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谁做过IEC 60950-22 Equipment to be installed outdoors中的附录D Gasket tests?# w- j/ |- @$ ]7 y
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其中的, N) A D+ o9 c
D.2 Tensile strength and elongation tests
! M4 ]% p# X8 ^5 [( X- hThis test is applicable to gaskets, which can stretch (such as O-rings). Gasket material, shall0 {5 [! X& u! x s7 w) a$ m( D
be of such quality that samples subjected to a temperature of 69 °C to 70 °C in circulating air2 L& }& U+ `; I: |# [+ W8 o
for 168 h have a tensile strength of not less than 75 % and an elongation of not less than
Z1 U: U: |; K F60 % of values determined for unaged samples. At the conclusion of the tests, there shall be% j# I3 T& f/ P) z
no visible deterioration, deformation, melting, or cracking of the material and the material& _$ K. g t& M$ h
shall 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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