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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 :0 U" [* t R& a
ASTM F963-2008 CL4.12
& G4 Y% i" [; H8 c! P H继续探讨：% R: m% T9 z* b
+ {3 V. m8 D" {. a- s3 lASTM 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 K4 N. I- B6 w* p3 \& gISO8124.1 - 2009 MOD 描述得比较详细：( b0 T J, F0 z1 D& r6 O; J% U
Flexible plastic film or flexible plastic bags without backing and with a minor dimension of > 100 mm and used. K6 K- z& }9 T) R- c& H6 }
in toys shall either
$ B0 |6 z! }* J4 v9 M- }a) have an average thickness of W 0,038 mm and individual thickness of W 0,032 mm when tested in- x" N D- z% N: j& [* w
accordance with 5.10 (determination of thickness of plastic film and sheeting), or- b$ X8 q4 K7 U% g0 N
b) have perforations with well-defined holes (where material has been removed) of 1 % minimum area on* N8 E7 ]* E0 f" I
any maximum area of dimensions 30 mm × 30 mm. See Figure 9.0 I6 C9 l2 _8 A
NOTE The requirement in 4.10 b) can be fulfilled by having 3,4 mm diameter holes in a square grid pattern where the- m# k0 o; X& o4 ~; @% d$ U C$ ?' u
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- F6 f* m- b, }5 Z+ Q+ W, c2 |
than 9 mm2 which is more than 1 % of 900 mm2 (30 mm × 30 mm).' i' [) g) }. `0 e9 v
For plastic balloons, the thickness requirement in a) applies to double layers of plastic sheeting (i.e. the5 s+ R, b( f; }
thickness is measured without inflating or destroying the balloon)., V4 o6 G! z4 I4 A$ r, X1 I
$ X- H) G8 Z9 v6 c$ m3 F
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