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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
$ v* `3 r) {" [
* O% D8 L* T# c$ |) r: A& C' MISO 8124-1 AMD-2 2011 Draft8 x! }. Y+ I5 k' K* X$ x
ISO 8124-1 AMD-1 2011 Draft1 A9 H3 {$ c% g* A' k

+ L& S1 w$ T  T  h& s/ x- E, r) C

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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
1 N7 ^' K# N8 l) l2 h$ n3 i- k0 Thttp://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 Page2 [9 p. |2 [9 `2 j. i  p
3 Terms and definitions ...........................................................................................................................3
4 h" N' ?( X1 ~- ]/ C6 G4 Requirements........................................................................................................................................3
+ V  ~/ c1 @2 {4.30 Magnets and magnetic components....................................................................................................3
8 Z+ O/ ^+ G0 {$ G' @9 p/ g8 ]( n4.30.1 Magnetic/electrical experimental sets intended for children over 8 years......................................3
: ]5 X$ H$ I; @4.30.2 Toys other than magnetic/electrical experimental sets intended for children over 8 years..........4
5 C1 }' Y3 n& u/ y. _" P5 Test methods.........................................................................................................................................4
! u  R' x" t' {& s6 _+ f% _& ~5.31 Tension test for magnets......................................................................................................................5
" a5 A7 k* n$ W5.31.2 Toys with magnet(s) or magnetic component(s)..................................................................................5
' t+ u2 u0 Y1 @1 o" U5.31.3 Toys that contain one magnet only and a mating metal component...............................................5
' k& o- ]( H, H6 A& T4 @# G; D5.31.4 Toys that contain one magnet only and no mating metal component.............................................53 x0 V1 J9 L0 h2 O4 C) H5 c- s
5.32 Magnetic flux index...............................................................................................................................6
( |, @2 P. l2 a  ^% t5.32.1 Principle.................................................................................................................................................60 N; t# Z  ?8 M0 j$ ?( y5 e2 y
5.32.2 Apparatus ..............................................................................................................................................6
0 I, F! V  K2 s1 j- ~5 G5.32.3 Procedure ..............................................................................................................................................6
$ O8 v6 R& @$ X# o$ e6 B5.32.4 Calculation of magnetic flux index ......................................................................................................7& T9 m5 C& r* m' i
5.33 Cycling ...................................................................................................................................................7
4 A0 G, h. Q# h# d/ f7 c5.34 Impact test for magnets ........................................................................................................................7, W8 |: y# T& S' C" _& p- K
5.35 Soaking test for magnets......................................................................................................................7
! p, h8 b7 o, d' e! pB.2.21 Magnetic/electrical experimental sets for children over 8 years ......................................................8
/ \6 r+ p2 S; IE.44 Magnets .................................................................................................................................................8

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 楼主| 发表于 2012-11-12 08:52 | 只看该作者
3 Terms and definitions7 M" S/ D# K: O4 l2 j
Add the following definitions:: z( k7 n* t' R4 {' T* r  ?
3.xx
6 ^5 l( u' l/ x) jmagnetic component
! I5 {/ Z6 V5 e; k7 Iany part of a toy which contains an attached or fully or partially enclosed magnet
3 [! ]8 |3 {8 y: |" o6 D* x) h3.yy, P. C0 \! A' R' U' |
magnetic/electrical experimental set
* ]  N/ C& U. z9 Q8 O8 f# O) ^toy containing one or more magnets intended for carrying out educational experiments involving both
' N  S/ ?& s7 _magnetism and electricity
( q" O. q" ~0 x. B3.zz, N$ ^: V6 w* V" E
functional magnet in electrical or electronic components of toys
. V8 }$ y7 V; Y% \9 D; Sany magnet necessary for the function of motors, relays, speakers and other electrical or electronic; l. j! c7 m* {7 K3 v' j( ?1 g
components in a toy where the magnetic properties are not part of the play pattern of the toy
6 N& P0 u- D0 b+ p$ O$ l4 Requirements
$ H/ e5 N) d4 v& W/ ?5 \( |# qAdd the following requirements:0 l2 |  z) @" A$ e" F
4.30 Magnets and magnetic components
  p8 d+ u% K! p2 V" F+ BSee Clause E.44.
