Foot and leg protectors - Requirements and test methods for footwear components - Part 4: Non-metallic perforation resistant inserts (ISO 22568-4:2019)

This Standard specifies requirements and test methods for the non-metallic inserts with resistance against mechanical perforation, intended to function as components of PPE footwear (e.g. as described by EN ISO 20345, EN ISO 20346 and EN ISO 20347).

Fuß- und Beinschutz - Anforderungen und Prüfverfahren für Schuhkomponenten - Teil 4: Nichtmetallische perforationsbeständige Einlagen (ISO 22568-4:2019)

Diese Internationale Norm legt Anforderungen und Prüfverfahren für nichtmetallische Einlagen mit Widerstand gegen mechanische Perforation fest, die als Bestandteile von Schuhen der persönlichen Schutzausrüstung vorgesehen sind (wie z. B. in ISO 20345, ISO 20346 und ISO 20347 beschrieben).

Protecteurs du pied et de la jambe - Exigences et méthodes d'essais pour les composants de chaussure - Partie 4: Inserts anti-perforation non métalliques (ISO 22568-4:2019)

Le présent document spécifie les exigences et les méthodes d'essai applicables aux inserts non métalliques offrant une résistance contre les perforations mécaniques et qui sont destinés à être utilisés comme composants de chaussures dans le cadre d'équipements de protection individuelle (par exemple, tel que décrit par l'ISO 20345, l'ISO 20346 et l'ISO 20347).

Ščitniki nog in stopal - Zahteve in preskusne metode za sestavne dele obutve - 4. del: Nekovinski vložki, odporni proti prediranju (ISO 22568-4:2019)

Ta standard določa zahteve in preskusne metode za nekovinske vložke, odporne proti prediranju, ki so sestavni del obutve PPE (npr. kot opisano v standardih EN ISO 20345, EN ISO 20346 in EN ISO 20347).

General Information

Status
Published
Public Enquiry End Date
04-Sep-2017
Publication Date
06-Jun-2019
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
27-May-2019
Due Date
01-Aug-2019
Completion Date
07-Jun-2019

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SLOVENSKI STANDARD
SIST EN ISO 22568-4:2019
01-julij-2019
Nadomešča:
SIST EN 12568:2010

Ščitniki nog in stopal - Zahteve in preskusne metode za sestavne dele obutve - 4.

del: Nekovinski vložki, odporni proti prediranju (ISO 22568-4:2019)

Foot and leg protectors - Requirements and test methods for footwear components - Part

4: Non-metallic perforation resistant inserts (ISO 22568-4:2019)

Fuß- und Beinschutz - Anforderungen und Prüfverfahren für Schuhkomponenten - Teil 4:

Nichtmetallische perforationsbeständige Einlagen (ISO 22568-4:2019)
Protecteurs du pied et de la jambe - Exigences et méthodes d'essais pour les

composants de chaussure - Partie 4: Inserts anti-perforation non métalliques (ISO 22568

-4:2019)
Ta slovenski standard je istoveten z: EN ISO 22568-4:2019
ICS:
13.340.50 Varovanje nog in stopal Leg and foot protection
SIST EN ISO 22568-4:2019 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 22568-4:2019
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SIST EN ISO 22568-4:2019
EN ISO 22568-4
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2019
EUROPÄISCHE NORM
ICS 13.340.50 Supersedes EN 12568:2010
English Version
Foot and leg protectors - Requirements and test methods
for footwear components - Part 4: Non-metallic
perforation resistant inserts (ISO 22568-4:2019)

Protecteurs du pied et de la jambe - Exigences et Fuß- und Beinschutz - Anforderungen und

méthodes d'essais pour les composants de chaussure - Prüfverfahren für Schuhkomponenten - Teil 4:

Partie 4: Inserts anti-perforation non métalliques (ISO Nichtmetallische perforationsbeständige Einlagen (ISO

