材料及线缆烟密度测量方法比较

zhaogy2006

摘要: 线缆行业大力发展低烟无卤线缆和材料，此类产品都要求测量烟密度。烟密度值是试样在规定试验条
, g. \& R* J6 m4 G. a件下测得的，不同测量方法得到的试验结果不同，不能认为是试样的固有性能。材料烟密度试验方法标准新
版GB/T 8323—2008 与原GB/T 8323—1987 存在诸多差异，线缆烟密度试验方法标准GB/T 17651—1998
* G- v1 @: k! n$ F* H0 o9 Z( IEC 61034—1997) 和UL 2556—2007( 9． 9 节) 测量方法也有较大差异，文中对这些测量方法进行了比较。
关键词: 烟密度; 测量方法; 材料; 线缆; 比较
Comparison of Test Methods for Specific Optical Density of
4 d4 Q# N+ {3 W& M5 ASmoke Generated by Wire and Cable and Their Raw Material
! ~& \& ]0 n- t5 X0 `$ A& yLI Ming-zhu，et al
& X) p. c1 [/ [% G( Shanghai Electric Cable Research Institute，Shanghai 200093，China)
* x+ Q5 I! Y+ g; [  \& sAbstract: There are a large number of low smoke zero halogen wires and cables and their raw materials in our industry．
Need to determine the specific optical density of smoke generated by these products． The density of smoke generated
9 _1 B9 E/ |- m) i" Nby a specimen was determined under the specified exposure conditions． Values determined by a test method are
* T3 z$ o/ ?: T3 ?6 L; s! v5 A& V% Wnot to be considered inherent fundamental properties of the specimen． Values determined by different test methods are
not same． The new edition of standard GB/T 8323—2008 is different with the old edition GB/T 8323—1987． The
; U/ g+ n0 \2 R" I8 ]2 s( Ustandard GB/T 17651—1998 ( IEC 61034—1997) is different with UL 2556—2007 ( 9． 9) ． The report describes
these differences．
Key words: density of smoke; test methods; material; wire and cable; comparison