SIST EN ISO 1798:2009

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Penjeni polimerni materiali - Ugotavljanje natezne trdnosti in raztezka pri pretrgu (ISO 1798:2008)Weich-elastische polymere Schaumstoffe - Bestimmung der Zugfestigkeit und der Bruchdehnung (ISO 1798:2008)Matériaux polymeres alvéolaires souples - Détermination de la résistance a la traction et de l'allongement a la rupture (ISO 1798:2008)Flexible cellular polymeric materials - Determination of tensile strength and elongation at break (ISO 1798:2008)83.100Penjeni polimeriCellular materialsICS:Ta slovenski standard je istoveten z:EN ISO 1798:2008SIST EN ISO 1798:2009en,fr,de01-februar-2009SIST EN ISO 1798:2009SLOVENSKI
STANDARDSIST EN ISO 1798:20001DGRPHãþD



SIST EN ISO 1798:2009



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 1798February 2008ICS 83.100Supersedes EN ISO 1798:1999
English VersionFlexible cellular polymeric materials - Determination of tensilestrength and elongation at break (ISO 1798:2008)Matériaux polymères alvéolaires souples - Déterminationde la résistance à la traction et de l'allongement à larupture (ISO 1798:2008)Weich-elastische polymere Schaumstoffe - Bestimmungder Zugfestigkeit und der Bruchdehnung (ISO 1798:2008)This European Standard was approved by CEN on 12 January 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 1798:2008: ESIST EN ISO 1798:2009



EN ISO 1798:2008 (E) 2 Contents Page Foreword.3
SIST EN ISO 1798:2009



EN ISO 1798:2008 (E) 3 Foreword This document (EN ISO 1798:2008) has been prepared by Technical Committee ISO/TC 45 "Rubber and rubber products" in collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN. 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 August 2008, and conflicting national standards shall be withdrawn at the latest by August 2008. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 1798:1999. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 1798:2008 has been approved by CEN as a EN ISO 1798:2008 without any modification.
SIST EN ISO 1798:2009



SIST EN ISO 1798:2009



Reference numberISO 1798:2008(E)© ISO 2008
INTERNATIONAL STANDARD ISO1798Fourth edition2008-02-01Flexible cellular polymeric materials — Determination of tensile strength and elongation at break Matériaux polymères alvéolaires souples — Détermination de la résistance à la traction et de l'allongement à la rupture
SIST EN ISO 1798:2009



ISO 1798:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
COPYRIGHT PROTECTED DOCUMENT
©
ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 • CH-1211 Geneva 20 Tel.
+ 41 22 749 01 11 Fax
+ 41 22 749 09 47 E-mail
copyright@iso.org Web
www.iso.org Published in Switzerland
ii © ISO 2008 – All rights reserved
SIST EN ISO 1798:2009



ISO 1798:2008(E) © ISO 2008 – All rights reserved iiiContents Page Foreword.iv 1 Scope.1 2 Normative references.1 3 Terms and definitions.1 4 Apparatus.2 5 Test pieces.2 6 Procedure.4 7 Calculation.4 8 Test report.5 Annex A (informative)
Comparative testing of type 1 and type 1A test pieces.6 Bibliography.11
SIST EN ISO 1798:2009



ISO 1798:2008(E) iv © ISO 2008 – All rights reserved 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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. ISO 1798 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 1798:1997), which has been technically revised. It also incorporates the Technical Corrigendum ISO 1798:1997/Cor.1:2003. The main change is the introduction of a second type of test piece (see Figure 1) and a comparison of the results obtained with the two test pieces (see Annex A).
SIST EN ISO 1798:2009



INTERNATIONAL STANDARD ISO 1798:2008(E) © ISO 2008 – All rights reserved 1Flexible cellular polymeric materials — Determination of tensile strength and elongation at break WARNING — Persons using this International Standard should be familiar with normal laboratory practice. This standard 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 ensure compliance with any national regulatory conditions. 1 Scope This International Standard specifies a method for determining the strength and deformation properties of flexible cellular materials when a test piece is extended at a constant rate until it breaks. 2 Normative references The following referenced documents are indispensable for the application 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 7500-1:2004, Metallic materials — Verification of static uniaxial testing machines — Part 1: Tension/compression testing machines — Verification and calibration of the force-measuring system ISO 9513, Metallic materials — Calibration of extensometers used in uniaxial testing ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test methods 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 tensile strength TS maximum tensile stress applied when stretching a test piece to rupture 3.2 elongation at break Eb percentage elongation of a test piece at rupture SIST EN ISO 1798:2009



ISO 1798:2008(E) 2 © ISO 2008 – All rights reserved 4 Apparatus 4.1 Tensile-testing machine, complying with the following requirements: ⎯ the rate of travel of the power-actuated grip shall be 500 mm/min ± 50 mm/min and shall be uniform at all times; ⎯ the accuracy of the machine shall conform to class 0,5 or class 1 of ISO 7500-1:2004 for force-measurement over the range of loading employed. For the determination of elongation at break, the machine may be equipped with either a mechanical or an optical extensometer. If used, however, the extensometer shall comply with the following requirements which shall be verified in accordance with ISO 9513: ⎯ initial gauge length accurate to ± 1 %; ⎯ gauge length at break accurate to ± 1,25 mm. When a mechanical contact extensometer is used, care shall be taken that the contact elements do not damage the test piece. In addition, their mass and inertia shall not influence the determination of the maximum tensile strength by more than 1 %. 5 Test pieces 5.1 Direction of sampling If the product shows a predominant direction of the cellular structure (orientation of the cells), the test pieces for the tensile test shall be taken in such a way that their longitudinal axes lie at right angles to this predominant direction. If it is not possible, the location of the longitudinal axis w
...