SIST EN ISO 5402-2:2015
(Main)Leather - Determination of flex resistance - Part 2: Vamp flex method (ISO 5402-2:2015)
Leather - Determination of flex resistance - Part 2: Vamp flex method (ISO 5402-2:2015)
ISO 5402-2:2015 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 leather below 3,0 mm in thickness.
Leder - Bestimmung der Dauerbiegefestigkeit - Teil 2: Blattbiege-Verfahren (ISO 5402-2:2015)
Cuir - Détermination de la résistance à la flexion - Partie 2: Méthode de flexion d'empeigne (ISO 5402-2:2015)
L'ISO 5402-2 :2015 spécifie une méthode pour déterminer la résistance à la flexion d'un cuir à l'état sec ou à l'état humide et des finitions appliquées au cuir. Elle s'applique à tous les types de cuirs dont l'épaisseur est inférieure à 3,0 mm.
Usnje - Ugotavljanje odpornosti proti upogibanju - 2. del: Metoda upogibanja gornjega usnja (ISO 5402-2:2015)
Ta del standarda ISO 5402 določa metodo za ugotavljanje odpornosti proti upogibanju mokrega ali suhega usnja in končnih premazov, ki se nanesejo na usnje. Uporablja se za vse vrste usnja, ki je tanjše od 3,0 mm.
General Information
- Status
- Published
- Public Enquiry End Date
- 09-Aug-2015
- Publication Date
- 09-Nov-2015
- Technical Committee
- IUSN - Leather
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 04-Nov-2015
- Due Date
- 09-Jan-2016
- Completion Date
- 10-Nov-2015
Relations
- Effective Date
- 01-Dec-2015
Overview
EN ISO 5402-2:2015 - Leather: Determination of flex resistance, Part 2 (Vamp flex method) specifies a laboratory method to assess the wet or dry flex resistance of leather and surface finishes. Applicable to all leathers below 3.0 mm thickness, this standard defines the vamp‑flex test used widely in footwear and leather goods quality assessment to evaluate durability where repeated bending occurs.
Key topics and technical requirements
- Test principle: A test piece is folded over two inverted “V” clamps and flexed by reciprocating the clamps to produce a central downward crease and surrounding upward creases; damage is inspected periodically.
- Apparatus essentials:
- Two inverted “V” clamps aligned on one axis with minimum separation (9.5 ± 1.0) mm.
- Clamp geometry: internal angle (40 ± 1)°, truncated tip radius (6.4 ± 0.5) mm.
- Oscillating motion between 9.5 mm and 19.0 ± 1.5 mm at (300 ± 30) cycles/min; counter to record cycles.
- Press knife (square inner wall 64 ± 1 mm), magnifier (4–6×), and distilled/deionized water (ISO 3696 grade 3) for wet tests.
- Sampling & preparation:
- Cut test pieces parallel and perpendicular to the backbone per ISO 2418 and condition per ISO 2419.
- Wet tests: rub ~1 ml distilled/deionized water into the flesh surface and re‑wet every 25,000 cycles.
- Test procedure & cycle options:
- Ensure correct folding, run to specified cycle counts. Typical inspection points:
- Dry flex: 50,000; 100,000; 250,000; 500,000; 1,000,000 cycles.
- Wet flex: 50,000; 100,000 cycles (inspect and re‑wet every 25,000 cycles).
- Ensure correct folding, run to specified cycle counts. Typical inspection points:
- Damage assessment: look for creasing, cracking (inward/outward folds), delamination/flaking, edge cracking and spue (wet tests). Test report must record test conditions, number of cycles, damage at inspections and deviations.
Applications and users
Practical uses and beneficiaries of EN ISO 5402-2:2015:
- Footwear manufacturers and component suppliers - assessing vamp (upper) durability and specifying leather for shoes.
- Leather tanneries and finishers - R&D and quality control of finished leathers and coatings.
