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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
2 g) a' w; I) c& uD.2 Tensile strength and elongation tests/ K0 C8 M3 V1 i1 b3 o& j; q
This test is applicable to gaskets, which can stretch (such as O-rings). Gasket material, shall/ H. I& p% Q9 T) X& s
be of such quality that samples subjected to a temperature of 69 °C to 70 °C in circulating air: V8 b9 Q5 n0 o1 B1 R% [
for 168 h have a tensile strength of not less than 75 % and an elongation of not less than- C' D7 Q4 f% C: P* f
60 % of values determined for unaged samples. At the conclusion of the tests, there shall be2 G% M5 Y" H4 Z+ p' M$ h! ~
no visible deterioration, deformation, melting, or cracking of the material and the material& g4 v1 @1 g% T' R |
shall not harden as determined by normal hand flexing.( @ b2 D: w- \& N6 l" N
9 r7 T& n/ g0 b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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