22568-4:2019) 22568-4:2019)
This European Standard was approved by CEN on 25 February 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22568-4:2019 E

worldwide for CEN national Members.
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SIST EN ISO 22568-4:2019
EN ISO 22568-4:2019 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 22568-4:2019
EN ISO 22568-4:2019 (E)
European foreword

This document (EN ISO 22568-4:2019) has been prepared by Technical Committee ISO/TC 94

"Personal safety -- Personal protective equipment" in collaboration with Technical Committee CEN/TC

161 “Foot and leg protectors” the secretariat of which is held by BSI.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by November 2019, and conflicting national standards

shall be withdrawn at the latest by November 2019.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 12568:2010.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 22568-4:2019 has been approved by CEN as EN ISO 22568-4:2019 without any

modification.
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SIST EN ISO 22568-4:2019
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SIST EN ISO 22568-4:2019
INTERNATIONAL ISO
STANDARD 22568-4
First edition
2019-03
Foot and leg protectors —
Requirements and test methods for
footwear components —
Part 4:
Non-metallic perforation resistant
inserts
Protecteurs du pied et de la jambe — Exigences et méthodes d'essais
pour les composants de chaussure —
Partie 4: Inserts anti-perforation non métalliques
Reference number
ISO 22568-4:2019(E)
ISO 2019
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SIST EN ISO 22568-4:2019
ISO 22568-4:2019(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2019

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2019 – All rights reserved
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SIST EN ISO 22568-4:2019
ISO 22568-4:2019(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Requirements for non-metallic perforation resistant inserts .............................................................................. 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 Resistance to nail perforation .................................................................................................................................................... 2

4.3 Flexing resistance ................................................................................................................................................................................. 2

4.4 Stability against ageing and environmental influence .......................................................................................... 3

4.5 Electrical resistance ............................................................................................................................................................................ 3

5 Test methods for the non-metallic perforation resistant inserts ...................................................................... 3

5.1 Determination of perforation resistance .......................................................................................................................... 3

5.1.1 Method Y: with conical nail ..................................................................................................................................... 3

5.1.2 Method X: with pyramidal nail ............................................................................................................................ 3

5.2 Determination of flexing resistance ...................................................................................................................................... 3

5.2.1 Apparatus ............................................................................................................................................................................... 3

5.2.2 Sampling.................................................................................................................................................................................. 4

5.2.3 Test procedure ................................................................................................................................................................... 5

5.2.4 Results ....................................................................................................................................................................................... 5

5.2.5 Test report ............................................................................................................................................................................. 5

5.3 Test methods for the assessment non-metallic perforation resistant inserts in

critical environment ........................................................................................................................................................................... 6

5.3.1 Sampling.................................................................................................................................................................................. 6

5.3.2 Effect of high temperature ....................................................................................................................................... 6

5.3.3 Effect of acid sweat ........................................................................................................................................................ 6

5.3.4 Effect of alkali sweat ..................................................................................................................................................... 6

5.3.5 Effect of fuel oil .................................................................................................................................................................. 6

5.3.6 Results ....................................................................................................................................................................................... 6

5.3.7 Test report ............................................................................................................................................................................. 6

5.4 Determination of the electrical resistance ...................................................................................................................... 7

5.4.1 Testing procedure ........................................................................................................................................................... 7

5.4.2 Test report ............................................................................................................................................................................. 8

6 Marking .......................................................................................................................................................................................................................... 8

Annex A (normative) Method Y: Perforation resistance with the conical nail ..........................................................9

Annex B (normative) Method X : Perforation resistance with the pyramidal nail ............................................12

Annex C (normative) Procedure for the checking of the nail ...................................................................................................17

Bibliography .............................................................................................................................................................................................................................19

© ISO 2019 – All rights reserved iii
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SIST EN ISO 22568-4:2019
ISO 22568-4:2019(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso

.org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 94, Personal safety — Personal protective

equipment, Subcommittee SC 3, Foot protection.
A list of all parts in the ISO 22568 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2019 – All rights reserved
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SIST EN ISO 22568-4:2019
ISO 22568-4:2019(E)
Introduction

ISO 20345, ISO 20346 and ISO 20347 are related to safety, protective and occupational footwear which

define the performance and required properties of the footwear. On introducing these standards all

national standards relating to perforation resistant inserts were withdrawn leaving the manufacturers

of these items with no means of demonstrating the performance of their products. This document has

been prepared to allow manufacturers to demonstrate the type of the perforation resistant inserts

before being inserted into the footwear.

