ISO/FDIS 13935-2

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)
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FDIS stage
ISO/DISFDIS 13935-2:20252026(en)
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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

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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
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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)
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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.
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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.
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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. . .
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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
...