# @3 q6 \. x' p  U3 i4.30.1 Magnetic/electrical experimental sets intended for children over 8 years  }; W, V; j: U1 n# W
Magnetic/electrical experimental sets intended for children 8 years and over that contain magnetic$ Y6 L( `: R, `
components shall carry a warning (see B.2.21 for guidance) if they both:: r" k* O6 F2 d! Q/ G
- have a magnetic flux index greater than 50kG2mm2 (0,5 T2mm2) when tested according to 5.32 (magnetic- n, G2 P; p0 g
flux index)
* \' A% f! [5 C$ \3 s- L/ k3 z+ Q- fit entirely in the cylinder when tested according to clause 5.2 (small parts test)
9 O/ H% S$ j6 F( [( X9 gNOTE Magnetic/electrical experimental sets intended for children under 8 years shall comply with the requirements in
/ G, Z5 K; @4 d7 e7 M% ^4.30.2 (toys other than magnetic/electrical experimental sets)./ _" g( `( e( {6 x& V
These requirements do not apply to functional magnets in electrical or electronic components of toys.
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 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
% u( ]6 E1 B( V( S  ^9 K$ {  X" ^a) Any loose as received magnet(s) and magnetic component(s) shall either have a magnetic flux index less
1 g8 u" {* Q% U$ q" f9 g: wthan 50 kG2mm2 (0,5 T2mm2) when tested in accordance with 5.32 (magnetic flux index), or shall not fit( w4 f8 w1 L) P: |/ T* }2 Z
entirely in the cylinder when tested in accordance with 5.2 (small parts test).8 v/ c6 b5 v+ A# N: y4 G9 ]. }; Q
b) Wooden toys, toys intended to be used in water and mouth pieces of mouth-actuated toys with magnets3 z3 d# t6 ^1 M+ q
or magnetic components shall be tested in in accordance with 5.35 (soaking test for magnets) before
' Y" h) |+ H- t* ^2 r8 fbeing tested in accordance with 4.30.2 c) below.
% d+ d4 a; y) j$ w3 F  i% `c) The following tests shall be carried out in the prescribed order on all unique magnetic component(s). The7 O' D5 a. d4 Y/ h4 g' j
components used for this testing shall not have been previously subjected to normal use and reasonably
5 x, F- q# W& d7 B2 Wforeseeable abuse tests. Any magnet(s) and magnetic component(s) that become liberated from a toy, or
$ S& V; K2 @8 Efrom a loose as received magnetic component shall either – when tested according to the tests listed$ N1 n% Z1 Q: W8 c+ _8 l/ z5 x5 {
below - have a magnetic flux index less than 50 kG2mm2 (0,5 T2mm2) when tested in accordance with
0 M7 v3 [6 T3 t8 g4 r5.32 (magnetic flux index), or shall not fit entirely in the cylinder when tested according to 5.2 (small parts
- |  P. u9 G! z* F- vtest).
/ |. T- H& ^4 \" F; {& B⎯ 5.33 (cycling)
8 u6 n. U6 {4 I⎯ 5.24.2 (drop test) or if applicable, 5.24.3 (tip over test for large and bulky toys)
  C5 p" e4 x/ g⎯ 5.24.5 (torque test)% h8 @/ R( E( ~$ k& v" a
⎯ 5.24.6.1 (tension test, general procedure)* j, x4 S) k+ V' d+ x( @
⎯ 5.24.6.2 (tension test for seams in soft-filled (stuffed) toys and beanbag-type toys), if applicable5 ~$ [$ e  N6 W5 n5 r/ {4 v
⎯ 5.34 (impact test for magnets)
