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[玩具标准] ISO8124

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发表于 2012-11-3 09:11 | 显示全部楼层 |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 3 y$ q! O+ J' u$ D& J# [

6 S# X0 n. u) N8 U. IISO 8124-1 AMD-2 2011 Draft
7 m2 ^' \' e, G3 YISO 8124-1 AMD-1 2011 Draft8 U5 ]5 i/ |: }' p3 i3 t0 K
3 N, i+ w6 g% u

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发表于 2012-11-4 18:52 | 显示全部楼层
期待正式版! ISO 8124-1:2012" A" e$ p: n2 ~$ I
http://www.iso.org/iso/home/stor ... .htm?csnumber=62327
发表于 2012-11-8 16:47 | 显示全部楼层
更新哪些内容呀?
 楼主| 发表于 2012-11-12 08:51 | 显示全部楼层
Contents Page2 {! N$ D. R5 Q) j& B! M; ~4 N
3 Terms and definitions ...........................................................................................................................3
. }7 Y, Q7 g2 ~  P, J8 k4 Requirements........................................................................................................................................35 q* o7 \* r) @$ _) Z% B1 j
4.30 Magnets and magnetic components....................................................................................................3
% W9 i" |# O9 T% r4.30.1 Magnetic/electrical experimental sets intended for children over 8 years......................................3
9 r4 ?0 Q' i2 a: @& O4.30.2 Toys other than magnetic/electrical experimental sets intended for children over 8 years..........41 X* N" |4 A1 `
5 Test methods.........................................................................................................................................4# m- v( M) _, p
5.31 Tension test for magnets......................................................................................................................5/ W. Z. c1 S4 S* L  P& R) e
5.31.2 Toys with magnet(s) or magnetic component(s)..................................................................................5
8 O4 R: _5 o- |6 e7 b5 t0 r5.31.3 Toys that contain one magnet only and a mating metal component...............................................5; e' \0 M7 M/ s! H. T0 k; [6 n9 x
5.31.4 Toys that contain one magnet only and no mating metal component.............................................59 z) ?+ V% Y9 c! u/ l& [: |
5.32 Magnetic flux index...............................................................................................................................6
# E  j0 |1 t: I3 H" d/ n5.32.1 Principle.................................................................................................................................................6
0 x# E$ D2 g3 B& d; b8 H5.32.2 Apparatus ..............................................................................................................................................6
7 }( d, t7 O( \$ i/ D* ?5 s2 A5.32.3 Procedure ..............................................................................................................................................6
# n. u9 d% D9 B- W- _8 t5.32.4 Calculation of magnetic flux index ......................................................................................................7
; @9 ]0 g* j# `9 X7 K5.33 Cycling ...................................................................................................................................................75 M% E) u  u" w! h; H! D5 R; [
5.34 Impact test for magnets ........................................................................................................................7/ Y  q3 \3 s; O/ W. j* K
5.35 Soaking test for magnets......................................................................................................................7  x3 E& w9 A* b5 C) `9 e  b
B.2.21 Magnetic/electrical experimental sets for children over 8 years ......................................................8) }0 q  g1 F2 L9 a4 y% @
E.44 Magnets .................................................................................................................................................8

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 楼主| 发表于 2012-11-12 08:52 | 显示全部楼层
3 Terms and definitions! z- a/ ~9 b# I
Add the following definitions:  w; d+ N- R9 X
3.xx. B6 g3 J" E- T. w! L
magnetic component' W, d; r6 R. k* K
any part of a toy which contains an attached or fully or partially enclosed magnet% n' h2 `: k: C, I3 R: T2 x
3.yy/ `) i' e' F/ `8 i$ m5 q5 [/ G
magnetic/electrical experimental set
+ L  ]# u3 }& S' x; B. @/ ^toy containing one or more magnets intended for carrying out educational experiments involving both1 ^2 D- z9 E* I# m' y1 h+ w
magnetism and electricity# x. V* `) [: M0 ~9 L+ P
3.zz7 e" s, D( X- ]7 |  e( H3 F
functional magnet in electrical or electronic components of toys
  F* q( W7 n! o6 Rany magnet necessary for the function of motors, relays, speakers and other electrical or electronic5 D  _( V4 D5 z9 w  _7 C) P
components in a toy where the magnetic properties are not part of the play pattern of the toy
: @+ @$ K" M' p+ N* X0 U0 T5 r4 Requirements
( N9 [& U7 [0 RAdd the following requirements:
( D& U0 r. U# @7 w$ L/ g4.30 Magnets and magnetic components/ |6 R& d5 i3 K( X) c  n( c
See Clause E.44.
