EN ISO 22751:2020
(Main)Rubber or plastic coated fabrics - Physical and mechanical test - Determination of bending force (ISO 22751:2020)
General Information
- Abstract
This document specifies a test method for the determination of the bending force of rubber or plastics-coated fabrics.
- Status
- Published
- Publication Date
- 22-Sep-2020
- Withdrawal Date
- 30-Mar-2021
- Technical Committee
- CEN/TC 248 - Textiles and textile products
- Drafting Committee
- CEN/TC 248/WG 4 - Coated fabrics
- Current Stage
- 6060 - Definitive text made available (DAV) - Publishing
- Start Date
- 23-Sep-2020
- Completion Date
- 23-Sep-2020
Overview
EN ISO 22751:2020 - Rubber or plastic coated fabrics - Determination of bending force specifies a standardized laboratory method to measure the bending force (flexibility) of rubber- or plastic-coated fabrics. The test uses the bar (two‑point) method: a specimen clamped in a rotating fixture is bent against a vertical metering bar and the force exerted at a specified bending angle is recorded. This standard supports repeatable evaluation of coated-fabric flexibility for quality control, specification and R&D.
Key Topics and Technical Requirements
- Test principle: Bar method / two‑point bending - specimen rotates about a pivot and presses against a vertical bar; force measured at defined angle(s).
- Apparatus:
- Clamping jaws: depth (35 ± 1) mm, minimum width ≥ 30 mm; parallel clamping with controlled pressure.
- Pivot and rotation: pivot axis at front edge of fixed clamp (±0.1 mm); rotation range 1°–91° with max deviation 1.5 %; rotational speed adjustable up to 10°/s (accuracy 0.1°/s).
- Force measurement: load cell capacity up to 10 N (optionally 1 N for very flexible materials) meeting ISO 7500‑1 class 2 accuracy; vertical bar with sharp edge (R = 0.05 mm ± 0.01 mm) and width ≥ 30 mm.
- Adjustable bending length: 0.1 mm to 50 mm (accuracy ≥ 0.1 mm); preliminary contact force adjustable (accuracy at least 1 mN).
- Torque wrench for clamping: range 0.05–0.2 Nm with 0.01 Nm accuracy.
- Sampling and specimen preparation:
- Minimum three specimens cut longitudinally and three perpendicular to manufacture direction; additional sets if testing both faces.
- Mark the side that extends during testing.
- Conditioning and atmosphere:
- Use atmospheres per ISO 2231. Minimum conditioning: 16 h for one‑sided coated fabrics, 24 h for both‑sided.
- Testing atmosphere selected from ISO 2231 atmospheres A–E (commonly 23 °C / 50 % RH in temperate regions).
- Data and reporting:
- Measure bending force at defined angles; report test parameters, raw data and specimen orientation.
Applications - Who Uses This Standard
- Manufacturers of rubber- or plastic-coated fabrics for tarpaulins, inflatable structures, upholstery, protective clothing, industrial covers and technical textiles.
- Independent testing laboratories and quality control departments validating flexibility, conformity and batch consistency.
- Product designers and R&D teams comparing materials or optimizing coatings for bending performance.
- Procurement and certification bodies requiring standardized test evidence in specifications and contracts.
Related Standards
- ISO 2231:1989 - Standard atmospheres for conditioning and testing
- ISO 2286‑3 - Determination of thickness (roll characteristics)
- ISO 7500‑1 - Calibration and verification of force-measuring systems
Keywords: EN ISO 22751:2020, bending force test, rubber coated fabrics, plastic coated fabrics, bar method, coated fabrics testing, flexibility testing, textile testing.
Relations
- Effective Date
- 25-Aug-2026
- Effective Date
- 25-Aug-2026
- Effective Date
- 09-Feb-2026
- Consolidated By
ISO 22751:2020 - Rubber- or plastic-coated fabrics — Physical and mechanical test — Determination of bending force - Effective Date
- 12-Feb-2026
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Frequently Asked Questions
EN ISO 22751:2020 is a standard published by the European Committee for Standardization (CEN). Its full title is "Rubber or plastic coated fabrics - Physical and mechanical test - Determination of bending force (ISO 22751:2020)". This standard covers: This document specifies a test method for the determination of the bending force of rubber or plastics-coated fabrics.
This document specifies a test method for the determination of the bending force of rubber or plastics-coated fabrics.
EN ISO 22751:2020 is classified under the following ICS (International Classification for Standards) categories: 59.080.40 - Coated fabrics. The ICS classification helps identify the subject area and facilitates finding related standards.
EN ISO 22751:2020 has the following relationships with other standards: It is inter standard links to ISO 2286-3:2016, ISO 2231:1989, ISO 7500-1:2018, ISO 22751:2020. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN ISO 22751:2020 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-november-2020
Gumirane ali plastificirane tekstilije - Fizikalni in mehanski preskus - Ugotavljanje
upogibne sile (ISO 22751:2020)
Rubber or plastic coated fabrics - Physical and mechanical test - Determination of
bending force (ISO 22751:2020)
Mit Kautschuk oder Kunststoff beschichtete Textilien - Physikalische und mechanische
Prüfung - Bestimmung der Biegeeigenschaften (ISO 22751:2020)
Supports textiles revêtus de caoutchouc ou de plastique - Essai physique et mécanique -
Détermination de la force de flexion (ISO 22751:2020)
Ta slovenski standard je istoveten z: EN ISO 22751:2020
ICS:
59.080.40 Površinsko prevlečene Coated fabrics
tekstilije
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 22751
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2020
EUROPÄISCHE NORM
ICS 59.080.40
English Version
Rubber or plastic coated fabrics - Physical and mechanical
test - Determination of bending force (ISO 22751:2020)
Supports textiles revêtus de caoutchouc ou de Mit Kautschuk oder Kunststoff beschichtete Textilien -
plastique - Essai physique et mécanique - Physikalische und mechanische Prüfung - Bestimmung
Détermination de la force de flexion (ISO 22751:2020) der Biegeeigenschaften (ISO 22751:2020)
This European Standard was approved by CEN on 22 August 2020.
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, Turkey 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
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 22751:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 22751:2020) has been prepared by Technical Committee ISO/TC 38 "Textiles"
in collaboration with 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 March 2021, and conflicting national standards shall
be withdrawn at the latest by March 2021.
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.
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, 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 the
United Kingdom.
Endorsement notice
The text of ISO 22751:2020 has been approved by CEN as EN ISO 22751:2020 without any modification.
INTERNATIONAL ISO
STANDARD 22751
First edition
2020-08
Rubber- or plastic-coated fabrics —
Physical and mechanical test —
Determination of bending force
Supports textiles revêtus de caoutchouc ou de plastique — Essai
physique et mécanique — Détermination de la force de flexion
Reference number
ISO 22751:2020(E)
©
ISO 2020
ISO 22751:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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below or ISO’s member body in the country of the requester.
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Published in Switzerland
ii © ISO 2020 – All rights reserved
ISO 22751:2020(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
6 Sampling and sample preparation . 4
7 Atmosphere for conditioning and testing . 4
7.1 For conditioning . 4
7.2 For testing . 4
8 Test procedure . 5
8.1 Bending force . 5
8.1.1 General. 5
8.1.2 Specimen coated on both sides . 5
8.1.3 Specimen coated on one side . 5
8.2 Thickness . 5
9 Expression of results . 6
10 Test report . 6
ISO 22751:2020(E)
Foreword
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