Textiles — Seam tensile properties of fabrics and made-up textile articles — Part 2: Determination of maximum force to seam rupture using the grab method

ISO 13935-2:2014 specifies methods for the determination of seam maximum force of sewn seams when the force is applied perpendicularly to the seam. ISO 13935-2:2014 describes the method known as the grab test. The method is mainly applicable to woven textile fabrics, including fabrics which exhibit stretch characteristics imparted by the presence of an elastomeric fibre, mechanical or chemical treatment. It may be applicable to fabrics produced by other techniques. It is not normally applicable to geotextiles, nonwovens, coated fabrics, textile-glass woven fabrics and fabrics made from carbon fibres or polyolefin tape yarns. The sewn fabrics may be obtained from previously sewn articles or may be prepared from fabric samples, as agreed by the parties interested in the results. This method is applicable to straight seams only and not to curved seams. The method is restricted to the use of constant rate of extension (CRE) testing machines.

Textiles — Propriétés de résistance à la traction des coutures d'étoffes et d'articles textiles confectionnés — Partie 2: Détermination de la force maximale avant rupture des coutures par la méthode d'arrachement (Grab test)

L'ISO 13935-2:2014 spécifie une méthode pour la détermination de la force maximale des coutures avec application de la force perpendiculairement à la couture. L'ISO 13935-2:2014 décrit la méthode dite essai d'arrachement. La présente méthode d'essai s'applique essentiellement aux étoffes tissées, y compris les étoffes qui présentent des caractéristiques d'extensibilité induites par la présence de fibres élastomères, par traitement mécanique ou chimiques. Elle peut être appliquée aux étoffes produites par d'autres techniques. Elle ne s'applique normalement pas aux géotextiles, aux non-tissés, aux étoffes revêtues, aux tissus en verre textile et aux étoffes en fibres de carbone ou en fils provenant de lames de polyoléfine. Les étoffes cousues peuvent être obtenues à partir d'articles préalablement cousus ou peuvent être préparées à partir d'échantillons selon accord entre les parties intéressées aux résultats de l'essai. La présente méthode d'essai s'applique aux coutures droites uniquement et non pas aux coutures courbes. La présente méthode permet uniquement l'utilisation d'appareils d'essai à vitesse constante d'allongement.

General Information

Status
Not Published
Current Stage
5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
Start Date
27-Jan-2026
Completion Date
27-Jan-2026

Relations

Effective Date
25-Nov-2023
Effective Date
11-Nov-2023

Overview

ISO/FDIS 13935-2:2025 is an international standard developed by ISO Technical Committee 38, Subcommittee SC 24, focused on textiles. This standard defines the method for determining the maximum force to seam rupture in fabrics and made-up textile articles using the grab method. This method specifically tests sewn seams by applying force perpendicularly and recording the maximum tensile strength at seam rupture.

Primarily applicable to woven textiles, including those with stretch properties from elastomeric fibers or chemical/mechanical treatments, this standard excludes nonwovens, geotextiles, coated fabrics, textile-glass fabrics, carbon fiber fabrics, and polyolefin tape yarn fabrics. The tests are limited to straight seams and require the use of a constant rate of extension (CRE) tensile testing machine.

Key Topics

Scope and Applicability

  • Applies to woven fabrics and made-up textile articles with sewn straight seams
  • Excludes curved seams and nonwoven or coated fabric types
  • Focuses on seam tensile properties by measuring maximum force at seam rupture perpendicular to the seam

Test Method - Grab Test

  • Test specimen grips a fabric specimen with a seam centrally positioned
  • The specimen is stretched until the seam ruptures, recording the maximum applied force
  • Uses tensile testing machines with constant rate of extension (CRE) capabilities
  • Standard specifies jaw dimensions, gauge length, and test speed to ensure consistency

Sampling and Test Preparation

  • Samples should represent fabric and seam types accurately, including structural seams critical for garment integrity
  • Seams may be obtained from previously sewn articles or prepared fabric samples, with careful control of sewing parameters
  • Conditioning in specified atmospheres per ISO 139, with a minimum 24-hour relaxation period before testing

