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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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: f6 ^% G" r+ o! P6 z3 _其中的
! I" }8 w0 H% f: H* n. p2 |D.2 Tensile strength and elongation tests
& v& @# c6 q) X$ u- V6 P8 D$ oThis test is applicable to gaskets, which can stretch (such as O-rings). Gasket material, shall3 C' o; i: z( k2 }
be of such quality that samples subjected to a temperature of 69 °C to 70 °C in circulating air
0 H) b0 M9 G8 F6 O7 Ofor 168 h have a tensile strength of not less than 75 % and an elongation of not less than
0 w0 u; h+ J, j& U% b+ ~ z60 % of values determined for unaged samples. At the conclusion of the tests, there shall be. ?" L& L6 @$ |' V" X; Q
no visible deterioration, deformation, melting, or cracking of the material and the material
" f' S f9 U* Cshall not harden as determined by normal hand flexing.) A( N. W, ]1 P1 @! @
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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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