prEN ISO 8067

Flexible cellular polymeric materials - Determination of tear strength (ISO/DIS 8067:2025)

This document specifies two methods for the determination of the tear strength of flexible cellular polymeric materials:
— method A, using a trouser test piece;
— method B, using an angle test piece without a nick.

Flexible Polymer-Schaumstoffe - Bestimmung des Weiterreißwiderstands (ISO/DIS 8067:2025)

Matériaux polymères alvéolaires souples - Détermination de la résistance au déchirement (ISO/DIS 8067:2025)

Le présent document spécifie deux méthodes pour la détermination de la résistance au déchirement des matériaux polymères alvéolaires souples:
— la méthode A, utilisant une éprouvette pantalon;
— la méthode B, utilisant une éprouvette angulaire sans entaille.

Mehki penjeni polimerni materiali - Ugotavljanje pretržne trdnosti (ISO/DIS 8067:2025)

General Information

• Status: Not Published
• Publication Date: 20-Dec-2026
• ICS: 83.100 - Cellular materials
• Technical Committee: CEN/TC 249 - Plastics
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 19-Aug-2025
• Completion Date: 19-Aug-2025
• Ref Project: oSIST prEN ISO 8067:2025 - Flexible cellular polymeric materials - Determination of tear strength (ISO/DIS 8067:2025)

Relations

• Revises: EN ISO 8067:2018 - Flexible cellular polymeric materials - Determination of tear strength (ISO 8067:2018)
• Effective Date: 13-Mar-2024

Overview

The draft international standard prEN ISO 8067:2025, titled Flexible Cellular Polymeric Materials - Determination of Tear Strength, establishes precise methodologies for measuring the tear strength of flexible cellular polymeric materials. Published under the auspices of CEN and ISO Technical Committee ISO/TC 45/SC 4, this standard provides two test methods-Method A using a trouser test piece, and Method B using an angle test piece without a nick. It is designed to help manufacturers, quality controllers, and researchers accurately assess tear resistance, which is critical for ensuring the durability and performance of polymeric foam products.

Key Topics

• Scope and Purpose

  • Specifies two test piece geometries and procedures to determine tear strength, an essential mechanical property for flexible polymeric foams.
  • Applies to flexible cellular polymer materials used in various industrial and commercial applications.

• Test Methods

  • Method A (Trouser Test Piece): Uses a rectangular piece with an elongated cut to simulate a tearing action resembling trousers.
  • Method B (Angle Test Piece): Utilizes a V-shaped die-cut piece without a nick for tear testing, simplifying sample preparation.

• Test Conditions and Preparation

  • Conditioning protocols: Test pieces must be conditioned in controlled atmospheres (23 ± 2 °C, 50 ± 5% RH or 27 ± 2 °C, 65 ± 5% RH) for at least 16 hours.
  • Recommended testing time is at least 72 hours post-manufacture for consistent results, with allowances for earlier testing under specific conditions.
  • Test pieces must be free from voids and flow lines; orientation regarding foam cell direction must be noted.

• Equipment Requirements

  • Tensile-testing machines with class 2 accuracy or better (as per ISO 7500-1).
  • Machines should be capable of recording maximum force at rupture, preferably automatically.

• Procedural Details

  • Specified jaw speeds ranging from 50 mm/min to 500 mm/min depending on test method and referee testing.
  • Guidance on handling tear progression during testing to avoid errors.

• Result Expression and Reporting

  • Tear strength is calculated as the maximum force divided by sample thickness, expressed in newtons per centimetre (N/cm).
  • Results are reported as the median from at least three test samples; additional samples may be tested if variability exceeds 20%.
  • Comprehensive test report requirements including material description, conditioning, test procedure details, and sample orientation.

Applications

• Quality Control and Product Development

  • Ensures that the tear strength of foam and cellular polymer products meets required specifications for industrial, commercial, and safety standards.
  • Helps manufacturers detect defects, optimize formulations, and improve manufacturing processes.

