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[玩具标准] ISO8124

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楼主
发表于 2012-11-3 09:11 | 只看该作者 回帖奖励 |倒序浏览 |阅读模式
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本帖最后由 哥哥在家 于 2012-11-3 09:29 编辑
! e. U( E8 z4 R8 ^1 n
8 g# S/ |' V6 K7 @8 D' HISO 8124-1 AMD-2 2011 Draft
& J3 ~2 u- F& H5 ]" ^ISO 8124-1 AMD-1 2011 Draft0 }9 Z2 W2 m/ j* w: z
1 {* h. E' p5 X1 `% C! [6 Z) h

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沙发
发表于 2012-11-4 18:52 | 只看该作者
期待正式版! ISO 8124-1:2012
  f: `+ O5 n0 u9 K# ]http://www.iso.org/iso/home/stor ... .htm?csnumber=62327
板凳
发表于 2012-11-8 16:47 | 只看该作者
更新哪些内容呀?
地板
 楼主| 发表于 2012-11-12 08:51 | 只看该作者
Contents Page
) {2 c- q) N" M+ u3 Terms and definitions ...........................................................................................................................3% q% x8 w4 T  l$ c0 @; l
4 Requirements........................................................................................................................................3
& u% c0 B) }% l1 ^4.30 Magnets and magnetic components....................................................................................................3
! S/ P; e; j' G- l4.30.1 Magnetic/electrical experimental sets intended for children over 8 years......................................3
) |0 q0 N" {+ J5 \2 k& v4.30.2 Toys other than magnetic/electrical experimental sets intended for children over 8 years..........4
1 [' R4 J3 W' x( H# t$ G5 Test methods.........................................................................................................................................43 P2 ~- F% G5 y5 @6 Z7 _
5.31 Tension test for magnets......................................................................................................................5
9 X5 z+ X" ]4 d: l- H5.31.2 Toys with magnet(s) or magnetic component(s)..................................................................................5
5 h9 h; d) l' x' B7 H8 ^5.31.3 Toys that contain one magnet only and a mating metal component...............................................5
( i6 {9 M9 I: s+ I5.31.4 Toys that contain one magnet only and no mating metal component.............................................5
; ]4 b$ u1 x7 R2 i5.32 Magnetic flux index...............................................................................................................................68 c' G5 a5 `0 X5 u# I
5.32.1 Principle.................................................................................................................................................60 w9 l. @* b- L' Y
5.32.2 Apparatus ..............................................................................................................................................6
& q  `, U' s# c5.32.3 Procedure ..............................................................................................................................................6; h! u/ U+ r0 M0 s: Y' j5 l
5.32.4 Calculation of magnetic flux index ......................................................................................................7
1 ?# \% I3 I0 G9 c  Z4 V* ^5.33 Cycling ...................................................................................................................................................7
% l& C" t$ J: |9 f' ~% j; J5.34 Impact test for magnets ........................................................................................................................7
7 N6 U/ \1 d) v4 u: U5.35 Soaking test for magnets......................................................................................................................71 ]; [6 r( ^& i6 T. P
B.2.21 Magnetic/electrical experimental sets for children over 8 years ......................................................8
6 h  T% r) ^) F) ]  {& ?E.44 Magnets .................................................................................................................................................8

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5#
 楼主| 发表于 2012-11-12 08:52 | 只看该作者
3 Terms and definitions' l) n, ?8 J$ f/ D
Add the following definitions:' W2 F# y3 g& s# G( k$ S: |
3.xx0 o  o6 h" }9 Y
magnetic component  J* V# ]$ k0 w7 W; |9 B2 G
any part of a toy which contains an attached or fully or partially enclosed magnet' Q# ~) x- h6 a2 S
3.yy
9 B( e; p3 I8 Y3 }0 Umagnetic/electrical experimental set7 `/ [  J6 b% d* \, f
toy containing one or more magnets intended for carrying out educational experiments involving both, N; T- }4 P; ?& F% j$ s" C
magnetism and electricity
/ \! ]3 m0 |8 l; d; e3.zz4 P! w* w* Y1 y  c4 t
functional magnet in electrical or electronic components of toys
2 x; I% v9 G# f5 I7 t2 {0 Pany magnet necessary for the function of motors, relays, speakers and other electrical or electronic: p  f/ V7 x! D5 L. i  R
components in a toy where the magnetic properties are not part of the play pattern of the toy
& k7 j) T9 f' d2 i4 Requirements  {) ~0 ^9 r5 A% F/ j/ j
Add the following requirements:3 l, c* E: y+ b( o8 E0 c2 m$ o
4.30 Magnets and magnetic components% i% x# c! A. @' B. W5 R, A1 n
See Clause E.44.
