prEN ISO 18636

Rubber or plastic coated fabrics - Mechanical properties - Determination of the elongation under load and the residual deformation (ISO/DIS 18636:2025)

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

Mit Kautschuk oder Kunststoff beschichtete Textilien - Mechanische Eigenschaften - Bestimmung der Dehnung unter Last und der verbleibenden Verformung (ISO/DIS 18636:2025)

Supports textiles revêtus de caoutchouc ou de plastique - Propriétés mécaniques - Détermination de l'allongement sous charge et de la déformation résiduelle (ISO/DIS 18636:2025)

Gumirane ali plastificirane tekstilije - Mehanske lastnosti - Ugotavljanje raztezka pri obremenitvi in rezidualne deformacije (ISO/DIS 18636:2025)

General Information

• Status: Not Published
• Publication Date: 15-Feb-2027
• 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: 4060 - Closure of enquiry - Enquiry
• Start Date: 13-Oct-2025
• Completion Date: 13-Oct-2025
• Ref Project: oSIST prEN ISO 18636:2025 - Rubber or plastic coated fabrics - Mechanical properties - Determination of the elongation under load and the residual deformation (ISO/DIS 18636:2025)

Relations

• Revises: 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

Overview

prEN ISO 18636 (ISO/DIS 18636:2025) specifies a laboratory method for measuring the elongation under load and the residual deformation of rubber- or plastic-coated fabrics. Intended as a harmonized procedure for coated fabrics used in applications such as architectural membranes and upholstery, the standard defines specimen preparation, test apparatus, loading regimes and calculation/reporting rules. Note: this document is a Draft International Standard (DIS) circulated for comment (2025) and is subject to change until published.

Key topics and technical requirements

• Scope: Determination of elongation under load and residual deformation of coated fabrics; optional pre-ageing by heat exposure.
• Test principle: Marked strips are loaded for a specified time, unloaded, allowed to relax and measured to compute elongation and residual deformation.
• Specimens:
  • Three strips (50 mm width) tested in both principal directions (e.g., warp/weft).
  • Mark distances: 200 ± 1 mm (architectural fabrics) or 100 ± 1 mm (upholstery).
  • Strip length: at least 300 mm (architectural) or 200 mm (upholstery), plus clamp allowance.
• Apparatus:
  • Calibrated ruler (0.5 mm) or calliper (0.1 mm).
  • Manual loading device with calibrated masses (automatic devices are avoided).
  • Clamps with steel jaws (~70 ± 6 mm wide) that prevent slippage without cutting.
  • Hot air oven per EN 12280-1 / ISO 1419 for optional heat exposure.
• Testing parameters (examples):
  • Architectural fabrics: load (10.00 ± 0.01) daN, load time 24 h ± 30 min, relaxation 2 h ± 5 min.
  • Upholstery fabrics: load (5.00 ± 0.01) daN, load time 30 ± 3 min, relaxation 30 ± 3 min.
• Calculations:
  • Elongation under load E = (L_loaded − L_initial) / L_initial × 100%
  • Residual deformation R = (L_after_relaxation − L_initial) / L_initial × 100%
• Reporting: Must include reference to the standard, test date, product ID, ageing details (if applied), parameters used, individual and mean results and deviations.

Applications and users

• Who uses it:
  • Manufacturers of rubber- or plastic-coated textiles for quality control and product development.
  • Independent test laboratories verifying mechanical performance.
  • Specifiers and procurement teams in architecture, awnings, upholstery and industrial textiles.
  • Regulatory and conformity assessment bodies when mechanical properties are required in specifications.
• Practical value:
  • Provides comparable, repeatable metrics of stretch and permanent set for coated fabrics.
  • Helps assess serviceability (dimensional stability, sagging, fit) after loading or heat ageing.
  • Informs material selection and design tolerances for membrane structures, furniture coverings, tarpaulins and technical textile products.

Related standards

• ISO 1419:2019 - Accelerated-ageing tests for rubber- or plastics-coated fabrics (referenced for heat exposure).
• ISO 2231 - Standard atmospheres for conditioning and testing of coated fabrics.
• Note: prEN ISO 18636 is processed by ISO/TC 45/SC 4 and may be adopted as a CEN prEN when finalized.

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2025
Gumirane ali plastificirane tekstilije - Mehanske lastnosti - Ugotavljanje raztezka
pri obremenitvi in rezidualne deformacije (ISO/DIS 18636:2025)
Rubber or plastic coated fabrics - Mechanical properties - Determination of the
elongation under load and the residual deformation (ISO/DIS 18636:2025)
Mit Kautschuk oder Kunststoff beschichtete Textilien - Mechanische Eigenschaften -
Bestimmung der Dehnung unter Last und der verbleibenden Verformung (ISO/DIS
18636:2025)
Supports textiles revêtus de caoutchouc ou de plastique - Propriétés mécaniques -
Détermination de l'allongement sous charge et de la déformation résiduelle (ISO/DIS
18636:2025)
Ta slovenski standard je istoveten z: prEN ISO 18636
ICS:
59.080.40 Površinsko prevlečene Coated fabrics
tekstilije
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 18636
ISO/TC 45/SC 4
Rubber or plastic coated fabrics —
Secretariat: DSM
Mechanical properties —
Voting begins on:
Determination of the elongation
2025-07-21
under load and the residual
Voting terminates on:
deformation
2025-10-13
Supports textiles revêtus de caoutchouc ou de plastique —
Propriétés mécaniques — Détermination de l'allongement sous
charge et de la déformation résiduelle
ICS: 59.080.40
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
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.
Reference number
ISO/DIS 18636:2025(en)
DRAFT
ISO/DIS 18636:2025(en)
International
Standard
ISO/DIS 18636
ISO/TC 45/SC 4
Rubber or plastic coated fabrics —
Secretariat: DSM
Mechanical properties —
Voting begins on:
Determination of the elongation
under load and the residual
Voting terminates on:
deformation
Supports textiles revêtus de caoutchouc ou de plastique —
Propriétés mécaniques — Détermination de l'allongement sous
charge et de la déformation résiduelle
ICS: 59.080.40
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: [phone]
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: [e-mail]
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 18636:2025(en)
ii
ISO/DIS 18636:2025(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 (optional) . 3
9 Calculation . 3
10 Test report . 4

iii
ISO/DIS 18636:2025(en)
Foreword
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