Instrumentation Requirements

  • CRE tensile testing machine with force-measuring accuracy class 1 per ISO 7500-1
  • Jaws designed to prevent slipping or damage, with smooth or, if needed, corrugated gripping surfaces
  • Data acquisition systems must record at least eight force measurements per second for precise rupture force detection

Test Reporting

  • Detailed reporting on test conditions, seam type, specimen preparation, and maximum force results
  • Inclusion of seam configuration and fabric characteristics for reproducibility and comparison

Applications

ISO 13935-2:2025 is essential for textile manufacturers, quality control laboratories, and research institutions aiming to:

  • Evaluate the seam strength of fabric assemblies in garments, upholstery, and technical textiles
  • Ensure the mechanical integrity of sewn seams under stress conditions
  • Compare seam performance across different textile materials and seam constructions
  • Support compliance with product specifications and safety requirements for textile articles
  • Guide the selection of sewing techniques and materials for enhanced durability and consumer safety

This standardized grab test is integral for performance verification in industries such as apparel, automotive textiles, home furnishings, and protective clothing, where seam reliability is critical.

Related Standards

  • ISO 13934-1: Tensile properties of fabrics - Part 1: Determination of maximum force and elongation at maximum force using strip method
  • ISO 13935-1: Textiles - Seam tensile properties - Part 1: Determination of maximum force using the strip method
  • ISO 139: Standard atmospheres for conditioning and testing textiles
  • ISO 7500-1: Calibration and verification of uniaxial testing machines - ensuring machine force accuracy
  • ISO 10012: Requirements for measurement management systems and equipment

These interconnected standards complement ISO 13935-2 by setting environmental conditions, defining machine verification procedures, and providing alternate fabric tensile testing methodologies.


Keywords: ISO 13935-2, seam tensile properties, grab test, woven textiles, seam rupture force, constant rate of extension, textile testing standard, seam strength measurement, textile quality control, tensile testing machine, structural seams, textile seam testing methods.

Draft

ISO/FDIS 13935-2 - Textiles — Seam tensile properties of fabrics and made-up textile articles — Part 2: Determination of maximum force to seam rupture using the grab method Released:13. 01. 2026

English language
13 pages
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Draft

REDLINE ISO/FDIS 13935-2 - Textiles — Seam tensile properties of fabrics and made-up textile articles — Part 2: Determination of maximum force to seam rupture using the grab method Released:13. 01. 2026

English language
13 pages
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Draft

ISO/FDIS 13935-2 - Textiles — Propriétés de résistance à la traction des coutures d'étoffes et d'articles textiles confectionnés — Partie 2: Détermination de la force maximale avant rupture des coutures par la méthode d'arrachement (Grab test) Released:25. 01. 2026

French language
14 pages
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Frequently Asked Questions

ISO/FDIS 13935-2 is a draft published by the International Organization for Standardization (ISO). Its full title is "Textiles — Seam tensile properties of fabrics and made-up textile articles — Part 2: Determination of maximum force to seam rupture using the grab method". This standard covers: ISO 13935-2:2014 specifies methods for the determination of seam maximum force of sewn seams when the force is applied perpendicularly to the seam. ISO 13935-2:2014 describes the method known as the grab test. The method is mainly applicable to woven textile fabrics, including fabrics which exhibit stretch characteristics imparted by the presence of an elastomeric fibre, mechanical or chemical treatment. It may be applicable to fabrics produced by other techniques. It is not normally applicable to geotextiles, nonwovens, coated fabrics, textile-glass woven fabrics and fabrics made from carbon fibres or polyolefin tape yarns. The sewn fabrics may be obtained from previously sewn articles or may be prepared from fabric samples, as agreed by the parties interested in the results. This method is applicable to straight seams only and not to curved seams. The method is restricted to the use of constant rate of extension (CRE) testing machines.

ISO 13935-2:2014 specifies methods for the determination of seam maximum force of sewn seams when the force is applied perpendicularly to the seam. ISO 13935-2:2014 describes the method known as the grab test. The method is mainly applicable to woven textile fabrics, including fabrics which exhibit stretch characteristics imparted by the presence of an elastomeric fibre, mechanical or chemical treatment. It may be applicable to fabrics produced by other techniques. It is not normally applicable to geotextiles, nonwovens, coated fabrics, textile-glass woven fabrics and fabrics made from carbon fibres or polyolefin tape yarns. The sewn fabrics may be obtained from previously sewn articles or may be prepared from fabric samples, as agreed by the parties interested in the results. This method is applicable to straight seams only and not to curved seams. The method is restricted to the use of constant rate of extension (CRE) testing machines.