1 e, Q8 ?2 ]) `) I1 G! o3 N* p5 R( q, ]- E4.30.1 Magnetic/electrical experimental sets intended for children over 8 years
& O( T7 a/ e6 eMagnetic/electrical experimental sets intended for children 8 years and over that contain magnetic
0 @) ]; k: l6 L4 J5 T$ A8 G! ncomponents shall carry a warning (see B.2.21 for guidance) if they both:) ^; q9 K2 Z% O5 s& O! x
- have a magnetic flux index greater than 50kG2mm2 (0,5 T2mm2) when tested according to 5.32 (magnetic- v* U! H. B5 C" b6 M) U& U  q+ T
flux index)
0 d. X0 ^9 F0 d& c1 e# {- fit entirely in the cylinder when tested according to clause 5.2 (small parts test)
% z4 H4 J0 Q1 r' U+ _NOTE Magnetic/electrical experimental sets intended for children under 8 years shall comply with the requirements in. Z! \: h# J% l2 M
4.30.2 (toys other than magnetic/electrical experimental sets).* d" s1 Y) q7 R* a0 E! s, o' T
These requirements do not apply to functional magnets in electrical or electronic components of toys.
6#
 楼主| 发表于 2012-11-12 08:53 | 只看该作者
4.30.2 Toys other than magnetic/electrical experimental sets intended for children over 8 years
7 w* `% o' X- |4 Na) Any loose as received magnet(s) and magnetic component(s) shall either have a magnetic flux index less, \' a+ j7 U! V; P% @
than 50 kG2mm2 (0,5 T2mm2) when tested in accordance with 5.32 (magnetic flux index), or shall not fit+ o" `2 E2 l- D
entirely in the cylinder when tested in accordance with 5.2 (small parts test).
8 t9 ?  a; u4 m. p) w0 |b) Wooden toys, toys intended to be used in water and mouth pieces of mouth-actuated toys with magnets; |; w$ @, H1 P) Z
or magnetic components shall be tested in in accordance with 5.35 (soaking test for magnets) before
; N, }/ J- L- }& r3 Z: g- }1 v: `being tested in accordance with 4.30.2 c) below.6 |, L0 o8 \& R  }" B1 l
c) The following tests shall be carried out in the prescribed order on all unique magnetic component(s). The$ O/ D& A' |1 }) }1 }1 l
components used for this testing shall not have been previously subjected to normal use and reasonably# U" s4 L0 G# n  N4 k: f. v
foreseeable abuse tests. Any magnet(s) and magnetic component(s) that become liberated from a toy, or
( f, M3 m) y8 V1 f( u/ ~$ Hfrom a loose as received magnetic component shall either – when tested according to the tests listed
! O! _' u4 v" A1 V, y, ^/ v5 Ubelow - have a magnetic flux index less than 50 kG2mm2 (0,5 T2mm2) when tested in accordance with
$ o8 n7 r7 k) W; s* g3 ]: ]# p1 q5.32 (magnetic flux index), or shall not fit entirely in the cylinder when tested according to 5.2 (small parts4 H- ?' i$ [2 w; Q' S5 U" \
test).( }8 H1 L, g5 S3 Q
⎯ 5.33 (cycling); g3 v6 D# J$ R5 Z0 B3 p
⎯ 5.24.2 (drop test) or if applicable, 5.24.3 (tip over test for large and bulky toys)8 B# O) A% ]! |  M
⎯ 5.24.5 (torque test)  A7 p  f1 @$ k1 |
⎯ 5.24.6.1 (tension test, general procedure)