Non-metallic perforation resistant inserts and materials complying with the requirements of this

document are suitable components of “PPE footwear”.
© ISO 2019 – All rights reserved v
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SIST EN ISO 22568-4:2019
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SIST EN ISO 22568-4:2019
INTERNATIONAL STANDARD ISO 22568-4:2019(E)
Foot and leg protectors — Requirements and test methods
for footwear components —
Part 4:
Non-metallic perforation resistant inserts
1 Scope

This document specifies requirements and test methods for the non-metallic inserts with resistance

against mechanical perforation, intended to function as components of PPE footwear (e.g. as described

by ISO 20345, ISO 20346 and ISO 20347).
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 105-E04: 2013, Textiles — Tests for colour fastness — Part E04: Colour fastness to perspiration

ISO 20344:2011, Personal protective equipment — Test methods for footwear
ISO 20345, Personal protective equipment — Safety footwear
ISO 20346, Personal protective equipment — Protective footwear
ISO 20347, Personal protective equipment — Occupational footwear
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 20345, ISO 20346 and

ISO 20347 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https: //www .iso .org/obp
— IEC Electropedia: available at http: //www .electropedia .org/
3.1
non-metallic perforation resistant insert

non-metallic footwear component placed (or intended to be placed) in the sole complex in order to

provide protection against mechanical perforation
4 Requirements for non-metallic perforation resistant inserts
4.1 General

Depending on the footwear construction, the non-metallic perforation resistant inserts could be in

contact with the wearer foot, therefore the requirements of ISO 20345, ISO 20346 and ISO 20347 should

be taken into account (for example abrasion resistance, water absorption).
© ISO 2019 – All rights reserved 1
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SIST EN ISO 22568-4:2019
ISO 22568-4:2019(E)

Perforation resistant material can be tested in accordance with this document, even in an unshaped

status, if it is intended to be cut and/or shaped by the footwear or sole manufacturer. When shaped

non-metallic perforation resistant inserts are tested in accordance with this document, their suitability

to fit into footwear is not assured, because the dimensional conformity to the footwear depends on the

individual shape of each model of footwear.
Table 1 — Summary of requirements and number of samples
Property Subclause Number of samples Status
Non-metallic material: 1 sample
Resistance to nail perfo-
4.2 mandatory
ration
Ready –shaped inserts: 1 sample
Non-metallic material: 1 sample
Flexing resistance 4.3 mandatory
Ready – shaped inserts: 2 different
sizes
Non-metallic material: 1 sample for
Stability against ageing
each test
and environmental 4.4 mandatory
Ready –shaped inserts: 1 sample for
influence
each test
Electrical resistance 4.5 Non-metallic material: 1 sample optional
NOTE For details, see 4.2 to 4.5.

For each of the required measurements performed in accordance with this standard, a corresponding

estimate of the uncertainty of measurement should be evaluated. One of the following approaches shall

be used:
[2]
— a statistical method, e.g. that given in ISO 5725-2 ;
[4]
— a mathematical method, e.g. that given in ISO/IEC Guide 98-3 ;
[5]
— uncertainty and conformity assessment as given in ISO/IEC Guide 98-4 ;
[6]
— JCGM 100:2008 .
4.2 Resistance to nail perforation

When the non-metallic perforation resistant inserts are tested in accordance with the applicable

methods described in 5.1, they shall meet one of the two types given in Table 2.
Table 2 — Minimum requirements for the perforation force
Types Test method Requirements
Perforation test (see A.4)
Type Y See 5.1.1
the four results reported shall be “pass”
Perforation force (B.4)
Type X See 5.1.2
the average value reported shall be greater or equal to 1 100 N

