EN 1875-3:2023

SLOVENSKI STANDARD
01-april-2023
Gumirane ali plastificirane tekstilije - Ugotavljanje nadaljnje trgalne trdnosti - 3.
del: Trapezoidna metoda (izračun petih najvišjih vrednosti)
Rubber- or plastics- coated fabrics - Determination of tear strength - Part 3: Trapezoidal
method (five-highest-peak calculation)
Mit Kautschuk oder Kunststoff beschichtete Textilien - Bestimmung der
Weiterreißfestigkeit - Teil 3: Verfahren mit trapezförmigen Probekörpern (Berechnung der
fünf höchsten Scheitelwerte)
Supports textiles revêtus de caoutchouc ou de plastique - Détermination de la résistance
au déchirement - Partie 3 : Méthode sur éprouvettes trapézoïdales (calcul des cinq pics
les plus hauts)
Ta slovenski standard je istoveten z: EN 1875-3:2023
ICS:
59.080.40 Površinsko prevlečene Coated fabrics
tekstilije
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 1875-3
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 59.080.40 Supersedes EN 1875-3:1997
English Version
Rubber- or plastics-coated fabrics - Determination of tear
strength - Part 3: Trapezoidal method (five-highest-peak
calculation)
Supports textiles revêtus de caoutchouc ou de Mit Kautschuk oder Kunststoff beschichtete Textilien -
plastique - Détermination de la résistance au Bestimmung der Weiterreißfestigkeit - Teil 3:
déchirement - Partie 3 : Méthode sur éprouvettes Verfahren mit trapezförmigen Probekörpern
trapézoïdales (calcul des cinq pics les plus hauts) (Berechnung der fünf höchsten Scheitelwerte)
This European Standard was approved by CEN on 25 December 2022.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1875-3:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Principle . 6
5 Apparatus . 6
5.1 Constant rate of extension (CRE) . 6
5.2 Clamping system . 6
6 Test specimens . 6
6.1 Atmosphere for conditioning and testing . 6
6.2 Sampling . 6
6.3 Selection and preparation of test pieces . 7
7 Procedure. 7
8 Calculation and expression of results . 7
9 Test report . 8
Annex A (informative) Tear strength -Trapezoidal method- Note on the choice of test
sample dimensions . 10
Bibliography . 13

European foreword
This document (EN 1875-3:2023) has been prepared by Technical Committee CEN/TC 248 “Textiles and
textile products”, 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 August 2023, and conflicting national standards shall be
withdrawn at the latest by August 2023.
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 1875-3:1997.
In comparison with the previous edition, the main technical changes are as follows:
— in the title: addition of the mention of the five-highest-peak calculation;
— in Clause 2: substitution of EN 22286 (and correction) by EN ISO 2286-1 and EN ISO 2286-3;
— in Clause 3: addition of term and definition of “tear force” (3.4);
— in Clause 5: addition of clamping system; specification of the minimum width of the jaws (5.2);
— in 6.1: clarification of atmosphere for conditioning and testing; specification of the duration of
conditioning for textiles coated on one and both sides;
— gathering of former 6.3, 6.4 and 6.5 to one sub-clause (new 6.3) called “Selection and preparation of
test pieces”;
— in 6.5, supplement description of the preparation on coated woven substrates;
— in Clause 7: addition of further requirements (for example, no slippage, tear propagation) on testing;
— in Clause 8: the calculation (expression of results) has been changed to be based on the entire trace;
— addition of Figure A.1 – test specimen.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United
Kingdom.
Introduction
Tearing is amongst the more usual ways of destruction for many thin and flexible materials. Knowledge
of the resistance of these materials to this type of behaviour is therefore very important. In practice,
tearing can result from very different circumstances: hence the large number of test methods that have
been developed in order to predict the behaviour of the materials in various situations.
