|
|
楼主 |
发表于 2011-11-17 18:53
|
显示全部楼层
引用第9楼03411007于2011-11-17 14:59发表的 :. W. M9 ` n9 L# R
ASTM F963-2008 CL4.12
继续探讨：5 J0 g$ q- B) g" p
3 F K8 g1 i' lASTM F963 CL4.12 只是谈到要求的厚度及说明哪些不适应。没有具体谈到：规定的尺寸里要打多大的孔或多大面积的孔# t* P. s# l3 m: q! Y2 `# {, i
1 l, ~# w! N. L1 m2 q. x) L- t+ QISO8124.1 - 2009 MOD 描述得比较详细：! A1 i/ p; r- [* w0 J! @
Flexible plastic film or flexible plastic bags without backing and with a minor dimension of > 100 mm and used8 D( ~& W [& m0 U- O& X3 k
in toys shall either
" @! E4 i: y3 R: l8 D7 S. X9 {6 Oa) have an average thickness of W 0,038 mm and individual thickness of W 0,032 mm when tested in9 f3 l2 p& X: ^* O
accordance with 5.10 (determination of thickness of plastic film and sheeting), or8 T4 q+ q s i/ O4 M
b) have perforations with well-defined holes (where material has been removed) of 1 % minimum area on
% i3 \/ V# e4 Q* x, H" h3 Sany maximum area of dimensions 30 mm × 30 mm. See Figure 9.9 n u! T P, O
NOTE The requirement in 4.10 b) can be fulfilled by having 3,4 mm diameter holes in a square grid pattern where the
$ {) e) m' n" Y1 X j' Kvertical and horizontal distance between the centre of two holes is 22,9 mm or less (the area of a 3,4 mm hole is larger
0 ^& O* P& z$ r9 b" e6 @) g5 _than 9 mm2 which is more than 1 % of 900 mm2 (30 mm × 30 mm).! U# S1 L+ o2 @6 F5 X5 |4 r) ^7 I
For plastic balloons, the thickness requirement in a) applies to double layers of plastic sheeting (i.e. the
8 O9 l' m. R c- w- ?) V' d3 {* Tthickness is measured without inflating or destroying the balloon).& o9 z! A1 W9 o0 N& \: V8 }
& ?9 D5 J1 l: W) A
谢谢大家！ |
|
/2 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2011-11-17 15:00
显身卡
----------------------