- Independent testing laboratories - conformity testing, comparative performance data.
- Product designers, QA managers and standards compliance teams - material selection and failure analysis for bent or flexing applications (uppers, straps, gloves).
Related standards
- ISO 5402-1 (Flexometer method) - complementary flex testing technique.
- ISO 2418 - sampling location for leather tests.
- ISO 2419 - sample preparation and conditioning.
- ISO 3696 - laboratory water quality for wet testing.
EN ISO 5402-2:2015 (Vamp flex method) provides a repeatable, industry‑accepted procedure for measuring flex resistance of thin leathers - key for predicting in‑use durability and ensuring product quality.
Frequently Asked Questions
SIST EN ISO 5402-2:2015 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Leather - Determination of flex resistance - Part 2: Vamp flex method (ISO 5402-2:2015)". This standard covers: ISO 5402-2:2015 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 leather below 3,0 mm in thickness.
ISO 5402-2:2015 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 leather below 3,0 mm in thickness.
SIST EN ISO 5402-2:2015 is classified under the following ICS (International Classification for Standards) categories: 59.140.30 - Leather and furs. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 5402-2:2015 has the following relationships with other standards: It is inter standard links to SIST EN ISO 22288:2009. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN ISO 5402-2:2015 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2015
1DGRPHãþD
SIST EN ISO 22288:2009
Usnje - Ugotavljanje odpornosti proti upogibanju - 2. del: Metoda upogibanja
gornjega usnja (ISO 5402-2:2015)
Leather - Determination of flex resistance - Part 2: Vamp flex method (ISO 5402-2:2015)
Leder - Bestimmung der Dauerbiegefestigkeit - Teil 2: Blattbiege-Verfahren (ISO 5402-
2:2015)
Cuir - Détermination de la résistance à la flexion - Partie 2: Méthode de flexion
d'empeigne (ISO 5402-2:2015)
Ta slovenski standard je istoveten z: EN ISO 5402-2:2015
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 5402-2
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2015
EUROPÄISCHE NORM
ICS 59.140.30 Supersedes EN ISO 22288:2009
English Version
Leather - Determination of flex resistance - Part 2: Vamp
flex method (ISO 5402-2:2015)
Cuir - Détermination de la résistance à la flexion - Leder - Bestimmung der Dauerbiegefestigkeit - Teil 2:
Partie 2: Méthode de flexion d'empeigne (ISO 5402- Blattbiege-Verfahren (ISO 5402-2:2015)
2:2015)
This European Standard was approved by CEN on 8 August 2015.
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, 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
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 5402-2:2015 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 5402-2:2015) has been prepared by Technical Committee CEN/TC 289
“Leather”, the secretariat of which is held by UNI, in collaboration with IULTCS "International Union of
Leather Technologists and Chemists Societies".
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 April 2016, and conflicting national standards shall be
withdrawn at the latest by April 2016.
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 22288:2009.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 5402-2:2015 has been approved by CEN as EN ISO 5402-2:2015 without any
modification.
INTERNATIONAL ISO
STANDARD 5402-2
IULTCS/IUP 39-2
First edition
2015-09-15
Leather — Determination of flex
resistance —
Part 2:
Vamp flex method
Cuir — Détermination de la résistance à la flexion —
Partie 2: Méthode de flexion d’empeigne
Reference numbers
ISO 5402-2:2015(E)
IULTCS/IUP 39-2:2015(E)
©
ISO 2015
ISO 5402-2:2015(E)
IULTCS/IUP 39-2:2015(E)
© ISO 2015, 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.
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ii © ISO 2015 – All rights reserved
ISO 5402-2:2015(E)
IULTCS/IUP 39-2:2015(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Apparatus . 1
5 Sampling and sample preparation . 4
6 Procedure. 4
7 Test report . 5
Annex A (informative) Sources of apparatus . 6
ISO 5402-2:2015(E)
IULTCS/IUP 39-2:2015(E)
Foreword
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