Test item

No. of specimens

Figures of test result

Test A—Density 密度测试（ kg/m3）

3pcs 100*100*100mm

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（厚度大于50mm）

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在压缩50%的情况下保持1分钟,看读数的值

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

在以上压缩比例任选一个,温度70度,湿度6%,放置22小时,看海绵的恢复情况

Test E—Tensile/Elongation test拉伸强度(kgf/cm2)/伸长率(%)

3pcs 25.4*139.7*12.5mm

见FIG. 1

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 152.4*25.4*25.4mm

见FIG. 2

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（厚度大于50mm）

Percentage loss of thickness and the percentage loss

of 25 and 65 % IFD if the thickness loss is less than 10 %

如果硬度损失小于10%,应该考查25%和65%的损失的百分比