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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 :+ w4 D1 |2 F5 R* A
ASTM F963-2008 CL4.12
; w9 i0 _3 z0 ?/ g3 W继续探讨：
+ i: K! F0 g6 m7 d1 V4 O9 m# F6 x8 j, I, v7 v2 h0 z% A1 B
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5 B& j+ N. m0 l. h5 K5 s3 r
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ISO8124.1 - 2009 MOD 描述得比较详细：
; T i- g, H' k1 B1 e" zFlexible plastic film or flexible plastic bags without backing and with a minor dimension of > 100 mm and used6 _2 w7 ?2 ?! \( S4 ]
in toys shall either
. h3 B. h' A+ n. @" w" ga) have an average thickness of W 0,038 mm and individual thickness of W 0,032 mm when tested in& b8 R5 T' F' E- }7 \% V) m
accordance with 5.10 (determination of thickness of plastic film and sheeting), or
* H# P4 ?/ t* d. Ub) have perforations with well-defined holes (where material has been removed) of 1 % minimum area on
7 A: T3 o- f C( v3 y2 K/ x Pany maximum area of dimensions 30 mm × 30 mm. See Figure 9.' { }) i" Y& W& {+ d& N1 c8 e# T& B
NOTE The requirement in 4.10 b) can be fulfilled by having 3,4 mm diameter holes in a square grid pattern where the
7 p& h! o$ @% c! a$ r5 C0 ]! evertical 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
% q0 h4 m. }) N( p& j7 Athan 9 mm2 which is more than 1 % of 900 mm2 (30 mm × 30 mm).
' n! S7 u+ b/ H- iFor plastic balloons, the thickness requirement in a) applies to double layers of plastic sheeting (i.e. the
, K# \2 [- S2 A5 hthickness is measured without inflating or destroying the balloon)." s7 o# H- r3 [3 u' W9 ?+ i7 @% y f
- o$ U; h- V C- g. d$ s谢谢大家！ |
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