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JIS K6767测试——

 

JIS K 67671976 泡沫塑料.聚乙烯性能测试

Test item (Clause)

Number of specimens

Figures of test result

5.1Apparent density密度测试g/cm2

Not less than 15 cm3

Calculate the density in g/cm2

5.2Tensile strength断裂强力kgf/cm2 (N/ cm2)

Elongation断裂伸长率%

5pcs 120*25*10mm(method A)

5pcs 50*50*10mm(method B)

Method A or method B

5.3Hardness in compression压缩硬度 kgf/cm2 (N/ cm2)

3pcs 50*50*25mm

At 10mm/min by 25% of the initial thickness and stop compression, the measure the load after 20s Calculation the hardness in compression by load after 20s and the specimen width and length.

5.4Permanent set in compression 抗压系数%

3pcs 50*50*25mm

compress specimen by 25% of the thickness of the test piece and fix, at 20±2 and 65±5% RH. For 22h

5.5Creep in compression %

9pcs 50*50*25mm

Measure the charge in thickness at four times,1h, 24h, 96h and 168h after applying the load.

5.6Tearing strength 撕裂强度kgf/cm (N/ cm)

5pcs 100*35.5*10mm

At 500mm/min until the test piece break, and measure the maximum load at the time of break.

5.7Dimensional change on heating热缩性%

3pcs 150*150*?mm

At air oven 70,heat it for 22h, leave it at20±2 and 65±5% RH. for 1h, calculation the rate of dimensional change on heating S(%)

Reference IIWater absorption吸水率 (g/cm2 ,g/cm3)                       

3pcs 120*120*25mm

Method A: Calculate the water absorption Qs(g/cm2)

Method B: Calculate the water absorption Qv( g/cm3)

 


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