. k1 q. n: U' A6 n1 C4.30.1 Magnetic/electrical experimental sets intended for children over 8 years
4 x2 v% H" f) I9 w6 rMagnetic/electrical experimental sets intended for children 8 years and over that contain magnetic- z7 y: P5 [, s4 f3 y/ W3 j( i
components shall carry a warning (see B.2.21 for guidance) if they both:0 @( y8 C* C8 p
- have a magnetic flux index greater than 50kG2mm2 (0,5 T2mm2) when tested according to 5.32 (magnetic
2 _% \! ?; n* k  Y( y1 q/ O( [flux index)
9 U7 V" I! e( v* D4 R4 C- fit entirely in the cylinder when tested according to clause 5.2 (small parts test)# F' w! A( u! _0 h& D0 u/ g9 g6 o
NOTE Magnetic/electrical experimental sets intended for children under 8 years shall comply with the requirements in
8 h3 j+ F& H4 w/ a: z! Q4.30.2 (toys other than magnetic/electrical experimental sets).
5 U) L! k% A. j: x+ @These requirements do not apply to functional magnets in electrical or electronic components of toys.
 楼主| 发表于 2012-11-12 08:53 | 显示全部楼层
4.30.2 Toys other than magnetic/electrical experimental sets intended for children over 8 years
, M8 {% W( u, n* A4 X' W1 Ra) Any loose as received magnet(s) and magnetic component(s) shall either have a magnetic flux index less5 u" L2 T0 G2 u. L8 h% h4 Q. a
than 50 kG2mm2 (0,5 T2mm2) when tested in accordance with 5.32 (magnetic flux index), or shall not fit
- J* S# m) m# g( K+ \2 Hentirely in the cylinder when tested in accordance with 5.2 (small parts test).8 S1 l( `3 g. {9 v( M& r
b) Wooden toys, toys intended to be used in water and mouth pieces of mouth-actuated toys with magnets; n3 M  p1 n, Y
or magnetic components shall be tested in in accordance with 5.35 (soaking test for magnets) before
" B5 q$ i4 n- D  N" p5 Jbeing tested in accordance with 4.30.2 c) below.! E6 ^3 r  c" c* D) C  D! B  k, x
c) The following tests shall be carried out in the prescribed order on all unique magnetic component(s). The
% W3 n9 H- g. r& Bcomponents used for this testing shall not have been previously subjected to normal use and reasonably
* V8 d0 P+ D8 h: H  Fforeseeable abuse tests. Any magnet(s) and magnetic component(s) that become liberated from a toy, or0 w- f% W' q9 M2 L: @. M
from a loose as received magnetic component shall either – when tested according to the tests listed, t/ m3 f5 R$ z9 N" f  ]# |
below - have a magnetic flux index less than 50 kG2mm2 (0,5 T2mm2) when tested in accordance with
9 j0 R. ?( `; u3 v* o# H. ^5.32 (magnetic flux index), or shall not fit entirely in the cylinder when tested according to 5.2 (small parts( r* k8 F. f$ R% W. s3 b. \
test).
% w( l0 K$ R9 _⎯ 5.33 (cycling)7 d% g: W* V* i5 V  F% e$ d
⎯ 5.24.2 (drop test) or if applicable, 5.24.3 (tip over test for large and bulky toys)
; r8 ~6 x5 K8 S6 Q" B* x7 @, p& w! M4 M⎯ 5.24.5 (torque test)$ ]& s- H" U: C8 v
⎯ 5.24.6.1 (tension test, general procedure)
6 q$ h% ]* j- f5 P$ }( y% g/ b$ m⎯ 5.24.6.2 (tension test for seams in soft-filled (stuffed) toys and beanbag-type toys), if applicable8 [2 C8 i& r) a* g( X, J
⎯ 5.34 (impact test for magnets)0 q( t  s, w6 i: b: R
⎯ 5.24.7 (compression test), for magnets that are accessible but cannot be grasped (as specified in
! u4 C  y0 n2 T3 @* b5.24.6.1 (general procedure)
; c- m$ P$ C) E5 W& v# C⎯ 5.31 (tension test for magnets))8 r& c1 @( I' ^& l" [
NOTES4 [; W) u* G$ x* f& @$ k! T. C
1 Examples of unique magnetic components are rods of different sizes or shapes containing magnets.
* v4 l! v- E. i) {1 k2 If the toy contains one magnet, the component holding the magnet is considered to be a unique component.
