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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
4 {% @ p! k0 e8.4 Classification
4 _6 ?, L# {! N2 U( KThe materials shall be classified HB, HB40 or HB75 (HB = horizontal burning) in accordance3 c, b) G( ?. f
with the criteria given below.3 L& c2 t4 r# O$ X! S
8.4.1 A material classified HB shall conform to one of the following criteria:1 |/ k% w- i$ _1 f. \; F4 t) x) m
a) it shall not visibly burn with a flame after the ignition source is removed;
- P; w% C. q2 f3 b: r% Ib) if the test specimens continue to burn with a flame after removal of the ignition source, the! W' j. ?5 _4 C* O; t1 z0 m' a; ]
flame front shall not pass the 100 mm mark;
7 V& N% ]/ a+ X$ Kc) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding
2 _7 _+ j& H3 W" U40 mm/min for a thickness of 3,0 mm to 13,0 mm or a burning rate not exceeding
6 J( q2 ^9 _2 v75 mm/min for a thickness of less than 3,0 mm;" G' `! A- m' e7 [ N9 W
d) if the linear burning rate does not exceed 40 mm/min for tests with 3,0 mm ± 0,2 mm( M; B$ P8 O$ h1 H$ P
thickness, it shall automatically be accepted down to a 1,5 mm minimum thickness., E" x) k* y" n( I& O2 P
8.4.2 A material classified HB40 shall present one of the following criteria:
( r3 n! i2 |" k) A$ C- T& v! r6 pa) it shall not visibly burn with a flame after the ignition source is removed;3 w3 J5 ~8 t w8 H8 {' A
b) if the test specimens continue to burn with a flame after removal of the ignition source, it n+ ^9 J7 w0 q/ c" _
shall not have the flame front pass the 100 mm mark;3 W. S3 {. Y3 y t& P6 u
c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding
1 \6 r2 J4 I8 g$ r40 mm/min.
$ o5 i/ g8 R0 r1 d h8.4.3 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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