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Thermal insulation of the loose-fill type rated thermal resistance of R3.75 according to ASTM C 739.
隔热棉R值为3.75.
Density
The maximum density anticipated after long-term settling of dry applications was determined by following specification: ASTM C739: 1.6lb/ft3 (25.6kg/m3) the specified test conditons.
密度：根据ASTMC 739: 1.6lb/ft3 (25.6kg/m3)
其中，标准要求如下：
19.16.1 Thermal insulation of the loose-fill type shall be conditioned to the density specified by the insulation manufacturer to obtain a required rated thermal resistance of Rsi 0.56 to 0.678 (R3.2 to R3.85).
19.16.2 Thermal insulation shall be conditioned, if required, by a blowing or vacuum machine before it is placed around the test luminaire. Density shall be verified by placing insulation into a box of known volume and weight, and then weighing the filled box. The difference in weight between the empty and full box, divided by the volume, shall be the insulation density.
UL1598防火棉
该防火棉用于嵌入式灯具温升测试，热阻值为3.75，为美国进口材料。每袋30lbs。
在放入灯具测试前，应用吹风机或者吸尘器处理。密度应当通过放入一个固定容积和重量的盒子内确定。
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