5 E6 `) J8 Y9 q9 ~⎯ 5.24.7 (compression test), for magnets that are accessible but cannot be grasped (as specified in
4 |, L& I1 q. B8 r: e8 E5.24.6.1 (general procedure)  u  Q7 B+ R4 S+ G
⎯ 5.31 (tension test for magnets))% S: R  n  |* C0 n3 b5 ^( m
NOTES" |) z$ G6 [  X% T/ O9 ?. C8 A
1 Examples of unique magnetic components are rods of different sizes or shapes containing magnets.
5 `/ S( K7 Q. _; E* F0 y, Z7 \2 If the toy contains one magnet, the component holding the magnet is considered to be a unique component.6 X7 a  O, F# j% S
3 An example of a magnet that is accessible but cannot be grasped is a magnet that is recessed.' y  y3 e  }6 k" w- p, ]) O
These requirements do not apply to functional magnets in electrical or electronic components of toys( w; a7 M: p5 a. E" S. F% k" i. x
5 Test methods5 K( a+ ?: \3 k5 z0 O, ^; X
Replace the second paragraph of clause 5.14 (impact test for toys that cover the face) with the following:+ a) b# Y( A$ m
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 onto9 \+ f- N0 x/ h0 n9 C/ H5 B6 ?/ s
the horizontal upper surface of the toy in the area that would cover the eyes in normal use.) O0 \' V3 L  c. }
Add the following new note to clause 5.24.1 (reasonably foreseeable abuse tests, general)3 }, f" |- m/ v; F2 I8 S- |
NOTE: The tests according to clause 4.30.2 are carried out in the order specified in the clause, on a toy or, j' |4 M6 z  k6 q" G$ T5 T! P
part of a toy that has not been previously tested according to this clause.& v" V2 P# d, Z+ i
Add the following test methods:3 f  @6 p) B, _* `2 @
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 楼主| 发表于 2012-11-12 08:53 | 只看该作者
5.31 Tension test for magnets5 d8 H- y+ o" k: j4 V
See 4.30.2 c).! `& l8 G: A" u0 `* D+ F
5.31.1 Principle
/ w6 l# s# n6 j. ~8 i. dThese tests simulate the intended or reasonably foreseeable play pattern. It is recognized that toys may- w' A+ n, ^$ @& z) C- ^
contain a single magnet or a combination of magnets, magnetic components and/or metal mating parts and
3 G5 d3 D5 c- Ethe tests are designed to simulate a reasonably foreseeable play pattern using these components to attach
* L$ w! @! L$ E, A8 |! J: m1 ]  {and detach the magnetic parts.9 i# t& W$ M9 b) }3 z1 Y
For toys that contain more than one magnet/ magnetic component, the test specified in 5.31.2 (toys with, {/ _( F' ~. X' G# x0 w
magnet(s) or magnetic component(s)) shall be carried out unless it is not possible to perform the test without
: h) x8 r) S! ]/ \damaging the toy. In the latter case, the test shall be carried out using the reference disk, as described in
; w. E% K3 R& W5 w' Y2 y5.31.4 (toys that contain one magnet only and no mating metal component).
: }; k# d, I+ |NOTE: An example of a case where it is not possible to perform the test in 5.31.2 with magnet(s) or magnetic5 t/ }- b6 Y; B! ^/ x
component(s) without damaging the toy, is a toy figurine with one accessible but non-graspable magnet in each foot.7 b; Q! L& N8 A) r
Toys that contain one magnet only and a mating metal component shall be tested according to 5.31.3 (toys5 A: e% n; D3 t  d8 z1 y& _2 F
that contain one magnet only and a mating metal part).% D* O# L, {# z; B
Toys that contain one magnet only and no mating metal component, shall be tested according to 5.31.4 (toys
# I5 A  d5 O* a! T$ S6 n8 g: m4 ^! s0 hthat contain one magnet only and no mating metal component), since this simulates a play pattern where the" O  Y, Y9 A! N* a; S" v
toy is attached and detached to a surface that is not delivered with the toy.+ u: [7 U' C' ]- }) t3 U" j- V
5.31.2 Toys with magnet(s) or magnetic component(s): L! c' G9 W4 S. U/ @' t9 o6 S
Identify the magnet or magnetic component in the toy that is most likely to be able to detach. The identified
' V7 C2 Z1 b! t3 A+ S8 rmagnet or magnetic component shall be subjected to the tension test for magnets.( L( O; ?% Z7 ?! E! `; o# T, q
If it is not possible to determine which magnet or magnetic component(s) in the toy is most likely to be able to
3 {! A1 ~* X) I/ o( Z" j' N$ edetach the magnet under test, it is permissible to repeat the test with another magnet or magnetic component8 N; I) r2 ]$ n# v+ C# t# ^
from the toy.
) h! u- w) q* Q' z* D9 D3 ^Without damaging the toy, place the magnet or magnetic component in the orientation of attraction, as close
3 |0 N, e+ P) j2 r9 U% O# ^, Yas possible, making contact if possible, to the magnet to be tested. Gradually apply a pulling force to the
9 S7 s% i$ ^# M" F( Y: L2 l3 v: ymagnet/magnetic component until it separates from the magnet under test. Perform the test 10 times or until  s+ r; A9 D  G
the magnet under test is detached from the toy, whichever occurs first.
