EN ISO 5402-1:2017

SLOVENSKI STANDARD
01-maj-2017
1DGRPHãþD
SIST EN ISO 5402-1:2012
Usnje - Ugotavljanje odpornosti proti upogibanju - 1. del: Metoda fleksimetra (ISO
5402-1:2017)
Leather - Determination of flex resistance - Part 1: Flexometer method (ISO 5402-
1:2017)
Leder - Bestimmung der Dauerbiegefestigkeit - Teil 1: Flexometer-Verfahren (ISO 5402-
1:2017)
Cuir - Détermination de la résistance à la flexion - Partie 1 : Méthode au flexomètre (ISO
5402-1:2017)
Ta slovenski standard je istoveten z: EN ISO 5402-1:2017
ICS:
59.140.30 Usnje in krzno Leather and furs
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 5402-1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2017
EUROPÄISCHE NORM
ICS 59.140.30 Supersedes EN ISO 5402-1:2011
English Version
Leather - Determination of flex resistance - Part 1:
Flexometer method (ISO 5402-1:2017)
Cuir - Détermination de la résistance à la flexion - Leder - Bestimmung der Dauerbiegefestigkeit - Teil 1:
Partie 1: Méthode au flexomètre (ISO 5402-1:2017) Flexometer-Verfahren (ISO 5402-1:2017)
This European Standard was approved by CEN on 21 December 2016.

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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5402-1:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 5402-1:2017) has been prepared by Technical Committee IULTCS
"International Union of Leather Technologists and Chemists Societies" in collaboration with Technical
Committee CEN/TC 289 “Leather” the secretariat of which is held by UNI.
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 August 2017 and conflicting national standards shall
be withdrawn at the latest by August 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 5402-1:2011.
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 5402-1:2017 has been approved by CEN as EN ISO 5402-1:2017 without any
modification.
INTERNATIONAL ISO
STANDARD 5402-1
IULTCS/IUP 20
Second edition
2017-02
Leather — Determination of flex
resistance —
Part 1:
Flexometer method
Cuir — Détermination de la résistance à la flexion —
Partie 1: Méthode au flexomètre
Reference numbers
ISO 5402-1:2017(E)
IULTCS/IUP 20:2017(E)
©
ISO 2017
ISO 5402-1:2017(E)
IULTCS/IUP 20:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, 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
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CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

ISO 5402-1:2017(E)
IULTCS/IUP 20:2017(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3  Terms and definitions . 1
4  Principle . 1
5  Apparatus and reagents . 1
6  Sampling and sample preparation . 3
7  Procedure. 3
8 Test report . 5
Annex A (informative) Sources of apparatus . 7
ISO 5402-1:2017(E)
IULTCS/IUP 20:2017(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 on 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 the following URL: www . i so .org/ iso/ foreword .html.
ISO 5402-1 was prepared by the Physical Test Commission of the International Union of Leather
Technologists and Chemists Societies (IUP Commission, IULTCS) in collaboration with the European
Committee for Standardization (CEN) Technical Committee CEN/TC 289, Leather, the secretariat of
which is held by UNI, in accordance with the Agreement on technical cooperation between ISO and CEN
(Vienna Agreement).
IULTCS, originally formed in 1897, is a world-wide organization of professional leather societies to
further the advancement of leather science and technology. IULTCS has three Commissions, which
are responsible for establishing international methods for the sampling and testing of leather. ISO
recognizes IULTCS as an international standardizing body for the preparation of test methods for
leather.
This second edition cancels and replaces the first edition (ISO 5402-1:2011), which has been technically
revised.
Subclauses 5.1, 5.1.1, 5.1.2, 7.2 to 7.6 have been technically revised.
A list of all parts in the ISO 5402 series can be found on the ISO website.
iv © ISO 2017 – All rights reserved

ISO 5402-1:2017(E)
INTERNATIONAL STANDARD
IULTCS/IUP 20:2017(E)
Leather — Determination of flex resistance —
Part 1:
Flexometer method
1 Scope
This document specifies a method for determining the wet or dry flex resistance of leather and finishes
applied to leather. It is applicable to all types of flexible leather below 3,0 mm in thickness.
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 2418, Leather — Chemical, physical and mechanical and fastness tests — Sampling location
ISO 2419, Leather — Physical and mechanical tests — Sample preparation and conditioning
ISO 3696, Water for analytical laboratory use — Specification and test methods
3  Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
4  Principle
A test piece is folded with the surface to be tested inwards and clamped in an upper movable clamp and
with the surface to be tested outwards in a lower fixed clamp. Movement of the upper clamp causes a
fold in the test piece to run along it. The test piece is examined periodically for damage.
5  Apparatus and reagents
5.1 Test machine, consisting of a movable upper clamp, a fixed lower clamp and a counter as described
in 5.1.1 to 5.1.3 and as shown in Figure 1 and Figure 2.
5.1.1  Upper clamp, consisting of a pivoting pair of flat plates of 4 mm thickness as shown in Figure 1.
The small plate (H) has the basic shape of a trapezium but with a radius of 2 mm at the acute corner. It
has a ledge (G) to support the folded test piece. The larger plate (I) has a shape as shown in Figure 1.
The clamp tightening screw (F) tightens the plates together and also acts as a stop to prevent the test
piece from being incorrectly positioned. The design of the clamp should ensure that the two faces of the
clamp remain parallel when clamping the test piece. The upper clamp is reciprocated by a motor about a
horizontal axle, descending through an angle (A) of (22,5 ± 0,5)° at a frequency of (100 ± 5) cycles/min.
ISO 5402-1:2017(E)
IULTCS/IUP 20:2017(E)
5.1.2  Lower clamp, fixed and lying directly beneath (planar to) the upper clamp and consisting of a
pair of flat plates (B and C) to hold the test piece.
The position of the lower clamp is such that the vertical distance (D) between the upper side of the
ledge (G) of the upper clamp and the upper edge of the fixed lower clamp, when the upper clamp is
horizontal, is (25,0 ± 0,5) mm.
5.1.3 Counter, to indicate the number of cycles.
Dimensions in millimetres
Key
A flexing angle (22,5 ± 0,5)°
B fixed part of fixed lower clamp
C movable part of fixed lower clamp
D vertical positioning of fixed part of movable upper clamp and fixed part of fixed lower clamp
E horizontal axle (pivot point)
F clamp tightening screws
G ledge (for testing of thick test pieces, the ledge can be increased to more than 8 mm)
H small part of upper clamp with ledge (G)
I large part of upper clamp
Figure 1 — U
...