2 w. \) {0 b5 d! Y( s/ x; L! v3 An example of a magnet that is accessible but cannot be grasped is a magnet that is recessed.
) w+ D" c/ M) S  U8 v5 |These requirements do not apply to functional magnets in electrical or electronic components of toys# N2 ?0 Z, A1 k+ a1 N7 s/ v4 y! z
5 Test methods* L  Y2 k; c' Y/ |2 H) Z& l/ u
Replace the second paragraph of clause 5.14 (impact test for toys that cover the face) with the following:! \* c4 E+ X2 ~5 e& X
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. m! M+ i5 Z2 l% D. i
the horizontal upper surface of the toy in the area that would cover the eyes in normal use.4 ^: b4 J: q+ j
Add the following new note to clause 5.24.1 (reasonably foreseeable abuse tests, general)
2 _( r9 K+ L  q& x* mNOTE: The tests according to clause 4.30.2 are carried out in the order specified in the clause, on a toy or
3 `6 G* V) g2 e4 J5 }, z9 bpart of a toy that has not been previously tested according to this clause.
, ?% @( ?/ J# B; U% g- \, E* GAdd the following test methods:
. |  G- ~/ K8 ~--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`---
 楼主| 发表于 2012-11-12 08:53 | 显示全部楼层
5.31 Tension test for magnets
$ ~. H6 s7 ~1 o. t* KSee 4.30.2 c).& E" D) o4 m1 r: |$ S
5.31.1 Principle$ {) W6 {0 u' c2 ?+ H  I+ z
These tests simulate the intended or reasonably foreseeable play pattern. It is recognized that toys may2 x7 n+ E( s2 o) o5 e
contain a single magnet or a combination of magnets, magnetic components and/or metal mating parts and
* i* Q7 e/ {* v& O: ythe tests are designed to simulate a reasonably foreseeable play pattern using these components to attach
" G8 y: W, z% W% H2 Hand detach the magnetic parts.( q0 T" [) S8 F! j
For toys that contain more than one magnet/ magnetic component, the test specified in 5.31.2 (toys with
! \" N' M6 ~0 S% _" \. p* Cmagnet(s) or magnetic component(s)) shall be carried out unless it is not possible to perform the test without
8 J0 t6 }; I0 j$ hdamaging the toy. In the latter case, the test shall be carried out using the reference disk, as described in
4 }/ I5 Z7 s2 @8 ~5.31.4 (toys that contain one magnet only and no mating metal component).
: {3 d% h- I" J9 w! |6 ANOTE: An example of a case where it is not possible to perform the test in 5.31.2 with magnet(s) or magnetic% s' C* V: z7 i2 W+ O/ J2 q3 w
component(s) without damaging the toy, is a toy figurine with one accessible but non-graspable magnet in each foot.5 X& p9 m- \" y6 ?2 L
Toys that contain one magnet only and a mating metal component shall be tested according to 5.31.3 (toys
# F4 G7 r$ s7 d5 L! |that contain one magnet only and a mating metal part).
+ s* s5 ~) c" F' y; cToys that contain one magnet only and no mating metal component, shall be tested according to 5.31.4 (toys8 U3 u4 E- ^0 W- _3 \
that contain one magnet only and no mating metal component), since this simulates a play pattern where the: W+ n3 |4 S0 ?
toy is attached and detached to a surface that is not delivered with the toy.* L# b  `! ^+ q7 B' |
5.31.2 Toys with magnet(s) or magnetic component(s)3 w$ k8 M5 q% J7 [( |
Identify the magnet or magnetic component in the toy that is most likely to be able to detach. The identified( N: Y- ], z( ]" G3 \# P. A& [- d
magnet or magnetic component shall be subjected to the tension test for magnets.2 E, W  I. n% c3 e# C
If it is not possible to determine which magnet or magnetic component(s) in the toy is most likely to be able to' {3 y1 I: l' h7 l
detach the magnet under test, it is permissible to repeat the test with another magnet or magnetic component0 y; k2 K* O1 f' F6 e
from the toy.; U1 ]: p# [, [
Without damaging the toy, place the magnet or magnetic component in the orientation of attraction, as close
3 |9 S( `4 a; Jas possible, making contact if possible, to the magnet to be tested. Gradually apply a pulling force to the1 L% \6 q- D. O4 b% J$ B* _9 \
magnet/magnetic component until it separates from the magnet under test. Perform the test 10 times or until$ s! o7 N0 l: k, n$ n
the magnet under test is detached from the toy, whichever occurs first., _8 U; H7 A5 P2 I
Repeat the procedure for any other magnet that in accordance with 4.31.2 (toys other than magnetic/electrical
# `' a( @! e, ^) Z- `; f9 Aexperimental sets intended for children over 8 years) shall be subjected to the tension test for magnets.
