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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 Z% G1 c! x8 s' l1 R( M( B: D2 x8.4 Classification% \; x5 e+ S# P
The materials shall be classified HB, HB40 or HB75 (HB = horizontal burning) in accordance
d2 i6 r! ^! ?6 |( D3 ywith the criteria given below.
' A+ S* G: d1 x. m5 u( X. j; I) B8.4.1 A material classified HB shall conform to one of the following criteria:3 t$ z! x2 W& W3 K5 A* x- J! R
a) it shall not visibly burn with a flame after the ignition source is removed;
8 ?( s/ i* q5 [( T. E6 ]9 H7 Ob) if the test specimens continue to burn with a flame after removal of the ignition source, the% G3 _ S4 X x% |. b
flame front shall not pass the 100 mm mark;
0 q6 w. C" c1 a3 c- h7 {- z$ _5 c" m- Gc) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding# p4 Y$ ^; s- o- e4 C0 L. ?
40 mm/min for a thickness of 3,0 mm to 13,0 mm or a burning rate not exceeding {4 p9 H9 G! \; W( W# h
75 mm/min for a thickness of less than 3,0 mm;
7 \) P# g/ f- f3 s; D5 a- Dd) if the linear burning rate does not exceed 40 mm/min for tests with 3,0 mm ± 0,2 mm; I+ Z; C' `# d6 v$ a5 V
thickness, it shall automatically be accepted down to a 1,5 mm minimum thickness./ S4 i5 U2 X+ S; b( l. E
8.4.2 A material classified HB40 shall present one of the following criteria:
% Z: q2 x! B* X/ p3 o7 aa) it shall not visibly burn with a flame after the ignition source is removed;( y. d- E7 S; s1 h( z$ ~
b) if the test specimens continue to burn with a flame after removal of the ignition source, it
/ h, H; B$ |! N/ ?shall not have the flame front pass the 100 mm mark;
8 N) K/ o% G- N, g9 Xc) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding$ k& R9 F1 x6 r, \$ q8 H
40 mm/min." C/ g7 b( A0 J% {( B# f
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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