1 ]/ L8 e. b8 D/ T. l" _⎯ 5.24.6.2 (tension test for seams in soft-filled (stuffed) toys and beanbag-type toys), if applicable
1 U0 u% c# Z" u$ ]' j3 t% V7 e⎯ 5.34 (impact test for magnets)
/ q1 ~) j5 O  F5 Q3 c% w; ^# r⎯ 5.24.7 (compression test), for magnets that are accessible but cannot be grasped (as specified in) C  y& Y5 ~9 o0 ~; l
5.24.6.1 (general procedure)
0 {  ^* B  y! \- V! m; S, f⎯ 5.31 (tension test for magnets))
  x( X3 o( x5 q/ PNOTES: U# l+ a8 s4 S- {* k
1 Examples of unique magnetic components are rods of different sizes or shapes containing magnets.
' ?7 r" m7 O) J  V2 If the toy contains one magnet, the component holding the magnet is considered to be a unique component.8 [& r5 b" n  G5 `5 Q( T
3 An example of a magnet that is accessible but cannot be grasped is a magnet that is recessed.
( t# P5 q4 n& O2 f6 \- QThese requirements do not apply to functional magnets in electrical or electronic components of toys5 ]) ]( p3 ~0 f. Y
5 Test methods
0 ?& m$ {# r6 Y5 r4 n. B( YReplace the second paragraph of clause 5.14 (impact test for toys that cover the face) with the following:8 U1 m; |' R7 s
Drop a steel ball of diameter (16 ± 0,15) mm and mass of (16,9 ± 0,7) g from a height of (130 ± 0,5) cm onto$ F& r. r2 R$ m% F. ?1 Q
the horizontal upper surface of the toy in the area that would cover the eyes in normal use.
' n' F! C5 o' I8 |) ~Add the following new note to clause 5.24.1 (reasonably foreseeable abuse tests, general)* V: m0 A, \* ^
NOTE: The tests according to clause 4.30.2 are carried out in the order specified in the clause, on a toy or8 e: U6 G. i1 J% Y: Q
part of a toy that has not been previously tested according to this clause.+ v, K. R" V! m" K8 l
Add the following test methods:
5 O4 U4 Y1 p, A& m" W9 f6 v--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`---
7#
 楼主| 发表于 2012-11-12 08:53 | 只看该作者
5.31 Tension test for magnets
: G0 ~+ b! s- X( XSee 4.30.2 c).
8 r. M5 ]) f. u- j0 B9 X5.31.1 Principle
. P' N$ i. R5 _6 m2 _. t1 z; O5 u! a1 qThese tests simulate the intended or reasonably foreseeable play pattern. It is recognized that toys may
2 |3 B: C7 G& I. Q5 U. m; Icontain a single magnet or a combination of magnets, magnetic components and/or metal mating parts and
! d+ G. t0 W# qthe tests are designed to simulate a reasonably foreseeable play pattern using these components to attach
& t/ ]" `) x. @- q# h% P+ v* Vand detach the magnetic parts.5 ?8 q5 H' {) `4 H6 T) }" }
For toys that contain more than one magnet/ magnetic component, the test specified in 5.31.2 (toys with
  ]! k4 h+ D3 O7 Wmagnet(s) or magnetic component(s)) shall be carried out unless it is not possible to perform the test without
4 \7 [/ j7 L+ X4 P* i8 @damaging the toy. In the latter case, the test shall be carried out using the reference disk, as described in4 @0 V$ {: [7 U# @; S6 e/ V
5.31.4 (toys that contain one magnet only and no mating metal component).