. D  ?+ v2 y7 o- W' r5.31.3 Toys that contain one magnet only and a mating metal component$ @; V- g4 o9 E# n" t- Q
Without damaging the toy, place the metal components as close as possible, making contact if possible, to the& ^8 q1 _0 O% m! }; j' \: E
magnet to be tested. Gradually apply a pulling force to the metal component until it separates from the" U# E6 [' I# ~
magnet under test. Perform the test 10 times or until the magnet under test is detached from the toy,
, q: u) v( y+ L. swhichever occurs first.- o4 h* i+ c. P2 D3 Y' _* J
5.31.4 Toys that contain one magnet only and no mating metal component+ V3 ~. P( i9 H- P, c  Z
5.31.4.1 Apparatus* b. _; U& G) s% O7 r' g4 _
Nickel disc with a minimum nickel content of 99 %, and having the following dimensions:% p7 u' L- Z1 v2 a3 |" a
- diameter: (30 ± 0.5) mm+ T5 t( W+ `! J. p: X
- thickness: (10 ± 0.5) mm
 楼主| 发表于 2012-11-12 08:53 | 显示全部楼层
5.31.4.2 Procedure5 N4 h. H% q& ?; H' v3 P
Without damaging the toy, place the flat part of the disc as close as possible, making contact if possible, to the
/ H4 {9 s/ I  L& X) t% Hmagnet to be tested. Gradually apply a pulling force to the disc until it separates from the magnet under test.
6 x! g1 M0 P$ B9 ~Perform the test 10 times or until the magnet under test is detached from the toy, whichever occurs first.4 u; ~7 x; y$ r1 D( d% b2 z
5.32 Magnetic flux index
8 I) N, R0 }' ~* @( JSee 4.30.1, 4.31.2 a) and c).
9 w4 S. K/ Q4 ?7 S! T4 X  E$ r  u+ j5.32.1 Principle- K  |$ W$ Z$ B; r3 i* ?
The magnetic flux index is calculated based on the results from measurements of the flux density and the pole
! j8 ], {) E$ ?& G; m8 hsurface area.6 o, d( F7 S( R& }% u% l
5.32.2 Apparatus; m" J" Z7 X$ |7 K. h
5.32.2.1 Direct current field Gauss meter, capable of determining the field to an accuracy of 5 G.6 T7 x$ J+ o+ Q
The meter shall have an axial type probe with
3 U- _7 b+ k* Q- Q( F* {: v1 _- an active area diameter of (0,76 ± 0,13) mm" y& f8 g3 l/ i: b4 ], ]& W: s
- a distance between the active area and probe tip of (0,38 ± 0,13) mm' ]0 J- L+ o5 {
5.32.2.2 Calliper, or similar device with an accuracy of 0,1 mm.
1 r& h$ b  R) H2 e* V5.32.3 Procedure7 P$ B& X9 S7 J  y3 k
5.32.3.1 Measurement of flux density
8 |+ E2 p4 `9 G# M# vIdentify the surface of the magnet that is the pole.: c. k1 T* t! R
Place the tip of the Gauss meter probe in contact with the pole surface of the magnet. For a magnetic
# |8 B. _& w  m. w1 z+ Lcomponent (where the magnet is fully or partially imbedded in part of the toy), place the tip of the probe in
# q# }4 ~' ^2 n: F7 Q7 E! Gcontact with the surface of the component.
* N. T( V* |/ R/ TMaintain the probe in a position perpendicular to the surface.
9 x/ l$ z6 O$ l& M) j6 ]Move the probe across the surface to locate the maximum absolute value of the flux density. Record the, k6 R  }) s/ T
maximum absolute value of the flux density.
