1、BS EN ISO 1421:2016Rubber- or plastics-coatedfabrics Determination oftensile strength and elongationat breakBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 1421:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 1
2、421:2016. It supersedes BS EN ISO 1421:1998 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee TCI/69, Footwear, leather and coated fabrics.A list of organizations represented on this committee can be obtained on request to its secretary.This publication
3、does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016. Published by BSI Standards Limited 2016ISBN 978 0 580 85469 9 ICS 59.080.40 Compliance with a British Standard cannot confer immunity fro
4、m legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 December 2016.Amendments/Corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 1421 December 2016 ICS 59.
5、080.40 Supersedes EN ISO 1421:1998English Version Rubber- or plastics-coated fabrics - Determination of tensile strength and elongation at break (ISO 1421:2016)Supports textiles revtus de caoutchouc ou de plastique - Dtermination de la force de rupture et de lallongement la rupture (ISO 1421:2016) M
6、it Kautschuk oder Kunststoff beschichtete Textilien - Bestimmung der Zugfestigkeit und der Bruchdehnung (ISO 1421:2016) This European Standard was approved by CEN on 17 September 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving
7、 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 offici
8、al 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 A
9、ustria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sw
10、eden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for
11、CEN national Members. Ref. No. EN ISO 1421:2016 EEN ISO 1421:2016 (E) 2 Contents Page European foreword . 3 BS EN ISO 1421:2016EN ISO 1421:2016 (E) 3 European foreword This document (EN ISO 1421:2016) has been prepared by Technical Committee ISO/TC 45 “Rubber and rubber products“ in collaboration wi
12、th 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 June 2017, and conflicting national stand
13、ards shall be withdrawn at the latest by June 2017. 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 14
14、21:1998. 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, Former Yugoslav Republic of Macedonia, Fr
15、ance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 1421:2016 has been approved by CEN as EN IS
16、O 1421:2016 without any modification. BS EN ISO 1421:2016BS EN ISO 1421:2016ISO 1421:2016(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 55 Apparatus and reagents 56 Atmosphere for conditioning and testing 66.1 For conditioning . 66.2 For testing . 67 Time-int
17、erval between manufacture and testing. 68 Method 1: Strip test method . 68.1 Sampling and preparation of test pieces 68.2 Procedure 78.2.1 Mounting the test piece in place . 78.2.2 Operation 98.2.3 Slippage 98.2.4 Jaw breaks and the breaks outside the reference marks 98.2.5 Test on wet test pieces 9
18、8.3 Calculation and expression of results. 108.4 Test report 109 Method 2: Grab test method 109.1 Sampling and preparation of test pieces . 109.2 Procedure . 119.2.1 Mounting the test piece in place 119.2.2 Operation . 119.2.3 Slippage . 119.2.4 Jaw breaks. 119.2.5 Test on wet test pieces .119.3 Cal
19、culation and expression of results. 139.4 Test report 13 ISO 2016 All rights reserved iiiContents PageBS EN ISO 1421:2016ISO 1421:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing
20、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 liaiso
21、n 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 Direct
22、ives, 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
23、 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 patent declarat
24、ions received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about
25、 ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.The committee responsible for this document is ISO/TC 45, Rubber and rubber products, Subcommittee SC 4, Products (other than hoses).This thi
26、rd edition cancels and replaces the second edition (ISO 1421:1998), which has been technically revised. The changes are as follows. In Clause 3, gauge length and reference points have been added and Figures 1, 2, and 3 have been moved to clarify the definitions. The title of Clause 5 has been change
27、d. Clause 6 has been subdivided in two subclauses and conditions have been clarified respectively by referring to the particulars specified in ISO 2231:1989. A new clause has been added to specify the time-interval between manufacture and testing. In 8.1, two narrower widths of 10 mm and 30 mm have
28、been added for test piece and the pre-tension forces have been revised accordingly. The procedure for the test pieces with reference mark has been incorporated. In 8.2, the procedure for handling abnormal test results has been modified.iv ISO 2016 All rights reservedBS EN ISO 1421:2016INTERNATIONAL
29、STANDARD ISO 1421:2016(E)Rubber- or plastics-coated fabrics Determination of tensile strength and elongation at breakWARNING Persons using this International Standard should be familiar with normal laboratory practice. This International Standard does not purport to address all of the safety problem
30、s, 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 ScopeThis International Standard specifies two methods for the determination of the tensile strength of fab
31、rics coated with rubber or plastics. Method 1 the strip test method, which is a method for the determination of tensile strength and elongation at break. Method 2 the grab test method, which is a method for the determination of tensile strength only.The methods apply to test pieces in equilibrium wi