9 s8 W' ]0 g1 HNOTE: An example of a case where it is not possible to perform the test in 5.31.2 with magnet(s) or magnetic
  E' N" M7 U1 m2 U, Y$ q- Icomponent(s) without damaging the toy, is a toy figurine with one accessible but non-graspable magnet in each foot.
! S$ T+ i8 v- HToys that contain one magnet only and a mating metal component shall be tested according to 5.31.3 (toys
/ q' R: l& I2 _% j/ c7 q+ ?! vthat contain one magnet only and a mating metal part).
  S6 D9 ?( f# k1 {Toys that contain one magnet only and no mating metal component, shall be tested according to 5.31.4 (toys9 a3 v: a9 w. o& z
that contain one magnet only and no mating metal component), since this simulates a play pattern where the1 B, }6 l8 [5 O2 ?3 U+ @' O
toy is attached and detached to a surface that is not delivered with the toy.
- X- ^) E- D! e) [' w+ Q5.31.2 Toys with magnet(s) or magnetic component(s)
1 L. m. Q, C0 w& w7 d( `$ dIdentify the magnet or magnetic component in the toy that is most likely to be able to detach. The identified
  ?; o) K9 d* q# X. Y* l' tmagnet or magnetic component shall be subjected to the tension test for magnets.5 l- N5 P. P# a9 D* s) K
If it is not possible to determine which magnet or magnetic component(s) in the toy is most likely to be able to7 L9 U) E. l8 R; G: R: G. j
detach the magnet under test, it is permissible to repeat the test with another magnet or magnetic component) o6 Y( X1 u4 A/ Y( r" U* V0 E
from the toy.5 O6 C- R- \5 O* v# ]& ^2 v
Without damaging the toy, place the magnet or magnetic component in the orientation of attraction, as close7 f4 {$ ^5 E  H4 B  W9 Z
as possible, making contact if possible, to the magnet to be tested. Gradually apply a pulling force to the
& S( G8 b( _, ]magnet/magnetic component until it separates from the magnet under test. Perform the test 10 times or until
% y5 L% a" A8 Fthe magnet under test is detached from the toy, whichever occurs first., H! I, D1 c8 F; x- s, @! `6 O( l
Repeat the procedure for any other magnet that in accordance with 4.31.2 (toys other than magnetic/electrical. ~6 C4 N( J: R9 B! o( p
experimental sets intended for children over 8 years) shall be subjected to the tension test for magnets.; T3 A+ q: j$ j1 i3 z& E2 U
5.31.3 Toys that contain one magnet only and a mating metal component: B: m) Q8 W( z3 I0 `) g: J
Without damaging the toy, place the metal components as close as possible, making contact if possible, to the
) w  g6 }/ X% L9 A- a5 xmagnet to be tested. Gradually apply a pulling force to the metal component until it separates from the
1 k' g5 d1 L$ w6 b% amagnet under test. Perform the test 10 times or until the magnet under test is detached from the toy,
( j) t" e0 ]2 n& I( s' d: O+ ~whichever occurs first.
: y+ s" s% j3 Z5.31.4 Toys that contain one magnet only and no mating metal component: Z3 X  u4 _% w! Q5 }
5.31.4.1 Apparatus: j6 R! U8 o8 c7 H+ m3 y( b) c
Nickel disc with a minimum nickel content of 99 %, and having the following dimensions:# n6 Q0 B5 h( R" ~3 T* L, y) C' u2 M
- diameter: (30 ± 0.5) mm
: v4 v" j/ L/ O" C- n# V- thickness: (10 ± 0.5) mm
8#
 楼主| 发表于 2012-11-12 08:53 | 只看该作者
5.31.4.2 Procedure6 Q2 H8 L+ _; l8 A
Without damaging the toy, place the flat part of the disc as close as possible, making contact if possible, to the
! {5 q) N8 P% w, [8 i+ H+ ^magnet to be tested. Gradually apply a pulling force to the disc until it separates from the magnet under test.
