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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 :1 f; E) l* q" v$ I
ASTM F963-2008 CL4.12
继续探讨：/ G3 R v. s, x9 ^5 L7 B% n
* b9 T+ q) d# Z+ c! }ASTM 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
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5 q0 p& S) Q( y8 C# B/ r' xISO8124.1 - 2009 MOD 描述得比较详细：2 p; p6 f3 O! _ `% V5 B. K0 z; ]
Flexible plastic film or flexible plastic bags without backing and with a minor dimension of > 100 mm and used
4 K0 d6 T8 u, _% d5 Q; Z jin toys shall either
. g/ h) T+ L7 @! d7 c/ P) m& u" da) have an average thickness of W 0,038 mm and individual thickness of W 0,032 mm when tested in3 X$ I4 N" g2 P
accordance with 5.10 (determination of thickness of plastic film and sheeting), or
$ n5 t. z3 t, @" qb) have perforations with well-defined holes (where material has been removed) of 1 % minimum area on- ~" H2 R* e2 W& c k
any maximum area of dimensions 30 mm × 30 mm. See Figure 9.' z% Y' R. M R- E+ ?
NOTE The requirement in 4.10 b) can be fulfilled by having 3,4 mm diameter holes in a square grid pattern where the
W% b3 K3 h8 U0 r0 |" \0 e. i$ t+ Bvertical 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
# e" S* `/ m2 c9 m1 ]than 9 mm2 which is more than 1 % of 900 mm2 (30 mm × 30 mm).4 M* ]/ d5 w6 H- ?1 b
For plastic balloons, the thickness requirement in a) applies to double layers of plastic sheeting (i.e. the
8 e6 ?8 q1 W9 C% G2 p+ @1 Uthickness is measured without inflating or destroying the balloon).
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