NOTE This property has two types in term of the protection afforded. This covers the degree of risk

or hazard that a user will face in terms of the type of working places. Type X offers more appropriate

protection from smaller diameter and sharper objects than type Y.
4.3 Flexing resistance

When tested in accordance with the method described in 5.2, the non-metallic perforation resistant

insert shall exhibit no visible signs of cracking, disintegration or delamination after having been

subjected to 1 × 10 (one million) flexion cycles.
2 © ISO 2019 – All rights reserved
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SIST EN ISO 22568-4:2019
ISO 22568-4:2019(E)
4.4 Stability against ageing and environmental influence

When subjected to each single one of the 4 treatments described in 5.3 and tested in accordance

with the method described in 5.1, the non-metallic perforation resistant insert shall conform to the

requirements of 4.2.
4.5 Electrical resistance

This property is optional and frequently requested when the non-metallic perforation resistant inserts

are supposed to be used in an antistatic or conductive footwear (ISO 20345:2011, 6.2.2.1 and 6.2.2.2).

The results of this test, see 5.4, is given as an information, this document does not fix requirements.

5 Test methods for the non-metallic perforation resistant inserts
5.1 Determination of perforation resistance
5.1.1 Method Y: with conical nail
The test method described in Annex A shall be used.
5.1.2 Method X: with pyramidal nail
The test method described in Annex B shall be used.
5.2 Determination of flexing resistance
5.2.1 Apparatus

Flexing apparatus, comprising a suitable flexing guide (e.g. a pair of bars) to move the free end of the

non-metallic perforation resistant insert through a specified distance at a defined rate and a clamping

device consisting of two elastic interlayers approximately 4 mm thick and of Shore A hardness 75 ± 5

with two metal clamping plates at least 130 mm wide.

In the zero position, the guide acts at a distance of (70 ± 1) mm from the clamping plates (see Figure 1).

© ISO 2019 – All rights reserved 3
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SIST EN ISO 22568-4:2019
ISO 22568-4:2019(E)
Dimensions in millimetres
Key
1 flexing guide 3 elastic interlayer
2 clamping plates 4 test piece

Figure 1 — Example of details of a suitable construction of a flexing apparatus for non-metallic

perforation resistant inserts
5.2.2 Sampling
5.2.2.1 Number of test pieces

In case of ready-shaped non-metallic perforation resistant inserts, samples of two different sizes shall

be tested. For unshaped material cut out two suitable test pieces, giving them a shape similar to a

typical insole of approximate size 41 − 42 (Paris Point).
5.2.2.2 Determination of the flexing line

Lay the non-metallic perforation resistant insert with its inner edge against a straight line in such a

way that this line is at a tangent to the insert in the joint and heel regions. At the tangent to the joint

construct a perpendicular. This line is the flexing line at which the insert is clamped (see Figure 2).

4 © ISO 2019 – All rights reserved
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SIST EN ISO 22568-4:2019
ISO 22568-4:2019(E)
Dimensions in millimetres
Key
1 flexing line 3 flexing zone
2 base line 4 line of cut
Figure 2 — Flexing line for non-metallic perforation resistant inserts
5.2.2.3 Preparation of test piece

If necessary, cut off the heel part of the non-metallic perforation resistant insert at a distance of at least

90 mm from the flexing line (see Figure 2 and 5.2.2.2).
5.2.3 Test procedure

Deflect the test piece at a rate of (16 ± 1) Hz by moving the guide bar to a height of 33 mm, measured

vertically above the zero position. Ensure by means of a guide that the test piece returns to the zero

position after every deflection. After 1 × 10 flexes, carry out a visual examination of the test piece.