• Material Selection

  • Assists engineers and designers in selecting appropriate flexible cellular polymers for products subjected to tearing forces, such as cushioning, seals, or insulation materials.

• Regulatory Compliance and Certification

  • Provides standardized, internationally recognized test methods facilitating certification processes and regulatory approvals.
  • Supports harmonization of product specifications across different markets.

Related Standards

• ISO 1923 - Cellular plastics and rubbers: Determination of linear dimensions. Useful for precise thickness measurement correlated to tear strength testing.
• ISO 7500-1 - Metallic materials: Calibration and verification of static uniaxial testing machines. Ensures accuracy and validity of tensile testing equipment.
• Other ISO and IEC standards related to polymeric foam materials, mechanical testing, and quality assurance may complement ISO 8067.

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By adopting prEN ISO 8067:2025, industries involved in the production or use of flexible cellular polymeric materials can benefit from reliable, reproducible tear strength testing, enhancing product integrity and performance assurances. This standard contributes significantly to advancing material testing protocols for cellular polymers worldwide.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2025
Mehki penjeni polimerni materiali - Ugotavljanje pretržne trdnosti (ISO/DIS
8067:2025)
Flexible cellular polymeric materials - Determination of tear strength (ISO/DIS
8067:2025)
Flexible Polymer-Schaumstoffe - Bestimmung des Weiterreißwiderstands (ISO/DIS
8067:2025)
Matériaux polymères alvéolaires souples - Détermination de la résistance au
déchirement (ISO/DIS 8067:2025)
Ta slovenski standard je istoveten z: prEN ISO 8067
ICS:
83.100 Penjeni polimeri Cellular materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 8067
ISO/TC 45/SC 4
Flexible cellular polymeric
Secretariat: DSM
materials — Determination of tear
Voting begins on:
strength
2025-05-27
Matériaux polymères alvéolaires souples — Détermination de la
Voting terminates on:
résistance au déchirement
2025-08-19
ICS: 83.100
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 8067:2025(en)
DRAFT
ISO/DIS 8067:2025(en)
International
Standard
ISO/DIS 8067
ISO/TC 45/SC 4
Flexible cellular polymeric
Secretariat: DSM
materials — Determination of tear
Voting begins on:
strength
Matériaux polymères alvéolaires souples — Détermination de la
Voting terminates on:
résistance au déchirement
ICS: 83.100
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 8067:2025(en)
ii
ISO/DIS 8067:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus . 1
5 Test pieces . 2
5.1 General .2
5.2 Trouser test piece for method A .2
5.3 Angle test piece for method B .3
6 Number of test pieces . 4
7 Conditioning . 4
8 Procedure . 4
8.1 General .4
8.2 Method A .4
8.3 Method B .5
9 Expression of results . 6
10 Test report . 6
Annex A (informative) Precision comparison for the two types of test piece. 7
Bibliography . 9

iii
ISO/DIS 8067:2025(en)
Foreword
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bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
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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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent
rights identified during the development of the document will be in the Introduction and/or on the ISO list of
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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).
This fourth edition cancels and replaces the third edition (ISO 8067:2018), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— in 10 f), the location and number of surfaces with skin have been added.
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.

iv
DRAFT International Standard ISO/DIS 8067:2025(en)
Flexible cellular polymeric materials — Determination of tear
strength
WARNING — Persons using this document should be familiar with normal laboratory practice. This
document does not purport to address all of the safety problems, if any, associated with its use. It is
the responsibility of the user to establish appropriate safety and health practices and to determine
the applicability of any national regulatory conditions.
1 Scope
This document specifies two methods for the determination of the tear strength of flexible cellular polymeric
materials:
— method A, using a trouser test piece;
— method B, using an angle test piece without a nick.
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 1923, Cellular plastics and rubbers — Determination of linear dimensions
ISO 7500-1, Metallic materials — Calibration and verificatio
...