ISO/FDIS 13935-2 is classified under the following ICS (International Classification for Standards) categories: 59.080.30 - Textile fabrics; 61.020 - Clothes. The ICS classification helps identify the subject area and facilitates finding related standards.

ISO/FDIS 13935-2 has the following relationships with other standards: It is inter standard links to ISO/IEC DIS 23090-9, ISO 13935-2:2014. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

ISO/FDIS 13935-2 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)


FINAL DRAFT
International
Standard
ISO/TC 38/SC 24
Textiles — Seam tensile properties
Secretariat: AFNOR
of fabrics and made-up textile
Voting begins on:
articles —
2026-01-27
Part 2:
Voting terminates on:
2026-03-24
Determination of maximum force
to seam rupture using the grab
method
Textiles — Propriétés de résistance à la traction des coutures
d'étoffes et d'articles textiles confectionnés —
Partie 2: Détermination de la force maximale avant rupture des
coutures par la méthode d'arrachement (Grab test)
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
ISO/TC 38/SC 24
Textiles — Seam tensile properties
Secretariat: AFNOR
of fabrics and made-up textile
Voting begins on:
articles —
Part 2:
Voting terminates on:
Determination of maximum force
to seam rupture using the grab
method
Textiles — Propriétés de résistance à la traction des coutures
d'étoffes et d'articles textiles confectionnés —
Partie 2: Détermination de la force maximale avant rupture des
coutures par la méthode d'arrachement (Grab test)
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Sampling . 2
6 Apparatus . 3
6.1 CRE machine .3
6.2 Equipment for sewing defined seams .4
6.3 Equipment for cutting test specimens.4
7 Atmosphere for conditioning and testing . 4
8 Preparation of seams and of test specimens . 4
8.1 Preparation of seams, if required, before testing .4
8.2 Preparation of adjacent test specimens from one laboratory sample .4
8.3 Preparation of test specimens .5
9 Procedure . 7
9.1 Gauge length .7
9.2 Rate of extension .7
9.3 Mounting of test specimens .7
9.4 Operation .7
10 Calculation and expression of results . 7
11 Test report . 8
Annex A (informative) Arrangements of jaws for the grab test . 9
Annex B (informative) Considerations on straight seams and sampling of structural seams on
garments . 10
Bibliography .13

iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 38, Textiles, Subcommittee SC 24, Conditioning
atmospheres and physical tests for textile fabrics, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 248, Textiles and textile products, in accordance with
the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 13935-2:2014), which has been technically
revised.
The main changes are as follows:
— in Clause 3, a definition of structural seam (3.5) has been added;
— in Clause 5, details on the seam sampling have been added;
— in 6.1.7, a third option c) for the clamps has been added;
— 8.2, a subclause dedicated to preparation of adjacent test specimens has been revised;
— 8.3, a subclause dedicated to preparation of test specimens from garments has been revised;
— a new Annex B related to straight seams and sampling of structural seams on garments has been added.
A list of all parts in the ISO 13935 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
Introduction
This document has been prepared in the context of several test methods for determination of certain
mechanical properties of textiles using mainly tensile testing machines, e.g. tensile properties, seam tensile
properties, tear properties, seam slippage. The procedure for these standards agrees where appropriate. The
results obtained by one of the methods should not be compared with those obtained by the other methods.
See Bibliography [2], [3] and [4].
Where it is intended to compare the seam maximum force values of sewn seams with the fabric maximum
force, it is important to use the same type of test, test conditions and test specimens in the tests in this
[2]
document and ISO 13934-2 .
v
FINAL DRAFT International Standard ISO/FDIS 13935-2:2026(en)
Textiles — Seam tensile properties of fabrics and made-up
textile articles —
Part 2:
Determination of maximum force to seam rupture using the
grab method
1 Scope
This document specifies methods for the determination of seam maximum force of sewn seams when the
force is applied perpendicularly to the seam. It describes the method known as the grab test.
The method defined in this document is applicable to woven textile fabrics, including fabrics which exhibit
stretch characteristics imparted by the presence of an elastomeric fibre, mechanical or chemical treatment.
It can be applicable to fabrics produced by other techniques. It is normally not applicable to geotextiles,
nonwovens, coated fabrics, textile-glass woven fabrics and fabrics made from carbon fibres or polyolefin
, ,
tape yarns.[2] [3] [4]
This method is applicable to straight seams only (obtained from previously sewn articles or prepared from
fabric samples) and not to curved seams (see Annex B for considerations on seams).
The method is restricted to the use of constant-rate-of-extension (CRE) testing machines.
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 139, Textiles — Standard atmospheres for conditioning and testing
ISO 7500-1, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 10012, Measurement management systems — Requirements for measurement processes and measuring
...