5.2.4 Results

For ready-shaped non-metallic perforation resistant inserts, the two results for the two different sizes

shall be reported.
In case of unshaped material, the 2 results shall be reported.
5.2.5 Test report
The test report shall include the following information:
a) a reference to this document, i.e. ISO 22568-4:2019;

b) a full description of the samples tested including commercial styles codes, colours, nature, etc.;

c) the results of the visual examination;
d) description of any change of the test piece (for example delamination);
e) any deviation by agreement and otherwise from the present test method.
© ISO 2019 – All rights reserved 5
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SIST EN ISO 22568-4:2019
ISO 22568-4:2019(E)

5.3 Test methods for the assessment non-metallic perforation resistant inserts in

critical environment
5.3.1 Sampling

In case of ready-shaped non-metallic perforation resistant inserts, samples of two different sizes shall

be tested. For unshaped material cut out two suitable test pieces, giving them a shape similar to a

typical insole of approximate size 41 − 42 (Paris Point).
New samples shall be used for each of the following 4 treatments.
5.3.2 Effect of high temperature

Clamp the specimen into the perforation device and place them in an oven with forced air circulation,

which is maintained at (60 ± 2) °C for 4 h ± 10 min; reduce the temperature to (45 ± 2) °C for another

18 h to 20 h. Remove the assembly from the oven and, within 2 min ± 30 s from removing it from the

oven (or from an insulating box which may be used if necessary), start performing the perforation test

in accordance with the method described in 5.1.
5.3.3 Effect of acid sweat

The non-metallic perforation resistant insert shall be totally immersed in an acid sweat solution, as

defined in ISO 105-E04: 2013, 4.4, at (23 ± 2) °C for 24 h ± 15 min. Remove, wash off any excess sweat

with water and store at (23 ± 2) °C for (24 ± 1) h before testing it in accordance with the method

described in 5.1.
5.3.4 Effect of alkali sweat

The non-metallic perforation resistant insert shall be totally immersed in an alkali sweat solution, as

defined in ISO 105-E04: 2013, 4.3, at (23 ± 2) °C for 24 h ± 15 min. Remove, wash off any excess sweat

with water and store at (23 ± 2) °C for (24 ± 1) h before testing it in accordance with the method

described in 5.1.
5.3.5 Effect of fuel oil

Totally immerse the perforation resistant insert in 2,2,4-trimethylpentane (iso-octane) at (23 ± 2) °C

for 24 h ± 15 min. Remove, dry off any excess liquid and store at (23 ± 2) °C for (24 ± 1) h before testing

it in accordance with the method described in 5.1.
5.3.6 Results

For ready-shaped non-metallic perforation resistant inserts, the two results for the 2 different sizes of

the 4 treatments shall be reported.

In case of unshaped material, the two results of the four treatments shall be reported.

5.3.7 Test report
The test report shall include the following information:
a) a reference to this document, i.e. ISO 22568-4:2019;

b) a full description of the samples tested including commercial sizes, styles codes, colours, nature, etc.;

c) the results obtained after the four treatments;

d) description of any change of the test piece (for example delamination, cracking, disintegration);

e) sampling procedure;
6 © ISO 2019 – All rights reserved
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SIST EN ISO 22568-4:2019
ISO 22568-4:2019(E)
f) any deviation by agreement and otherwise from the present test method;
g) date of testing.
5.4 Determination of the electrical resistance
5.4.1 Testing procedure

Place the non-metallic perforation resistant insert in an oven with forced air circulation, which is

maintained at (60 ± 2) °C for at least 24 h. The test shall be done within the next 5 min.

Non-metallic perforation resistant inserts shall be tested according to the method described in

ISO 20344:2011, 5.10.4, with the following variations:
— Test-piece of dimensions (230 × 80) mm;

— Frame of internal dimensions (length 200 ± 5 mm, width 50 ± 2 mm and height minimum 100 mm)

to hold 4 kg of steel balls. The frame is constituted with insulating material (for example wood), see

Figure 3.
Key
1 test-piece of dimensions (230 × 80) mm

2 frame of internal dimensions (length 200 ± 5 mm, width 50 ± 2 mm and height minimum 100 mm)

3 cupper electrode
4 frame containing 4 kg of steel balls
5 apparatus measuring the electrical resistance

Figure 3 — Example of a suitable setting for the determination of the electrical resistance of

non-metallic perforation resistant inser
...

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