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发表于 2012-6-7 11:13:18
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来自： 中国广东深圳
GB-T 2408-2008塑料 燃烧性能的测定 水平法和垂直法 等效采用IEC 60695 11-10：1999 以下是IEC 60695 11-10：2003的相关内容
7 X! D) E9 w% H4 P! \& j8.4 Classification
0 A- Q% @1 t& S2 H! HThe materials shall be classified HB, HB40 or HB75 (HB = horizontal burning) in accordance
, J: E3 b1 c1 n* Twith the criteria given below.- |# B: J% e" f- n1 r/ s% K
8.4.1 A material classified HB shall conform to one of the following criteria:
' O) N4 [+ }2 ^, D( x, p9 Ha) it shall not visibly burn with a flame after the ignition source is removed;+ r0 s5 z/ s7 [' n; X9 x# L9 f5 Q: C$ {- F
b) if the test specimens continue to burn with a flame after removal of the ignition source, the; o% M( E8 w4 r, C5 q. s+ i
flame front shall not pass the 100 mm mark;3 a! Q2 R8 j! ~
c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding, e$ M7 v# v* r1 i1 ^% M6 ]3 [' [! e
40 mm/min for a thickness of 3,0 mm to 13,0 mm or a burning rate not exceeding, H8 ^: c/ Q9 ]2 w
75 mm/min for a thickness of less than 3,0 mm;
/ g! V7 R/ S pd) if the linear burning rate does not exceed 40 mm/min for tests with 3,0 mm ± 0,2 mm( @$ {/ K8 p% }" j; ]
thickness, it shall automatically be accepted down to a 1,5 mm minimum thickness.
( z$ M1 a" j$ h4 k' i# T1 @8.4.2 A material classified HB40 shall present one of the following criteria:7 |. H9 G: T( ?
a) it shall not visibly burn with a flame after the ignition source is removed;
. O5 [ f5 p" Vb) if the test specimens continue to burn with a flame after removal of the ignition source, it8 D+ d' I' C+ J( e5 f- s1 G2 x4 x* d
shall not have the flame front pass the 100 mm mark;9 ^0 K$ Z! \$ R/ P9 t3 P9 u
c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding
* T. _) }, m% d$ g: q* b40 mm/min.- L0 m i/ |! B2 O9 L) a
8.4.3 A material classified HB75 shall not have a linear burning rate exceeding 75 mm/min, if the flame front passes the 100 mm mark. |
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发表于 2012-6-7 11:08:30
发表于 2012-6-12 14:25:55
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