2025-10-24
ISO/DISFDIS 13935-2:2025(en)
ISO/TC 38/SC 24
Secretariat: AFNOR
Date: 2026-01-13
Textiles — Seam tensile properties of fabrics and made-up textile
articles —
Part 2:
Determination of maximum force to seam rupture using the grab
method
Textiles — Propriétés de résistance à la traction des coutures d'étoffes et d'articles textiles confectionnés —
Partie 2: Détermination de la force maximale avant rupture des coutures par la méthode d'arrachement (Grab
test)
ThiThiThiThiThiThis drs drs drs drs drs drafafafafafaft is t is t is t is t is t is submitted tsubmitted tsubmitted tsubmitted tsubmitted tsubmitted toooooo a a a a a a p p p p p parallel arallel arallel arallel arallel arallel vovovovovovote in ISOte in ISOte in ISOte in ISOte in ISOte in ISO, CE, CE, CE, CE, CE, CEN.N.N.N.N.N.

FDIS stage
ISO/DISFDIS 13935-2:20252026(en)
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
E-mail: copyright@iso.org
Website: www.iso.org
Published in Switzerland
iii
ISO/DISFDIS 13935-2:20242026(en)
Contents
Foreword . v
Introduction . vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Sampling . 2
6 Apparatus . 3
6.1 CRE machine . 3
6.2 Equipment for sewing defined seams . 4
6.3 Equipment for cutting test specimens . 4
7 Atmosphere for conditioning and testing . 4
8 Preparation of seams and of test specimens . 4
8.1 Preparation of seams, if required, before testing . 4
8.2 Preparation of adjacent test specimens from one laboratory sample . 4
8.3 Preparation of test specimens . 5
9 Procedure . 9
9.1 Gauge length . 9
9.2 Rate of extension . 9
9.3 Mounting of test specimens . 9
9.4 Operation . 9
10 Calculation and expression of results . 9
11 Test report . 10
Annex A (informative) Arrangements of jaws for the grab test . 11
Annex B (informative) Considerations on straight seams and sampling of structural seams on
garments . 14
Bibliography . 18

