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标题: 请教 [打印本页]
作者: sany.wang    时间: 2007-11-26 20:51
标题: 请教
各们,我昨天发的贴怎么找不到了?再重复昨天的问题:在IEC60335-1内cl.30.2.1提到材料防火等级HB40是如何一回事，是否HB等级材料与94V-0，94V-2一样有防火等级高低之分；若有，如何区分？我只知有HB......嘿
作者: helen_lyz    时间: 2007-11-27 11:15
是有等级之分的,一般按美规,V-0是最好的,家电中用到的一些胶料,如果有UL证书,这些燃烧等级的信息在证书上可以找到
作者: kevin1946    时间: 2007-11-27 11:46
引用第0楼sany.wang于2007-11-26 20:51发表的 请教 :
, r, F" c. S+ f8 i( ~$ o$ N各们,我昨天发的贴怎么找不到了?再重复昨天的问题:在IEC60335-1内cl.30.2.1提到材料防火等级HB40是如何一回事，是否HB等级材料与94V-0，94V-2一样有防火等级高低之分；若有，如何区分？我只知有HB......嘿
" V5 Q  s, U6 F/ Q, V8 ~" z! Q% S
阻燃等级：5VA、5VB、V0、V1、V2、HB75、HB40 阻燃性能越来越差！2 R6 A. b% C2 Z% x
* F7 U1 h! v) V& E& G
V0与5v的测试方法不同，可能有些材料同时满足5V 和V0
作者: sany.wang    时间: 2007-11-27 20:22
我想请问HB材料有等级之分吗?
作者: WGQ1981    时间: 2007-11-28 19:06
我也是第一次看到 HB75, HB40.
作者: sany.wang    时间: 2007-11-28 20:20
是呀,这是怎么回事,哪位知道?
作者: 带头大哥    时间: 2007-11-30 15:33
The materials shall be classified HB, HB40 or HB75 (HB = horizontal burning) in accordance
5 X. G/ t3 ?/ g! {3 y/ |with the criteria given below.
& i: Q1 s0 o7 y* e8.4.1 A material classified HB shall conform to one of the following criteria:
, V7 |' i. q  ^( `a) it shall not visibly burn with a flame after the ignition source is removed;2 z6 q! g0 Z! ~- J' F, E8 l
b) if the test specimens continue to burn with a flame after removal of the ignition source, the
4 Y( ]& u# f; w& m: x: L' Oflame front shall not pass the 100 mm mark;  j( A0 }7 R( z# p$ \7 e6 K
c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding7 p+ w8 [- `" W7 I: h( h
40 mm/min for a thickness of 3,0 mm to 13,0 mm or a burning rate not exceeding
! Q, P' g6 ^8 m  e75 mm/min for a thickness of less than 3,0 mm;  _' y# d% s& F: q1 C
d) if the linear burning rate does not exceed 40 mm/min for tests with 3,0 mm ± 0,2 mm" E, Z, l# i8 v  \/ [
thickness, it shall automatically be accepted down to a 1,5 mm minimum thickness.
8 [8 z7 q8 t7 F% k+ c8.4.2 A material classified HB40 shall present one of the following criteria:
5 W3 `! u0 A3 C; y/ L: ha) it shall not visibly burn with a flame after the ignition source is removed;
& j8 E8 Y- b! M% ?& @; m0 U( x" eb) if the test specimens continue to burn with a flame after removal of the ignition source, it
; Y) ^: V' n( o& K% R; nshall not have the flame front pass the 100 mm mark;$ t% n: w+ O1 T+ L0 C. w
c) if the flame front passes the 100 mm mark, it shall not have a linear burning rate exceeding7 @. J6 D( W' L: g  y
40 mm/min.
9 n1 f# F6 e5 n3 `8.4.3 A material classified HB75 shall not have a linear burning rate exceeding 75 mm/min, if
/ w& r/ {9 t; G  e) T- Qthe flame front passes the 100 mm mark.
) J% q: d0 @, w  u+ w4 j楼上的，看完上面的英文，你就知道了。



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