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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
' Y! z& r& t$ t1 U. y& U8.4 Classification
% A) a/ h' ~1 K- s1 z4 Z7 ~% n" H* VThe materials shall be classified HB, HB40 or HB75 (HB = horizontal burning) in accordance. h3 n8 F( Z& O6 |( U) E
with the criteria given below./ Q* |; v* y) c- t+ b
8.4.1 A material classified HB shall conform to one of the following criteria:, _! u+ s7 E* T% }$ z; g
a) it shall not visibly burn with a flame after the ignition source is removed;' F! A! V5 S! c: X2 b2 r# l& B' g
b) if the test specimens continue to burn with a flame after removal of the ignition source, the) n. H2 x9 S; x( w( {
flame front shall not pass the 100 mm mark;8 C/ Z% V4 K/ C1 [
c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding; P. B$ [3 ~3 u" V
40 mm/min for a thickness of 3,0 mm to 13,0 mm or a burning rate not exceeding5 T. D- p. T5 @1 j) Y; b% I4 s$ L
75 mm/min for a thickness of less than 3,0 mm;
, [4 r- e4 ?; Z: j" \d) if the linear burning rate does not exceed 40 mm/min for tests with 3,0 mm ± 0,2 mm+ ^3 @1 O- S P; g1 [# x! z$ ~
thickness, it shall automatically be accepted down to a 1,5 mm minimum thickness.0 F& R& W% L$ d% f+ ^% f
8.4.2 A material classified HB40 shall present one of the following criteria:
; ]( W/ ~; R9 F- |a) it shall not visibly burn with a flame after the ignition source is removed;3 r& M- V7 ~" V; j& @" i$ N1 h8 s5 f
b) if the test specimens continue to burn with a flame after removal of the ignition source, it! i: t) `) \1 ~7 U: G. r
shall not have the flame front pass the 100 mm mark;+ u+ Q. F; O) @
c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding
) b' w' k; ~1 ]# g. z; A' Q9 t40 mm/min.
9 }# a( V8 v+ n. M# X- h0 r; R8.4.3 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
:):)