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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 t' p- I4 l' C( ~8.4 Classification
, y4 n. N' n% d2 NThe materials shall be classified HB, HB40 or HB75 (HB = horizontal burning) in accordance
/ ]% G' }3 S( g( x4 ?) k! pwith the criteria given below.* O8 ]" @' F& S
8.4.1 A material classified HB shall conform to one of the following criteria:% h, P0 W* m+ Z# R& z
a) it shall not visibly burn with a flame after the ignition source is removed;
8 d- \7 |2 M/ `/ F3 Ab) if the test specimens continue to burn with a flame after removal of the ignition source, the
3 p" d, k2 A( _ {flame front shall not pass the 100 mm mark;
4 }2 q) `; v; s2 D% a" {: ec) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding' Y8 m. o9 r6 K F' c
40 mm/min for a thickness of 3,0 mm to 13,0 mm or a burning rate not exceeding
& T' D* a& S$ \* d& q* e75 mm/min for a thickness of less than 3,0 mm;
1 e/ H J) H! ed) if the linear burning rate does not exceed 40 mm/min for tests with 3,0 mm ± 0,2 mm
: p& C5 `' J, S& ?thickness, it shall automatically be accepted down to a 1,5 mm minimum thickness.* W# b6 Q6 r9 s% {8 T
8.4.2 A material classified HB40 shall present one of the following criteria:) K% i& P4 V7 @4 n8 _& C; v U
a) it shall not visibly burn with a flame after the ignition source is removed;
) D; k; s6 d Ob) if the test specimens continue to burn with a flame after removal of the ignition source, it3 ?% S& Q. z; W: @1 t
shall not have the flame front pass the 100 mm mark;2 ?* h! w* @9 K G$ k( l$ ^5 ?
c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding
! G. T2 k* D: |/ B40 mm/min.
- B6 a) C+ Q: k( s# o8.4.3 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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