oSIST prEN 1875-3:2021

Rubber- or plastics- coated fabrics - Determination of tear strength - Part 3: Trapezoidal method

This standard defines 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 may 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.

Mit Kautschuk oder Kunststoff beschichtete Textilien - Bestimmung der Weiterreißfestigkeit - Teil 3: Verfahren mit trapezförmigen Probekörpern

Dieses Dokument legt Prüfbedingungen und das anzuwendende Verfahren für die Bestimmung der Reißfestigkeit eines trapezförmigen Probekörpers eines mit Gummi oder Kunststoff beschichteten Materials mithilfe einer Zugprüfmaschine fest. Diese Prüfung kann durchgeführt werden:
— an in Referenzklima konditionierten Probekörpern; oder
— an Probekörpern, die jeder notwendigen Behandlung für die betrachtete Anwendung wie etwa Tauchen unterzogen wurden.

Supports textiles revêtus de caoutchouc ou de plastique - Détermination de la résistance au déchirement - Partie 3: Méthode sur éprouvettes trapézoïdales

Le présent document fixe les conditions d’essai et le mode opératoire à suivre pour déterminer, à l’aide
d’une machine d’essai de traction, la résistance au déchirement d’une éprouvette trapézoïdale de support
textile revêtu de caoutchouc ou de plastique. Cet essai peut être effectué :
 soit sur des éprouvettes conditionnées dans les atmosphères de référence ;
 soit sur des éprouvettes ayant subi tout traitement nécessaire pour l’application envisagée (par
exemple, le trempage).

Gumirane ali plastificirane tekstilije - Ugotavljanje nadaljnje trgalne trdnosti - 3. del: Trapezoidna metoda

General Information

• Status: Not Published
• Public Enquiry End Date: 31-Oct-2021
• ICS: 59.080.40 - Coated fabrics
• Technical Committee: ITEK - Textile and textile products
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 25-Aug-2021
• Due Date: 12-Jan-2022
• Ref Project: prEN 1875-3 - Rubber- or plastics- coated fabrics - Determination of tear strength - Part 3: Trapezoidal method

RELATIONS

• Revised: SIST EN 1875-3:1999 - Rubber- or plastics- coated fabrics - Determination of tear strength - Part 3: Trapezoidal method
• Effective Date: 01-Oct-2021

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 1875-3:2021
01-oktober-2021

Gumirane ali plastificirane tekstilije - Ugotavljanje nadaljnje trgalne trdnosti - 3.

del: Trapezoidna metoda

Rubber- or plastics- coated fabrics - Determination of tear strength - Part 3: Trapezoidal

method
Mit Kautschuk oder Kunststoff beschichtete Textilien - Bestimmung der
Weiterreißfestigkeit - Teil 3: Verfahren mit trapezförmigen Probekörpern

Supports textiles revêtus de caoutchouc ou de plastique - Détermination de la résistance

au déchirement - Partie 3: Méthode sur éprouvettes trapézoïdales
Ta slovenski standard je istoveten z: prEN 1875-3
ICS:
59.080.40 Površinsko prevlečene Coated fabrics
tekstilije
oSIST prEN 1875-3:2021 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 1875-3:2021
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oSIST prEN 1875-3:2021
DRAFT
EUROPEAN STANDARD
prEN 1875-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2021
ICS 59.080.40
English Version
Rubber- or plastics- coated fabrics - Determination of tear
strength - Part 3: Trapezoidal method

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

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 248.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Turkey and

United Kingdom.

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 supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1875-3:2021 E

worldwide for CEN national Members.
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prEN 1875-3:2021 (E)
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

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oSIST prEN 1875-3:2021
prEN 1875-3:2021 (E)
European foreword

This document (prEN 1875-3:2021) has been prepared by Technical Committee CEN/TC 248 “Textiles

and textile products”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1875-3:1997.
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prEN 1875-3:2021 (E)
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: Three

tongue and trousers test pieces;

• EN ISO 4674-2, Rubber- or plastics- coated fabrics- Determination of tear resistance- Part 2: Ballistic

method;

• EN 1875-3, Rubber- or plastics- coated fabrics -Determination of tear resistance- Part 3: Trapezoidal

method.

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.
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oSIST prEN 1875-3:2021
prEN 1875-3:2021 (E)
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
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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
...