ISO/FDIS 18636

Rubber or plastic coated fabrics — Mechanical properties — Determination of the elongation under load and the residual deformation

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

Supports textiles revêtus de caoutchouc ou de plastique — Propriétés mécaniques — Détermination de l'allongement sous charge et de la déformation résiduelle

General Information

• Status: Not Published
• ICS: 59.080.40 - Coated fabrics
• Technical Committee: ISO/TC 45/SC 4 - Products (other than hoses)
• Drafting Committee: ISO/TC 45/SC 4 - Products (other than hoses)
• Current Stage: 5020 - FDIS ballot initiated: 2 months. Proof sent to secretariat
• Start Date: 04-Jun-2026
• Completion Date: 04-Jun-2026

Relations

• Consolidates: FprEN ISO 18636 - Rubber or plastic coated fabrics - Mechanical properties - Determination of the elongation under load and the residual deformation (ISO/FDIS 18636:2026)
• Effective Date: 12-Feb-2026
• Consolidates: ISO/ASTM 52908:2023 - Additive manufacturing of metals — Finished part properties — Post-processing, inspection and testing of parts produced by powder bed fusion
• Effective Date: 19-Apr-2025

Overview

ISO/FDIS 18636: Rubber or plastic coated fabrics - Mechanical properties - Determination of the elongation under load and the residual deformation is an international standard developed by ISO Technical Committee 45, Subcommittee 4. This standard specifies a method for determining two key mechanical properties of coated fabrics: the elongation under load and the resulting residual deformation. Coated fabrics, whether rubber or plastic, are widely used in technical textiles, industrial products, architecture, and consumer goods. Understanding their mechanical performance is critical for ensuring durability, functionality, and safety in their applications.

The standardized test method described in ISO/FDIS 18636 provides reliable, repeatable assessment criteria that are essential for product development, quality control, and compliance with regulatory or contractual requirements.

Key Topics

• Elongation Under Load

  • The test measures how much a coated fabric stretches when subjected to a specified load for a set period.
  • Elongation is expressed as a percentage relative to the original length, allowing for comparison across different materials.

• Residual Deformation

  • After removing the load and allowing the specimen to relax, the permanent deformation (if any) is measured.
  • This property indicates the extent to which the coated fabric may permanently change shape after being stressed.

• Testing Apparatus and Conditions

  • Utilizes calibrated measuring tools and manual loading devices to assure accuracy.
  • Clamps must securely hold specimens without causing damage or slippage.

• Specimen Preparation

  • Standardized cutting and marking procedures ensure consistency.
  • Testing is performed in both principle directions (e.g., warp and weft for woven fabrics).

• Optional Heat Exposure

  • Samples may be exposed to a defined heat treatment per ISO 1419 before testing, simulating aging or service conditions.

• Calculation and Reporting

  • Results are systematically calculated and must be reported with all relevant test parameters and any deviations from standard procedures.

Applications

The procedures defined in ISO/FDIS 18636 are applicable across a wide range of industries where coated fabrics are used:

• Architectural Structures: Ensuring that coated fabrics used in tensile membranes or roofing systems maintain their shape and strength under load.
• Industrial Textiles: Evaluating material durability for conveyor belts, protective coverings, or tank linings that experience mechanical stress.
• Transport and Automotive: Assessing seat coverings, tarpaulins, and airbag materials for performance under dynamic or static loading.
• Consumer Goods: Quality control for coated fabrics in luggage, sports equipment, and outdoor gear, ensuring product longevity and safety.
• Furniture and Upholstery: Testing resistance to permanent deformation after prolonged use or weight application.

By adhering to ISO/FDIS 18636, manufacturers, testing laboratories, and buyers can ensure consistency in product quality and performance, reduce the risk of material failure, and support regulatory compliance and international trade.

Related Standards

To ensure comprehensive testing and material evaluation, ISO/FDIS 18636 references and complements several other international standards, including:

• ISO 1419:2019 - Rubber or plastics coated fabrics - Accelerated-ageing tests
• ISO 2231 - Rubber- or plastics-coated fabrics - Standard atmospheres for conditioning and testing

These related standards cover conditioning, environmental exposure, and aging procedures that can influence mechanical testing outcomes. Utilizing these standards together enables a thorough, evidence-based approach to coated fabric performance assessment.

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Keywords: ISO/FDIS 18636, coated fabrics, mechanical properties, elongation under load, residual deformation, rubber coated fabric, plastic coated fabric, textiles, quality control, ISO standards, fabric testing methods, industrial textiles, test method, durability, conformity, compliance.

Standards Content (Sample)

FINAL DRAFT
International
Standard
ISO/TC 45/SC 4
Rubber or plastic coated fabrics —
Secretariat: DSM
Mechanical properties —
Voting begins on:
Determination of the elongation
2026-06-04
under load and the residual
Voting terminates on:
deformation
2026-07-30
Supports textiles revêtus de caoutchouc ou de plastique —
Propriétés mécaniques — Détermination de l'allongement sous
charge et de la déformation résiduelle
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 SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
FINAL DRAFT
International
Standard
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
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 SUPPOR TING DOCUMENTATION.
© ISO 2026
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/CEN PARALLEL PROCESSING
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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 Reference number
ii
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
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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee
SC 4, Products (other than hoses), in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 248, Textiles and textile products, in accordance with the Agreement on
technical cooperation between ISO and CEN (Vienna Agreement).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these
...

ISO/DIS FDIS 18636:2025(en)
ISO/TC 45/SC 4/WG 13
Secretariat: DSM
Date: 2025-10-072026-05-21
Rubber or plastic coated fabrics — 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
FDIS stage
TThihis drs draafftt i is s ssuubbmmiitttteedd ttoo aa ppaarraallellel l vvoottee i inn IISSOO,, CCEEN.N.

ISO #####-#:####(X/FDIS 18636:2026(en)
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: + 41 22 749 01 11
EmailE-mail: [e-mail]
Website: www.iso.org
Published in Switzerland
© ISO #### 2026 – All rights reserved
ii
ISO/DISFDIS 18636:20252026(en)
Contents
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 #####-#:####(X/FDIS 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.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types of
ISO document should be noted. This document was drafted in accordance with the editorial rules of the
ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent rights
in respect thereof. As of the date of publication of this document, ISO had not received notice of (a) patent(s)
which may be required to implement this document. However, implementers are cautioned that this may not
represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee
SC 4, Products (other than hoses), in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 248, Textiles and textile products, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
© ISO #### 2026 – All rights reserved
iv
DRAFT International Standard ISO/DIS 18636:2025(en)

Rubber or plastic coated fabrics — Mechanical properties —
Determination of the elongation under load and the residual
deformation
1 Scope
This document specifies the method offor determination of the elongation under load and the residual
deformation of coated fabrics.
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.
ISO 1419:2019, Rubber- or plastics-coated fabrics — Accelerated-ageing tests
ISO 2231, Rubber- or plastics-coated fabrics — Standard atmospheres for conditioning and testing
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
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