1、BRITISH STANDARD BS EN 29073-3:1992 ISO 9073-3: 1989 Incorporating Amendment No. 1 Methods of tests for Nonwovens Part 3: Determination of tensile strength and elongation The European Standard EN 29073-3:1992 has the status of a British Standard UDC 677.076.4:677.017.42:620.172BSEN 29073-3:1992 This
2、 British Standard, having been prepared under the directionof the Textiles and Clothing Standards Policy Committee, was published underthe authority of the BoardofBSI and comes into effect on 31 October 1990 BSI 03-1999 The following BSI references relate to the work on this standard: Committee refe
3、rence TCM/19 Draft for comment 87/38338 DC ISBN 0 580 18394 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Textiles and Clothing Standards Policy Committee (TCM/-) to Technical Committee TCM/19, upon which the following bodies were re
4、presented: British Clothing Industry Association British Nonwovens Manufacturers Association British Textile Employers Association British Textile Technology Group Furniture Industry Research Association Guild of Hospital Pharmacists Man-made Fibres Producers Committee National Fillings Trades Assoc
5、iation Surgical Dressings Manufacturers Association Amendments issued since publication Amd. No. Date Comments 7010 November 1992 Indicated by a sideline in the marginBSEN 29073-3:1992 BSI 03-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 29
6、073-3 3 Publication(s) referred to Inside back coverBSEN 29073-3:1992 ii BSI 03-1999 National foreword This Part of BS 7304 has been prepared under the direction of the Textiles and Clothing Standards Policy Committee. It is identical with ISO 9073-3:1989 “Textiles Test methods for nonwovens Part 3:
7、 Determination of tensile strength and elongation”. The international standard was prepared by Technical Committee 38, Textiles, of the International Organization for Standardization (ISO) with the active participation of the UK. In 1992 the European Committee for Standardization (CEN) accepted ISO9
8、073-3:1989 as European Standard EN29073-3:1992. As a consequence of implementing the European Standard this British Standard is renumbered as BSEN 29073-3 and any reference to BS7304-3 should be read as a reference to BSEN 29073-3. In the cross-references, delete “BS 1051:1981 Glossary of terms rela
9、ting to the conditioning, testing and mass determination of textiles (Technically equivalent)” and substitute the following. BS EN 20139:1992, Textiles Standard atmospheres for conditioning and testing (Identical). The Technical Committee has reviewed the provisions of ISO 5081:1977, to which refere
10、nce is made in the text, and has decided that they are acceptable for use in conjunction with this standard. Attention is drawn to the following British Standard which is related to ISO5081, and gives methods of test for woven fabrics which are also applicable to certain nonwovens. BS 2576:1986, Met
11、hod for determination of breaking strength and elongation (strip method) of woven fabrics. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not
12、of itself confer immunity from legal obligations. Cross-references International standard Corresponding British Standard ISO 139:1973 BS 1051:1981 Glossary of terms relating to the conditioning, testing and mass determination of textiles (Technically equivalent) ISO 186:1985 BS 3430:1986 Method for
13、sampling to determine the average quality of paper and board (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may
14、have had amendments incorporated. This will be indicated in the amendment table on theinside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 29073-3 June 1992 UDC 677.076.4:677.017.42:620.172 Descriptors: Textiles, fabrics, nonwoven fabrics, tests, tension tests, tensile strength, e
15、longation at break English version Textiles Test methods for nonwovens Part 3: Determination of tensile strength and elongation Textile Mthodes dessai pour nontisss Partie 3: Dtermination de la rsistance la traction et de lallongement Textilien Prfverfahren von Vliesstoffe Teil 3: Bestimmung der Hch
16、stzugkraft und der Hochstzugkraftdehnung This European Standard was approved by CEN on 1992-06-26. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-t
17、o-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under
18、 the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlan
19、ds, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1992 Copyright reserved to CEN members Ref. No. EN 29073-3:1992 EEN29
20、073-3:1992 BSI 03-1999 2 Foreword The European Standard has been taken over by CEN/TC 248 “Textiles and textile products” from the work of ISO/TC 38 “Textiles” of the International Organization for Standardization (ISO). The document was submitted to the CEN members to the Unique Acceptance Procedur
