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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3 t( G+ y6 y9 y X) M
8.4 Classification; A2 @2 K6 t/ e& c
The materials shall be classified HB, HB40 or HB75 (HB = horizontal burning) in accordance" ~. t- Z! T# x, d* A& K
with the criteria given below.% U. n: w! e g2 |
8.4.1 A material classified HB shall conform to one of the following criteria:
- r/ m' x6 d" a; V* J: d' {/ t9 Ba) it shall not visibly burn with a flame after the ignition source is removed;# ]; ]- I" b9 Q, [) Q
b) if the test specimens continue to burn with a flame after removal of the ignition source, the
! [) |/ q! S4 s Zflame front shall not pass the 100 mm mark;
, G- E; b6 ~; a2 n8 Z9 Xc) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding
. r6 ~8 j- I9 j! K( V6 d, f" m3 ~4 X [40 mm/min for a thickness of 3,0 mm to 13,0 mm or a burning rate not exceeding
3 r& i6 V8 x3 V75 mm/min for a thickness of less than 3,0 mm;
1 x5 i* U( |+ P" hd) if the linear burning rate does not exceed 40 mm/min for tests with 3,0 mm ± 0,2 mm( z; X1 |1 F9 d. z
thickness, it shall automatically be accepted down to a 1,5 mm minimum thickness.
! F' n. S0 s m) s1 W2 R8.4.2 A material classified HB40 shall present one of the following criteria:+ d& |. v0 j" q9 U* i' v
a) it shall not visibly burn with a flame after the ignition source is removed;) a& _2 j" {( U7 k- j( i
b) if the test specimens continue to burn with a flame after removal of the ignition source, it" {! z) Y9 y4 X
shall not have the flame front pass the 100 mm mark;
2 j& q' h: I" S0 Bc) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding
2 |4 C1 L: H% O' J2 m+ e40 mm/min.1 |' J, c2 f( o* j
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
:):)