. L% f4 B( X- h  [- G' c4 x5 tNOTE Since the meter can read both negative and positive values, the absolute value is used for calculations.# u9 [' _2 N) ?$ r9 w2 y
5.32.3.2 Measurement and calculation of the pole surface area' H8 ^: g/ I9 U0 q' v
If the magnet is imbedded/attached as part of a magnetic component, extract the magnet from the component,6 h' m& R+ `% `. G1 A
even if it is necessary to break the toy.; N+ j* g* G0 u3 e6 O. \
If the pole surface of the magnet is flat, measure the dimensions with an accuracy of ± 0,1 mm and calculate
2 D$ L$ i8 E. F) y; Rthe area using the appropriate geometric formula.* ?/ _! c8 v) V) X% o4 q& \) s
If the pole is not flat, (for example hemispherical) measure the maximum diameter of the magnet  I, A+ F1 ^2 r
perpendicular to an axis through the magnetic poles (see Figure XX), with an accuracy of ± 0,1 mm and$ F/ ?9 A' {, K8 e" C7 u
calculate the area of the corresponding cross section. For multi-pole magnets, measure and calculate the
; k& d4 ^( `7 K" i# k0 Tarea of the largest single pole, which can be identified using magnetic field viewing film or equivalent.
 楼主| 发表于 2012-11-12 08:54 | 显示全部楼层
NOTE An example of a multi-pole magnet is a rubberized/plastoferrite magnet, consisting of multiple strips or poles.
8 V/ u; d5 S* O$ o" p2 MFigure XX – Maximum diameter of magnet with a non-flat pole
7 b' E" J8 @& hKey
" ?8 \) Y9 v$ H) j1 maximum cross-section perpendicular to the axis- v) p- s+ a6 u8 B
2 axis through the magnet poles% y7 z7 l2 f6 Z
5.32.4 Calculation of magnetic flux index" O4 |# S& S, w
The flux index (kG2mm2) is calculated by multiplying the calculated area of the pole surface (mm2) of the3 [$ a3 M) h3 i: w" M
magnet by the square of the maximum flux density (kG2).6 A8 q. ?0 p3 @$ y* }- e
5.33 Cycling
; p1 B6 N/ C$ ZSee 4.32.2 c).
3 F2 D6 N, {9 B# N  n& P, S, nTen cycles as described below, shall be performed on the as-received magnet(s) or magnetic component(s).
7 o* t( f8 D) A8 P: s( iThe magnet or magnetic component shall be brought together to a distance that initiates magnetic attraction,
* p( U9 E  x! c* A9 M3 xbe released, and then pulled apart to the distance where magnetic attraction ceases. Each attachment and% X: }2 L" x3 ]/ k. N$ E' m
detachment shall count as one cycle. If no other magnets or magnetic components are provided with the toy,
2 `& ^- S5 E" v" v8 H# ]the mating metal part or surface, according to the toy’s intended play pattern, shall be used for cycling
  K- M# X2 N! P% ]' o+ d+ qpurposes. If no other metal parts or surfaces are provided with the toy, the apparatus described in 5.31.4 shall/ I1 j4 u; |6 C$ D3 A. r
be used for cycling purposes.
2 |7 K; Q/ S: K' o; E( U$ w5 g; m5.34 Impact test for magnets
! [3 O/ q; x& _7 R. _See 4.32.2 c).
/ E. R, Z# ~4 |* J2 ~Place the relevant component of the toy in the most onerous position on a plane horizontal steel surface and
+ e. ]* z! `: Z. }% M" Rdrop a metallic weight with a mass of (1 ± 0,02) kg, distributed over a diameter of (80 ± 2) mm, through a
. v# S+ X$ q. d& S3 P) w+ O9 ddistance of (100 ± 2) mm onto the toy.3 _  D* j9 z8 X! b! Q' _
Determine whether any liberated magnets or magnetic components fit entirely in the cylinder when tested in" H6 B/ g6 Z+ V/ j
accordance with 5.2 (small parts test).
  O% ~8 `' ^. m& C/ V4 N- s* f5.35 Soaking test for magnets7 p9 ]  ~' f! u: J6 s
See 4.30.2 b).9 X; ^: n8 N# ^3 x' `
Submerge the toy or toy component completely in a container of demineralised water at a temperature of (20
9 {9 @; ~9 j  U4 A  l) [5 f± 5) °C for 4 min. Remove the toy, shake off the excess water and keep the toy at room temperature for 10
# z9 G' n3 J; ^7 X% Tmin.8 u- s+ I6 @0 F" X( e) D* F
--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`---
 楼主| 发表于 2012-11-12 08:54 | 显示全部楼层
Perform the soaking test for a total of four cycles.
( k$ M4 ]2 v5 f1 Q6 b  K2 kImmediately after the last cycle, determine whether any liberated magnets or magnetic components fit entirely* q9 d4 e* s3 ]% l* r' |, u8 T
in the cylinder when tested in accordance with 5.2 (small parts test).
