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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 :/ @0 m3 p# E9 v# F" C- ~8 o5 z( T
ASTM F963-2008 CL4.12
2 b, e/ P7 J* U9 r1 J; [& }继续探讨：
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7 [5 W: c3 L! `! B5 m% XASTM 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% S! Z' W" V8 A8 L3 J
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ISO8124.1 - 2009 MOD 描述得比较详细：
7 ]# {. t! j$ g3 }* NFlexible plastic film or flexible plastic bags without backing and with a minor dimension of > 100 mm and used8 q) n) Z8 x1 ^0 E- x4 \- ?
in toys shall either
0 [0 b. A" p7 z* D. C9 A {) [+ i# Ca) have an average thickness of W 0,038 mm and individual thickness of W 0,032 mm when tested in: P( ]+ D1 @) x, K d
accordance with 5.10 (determination of thickness of plastic film and sheeting), or. q2 P' f* F" k7 j. \6 x% E
b) have perforations with well-defined holes (where material has been removed) of 1 % minimum area on- M; G- \& N0 m* D' e/ Y2 \9 Q2 Y9 x p2 C
any maximum area of dimensions 30 mm × 30 mm. See Figure 9.
" C) c- A; M' fNOTE The requirement in 4.10 b) can be fulfilled by having 3,4 mm diameter holes in a square grid pattern where the6 H$ y" Y: y; K# R9 W$ y, {$ B n
vertical 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
5 p& N }1 l- E$ U! I0 B7 e$ ~) sthan 9 mm2 which is more than 1 % of 900 mm2 (30 mm × 30 mm).
" H" {& k8 ~8 ?0 x2 y" [For plastic balloons, the thickness requirement in a) applies to double layers of plastic sheeting (i.e. the
6 p( a! e% h. \: ~3 }thickness is measured without inflating or destroying the balloon).
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3 N6 _3 H9 ~6 p$ M9 j谢谢大家！ |
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