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
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
. W+ N$ W4 ~! M+ u! f. _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
; E3 e' ?4 }" I( 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
+ ~) n* v! }$ i. o, k- Q8 A Comparison of Test Methods for Specific Optical Density of
5 ?* C. n* d2 y  @6 k8 vSmoke Generated by Wire and Cable and Their Raw Material
' j* Y0 G" I% f2 N6 U, A2 z) r* iLI Ming-zhu，et al
( Shanghai Electric Cable Research Institute，Shanghai 200093，China)
Abstract: There are a large number of low smoke zero halogen wires and cables and their raw materials in our industry．
; o  p. W* B! k; @1 n! yNeed to determine the specific optical density of smoke generated by these products． The density of smoke generated
6 d( j  @7 L3 C8 e% U4 F  Y/ mby a specimen was determined under the specified exposure conditions． Values determined by a test method are
  L- A6 O+ q  C  E1 E" }0 Tnot to be considered inherent fundamental properties of the specimen． Values determined by different test methods are
9 n# ^4 H8 C& d6 unot same． The new edition of standard GB/T 8323—2008 is different with the old edition GB/T 8323—1987． The
% P- c4 a" v$ d/ {! o5 `standard 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