal power. These test methods determine the linear burning rate and the afterflame/afterglow times, as well as the damaged length of specimens. Applicable to solid and cellular materials that have an apparent density of not less than 250 kg/m3, determined in accordance with ISO 845. They do not apply to materials that shrink away from applied flame without igniting; ISO 9773 should be used for thin flexible materials. The test methods described provide classification systems which may be used for quality assurance, or the pre-selection of component materials of products. May be used for the pre-selection of a material, providing positive results are obtained at a thickness equal to the smallest thickness used in the application. Has the status of a basic safety publication in accordance with Guide 104.