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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$ m, C3 h+ `0 P3 I: f
8.4 Classification r5 s9 ]4 ^- `: }: e
The materials shall be classified HB, HB40 or HB75 (HB = horizontal burning) in accordance4 L+ }) o& H' }7 s. [7 }( d: Y3 a
with the criteria given below./ {& _$ m8 y& j5 S K9 E
8.4.1 A material classified HB shall conform to one of the following criteria:
- U- Z, d7 D9 \. @- fa) it shall not visibly burn with a flame after the ignition source is removed;+ l, S7 I: W: W7 _; ~0 m5 C
b) if the test specimens continue to burn with a flame after removal of the ignition source, the9 o4 t: m# G* m z
flame front shall not pass the 100 mm mark;" B1 ^' G$ i2 P- C& l2 ~
c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding
, L3 ~# C o3 Y40 mm/min for a thickness of 3,0 mm to 13,0 mm or a burning rate not exceeding$ Y# D* b$ B; f' z$ L& m5 n$ M7 h- r% n
75 mm/min for a thickness of less than 3,0 mm;
3 C* _! G; h# b8 u, \d) if the linear burning rate does not exceed 40 mm/min for tests with 3,0 mm ± 0,2 mm
, c3 I) D, v5 R9 F7 o2 N) Vthickness, it shall automatically be accepted down to a 1,5 mm minimum thickness.
* V) ]0 r0 Y% r6 S+ ~! f( d5 c8.4.2 A material classified HB40 shall present one of the following criteria:+ m- C. z, g' ^" \
a) it shall not visibly burn with a flame after the ignition source is removed;; N; F9 t( f! o" p- X% Z# o* O
b) if the test specimens continue to burn with a flame after removal of the ignition source, it$ R1 [8 z& ^( ?" c; w) m) j1 u' z; ?
shall not have the flame front pass the 100 mm mark;. K2 \+ _, H5 ~* _" D8 {
c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding& u% Y. u. v; x3 y3 E8 r# g& b9 s
40 mm/min.
$ P6 r" S! [; f4 a% ]5 e) S3 W& `% X8.4.3 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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