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各位同学，4 h5 j9 V5 q$ c W5 X# ^& |
UL1598,第16章垫片加速老化测试，评估垫片的张力和伸长率，各位是用多大的力去拉的？
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16.5.9 Gasket accelerated aging (Method A)* O) Q3 b% h( p
16.5.9.1 A gasket or bushing shall be subjected to the gasket accelerated aging test.
+ c1 \; L5 e4 ]3 F D/ k6 a16.5.9.2 Three specimens of the gasket or bushing material shall be evaluated for tensile strength and
3 k, A e5 o" R( U" Z* ~0 Oelongation, and the average values calculated., H# {# R* t/ b: t
16.5.9.3 Three additional specimens shall be conditioned for 168 h in a circulating air oven at a$ S! u9 b9 W4 f* [
temperature 20 °C above the maximum gasket or bushing temperature as determined by the normal/ R, P/ R$ h3 T' U+ \7 k" V
temperature test of Clause 14.
@- A, R% z: l* Z" o9 A16.5.9.4 After conditioning, the 3 specimens shall have an average tensile strength of not less than 60* s" `5 l" f! v& \7 r' b: c
percent and an average elongation of not less than 75 percent of the values determined before3 t# {9 g. k# t6 b
conditioning.4 h6 D- A- f# H; |4 S$ ?9 P( F: ~
' I: ~" N. v" X; E' ~8 J2 r" L2 \谢谢！
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发表于 2013-11-1 15:48
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