" `( O; @/ h2 D$ r5 S' TAnnex B Labelling
$ g) P0 S$ ?" |Add the following clause:
. R  Z' c9 E" Y# @; cB.2.21 Magnetic/electrical experimental sets for children over 8 years( Y: ]3 R8 k$ O/ L+ B  U
See 4.30.1 and E.44)
6 l2 _# P) t* j$ B% ^+ P" Z2 oThe packaging and the instructions for use of magnetic/electrical experimental sets intended for children 8
3 R  o' c9 k3 K. syears of age or older shall carry a statement comparable or similar to the following.& T- G2 c) U/ e7 ?
“WARNING! Not suitable for children under 8 years. This product contains (a) small magnet(s).
/ ], V% V' f# e. G9 G8 M. o+ b+ ^Swallowed magnets can stick together across intestines causing serious infections and death. Seek; \8 l8 \) T3 g
immediate medical attention if magnet(s) are swallowed or inhaled.”
/ ]/ ]% C4 A: _" N! LAnnex E Rationale; }5 S* h3 B- [. e5 g% m. q
Add the following clause:
6 t5 ^$ f5 ^! B, I! g" e) ME.44 Magnets
/ s+ d+ W( N: y# V* _* ~5 b3 B/ oSee 4.30.
( p! h" S3 z6 j9 bThese requirements are intended to address the hazards associated with ingestion of strong magnets (e.g.
' `/ L6 m) s% A8 o0 o9 {neodymium iron boron type magnets (“NIB”)), that are capable of causing intestinal perforation or blockage.
* K2 D& ^# I  wThese hazards are additional to those associated with small parts such as suffocation or asphyxiation (see
( L4 U( s; o4 G; _  g2 zE.6). These requirements apply regardless of the age of the intended user.
. I8 u: _; u, u+ P) _Magnets found by children can be ingested. If more than one magnet, or one magnet and a ferromagnetic0 |$ R9 s- f. Z3 W: E) J- q
object (for example an iron or nickel object) is ingested, the objects can attract each other across intestinal
% K' Z/ L' S; i# N/ U# awalls and cause perforation or blockage, which can cause severe injuries that may be fatal." r1 U0 n! e6 }1 m
Multiple incidents, including at least one fatality, have been reported involving ingestion of magnets resulting
7 B. L6 Q/ {( k( xin perforation or blockage of the intestines. These incidents have involved children younger and older than 34 j9 Z- ?" w9 Y, B# q* w
years of age. Medical signs associated with intestinal perforation or blockage can easily be misinterpreted
3 A" B/ J5 ^8 C4 }1 s) Osince many children exhibit only flu-like symptoms. Such misinterpretations have caused delays in the medical2 G  ^+ |+ A' L5 _2 }( S
treatment and led to serious consequences for children.( a0 a2 n( `' K7 Z# X
For the purpose of this standard, magnets or magnetic components that could be ingested are identified using
1 d5 o: _& r2 }. k1 [3 l) ]% L2 `: Bthe small parts cylinder. The small parts cylinder was originally designed to identify small parts in toys
, ^3 x1 @7 c* a% c. sintended for children under 3 years of age, which are capable of causing suffocation or asphyxiation. It was
9 K% ~* h7 n6 g# L- gnot designed for identifying objects that can be ingested by older children. The decision to use the small parts
$ t8 P; P% c2 S9 \0 ~cylinder also for assessment of magnets or magnetic components that can be ingested was made for practical
" a" ?( h4 \4 F% B! z+ R1 j" Ereasons: The cylinder is a well known test template and it provides a safety margin since the magnets and
7 Y3 U0 ?( h! D7 J0 @6 d1 ]" Dmagnetic components that have been involved in incidents all fit into the cylinder with a large margin. This
; b" Y8 ~& l& |0 h8 {: hsame principle has been applied in the requirements for expanding materials.: K4 O5 P1 C" B; E: ?
The risk of magnets attracting each other across intestinal walls is a function of magnet strength. A limit value% P. |( |9 D7 n' o
in the form of a magnetic flux index has been introduced to define what a sufficiently weak magnet is. Analysis
5 u  S# k: @2 v! |of the data indicates that only the small, powerful NIB type magnets have been involved in the known
0 V7 q, |; ?# t" H: w* Fincidents. Further analysis has determined that magnets with a magnetic flux index less than 50 kG2mm2 (0,5
  Q$ G: G7 u( R8 @# m--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`---
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