EN ISO 18636:2026

• Abstract:

  This document specifies the method for determination of the elongation under load and the residual deformation of coated fabrics.

• Status: Published
• Publication Date: 22-Sep-2026
• ICS: 59.080.40 - Coated fabrics
• 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-2026
• Completion Date: 23-Sep-2026
• Ref Project: SIST EN ISO 18636:2026 - Rubber or plastic coated fabrics - Mechanical properties - Determination of the elongation under load and the residual deformation (ISO 18636:2026)

• Replaces: EN 15977:2011 - Rubber or plastic coated fabrics - Mechanical properties - Determination of the elongation under load and the residual deformation
• Effective Date: 14-Apr-2025
• Consolidated By: ISO 18636:2026 - Rubber or plastic coated fabrics — Mechanical properties — Determination of the elongation under load and the residual deformation
• Effective Date: 12-Feb-2026

EN ISO 18636:2026 is a CEN European Standard that adopts ISO 18636:2026 for rubber or plastic coated fabrics. It specifies a method for determining elongation under load and residual deformation, so laboratories, manufacturers and specifiers can compare coated fabrics under defined mechanical loading.

What does EN ISO 18636:2026 specify?

EN ISO 18636:2026 applies to coated fabrics and focuses on two measurements: how much the fabric stretches while loaded, and how much deformation remains after the load is removed. The document is organized into clauses on principle, apparatus, specimen preparation, the loading test, an optional heat-exposure step, calculation and the test report.

Clause 4 explains the measurement principle. Clauses 5 to 7 set out the equipment, specimen preparation and mechanical loading test. Clause 8 covers the optional heat-exposure procedure, Clause 9 gives the calculation method, and Clause 10 states what the report shall include.

What are the key requirements of EN ISO 18636:2026?

Specimens and equipment

• EN ISO 18636:2026 requires strip specimens cut in both directions of the coated fabric. For woven coated fabrics, the preparation is arranged so the yarn direction remains continuous along the strip. In practice, this lets you compare performance in the two fabric directions instead of relying on one direction only.
• EN ISO 18636:2026 allows a calibrated ruler or a calliper for length measurement, and it requires a manual loading device rather than an automatic one. The clamps must hold the specimen without slipping or damaging it. In practice, the grip and measuring resolution matter because they affect the elongation result directly.

Test conditions and method selection

• EN ISO 18636:2026 requires testing in atmosphere B according to ISO 2231. Table 1 provides three method options for different service situations: high tension in working state, other conditions, and punctual tension in working state. In practice, the user chooses the method that matches how the coated fabric will be used.
• EN ISO 18636:2026 uses Table 1 to set the load, loading duration and relaxation time for each method, and the standard requires both elongation under load and residual deformation to be determined. In practice, the test reports both the temporary stretch and the permanent set, which helps compare materials for service stability.
• EN ISO 18636:2026 also allows an agreed heat-exposure step before mechanical loading. The specimens are aged in a hot air oven according to ISO 1419 and then stabilized before testing. In practice, this optional step checks how heat conditioning affects dimensional stability.

Calculation and reporting

• EN ISO 18636:2026 calculates elongation under load from the specimen length measured before unloading, and residual deformation from the length after the relaxation period. Results are rounded to the nearest tenth of a percent. In practice, the calculation turns the raw length measurements into values that are easy to compare across tests.
• EN ISO 18636:2026 requires the test report to state the standard reference, specimen identification, results, the clause used for calculation, any deviation from the procedure and any unusual features observed. If heat exposure was used, the report shall say so. In practice, that gives a clear record for quality control, specification checks and technical discussions.

Who uses EN ISO 18636:2026?

EN ISO 18636:2026 is used by testing laboratories, coated fabric manufacturers, quality managers, product developers and buyers or specifiers who need a mechanical property check for rubber or plastic coated fabrics. It is especially relevant for products used under sustained load, such as architectural structures and upholstery, because it separates immediate elongation from residual deformation.

What changed in EN ISO 18636:2026 from the previous edition?

EN ISO 18636:2026 supersedes EN 15977:2011.

Which standards are used with EN ISO 18636:2026?

ISO 1419:2019 provides the accelerated-ageing test and the hot air oven method used for the optional heat-exposure step in Clause 8. ISO 2231 provides the standard atmospheres for conditioning and testing, including the atmosphere used for the mechanical loading test in Clause 7.

What does the EN ISO 18636:2026 document contain?

EN ISO 18636:2026 contains the principle of the test, the apparatus requirements, specimen preparation, the mechanical loading test, an optional heat-exposure procedure, the calculation method and the test report requirements. Table 1 sets out the method options and their testing parameters for the different use cases. The document gives a practical laboratory procedure for preparing coated-fabric strips, measuring length change under load and documenting the result.

SLOVENSKI STANDARD
01-november-2026
Gumirane ali plastificirane tekstilije - Mehanske lastnosti - Ugotavljanje raztezka
pri obremenitvi in trajne deformacije (ISO 18636:2026)
Rubber or plastic coated fabrics - Mechanical properties - Determination of the
elongation under load and the residual deformation (ISO 18636:2026)
Mit Kautschuk oder Kunststoff beschichtete Textilien - Mechanische Eigenschaften -
Bestimmung der Dehnung unter Last und der verbleibenden Verformung (ISO
18636:2026)
Supports textiles revêtus de caoutchouc ou de plastique - Propriétés mécaniques -
Détermination de l'allongement sous charge et de la déformation résiduelle (ISO
18636:2026)
Ta slovenski standard je istoveten z: EN ISO 18636:2026
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 18636
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2026
EUROPÄISCHE NORM
ICS 59.080.40 Supersedes EN 15977:2011
English Version
Rubber or plastic coated fabrics - Mechanical properties -
Determination of the elongation under load and the
residual deformation (ISO 18636:2026)
Supports textiles revêtus de caoutchouc ou de Mit Kautschuk oder Kunststoff beschichtete Textilien -
plastique - Propriétés mécaniques - Détermination de Mechanische Eigenschaften - Bestimmung der
l'allongement sous charge et de la déformation Dehnung unter Last und der verbleibenden
résiduelle (ISO 18636:2026) Verformung (ISO 18636:2026)
This European Standard was approved by CEN on 31 August 2026.

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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 18636:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 18636:2026) has been prepared by Technical Committee ISO/TC 45 "Rubber
and rubber products" 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 2027, and conflicting national standards shall
be withdrawn at the latest by March 2027.
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 15977:2011.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 18636:2026 has been approved by CEN as EN ISO 18636:2026 without any modification.

International
Standard
ISO 18636
First edition
Rubber or plastic coated fabrics —
2026-09
Mechanical properties —
Determination of the elongation
under load and the residual
deformation
Supports textiles revêtus de caoutchouc ou de plastique —
Propriétés mécaniques — Détermination de l'allongement sous
charge et de la déformation résiduelle
Reference number
ISO 18636:2026(en) © ISO 2026
ISO 18636:2026(en)
© ISO 2026
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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 18636:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Preparation of test specimens . 2
7 Mechanical loading test . 2
8 Residual deformation after heat exposure and mechanical loading . 3
9 Calculation . 3
10 Test report . 4

iii
ISO 18636:2026(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
...