' ~% I# n- V" I5 GRepeat the procedure for any other magnet that in accordance with 4.31.2 (toys other than magnetic/electrical
% V1 H  q9 y7 g! V7 P- gexperimental sets intended for children over 8 years) shall be subjected to the tension test for magnets.
; a! o; g6 z' q2 w$ @- c, ^" _5.31.3 Toys that contain one magnet only and a mating metal component$ T2 m+ ^8 f, s
Without damaging the toy, place the metal components as close as possible, making contact if possible, to the  d* _- f: U6 _$ {
magnet to be tested. Gradually apply a pulling force to the metal component until it separates from the. k0 ?# g) P& u4 K
magnet under test. Perform the test 10 times or until the magnet under test is detached from the toy,5 r; a2 y! `2 h' F! [5 [: g+ ~
whichever occurs first.8 V" [  v6 t" ~, R: O
5.31.4 Toys that contain one magnet only and no mating metal component/ n# @0 E) u, F! F
5.31.4.1 Apparatus$ k; X5 X  J* A; ~9 a
Nickel disc with a minimum nickel content of 99 %, and having the following dimensions:
$ f  V% @4 T; S- diameter: (30 ± 0.5) mm( |% }/ _3 X& Y3 P' u4 p( c
- 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 Procedure
" R8 T$ B, a. g- a7 Y3 UWithout damaging the toy, place the flat part of the disc as close as possible, making contact if possible, to the1 R/ O2 R/ r* H- B/ d( S8 z( ~
magnet to be tested. Gradually apply a pulling force to the disc until it separates from the magnet under test.6 y1 ]( M0 q2 ~7 K7 D
Perform the test 10 times or until the magnet under test is detached from the toy, whichever occurs first.& q; q9 w8 C' y& z
5.32 Magnetic flux index
1 F1 |" y, {' y$ m) bSee 4.30.1, 4.31.2 a) and c).5 j' Y$ I$ B2 q+ `* c+ H6 ~  p
5.32.1 Principle
3 |$ k( C4 Z4 C1 M% S" V) r; jThe magnetic flux index is calculated based on the results from measurements of the flux density and the pole- F- l3 `, I+ c& g9 c1 c0 u( o
surface area.+ D& d, r' {3 J
5.32.2 Apparatus" n6 I, K. m. Q
5.32.2.1 Direct current field Gauss meter, capable of determining the field to an accuracy of 5 G.8 N5 o: T& m% h: L( E( e
The meter shall have an axial type probe with. [) C. s# t" v
- an active area diameter of (0,76 ± 0,13) mm* r4 J) J" f  R# Q$ T
- a distance between the active area and probe tip of (0,38 ± 0,13) mm  X$ N9 Y  z4 e" e" S) [
5.32.2.2 Calliper, or similar device with an accuracy of 0,1 mm.
9 G3 ^- m; H6 a. m$ a3 v5.32.3 Procedure# ]8 L$ V3 V$ ~3 x
5.32.3.1 Measurement of flux density: C; E- v  B( T
Identify the surface of the magnet that is the pole.# c& R+ h8 Y; d
Place the tip of the Gauss meter probe in contact with the pole surface of the magnet. For a magnetic/ W. p; ~+ O. W
component (where the magnet is fully or partially imbedded in part of the toy), place the tip of the probe in
( d, ]1 U' K0 vcontact with the surface of the component.( H& x  k: A: W. e
Maintain the probe in a position perpendicular to the surface.% P0 I  k+ s" M% J
Move the probe across the surface to locate the maximum absolute value of the flux density. Record the
" B8 a# R' e( Z2 L8 Emaximum absolute value of the flux density.
7 z  o4 u, K! x+ @% i: c+ INOTE Since the meter can read both negative and positive values, the absolute value is used for calculations.
1 U7 B( c0 E/ i0 I$ x8 H7 `, d5.32.3.2 Measurement and calculation of the pole surface area
4 A3 u& A5 M4 U9 D* RIf the magnet is imbedded/attached as part of a magnetic component, extract the magnet from the component,
4 S% T4 l2 J+ ~0 ?+ |( |1 y2 Heven if it is necessary to break the toy.9 _$ M3 A5 E7 ^; f% B; `; D
If the pole surface of the magnet is flat, measure the dimensions with an accuracy of ± 0,1 mm and calculate& H# y, W" F, e
the area using the appropriate geometric formula.