iv
ISO/DISFDIS 13935-2:20252026(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
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 38, Textiles, Subcommittee SC 24, Conditioning
atmospheres and physical tests for textile fabrics, in collaboration with the European Committee for
Standardization (CEN) Technical Committee CEN/TC 248, Textiles and textile products, in accordance with the
Agreement on technical cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 13935-2:2014), which has been technically
revised.
The main changes are as follows:
— in 3— Clause 3:, a definition of structural seam (Error! Reference source not found.(3.5)) has been
added;
— in 5— Clause 5:, details on the seam sampling have been added;
— — in 6.1.76.1.7, addition of, a third option c) for the clamps has been added;
— 8.2— in 8.2, introduction of a sub-clause, a subclause dedicated to preparation of adjacent test
specimens has been revised;
— 8.3— in 8.3, introduction of a sub-clause, a subclause dedicated to preparation of test specimens
from garments has been revised;
— — Introduction of Annex Ba new Annex B related to straight seams and sampling of structural seams on
garments has been added.
A list of all parts in the ISO 13935 series can be found on the ISO website.
v
ISO/DISFDIS 13935-2:20242026(en)
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.
vi
ISO/DISFDIS 13935-2:20252026(en)
Introduction
This document has been prepared in the context of several test methods for determination of certain
mechanical properties of textiles using mainly tensile testing machines, e.g. tensile properties, seam tensile
properties, tear properties, seam slippage. The procedure for these standards agrees where appropriate. The
results obtained by one of the methods should not be compared with those obtained by the other methods.
See Bibliography [Error! Reference source not found.], [Error! Reference source not found.[2], [3]] and
[Error! Reference source not found.[4] for informative references.].
Where it is intended to compare the seam maximum force values of sewn seams with the fabric maximum
force, it is important to use the same type of test, test conditions and test specimens in the tests in this
[ [2] ]
document and ISO 13934-2 Error! Reference source not found. . .
vii
ISO/DISFDIS 13935-2:20252026(en)
Textiles — Seam tensile properties of fabrics and made-up textile
articles —
Part 2:
Determination of maximum force to seam rupture using the grab
method
1 Scope
This document specifies methods for the determination of seam maximum force of sewn seams when the force
is applied perpendicularly to the seam. This documentIt describes the method known as the grab test.
The method defined in this document is applicable to woven textile fabrics, including fabrics which exhibit
stretch characteristics imparted by the presence of an elastomeric fibre, mechanical or chemical treatment. It
can be applicable to fabrics produced by other techniques. It is normally not applicable to geotextiles,
nonwovens, coated fabrics, textile-glass woven fabrics and fabrics made from carbon fibres or polyolefin tape
, ,
yarns.Error! Reference source not found. Error! Reference source not found. (see Bibliography). Error!
Reference source not found.
This method is applicable to straight seams only (obtained from previously sewn articles or prepared from
fabric samples) and not to curved seams (see Annex BAnnex B for considerations on seams).
The method is restricted to the use of constant-rate-of-extension (CRE) testing machines.
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 139, Textiles — Standard atmospheres for conditioning and testing
ISO 7500--1, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 10012, Measurement management systems — Requirements for measurement processes and measuring
equipment
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— — IEC Electropedia: available at
— — ISO Online browsing platform: available at https://www.iso.org/obp
— 3.1IEC Electropedia: available at https://www.electropedia.org/
ISO/DISFDIS 13935-2:20242026(en)
3.1
constant-rate-of-extension (CRE) testing machine
tensile-testing machine provided with one clamp which is stationary and another clamp which moves with a
constant speed throughout the test, the entire testing system being virtually free from deflection
[ [4] ]
[SOURCE: ISO 13934-1:2013, Error! Reference source not found. , 3.1]
3.2 3.2
grab test
tensile test in which only the centre part of the test specimen is gripped in the jaws of the testing machine
[ [2] ]
[SOURCE: ISO 13934-2:2014, Error! Reference source not found. , 3.2]
3.3 3.3
maximum force to seam rupture
maximum force recorded when a test specimen with a seam perpendicular to the direction of extension is
taken to seam rupture during a tensile test under the specified conditions
[ [3] ]
[SOURCE: ISO 13935-1:2014, Error! Reference source not found. , 3.3]
3.4 3.4
gauge length
distance between the two effective clamping points of a testing device
Note 1 to entry: The effective clamping points (or lines) of jaws can be checked by clamping a test specimen under
defined pretension with carbon copy paper to produce a gripping pattern on the test specimen and/or the jaw faces.
[ [4] ]
[SOURCE: ISO 13934-1:2013, Error! Reference source not found. , 3.3]
3.5 3.5
structural seam
seam that is nec
...


