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发表于 2011-11-17 18:53
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引用第9楼03411007于2011-11-17 14:59发表的 :+ A. t) E, i3 e
ASTM F963-2008 CL4.12
4 j5 t9 ^ J. b' [! @% q继续探讨：
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: l" ~6 z# L6 e# }* F# e$ a0 mASTM 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" q# f: N4 V6 a6 s4 c: e
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ISO8124.1 - 2009 MOD 描述得比较详细：! S" k; Q+ W; ^& g
Flexible plastic film or flexible plastic bags without backing and with a minor dimension of > 100 mm and used
' ?5 g9 r; q) s) }0 G% C$ jin toys shall either7 @9 Q) z* N. L3 r a! [- Q" w' m
a) have an average thickness of W 0,038 mm and individual thickness of W 0,032 mm when tested in
" i, y5 z# R6 n- Taccordance with 5.10 (determination of thickness of plastic film and sheeting), or
_' q! J) q. kb) have perforations with well-defined holes (where material has been removed) of 1 % minimum area on" A) {5 e+ c# n$ _
any maximum area of dimensions 30 mm × 30 mm. See Figure 9.& L$ \! {+ |; X/ N8 m" K# Z
NOTE The requirement in 4.10 b) can be fulfilled by having 3,4 mm diameter holes in a square grid pattern where the
- m, `* p& n1 ?5 h/ mvertical 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
% c" K* I$ K; T: o) ^than 9 mm2 which is more than 1 % of 900 mm2 (30 mm × 30 mm).
& `" x) ~! U# v- y; G+ dFor plastic balloons, the thickness requirement in a) applies to double layers of plastic sheeting (i.e. the3 z: s- L3 @7 y* W8 w: p
thickness is measured without inflating or destroying the balloon).& I; ]' W( e l
% D5 k% E& _. `5 c) ?
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