/ p- J4 }4 ?5 {If the pole is not flat, (for example hemispherical) measure the maximum diameter of the magnet& Q. Y/ ~$ i! D
perpendicular to an axis through the magnetic poles (see Figure XX), with an accuracy of ± 0,1 mm and  v7 Y% M& q  v2 S4 Q; E7 E. o
calculate the area of the corresponding cross section. For multi-pole magnets, measure and calculate the
( {; g9 M, q0 Q9 U4 x' K, Qarea 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.
: d) S$ A; d1 `: O* S! R! b; q; FFigure XX – Maximum diameter of magnet with a non-flat pole
3 h; C; I/ F% q6 TKey
8 y6 F+ B! A3 _( \  O) R  Z1 maximum cross-section perpendicular to the axis
0 N4 B$ Y* C8 y0 u# h5 ~7 p. M2 axis through the magnet poles
5 {; b$ i. j: E, @5.32.4 Calculation of magnetic flux index+ d: g& o- R% n# v$ h3 U
The flux index (kG2mm2) is calculated by multiplying the calculated area of the pole surface (mm2) of the
# U8 p8 o$ J5 N: \magnet by the square of the maximum flux density (kG2).( u) f3 m& d& u3 e
5.33 Cycling
$ d6 l, y9 f7 ?! N* l" c  W4 f) \See 4.32.2 c).4 ?7 s5 [5 e+ r- n0 o) U9 M
Ten cycles as described below, shall be performed on the as-received magnet(s) or magnetic component(s).
9 I; Y, `" I. w0 T6 i3 n& a- XThe magnet or magnetic component shall be brought together to a distance that initiates magnetic attraction,* ~7 M: d# L- M6 {
be released, and then pulled apart to the distance where magnetic attraction ceases. Each attachment and
9 z8 }% |% R7 ^6 P$ M# |: fdetachment shall count as one cycle. If no other magnets or magnetic components are provided with the toy,
$ z4 c$ s8 ^; G3 L( o- \the mating metal part or surface, according to the toy’s intended play pattern, shall be used for cycling
# @6 a- b7 K1 m% S" ~purposes. If no other metal parts or surfaces are provided with the toy, the apparatus described in 5.31.4 shall* E$ E: Y' F0 ?/ e) v
be used for cycling purposes.' {. d1 a, v8 V) x; L" }
5.34 Impact test for magnets
. |5 a4 V  n9 f3 p3 C. lSee 4.32.2 c).( a% q* F: v. j* F: A" x
Place the relevant component of the toy in the most onerous position on a plane horizontal steel surface and
) ?) c" N( d1 @; ?drop a metallic weight with a mass of (1 ± 0,02) kg, distributed over a diameter of (80 ± 2) mm, through a; ~: H+ u  L0 O& |' ~/ P* N4 R
distance of (100 ± 2) mm onto the toy.
- C3 J  I3 _0 C& }Determine whether any liberated magnets or magnetic components fit entirely in the cylinder when tested in9 C+ ]  z' T, e7 T- `- H
accordance with 5.2 (small parts test).
; G7 z7 \! a$ m6 M: o6 S, j. X8 Y5.35 Soaking test for magnets8 q  K0 ]8 C( g$ w7 C6 i
See 4.30.2 b).$ K6 J: B- C' A2 A9 ^7 ?% s7 U
Submerge the toy or toy component completely in a container of demineralised water at a temperature of (20. m9 R6 N$ H( s% `+ Y
± 5) °C for 4 min. Remove the toy, shake off the excess water and keep the toy at room temperature for 10' f2 N+ G1 J5 m8 Y" C1 \
min.& P# ^& ]4 @- a, G  M
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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.8 Q) j* \, U- w" z- I9 g/ ~" l$ M
Immediately after the last cycle, determine whether any liberated magnets or magnetic components fit entirely
( m# u0 f5 \2 a0 X1 w1 min the cylinder when tested in accordance with 5.2 (small parts test).
4 {5 L) L& @" d% G8 |9 IAnnex B Labelling
/ r$ X. k4 [4 w! e( }( Z* V7 l* L, WAdd the following clause:& Z5 ~2 a# `3 J+ V3 C
B.2.21 Magnetic/electrical experimental sets for children over 8 years
6 C& }  v7 b3 Y4 Y, `  w/ Z' _2 dSee 4.30.1 and E.44)
* v9 B$ R% P; H9 H1 h+ l% iThe packaging and the instructions for use of magnetic/electrical experimental sets intended for children 8
$ |! D$ G: S; ~/ i, |years of age or older shall carry a statement comparable or similar to the following.
