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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! W Y6 }1 Z' S" ` f
8.4 Classification0 F4 M4 x; H8 n: K6 p4 f1 Z2 _& F
The materials shall be classified HB, HB40 or HB75 (HB = horizontal burning) in accordance
. ?. y+ l. @1 H2 Pwith the criteria given below.
# m7 h* G+ u# ?' R7 [2 s8.4.1 A material classified HB shall conform to one of the following criteria:
3 m3 Y. X K8 Oa) it shall not visibly burn with a flame after the ignition source is removed;
% K3 ~0 a. c9 S5 ob) if the test specimens continue to burn with a flame after removal of the ignition source, the
( r& o+ I5 R9 G# v8 ^flame front shall not pass the 100 mm mark;
) g' A3 R0 X2 i6 }0 e, Oc) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding
7 I; W2 A) z) R7 m40 mm/min for a thickness of 3,0 mm to 13,0 mm or a burning rate not exceeding
+ U- _% ~ u# y/ F9 k( T75 mm/min for a thickness of less than 3,0 mm;5 t/ D) v3 E: U& Q0 _ |
d) if the linear burning rate does not exceed 40 mm/min for tests with 3,0 mm ± 0,2 mm
' y( o/ [# `9 [' X, O/ s `thickness, it shall automatically be accepted down to a 1,5 mm minimum thickness.- }6 t% C6 B4 r9 _1 I6 |; k" U. l
8.4.2 A material classified HB40 shall present one of the following criteria:
3 u3 d* ?" L. {& pa) it shall not visibly burn with a flame after the ignition source is removed;1 q! S% \, i9 @. B6 B( w
b) if the test specimens continue to burn with a flame after removal of the ignition source, it# C3 E9 W" v, g' L) q# b9 o1 D
shall not have the flame front pass the 100 mm mark;- Y( c! ~9 V. S8 J3 A% Q+ }" |
c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding
+ B4 q1 f$ w8 F; J7 |8 j+ j; r40 mm/min.. w% ]6 z! i' E6 s5 U
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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