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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 :
* H3 O, ~( y1 m4 |' B, l6 Y6 p# NASTM F963-2008 CL4.12
继续探讨：. @! |. c, y/ j* R. h( A" I% ^
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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 k% n% A3 Q5 d( ^ISO8124.1 - 2009 MOD 描述得比较详细：
5 f8 E9 W$ J5 Y- QFlexible plastic film or flexible plastic bags without backing and with a minor dimension of > 100 mm and used
* S( e1 R0 N. a/ qin toys shall either6 v; W. w7 E4 U
a) have an average thickness of W 0,038 mm and individual thickness of W 0,032 mm when tested in
" N% A$ c# |& P" Zaccordance with 5.10 (determination of thickness of plastic film and sheeting), or
7 u! S' [* M, y+ V) r6 ? fb) have perforations with well-defined holes (where material has been removed) of 1 % minimum area on$ i e; W) G% e$ ]3 y! J: B; ^
any maximum area of dimensions 30 mm × 30 mm. See Figure 9.
5 E2 r, D, {- ?' s; mNOTE The requirement in 4.10 b) can be fulfilled by having 3,4 mm diameter holes in a square grid pattern where the/ V3 h2 h) e: r1 r
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+ ?) d! L2 Q3 W3 {7 E# v
than 9 mm2 which is more than 1 % of 900 mm2 (30 mm × 30 mm).0 j d. ?) z! Q& y0 p4 }" H
For plastic balloons, the thickness requirement in a) applies to double layers of plastic sheeting (i.e. the$ t# \' f" d- @/ l, S; E
thickness is measured without inflating or destroying the balloon).2 W" T* t! A" W6 b" @
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