$ W& P$ t1 p: f* T* h1 z% qPerform the test 10 times or until the magnet under test is detached from the toy, whichever occurs first.
# `( w% |- v0 r6 u% F! S: ]+ Z5.32 Magnetic flux index+ G* s1 H- S9 F# \
See 4.30.1, 4.31.2 a) and c).$ b5 A/ N6 U% t; y
5.32.1 Principle* F9 K3 w2 D" W; P6 K
The magnetic flux index is calculated based on the results from measurements of the flux density and the pole/ s" W1 s" O6 W6 a; R
surface area.5 x/ ~" u) @) v/ a& a+ W9 j
5.32.2 Apparatus! z+ |) p; A# c  S1 p" f
5.32.2.1 Direct current field Gauss meter, capable of determining the field to an accuracy of 5 G.+ W6 s  U1 k: E3 O8 l, n
The meter shall have an axial type probe with
5 o2 ?) Y1 _$ B- }' d- an active area diameter of (0,76 ± 0,13) mm* a( M# G8 E& g9 m1 d! R# }. q0 K
- a distance between the active area and probe tip of (0,38 ± 0,13) mm2 v9 H  W, U3 b0 T9 S0 {
5.32.2.2 Calliper, or similar device with an accuracy of 0,1 mm.
0 ~* f& \/ S6 N, Y$ p5 Y3 \4 V5.32.3 Procedure
/ }, g$ h$ b! l) J+ j7 K5.32.3.1 Measurement of flux density8 d1 G% ~0 h+ W8 R2 M
Identify the surface of the magnet that is the pole.8 F: d  _+ d) a: N
Place the tip of the Gauss meter probe in contact with the pole surface of the magnet. For a magnetic
3 k, `# \6 |8 R2 D' x! A4 ~1 V7 Hcomponent (where the magnet is fully or partially imbedded in part of the toy), place the tip of the probe in8 |/ _  y1 S. @( G
contact with the surface of the component.& H5 j* s9 B% ~  {* \
Maintain the probe in a position perpendicular to the surface.4 O$ l" b' W# P
Move the probe across the surface to locate the maximum absolute value of the flux density. Record the8 I  k' ^) x; |/ p5 `8 i& z( V
maximum absolute value of the flux density.
- c0 G9 Y: C* ^4 n* k/ DNOTE Since the meter can read both negative and positive values, the absolute value is used for calculations.! U7 H, A! ^; \& c  X
5.32.3.2 Measurement and calculation of the pole surface area' d5 H+ K6 J# C8 U3 f
If the magnet is imbedded/attached as part of a magnetic component, extract the magnet from the component,
0 |8 a7 `2 K1 V% @1 O- o- keven if it is necessary to break the toy.. y" j) `* R4 F& t
If the pole surface of the magnet is flat, measure the dimensions with an accuracy of ± 0,1 mm and calculate% D2 Q6 Z5 e1 V/ Z8 k
the area using the appropriate geometric formula.
- f8 K/ E" x/ u; G# I& S; \If the pole is not flat, (for example hemispherical) measure the maximum diameter of the magnet+ X0 N* X( W9 A, f% a
perpendicular to an axis through the magnetic poles (see Figure XX), with an accuracy of ± 0,1 mm and
! A7 l5 S6 C5 p3 c6 y- j$ Ecalculate the area of the corresponding cross section. For multi-pole magnets, measure and calculate the1 }4 ^/ Y3 v' W' H# ~7 Z
area of the largest single pole, which can be identified using magnetic field viewing film or equivalent.
9#
 楼主| 发表于 2012-11-12 08:54 | 只看该作者
NOTE An example of a multi-pole magnet is a rubberized/plastoferrite magnet, consisting of multiple strips or poles.
