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谁做过IEC 60950-22 Equipment to be installed outdoors中的附录D Gasket tests?+ a3 d( F8 a3 Z* b7 j# ]( [
/ ?- h! R0 O+ F; x% Y d其中的5 j' Y, t2 h# a2 p
D.2 Tensile strength and elongation tests7 @5 n' Q% q. s: a u* k$ M* y! T
This test is applicable to gaskets, which can stretch (such as O-rings). Gasket material, shall
/ h( f1 W" v+ p( s( U7 n- e5 Kbe of such quality that samples subjected to a temperature of 69 °C to 70 °C in circulating air
1 g9 {- ~ a W3 r4 rfor 168 h have a tensile strength of not less than 75 % and an elongation of not less than1 P/ ~" M {9 d0 @ {( N4 P" }
60 % of values determined for unaged samples. At the conclusion of the tests, there shall be1 A$ V& G9 h* K- W* E5 Y9 Y+ _
no visible deterioration, deformation, melting, or cracking of the material and the material
- {+ @6 @" B2 Q& m) zshall 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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