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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 :( O# V2 _% L* y! i& M: |
ASTM F963-2008 CL4.12
继续探讨：
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/ K6 U L# o1 `9 v1 j/ \; HASTM 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：
4 y1 W* y' ]2 Q: r: r# }Flexible plastic film or flexible plastic bags without backing and with a minor dimension of > 100 mm and used
- j5 _5 r }# B7 g* u, Gin toys shall either0 d4 }% K7 X% `9 L, `
a) have an average thickness of W 0,038 mm and individual thickness of W 0,032 mm when tested in2 `/ J5 e2 Q @9 Y& w, p
accordance with 5.10 (determination of thickness of plastic film and sheeting), or& S* v( ~' Q' G# h$ j$ i/ `
b) have perforations with well-defined holes (where material has been removed) of 1 % minimum area on
3 i) ?8 z2 P2 E/ e& F/ Oany maximum area of dimensions 30 mm × 30 mm. See Figure 9.
' F# u" S3 T* q$ t" r0 C, sNOTE The requirement in 4.10 b) can be fulfilled by having 3,4 mm diameter holes in a square grid pattern where the
& S* A- ^/ `6 Z. T6 ?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 larger6 V/ ]5 R3 {, S7 u, d
than 9 mm2 which is more than 1 % of 900 mm2 (30 mm × 30 mm).
9 z* b- [3 W$ V' |) t) sFor plastic balloons, the thickness requirement in a) applies to double layers of plastic sheeting (i.e. the( @ j9 H2 c8 O8 }4 Z! o6 P; I
thickness is measured without inflating or destroying the balloon). f1 N" ?, A2 U3 z- ?$ c7 k
% Y3 x0 s* A& h/ m ]* Y- b9 F$ o
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