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引用第9楼03411007于2011-11-17 14:59发表的 :
% A5 j4 v4 l: t1 E( O4 r7 [ASTM F963-2008 CL4.12 9 D' a6 J3 M; i* C1 e1 @
继续探讨:- p4 B& x# H9 C& n# v
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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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ISO8124.1 - 2009 MOD 描述得比较详细:
* ~. K4 H7 Y! t% OFlexible plastic film or flexible plastic bags without backing and with a minor dimension of > 100 mm and used
1 I0 y q7 o) S. i- C5 Hin toys shall either3 ~ b' C! f* g# H
a) have an average thickness of W 0,038 mm and individual thickness of W 0,032 mm when tested in/ ]$ h3 r; S1 B7 o" G
accordance with 5.10 (determination of thickness of plastic film and sheeting), or7 }$ q& n5 B9 u
b) have perforations with well-defined holes (where material has been removed) of 1 % minimum area on# S4 _- [$ J- o' D! F' ~7 [
any maximum area of dimensions 30 mm × 30 mm. See Figure 9.
; ^/ g! n, D8 PNOTE The requirement in 4.10 b) can be fulfilled by having 3,4 mm diameter holes in a square grid pattern where the
. ?/ {* k. p" x7 Z: ~ q( rvertical 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
9 o/ Z3 a! ? P* i) q+ x) Othan 9 mm2 which is more than 1 % of 900 mm2 (30 mm × 30 mm).
) K" M- R8 H* s- D7 ]5 w/ vFor plastic balloons, the thickness requirement in a) applies to double layers of plastic sheeting (i.e. the' q& f! Z5 m2 h% |; T9 ^
thickness is measured without inflating or destroying the balloon).
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% \8 |+ O8 I' M谢谢大家! |
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