PROJET FINAL
Norme
internationale
ISO/TC 38/SC 24
Textiles — Propriétés de résistance
Secrétariat: AFNOR
à la traction des coutures
Début de vote:
d'étoffes et d'articles textiles
2026-01-27
confectionnés —
Vote clos le:
2026-03-24
Partie 2:
Détermination de la force maximale
avant rupture des coutures par la
méthode d'arrachement (Grab test)
Textiles — Seam tensile properties of fabrics and made-up textile
articles —
Part 2: Determination of maximum force to seam rupture using
the grab method
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
OUTRE LE FAIT D’ÊTRE EXAMINÉS POUR
ÉTABLIR S’ILS SONT ACCEPTABLES À DES FINS
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PROJETS DE NORMES
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NORMES POUVANT
SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
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Numéro de référence
PROJET FINAL
Norme
internationale
ISO/TC 38/SC 24
Textiles — Propriétés de résistance
Secrétariat: AFNOR
à la traction des coutures
Début de vote:
d'étoffes et d'articles textiles
2026-01-27
confectionnés —
Vote clos le:
2026-03-24
Partie 2:
Détermination de la force maximale
avant rupture des coutures par la
méthode d'arrachement (Grab test)
Textiles — Seam tensile properties of fabrics and made-up textile
articles —
Part 2: Determination of maximum force to seam rupture using
the grab method
LES DESTINATAIRES DU PRÉSENT PROJET SONT
INVITÉS À PRÉSENTER, AVEC LEURS OBSERVATIONS,
NOTIFICATION DES DROITS DE PROPRIÉTÉ DONT ILS
AURAIENT ÉVENTUELLEMENT CONNAISSANCE ET À
FOURNIR UNE DOCUMENTATION EXPLICATIVE.
DOCUMENT PROTÉGÉ PAR COPYRIGHT
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© ISO 2026 INDUSTRIELLES, TECHNOLOGIQUES ET COM-MERCIALES,
AINSI QUE DU POINT DE VUE DES UTILISATEURS, LES
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
PROJETS DE NORMES
TRAITEMENT PARALLÈLE ISO/CEN
INTERNATIONALES DOIVENT PARFOIS ÊTRE CONSIDÉRÉS
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NORMES POUVANT
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SERVIR DE RÉFÉRENCE DANS LA RÉGLEMENTATION
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Publié en Suisse Numéro de référence
ii
Sommaire Page
Avant-propos .iv
Introduction .v
1 Domaine d’application . 1
2 Références normatives . 1
3 Termes et définitions . 1
4 Principe. 2
5 Échantillonnage . 2
6 Appareillage . 3
6.1 Appareil à vitesse constante d’allongement .3
6.2 Matériel pour effectuer les coutures spécifiées .4
6.3 Matériel pour le prélèvement des éprouvettes .4
7 Atmosphères de conditionnement et d’essai . 4
8 Préparation des coutures et des éprouvettes . 4
8.1 Préparation des coutures, le cas échéant, avant les essais .4
8.2 Préparation d’éprouvettes adjacentes à partir d’un échantillon pour laboratoire .4
8.3 Préparation des éprouvettes .5
9 Mode opératoire . 7
9.1 Longueur d’essai .7
9.2 Vitesse d’extension . .7
9.3 Mise en place des éprouvettes .7
9.4 Essai .7
10 Calcul et expression des résultats . 7
11 Rapport d’essai . 8
Annexe A (informative) Agencement des mâchoires pour l’essai d’arrachement . 9
Annexe B (informative) Considérations relatives aux coutures droites et échantillonnage des
coutures de structure sur des vêtements . 10
Bibliographie .13

iii
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale d’organismes nationaux
de normalisation (comités membres de l’ISO). L’élaboration des Normes internationales est en général
confiée aux comités techniques de l’ISO. Chaque comité membre intéressé par une étude a le droit de faire
partie du comité technique créé à cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec l’ISO participent également aux travaux. L’ISO collabore étroitement avec
la Commission électrotechnique internationale (IEC) en ce qui concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a
été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir
www.iso.org/directives).
L'ISO attire l'attention sur le fait que la mise en application du présent document peut entraîner l'utilisation
d'un ou de plusieurs brevets. L'ISO ne prend pas position quant à la preuve, à la validité et à l'applicabilité
de tout droit de propriété revendiquée à cet égard. À la date de publication du présent document, l'ISO
n'avait pas reçu notification qu'un ou plusieurs brevets pouvaient être nécessaires à sa mise en application.
Toutefois, il y a lieu d'avertir les responsables de la mise en application du présent document que des
informations plus récentes sont susceptibles de figurer dans la base de données de brevets, disponible à
l'adresse www.iso.org/brevets. L'ISO ne saurait être tenue pour responsable de ne pas avoir identifié tout ou
partie de tels droits de brevet.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données pour
information, par souci de commodité, à l'intention des utilisateurs et ne sauraient constituer un engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion de
l'ISO aux principes de l'Organisation mondiale du commerce (OMC) concernant les obstacles techniques au
commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été élaboré par le comité technique ISO/TC 38, Textiles, sous-comité SC 24,
Atmosphères de conditionnement et essais physiques des étoffes, en collaboration avec le comité technique
CEN/TC 248, Textiles et produits textiles, du Comité européen de normalisation (CEN) conformément à
l’Accord de coopération technique entre l’ISO et le CEN (Accord de Vienne).
Cette troisième édition annule et remplace la deuxième édition (ISO 13935-2:2014), qui a fait l’objet d’une
révision technique.
Les principales modifications sont les suivantes:
— à l’Article 3, ajout de la définition de la couture de structure (3.5);
— à l’Article 5, ajout des détails de prélèvement de coutures;
— en 6.1.7, ajout d’une troisième option pour les mâchoires;
— 8.2, révision d’un paragraphe dédié à la préparation d’éprouvettes adjacentes;
— 8.3, révision d’un paragraphe dédié à la préparation d’éprouvettes issues de vêtements;
— ajout d’une nouvelle Annexe B relative aux coutures droites et aux prélèvements de coutures de structure
sur vêtements.
Une liste de toutes les parties de la série ISO 13935 se trouve sur le site web de l’ISO.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes se
trouve à l’adresse www.iso.org/fr/members.html.