2 }0 O- ^4 y2 ^9 ~Figure XX – Maximum diameter of magnet with a non-flat pole+ g* e' y% \) s2 c
Key! @# M8 w/ {( ~7 s4 F
1 maximum cross-section perpendicular to the axis( ^: u' A2 v+ F
2 axis through the magnet poles
! L4 p& l/ {. {9 r5.32.4 Calculation of magnetic flux index7 \- T3 ?8 ]& J7 L- V. |2 Q  j+ u
The flux index (kG2mm2) is calculated by multiplying the calculated area of the pole surface (mm2) of the
  b% l1 Q. D7 w$ t! S& }% Fmagnet by the square of the maximum flux density (kG2).
& s2 r7 U% x. s+ ?5.33 Cycling* x5 M6 H, j* ~% _4 H
See 4.32.2 c).
( i: b" Z0 x7 A: E0 z) {+ ~Ten cycles as described below, shall be performed on the as-received magnet(s) or magnetic component(s).9 M" U: Q! z0 b: F; d; b" o
The magnet or magnetic component shall be brought together to a distance that initiates magnetic attraction,
1 f- I0 n; e3 u" gbe released, and then pulled apart to the distance where magnetic attraction ceases. Each attachment and
- r# @6 O3 X; pdetachment shall count as one cycle. If no other magnets or magnetic components are provided with the toy,2 b& B5 ^! H) ]
the mating metal part or surface, according to the toy’s intended play pattern, shall be used for cycling# y  E: S$ N8 I
purposes. If no other metal parts or surfaces are provided with the toy, the apparatus described in 5.31.4 shall
' H, B( R0 f/ z  M; Xbe used for cycling purposes.( x* \9 C( U$ R- M) M: _' j
5.34 Impact test for magnets
9 m% [/ T' i" o& dSee 4.32.2 c).
; R' m4 ~5 d! b$ Y- E, zPlace the relevant component of the toy in the most onerous position on a plane horizontal steel surface and
  `9 i4 X& I- tdrop a metallic weight with a mass of (1 ± 0,02) kg, distributed over a diameter of (80 ± 2) mm, through a+ P# x; H" M& g* ~" S
distance of (100 ± 2) mm onto the toy.
1 \! z2 X) g4 r& LDetermine whether any liberated magnets or magnetic components fit entirely in the cylinder when tested in
, {1 R- J% J' L0 h9 daccordance with 5.2 (small parts test).
  b% x9 p& G( q0 y' R& O4 o5.35 Soaking test for magnets
6 w- W$ }$ @' l/ {% ]8 R0 R8 g/ GSee 4.30.2 b).
- J# V& J: @" z7 s7 U$ DSubmerge the toy or toy component completely in a container of demineralised water at a temperature of (20# J8 J4 [5 Y" {* D  O
± 5) °C for 4 min. Remove the toy, shake off the excess water and keep the toy at room temperature for 101 k5 A8 h  U# R: W: m! K: [  x
min.: t9 ]0 [# S& r. w: G
--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`---
10#
 楼主| 发表于 2012-11-12 08:54 | 只看该作者
Perform the soaking test for a total of four cycles.
9 o7 E. W7 G+ M* BImmediately after the last cycle, determine whether any liberated magnets or magnetic components fit entirely
* u0 f# a0 z7 y8 l! u+ [5 t- O  Oin the cylinder when tested in accordance with 5.2 (small parts test).8 ?- P, f) j  x" i  `2 N) o
Annex B Labelling% c& }8 c' F; x7 J8 E5 Y. [
Add the following clause:1 E) b* T$ b( R9 y
B.2.21 Magnetic/electrical experimental sets for children over 8 years
( s: E! W. ~! ESee 4.30.1 and E.44)
  H6 f1 c8 l$ y" v  \The packaging and the instructions for use of magnetic/electrical experimental sets intended for children 8, B4 y4 h: \5 C, Z
years of age or older shall carry a statement comparable or similar to the following.5 s# ^2 m4 N8 q2 p" A, H4 W5 d: U
“WARNING! Not suitable for children under 8 years. This product contains (a) small magnet(s).
