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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 :9 F! a5 g6 F8 k& Z
ASTM F963-2008 CL4.12
继续探讨：
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. J4 K* C0 C* N8 O2 Q) gASTM 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* `$ Y- z' K' C$ f! S
! s/ [- I+ o) E, {& fISO8124.1 - 2009 MOD 描述得比较详细：
+ L; A5 q0 l6 RFlexible plastic film or flexible plastic bags without backing and with a minor dimension of > 100 mm and used; j/ H4 N! H4 q
in toys shall either( B# V! e; ]( ^3 V" X7 D/ z6 Q
a) have an average thickness of W 0,038 mm and individual thickness of W 0,032 mm when tested in ~# r. S1 x" Y7 D
accordance with 5.10 (determination of thickness of plastic film and sheeting), or
" L( n. T1 S2 T- mb) have perforations with well-defined holes (where material has been removed) of 1 % minimum area on5 s/ J q* t" h }
any maximum area of dimensions 30 mm × 30 mm. See Figure 9.
F2 Q( J8 M5 b$ LNOTE The requirement in 4.10 b) can be fulfilled by having 3,4 mm diameter holes in a square grid pattern where the" c. G2 ?/ |! h% K+ }6 Q3 d
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; G9 U' @7 ^! d* d
than 9 mm2 which is more than 1 % of 900 mm2 (30 mm × 30 mm).
! h" T( D7 _; V3 u- G! H* YFor plastic balloons, the thickness requirement in a) applies to double layers of plastic sheeting (i.e. the! Y% I& ^9 F. r$ L' T) n5 T
thickness is measured without inflating or destroying the balloon).- h4 l$ S3 |; d- n: a6 L& y
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谢谢大家！ |
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