iv
Introduction
Le présent document a été préparé dans le contexte de plusieurs méthodes d’essai pour la détermination de
certaines propriétés mécaniques des textiles utilisant principalement des appareils d’essais de traction, par
exemple les propriétés en traction, propriétés en traction des coutures, propriétés à la déchirure, glissement
des coutures. Les modes opératoires pour ces normes s’accordent là où cela est approprié. Il convient que
les résultats obtenus avec l’une des méthodes ne soient pas comparés avec ceux obtenus avec les autres
méthodes. Voir en Bibliographie [2], [3] et [4].
Lorsque l’objectif est de comparer les valeurs des forces maximales des coutures avec la force maximale
de l’étoffe, il est important d’utiliser le même type d’essai dans les mêmes conditions avec les mêmes
[2]
éprouvettes, dans les essais relatifs au présent document et à l’ISO 13934-2 .

v
PROJET FINAL Norme internationale ISO/FDIS 13935-2:2026(fr)
Textiles — Propriétés de résistance à la traction des coutures
d'étoffes et d'articles textiles confectionnés —
Partie 2:
Détermination de la force maximale avant rupture des
coutures par la méthode d'arrachement (Grab test)
1 Domaine d’application
Le présent document spécifie des méthodes pour la détermination de la force maximale des coutures avec
application de la force perpendiculairement à la couture. Le présent document décrit la méthode dite essai
d’arrachement.
La méthode d’essai définie dans ce document s’applique aux étoffes tissées, y compris les étoffes qui
présentent des caractéristiques d’extensibilité induites par la présence de fibres élastomères, par traitement
mécanique ou chimique. Elle peut être appliquée aux étoffes produites par d’autres techniques. Elle ne
s’applique normalement pas aux géotextiles, aux nontissés, aux support textiles revêtus, aux tissus en verre
[2] [3] [4]
textile et aux étoffes en fibres de carbone ou en fils provenant de lames de polyoléfine , , .
La présente méthode d’essai s’applique aux coutures droites uniquement (obtenues à partir d’articles
préalablement cousus ou préparées à partir d’échantillons d’étoffes) et non pas aux coutures courbes (voir
l’Annexe B pour les considérations sur les coutures).
La présente méthode permet uniquement l’utilisation d’appareils d’essai à vitesse constante d’allongement
(CRE).
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur
contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique. Pour
les références non datées, la dernière édition du document de référence s’applique (y compris les éventuels
amendements).
ISO 139, Textiles — Atmosphères normales de conditionnement et d'essai
ISO 7500-1, Matériaux métalliques — Étalonnage et vérification des machines pour essais statiques uniaxiaux
— Partie 1: Machines d'essai de traction/compression — Étalonnage et vérification du système de mesure de
force
ISO 10012, Systèmes de management de la mesure — Exigences pour les processus et les équipements de mesure
3 Termes et définitions
Pour les besoins du présent document, les termes et définitions suivants s’appliquent.
L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en normalisation,
consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l’adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l’adresse https:// www .electropedia .org/

3.1
appareil d’essai à vitesse constante d’allongement (CRE)
appareil d’essai de tr
...

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