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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 :/ D- B# m9 j+ G7 a, n
ASTM F963-2008 CL4.12
继续探讨：2 T" m9 u" N o) J; l" V, |( \
0 L8 q& H6 t7 K& 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
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ISO8124.1 - 2009 MOD 描述得比较详细：
# ]# e) I- v+ dFlexible plastic film or flexible plastic bags without backing and with a minor dimension of > 100 mm and used
1 j9 |: ^4 U! j- `/ Hin toys shall either
, X, m( C6 m% e, X) V: w' ?9 Z2 i4 na) have an average thickness of W 0,038 mm and individual thickness of W 0,032 mm when tested in6 j" J* B1 h" |+ U
accordance with 5.10 (determination of thickness of plastic film and sheeting), or6 j& I0 y9 T! f; t) Y, o4 g
b) have perforations with well-defined holes (where material has been removed) of 1 % minimum area on
. v1 Q: J. z$ n" a% hany maximum area of dimensions 30 mm × 30 mm. See Figure 9.1 o( ^* o) W( i7 u. [! r
NOTE The requirement in 4.10 b) can be fulfilled by having 3,4 mm diameter holes in a square grid pattern where the& o' X. y8 Z. I. A0 c. t& L4 _
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
6 p$ N: B2 _7 b* Q8 X" F: uthan 9 mm2 which is more than 1 % of 900 mm2 (30 mm × 30 mm).
8 L4 M7 y9 u# m6 [3 BFor plastic balloons, the thickness requirement in a) applies to double layers of plastic sheeting (i.e. the v( C; J/ `8 e( Z: F8 x
thickness is measured without inflating or destroying the balloon).* C7 W1 t" g) w4 i$ h% ~* |
, y7 |/ S6 ?: |% \) n谢谢大家！ |
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