This document forms part of a European Standard on tear resistance of coated fabrics as follows
• EN ISO 4674-1, Rubber- or plastics-coated fabrics - Determination of tear resistance - Part 1: Constant
rate of tear methods (ISO 4674-1);
• EN ISO 4674-2, Rubber- or plastics-coated fabrics - Determination of tear resistance- Part 2: Ballistic
pendulum method (ISO 4674-2);
• EN 1875-3, Rubber- or plastics-coated fabrics - Determination of tear strength - Part 3: Trapezoidal
method (five-highest-peak calculation).
The first part describes two methods using a tensile testing machine at a constant rate of elongation. The
second part describes a dynamic method using the kinetic energy of a falling pendulum. For these two
parts, tearing propagates in a direction parallel to the applied force. The third part uses a trapezoidal test
piece, where tearing propagates in a direction perpendicular to the applied force.
Trapezoidal method should logically be classified with the constant speed methods but is generally
considered apart owing to the direction of propagation.
Attention is drawn to the fact that the results of the different methods cannot be compared, owing to the
differences of principle.
1 Scope
This document specifies test conditions and the procedure to be followed for determining the tear
strength of a trapezoidal specimen of a rubber- or plastics-coated fabric, using a tensile testing machine.
This test can be carried out:
• either on test specimens conditioned in reference atmospheres; or
• on test specimens which have been subjected to any necessary treatment for the application
considered, for example dipping.
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.
EN ISO 1421, Rubber- or plastics-coated fabrics - Determination of tensile strength and elongation at break
(ISO 1421)
EN ISO 2231, Rubber- or plastics-coated fabrics - Standard atmospheres for conditioning and testing
(ISO 2231)
EN ISO 2286-1, Rubber- or plastics-coated fabrics - Determination of roll characteristics - Part 1: Methods
for determination of length, width and net mass (ISO 2286-1)
EN 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 7500-1)
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:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
tearing
tearing action
3.2
tear
result of tearing
3.3
tear strength
property of a coated fabric to resist a force tending to separate the threads or fibres making up the coated
fabric before tearing, by breaking some of these threads or fibres
3.4
tear force
force required to propagate a tear initiated under the specified conditions
3.5
peak value
point in the tearing force-displacement diagram at which the slope of the curve relative to the recorded
force values is switching from positive to negative
Note 1 to entry: The peak value for calculation is defined by a load drop of minimum 10 % related to the previous
increase in load.
3.6
tear crack length
measured crack length which from the beginning until the end of its action is induced by a tearing force
4 Principle
The threads or fibres forming a coated fabric are subjected successively to a force designed to break them.
The values of the breaking forces are recorded as the mobile jaw moves.
5 Apparatus
5.1 Constant rate of extension (CRE)
Tensile testing machine shall be in compliance with the apparatus described in EN ISO 1421. The tear
forces shall be recorded by a measurement instrument (autographic recorder). In the case of computer-
-1
aided recording of force and extension, the frequency of data collection shall be not less than 8 s . Under
conditions of use, the accuracy of the apparatus shall be of class 1 in accordance with EN ISO 7500-1. The
error of the indicated or recorded maximum force at any point in the range in which the machine is used
shall not exceed ± 1 %, and the error of the indicated or recorded jaw separation shall not exceed 1 mm.
After the first 2 s of the test, the rate of increase in the distance between the clamps shall be uniform to
within 5 %.
5.2 Clamping system
The width of each jaw shall be not less than the width of the portion of the test piece to be clamped,
i.e. ≥ 75 mm.
6 Test specimens
6.1 Atmosphere for conditioning and testing
Unless otherwise specified, the samples shall be conditioned in climate B at (23 ± 2) °C and (50 ± 5) %
relative humidity as defined in EN ISO 2231. The test shall be carried out in the same atmosphere. For
textiles which are coated on one side, an exposition of minimum 16 h is recommended.
For textiles which are coated on both sides, an exposition of minimum 24 h is re
...