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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 :
) f& m8 K# Z h. jASTM F963-2008 CL4.12
继续探讨：
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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：) Q# w I' v, N4 Q- X0 P& e3 H. a
Flexible plastic film or flexible plastic bags without backing and with a minor dimension of > 100 mm and used' e( L+ x% U w! i
in toys shall either$ T* g( V$ ~) j5 h1 {5 _0 W3 L
a) have an average thickness of W 0,038 mm and individual thickness of W 0,032 mm when tested in' R3 Z4 Q8 R9 a$ S7 Z
accordance with 5.10 (determination of thickness of plastic film and sheeting), or1 P7 t; n" O1 @
b) have perforations with well-defined holes (where material has been removed) of 1 % minimum area on
' ^- j# @- l! J4 q2 ^any maximum area of dimensions 30 mm × 30 mm. See Figure 9.5 F; r; F. {5 a2 o F
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- q0 r! Q0 ]* cvertical and horizontal distance between the centre of two holes is 22,9 mm or less (the area of a 3,4 mm hole is larger8 q( e6 F+ L5 g* x+ s' U
than 9 mm2 which is more than 1 % of 900 mm2 (30 mm × 30 mm).- u [) V) |. r4 t- H
For plastic balloons, the thickness requirement in a) applies to double layers of plastic sheeting (i.e. the9 F1 y0 S( x2 v1 \
thickness is measured without inflating or destroying the balloon).
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谢谢大家！ |
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