0 @3 g3 I# Z& o0 O2 V  l! N“WARNING! Not suitable for children under 8 years. This product contains (a) small magnet(s).8 w: t+ @/ _4 a$ S0 s6 N0 Q+ Y3 u
Swallowed magnets can stick together across intestines causing serious infections and death. Seek
  G3 I% ?7 m7 H* A' H$ Timmediate medical attention if magnet(s) are swallowed or inhaled.”
) {' m1 @; L& [" O" d5 k0 i( f9 OAnnex E Rationale
4 Z6 ]7 n6 s7 y' [Add the following clause:
7 k: ^1 ]7 H7 H$ U- D- p2 n2 S( I3 LE.44 Magnets
0 V0 J$ L9 r: M7 WSee 4.30.
! g  |1 f, U6 ]" u7 A7 H/ EThese requirements are intended to address the hazards associated with ingestion of strong magnets (e.g.6 i8 W( M/ n3 C$ o) C
neodymium iron boron type magnets (“NIB”)), that are capable of causing intestinal perforation or blockage.0 |6 T# `5 p) ]
These hazards are additional to those associated with small parts such as suffocation or asphyxiation (see2 x" V) L. w+ W$ Z. d2 e3 p( Q
E.6). These requirements apply regardless of the age of the intended user.; q; Q( w6 d  r- A6 f9 v
Magnets found by children can be ingested. If more than one magnet, or one magnet and a ferromagnetic" q6 L1 j+ h1 v& U* O& w
object (for example an iron or nickel object) is ingested, the objects can attract each other across intestinal9 k. p' Q$ a' N/ z  o$ l; ?% O
walls and cause perforation or blockage, which can cause severe injuries that may be fatal.9 [9 w( s+ y; @( k0 M9 s
Multiple incidents, including at least one fatality, have been reported involving ingestion of magnets resulting6 ?3 X" y' T1 k
in perforation or blockage of the intestines. These incidents have involved children younger and older than 3& o* o4 U# }3 Z* @! f
years of age. Medical signs associated with intestinal perforation or blockage can easily be misinterpreted
5 T: ^+ X" b3 i8 Q* g8 \% O- n- Gsince many children exhibit only flu-like symptoms. Such misinterpretations have caused delays in the medical
- `# V) H" i% S; _, |* Itreatment and led to serious consequences for children.
( a! s% t9 o; R) T: E& f. wFor the purpose of this standard, magnets or magnetic components that could be ingested are identified using: n6 b6 H7 u) T# K- x( _
the small parts cylinder. The small parts cylinder was originally designed to identify small parts in toys9 U2 T2 I* T/ b$ x: N
intended for children under 3 years of age, which are capable of causing suffocation or asphyxiation. It was2 X! X! t8 D* ^9 h* R7 U6 t+ |
not designed for identifying objects that can be ingested by older children. The decision to use the small parts
/ I( O! ]& g; G; d$ b1 [2 icylinder also for assessment of magnets or magnetic components that can be ingested was made for practical
+ b" v% K# Z) D8 A2 zreasons: The cylinder is a well known test template and it provides a safety margin since the magnets and
5 y; @$ h- n0 o7 Pmagnetic components that have been involved in incidents all fit into the cylinder with a large margin. This6 }2 g6 F9 A6 z  P
same principle has been applied in the requirements for expanding materials.
, M8 U' t1 _9 t- r$ H( |The risk of magnets attracting each other across intestinal walls is a function of magnet strength. A limit value
0 n9 X, L2 Q' O; I/ M3 i" p% c8 L( g: Fin the form of a magnetic flux index has been introduced to define what a sufficiently weak magnet is. Analysis
" r! F  p3 ?% \of the data indicates that only the small, powerful NIB type magnets have been involved in the known
3 \1 e# s- h" ?0 @9 V& n( uincidents. Further analysis has determined that magnets with a magnetic flux index less than 50 kG2mm2 (0,5
  T0 }& a3 i3 y8 D9 n0 I7 g/ o) G0 V1 b--`,`,``,,`,```,```,,````,,`,,`-`-`,,`,,`,`,,`---
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