ASTM D 3574测试——
ASTM D 3574:2005—海绵物理性能测试
Test item
No. of specimens
Figures of test result
Test A—Density 密度测试（ kg/m3）
3pcs mm
Calculate the density in kilograms per cubic metre
Test B1—IFD 硬度 （N）
3pcs 380*380*100mm
The force in newtons required for 25% and 65% indentations
Test B2—IFD-specified force
指定力下的硬度 (N)
3pcs 380*380*实际厚度 mm
The thickness after 60±3s at 4.5N,110N and 220N
Test C—Compression force deflection test 压缩系数
3pcs 50*50*25mm
Compress the specimen 50% of the thickness at 50mm/min and determine the final force after 60±3s
Test D—Constant deflection compression set test 压缩永久变形（%）
3pcs 50*50*25mm
Place the specimen and deflect it to either 50% 75% or 90% of its thickness, at air oven 70±2℃ and 6% RH. For 22
Test E—Tensile/Elongation test拉伸强度(kgf/cm2)/伸长率(%)
3pcs 25.4*mm
At 500mm/min, Calculate the tensile strength by dividing the maximum breaking force by the original cross-sectional area of the specimen
Test F—Tear resistance test
撕裂强度(N/m)
3pcs 4mm
At 500mm/min tear strength in newtons per meter
Test I1—Fatigue test :static force loss test at constant deflection 静态疲劳测试
3pcs 380*380*实际厚度mm
Percentage loss of thickness and the percentage loss
of 25 and 65 % IFD if the thickness loss is less than 10 %
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