+ J" ?5 y9 C) kSwallowed magnets can stick together across intestines causing serious infections and death. Seek& ?0 ?# s) b: Y- ]! f
immediate medical attention if magnet(s) are swallowed or inhaled.”; @( b. _# k9 }/ T: F6 x4 a
Annex E Rationale
% y8 a8 d# t: W) K3 U" gAdd the following clause:6 Q  t3 i+ B5 E: r# p( N* E
E.44 Magnets
- a, q8 O$ U$ ], sSee 4.30.( T4 \$ K3 ~- F1 o' ^5 n* g
These requirements are intended to address the hazards associated with ingestion of strong magnets (e.g.
7 s+ b, |2 I: \. t( A7 {* Dneodymium iron boron type magnets (“NIB”)), that are capable of causing intestinal perforation or blockage.) y( x, z7 t: `( \/ s- _
These hazards are additional to those associated with small parts such as suffocation or asphyxiation (see
8 ^8 K1 b3 |4 |% m! O# J/ ME.6). These requirements apply regardless of the age of the intended user.8 T* ?% H( d: z8 n; z% F% b
Magnets found by children can be ingested. If more than one magnet, or one magnet and a ferromagnetic
: c, s- h7 S7 y* kobject (for example an iron or nickel object) is ingested, the objects can attract each other across intestinal+ {; b! ]. C  ~9 y0 ]& S
walls and cause perforation or blockage, which can cause severe injuries that may be fatal.8 n3 \" r- q! k' v
Multiple incidents, including at least one fatality, have been reported involving ingestion of magnets resulting
4 e) C! l. S5 g1 T) B; vin perforation or blockage of the intestines. These incidents have involved children younger and older than 31 e! E: g! Y) h2 H9 x+ s  i
years of age. Medical signs associated with intestinal perforation or blockage can easily be misinterpreted# Y: P) E$ I. F
since many children exhibit only flu-like symptoms. Such misinterpretations have caused delays in the medical0 @0 H* g# j4 w: m
treatment and led to serious consequences for children.5 D: L! d# M; y! Q+ A4 g7 b
For the purpose of this standard, magnets or magnetic components that could be ingested are identified using
3 y, ^- R4 g1 `& U8 {6 D8 Z5 Jthe small parts cylinder. The small parts cylinder was originally designed to identify small parts in toys8 c7 K2 Y) P2 T* d, u+ J
intended for children under 3 years of age, which are capable of causing suffocation or asphyxiation. It was
" T- k* \, g6 x( ]: dnot designed for identifying objects that can be ingested by older children. The decision to use the small parts1 Y. A( |7 S# P# v8 ?
cylinder also for assessment of magnets or magnetic components that can be ingested was made for practical' _: f8 B8 b  k, a4 u( J4 ]* ~
reasons: The cylinder is a well known test template and it provides a safety margin since the magnets and; J, n7 b. u2 @* [7 c
magnetic components that have been involved in incidents all fit into the cylinder with a large margin. This
4 W+ \. `; S+ W; w' Asame principle has been applied in the requirements for expanding materials.
, l/ O' N7 Z. L6 NThe risk of magnets attracting each other across intestinal walls is a function of magnet strength. A limit value' f0 G! W( Z& I0 `
in the form of a magnetic flux index has been introduced to define what a sufficiently weak magnet is. Analysis
  n1 T% M1 S7 L7 Z  Oof the data indicates that only the small, powerful NIB type magnets have been involved in the known
9 W+ q, x5 |7 G5 z" s- ?  `incidents. Further analysis has determined that magnets with a magnetic flux index less than 50 kG2mm2 (0,5
) R( Z( d; B4 {2 H. [0 T) f--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`---
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