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谁做过IEC 60950-22 Equipment to be installed outdoors中的附录D Gasket tests？
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其中的
1 g' @1 N0 S3 t8 z; N& L0 tD.2 Tensile strength and elongation tests
& @* m# t6 F o% iThis test is applicable to gaskets, which can stretch (such as O-rings). Gasket material, shall
$ ?% g% \8 ~2 u3 w- ^1 Q' Pbe of such quality that samples subjected to a temperature of 69 °C to 70 °C in circulating air+ R r* ~$ v+ j9 {! @. W
for 168 h have a tensile strength of not less than 75 % and an elongation of not less than
0 `0 m3 r9 u% ~60 % of values determined for unaged samples. At the conclusion of the tests, there shall be
+ l* E' X( h: Vno visible deterioration, deformation, melting, or cracking of the material and the material
) Y3 [" z( u! H8 T+ wshall not harden as determined by normal hand flexing.
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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。 |
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发表于 2009-2-17 14:54
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