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发表于 2012-6-7 11:13:18
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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
1 M4 D' r1 j; s+ W8.4 Classification* {9 b) e9 l& G! j) A' F5 O& o
The materials shall be classified HB, HB40 or HB75 (HB = horizontal burning) in accordance6 h4 A/ a) h0 w: D7 z
with the criteria given below." @8 r/ P# k) T+ }0 j
8.4.1 A material classified HB shall conform to one of the following criteria:
# B5 T* \5 ~0 z0 j) ]) e8 aa) it shall not visibly burn with a flame after the ignition source is removed; L& V/ ^5 G" B' h
b) if the test specimens continue to burn with a flame after removal of the ignition source, the2 B6 {" G8 e. z2 C# a6 B
flame front shall not pass the 100 mm mark;; u- k) D; V% _' X
c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding# q: ]' a1 }4 V% L( R
40 mm/min for a thickness of 3,0 mm to 13,0 mm or a burning rate not exceeding) I* S* @6 u6 |6 x1 y
75 mm/min for a thickness of less than 3,0 mm;, s! T/ o3 \$ K
d) if the linear burning rate does not exceed 40 mm/min for tests with 3,0 mm ± 0,2 mm
" t0 l2 O4 w4 K% w7 ]* I: qthickness, it shall automatically be accepted down to a 1,5 mm minimum thickness.! ~; s1 u6 R" R/ f( |
8.4.2 A material classified HB40 shall present one of the following criteria:6 v: K% c7 V1 R+ n3 o9 v3 N5 e1 U$ U
a) it shall not visibly burn with a flame after the ignition source is removed;
( }, T, o+ `2 b4 Nb) if the test specimens continue to burn with a flame after removal of the ignition source, it
) _( N1 l5 h$ J+ Z* C0 wshall not have the flame front pass the 100 mm mark;
) x0 z) h- B" P. @c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding7 ^* m3 O) c y: C* L( m
40 mm/min.
( K/ l2 r) O2 T# o; P& @+ v' d8.4.3 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
:):)