32、th specific standard atmospheres for testing and to wet test pieces. Both methods require the use of a constant rate of extension (CRE) tensile-testing machine.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for it
33、s application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 2231:1989, Rubber- or plastics-coated fabrics Standard atmospheres for conditioning and testingISO 2286-2, Rubber- or plas
34、tics-coated fabrics Determination of roll characteristics Part 2: Methods for determination of total mass per unit area, mass per unit area of coating and mass per unit area of substrateISO 7500-1, Metallic materials Calibration and verification of static uniaxial testing machines Part 1: Tension/co
35、mpression testing machines Calibration and verification of the force-measuring system.3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1constant rate of extensionCREmeans of conducting a tensile test in which the rate of increase in the length of
36、the test piece is uniform with timeNote 1 to entry: The rate of increase of the force is dependent upon the extension characteristics of the test piece. ISO 2016 All rights reserved 1BS EN ISO 1421:2016ISO 1421:2016(E)3.2elongationextensionEincrease in length of a test pieceNote 1 to entry: It is ex
37、pressed in units of length, e.g. cm or mm.3.3elongation at breakelongation (3.2) of a test piece corresponding to the force at the breaking pointNote 1 to entry: See Figure 1. It is usually expressed as a percentage of the nominal gauge length (3.9).Y12KeyX elongation, EY force1 maximum force2 force
38、 at break3 elongation at maximum force4 elongation at breakFigure 1 Tensile force at break3.4elongation at maximum forceelongation (3.2) of a test piece produced by the maximum forceNote 1 to entry: See Figure 1, Figure 2 and Figure 3.2 ISO 2016 All rights reservedBS EN ISO 1421:2016ISO 1421:2016(E)
39、1YKeyX elongation, EY force1 maximum force2 elongation at maximum forceFigure 2 Maximum force at break3.5force at breaktensile force recorded at the moment of breakNote 1 to entry: See Figure 1.Note 2 to entry: Figure 3 corresponds to the rupture of one of the elements constituting the coated fabric
40、. Typical examples are:a) a “rigid” polymer layer on an extensible fabric: rupture of the polymer layer;b) a very extensible, thick polymer layer on a weak, less extensible fabric or nonwoven: rupture of the woven fabric or of the nonwoven. ISO 2016 All rights reserved 3BS EN ISO 1421:2016ISO 1421:2
41、016(E)Y13KeyX elongation, EY force1 maximum force2 elongation at maximum force3 rupture of one elementFigure 3 Rupture of one element of a coated fabric3.6gauge lengthlength at a test piece prior to the addition of the pre-tension loaded, measured either from nip to nip of the jaws of the holding cl
42、amps or between the reference points (3.11)3.7grab testtensile strength test in which only the central part of the width of the test piece is gripped in the jaws3.8maximum forcemaximum force recorded in extending the test piece to breaking pointNote 1 to entry: See Figure 1, Figure 2 and Figure 3.3.
43、9nominal gauge lengthlength of a test piece under a specified pre-tension, measured either from nip to nip of the jaws of the holding clamps with the clamps or between the reference points (3.11) in their starting position3.10percentage elongationelongation (3.2) expressed as a percentage of the nom
44、inal gauge length (3.9)3.11reference pointstwo marks which are usually lines perpendicularly across the width of 100 mm apart marked on the surface of a test piece equidistantly from the middle point4 ISO 2016 All rights reservedBS EN ISO 1421:2016ISO 1421:2016(E)3.12strip testtensile strength test
45、in which the full width of the test piece is gripped in the jaws4 PrincipleA test piece is extended at a constant rate of extension until it breaks. For Method 1 (see Clause 8), the maximum force and the elongation at maximum force and, if required, the force at break and the elongation at break are
46、 determined. For Method 2 (see Clause 9), only the maximum force is determined.5 Apparatus and reagents5.1 Constant rate of extension (CRE) tensile testing machine, having the following general characteristics.The machine shall be provided with means for reading and recording both the force applied
47、to the test piece in stretching it to the breaking point and the corresponding extension of the test piece. It shall be provided with a strength indicator having several scales in order to ensure that the rupture of each test piece is obtained with a strength of 15 % to 85 % of the maximum of the sc
48、ale used. Under conditions of use, the accuracy of the apparatus shall be class 1 as defined in ISO 7500-1. The error of the indicated or recorded maximum force at any point in the range in which the machine is used shall not exceed 1 %, and the error of the indicated or recorded jaw separation shal
49、l not exceed 1 mm. After the first 2 s of the test, the rate of increase in the distance between the clamps shall be uniform to within 5 %. If the force and elongation are recorded by means of data acquisition boards and software, the frequency of data collection shall be at least 8 s1.5.2 Clamping device, with the central point of the two jaws of the machine in the line of pull, the front edges at right angles to the line of pull and their clamping faces in the same plane. The jaws shall be capable of holding the te
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