someone 发表于 2009-2-17 14:54

IEC 60950-22附录D的测试问题

谁做过IEC 60950-22 Equipment to be installed outdoors中的附录D Gasket tests？

其中的
D.2 Tensile strength and elongation tests
This test is applicable to gaskets, which can stretch (such as O-rings). Gasket material, shall
be of such quality that samples subjected to a temperature of 69 °C to 70 °C in circulating air
for 168 h have a tensile strength of not less than 75 % and an elongation of not less than
60 % of values determined for unaged samples. At the conclusion of the tests, there shall be
no visible deterioration, deformation, melting, or cracking of the material and the material
shall not harden as determined by normal hand flexing.

这里抗拉强度和伸长率怎么测定？试验方法如何？有参考标准吗？950-22这部分讲的太含糊了。

someone 发表于 2009-2-18 11:10

没人做过抗张强度试验吗？

hdf590 发表于 2009-2-18 22:29

参照标准UL157 Gaskets and seals

sunff2008 发表于 2010-1-10 18:06

我也困惑这个问题

豆浆油条 发表于 2010-1-12 19:18

没做过抗张强度试验

mutou217 发表于 2012-10-23 16:29

是否所有的密封作用的材质都要做附录D的所有测试？
如果使用的材质本身就不能够拉伸呢？
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