21、e and was approved without any modification. National standards identical to this European Standard shall be published at the latest by 1992-12-31 and conflicting national standards shall be withdrawn at the latest by 1992-12-31. Following the CEN/CENELEC Common Rules the following countries are bou
22、nd to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. Contents Page Foreword 2 Introduction 3 1 Scope 3 2 Normative references 3 3 Principle
23、3 4 Apparatus 3 5 Sampling 3 6 Preparation and conditioning of test pieces 3 7 Procedure 3 8 Expression of results 4 9 Test report 4ISO9073-3:1989(E) BSI 03-1999 3 Introduction Although nonwovens are classified within the textile industry, it should be recognized that nonwovens technologically share
24、 characteristics not only with textile products but also with paper and/or plastic products. There is an existing international textile test, ISO5081. However, in order to meet the specific needs of nonwovens, alternative requirements to those listed in ISO 5081 are specified in this part of ISO9073
25、. These are a) a different sampling procedure; b) a constant rate of extension, i.e. 100mm/min. 1 Scope This part of ISO 9073 specifies a method for the determination of the tensile properties of nonwovens by the cut strip method. NOTEAnomalies can occur when testing some spun-laid and glass fibre n
26、onwovens. This may require modification of the test procedure. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 9073. At the time of publication, the editions indicated were valid. All standards are sub
27、ject to revision, and parties to agreements based on this part of ISO 9073 are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 139:1973, Textiles St
28、andard atmospheres for conditioning and testing. ISO 186:1985, Paper and board Sampling to determine average quality. ISO 5081:1977, Textiles Woven fabrics Determination of breaking strength and elongation (Strip method). 3 Principle Application of a force longitudinally to a test piece of a specifi
29、ed length and width at a constant rate of extension. Determination of values for breaking strength and elongation from the recorded force-elongation curve. 4 Apparatus 4.1 Tensile testing machine, constant rate of extension type, equipped with an autographic recorder to register applied force and cl
30、amp separation. 4.2 Clamps, with jaws capable of holding the test pieces securely across their full width without damage. 5 Sampling Carry out sampling in accordance with ISO186, where possible taking test specimens of an approximate length at 1m from the full width of the material. Ensure that the
31、areas from which the specimens are taken have no visible flaws and are not creased. NOTEThis method of sampling recognizes and makes provisions for “anisotropy” (differences in properties along various directions, principally machine and cross direction) in the final specimens. However, these specim
32、ens are random representatives of the material and in some cases it may be desirable to investigate systematic variations of properties (including anisotropy), for example across the width, or in certain positions along the length of a given reel. In all such cases, special provisions should be agre
33、ed between purchaser and vendor and recorded in the test report. A procedure for more detailed examination of variability within a given batch of material is available in TAPPIT 11-05-74 and may be found helpful. This publication may be obtained from: The Technical Association of Pulp and Paper Indu
34、stries, 1Dun woody Park, Atlanta, Georgia30338,USA. 6 Preparation and conditioning of test pieces 6.1 Unless otherwise specified, cut five test pieces in the machine direction and five in the cross-machine direction, ensuring that they are all taken at least100mm from the edge and are equally distri
35、buted across the width and length of the specimen. 6.2 Cut the test pieces 50mm 0,5mm wide and of sufficient length to allow a jaw separation of200mm, thus avoiding risks due to local heterogeneity of nonwovens or to undue cutting of long-fibre nonwovens. NOTEWider test pieces and different forms of
36、 clamping, e.g. C-form or piped form, may be used by agreement between the interested parties; a note of these special conditions should be included in the test report. 6.3 Condition the test pieces as specified in ISO139. 6.4 If wet tensile tests are required, soak the test pieces, without conditio
37、ning, for at least 1 h in a solution containing 1g of a non-ionic wetting agent per litre of distilled water. Remove a test piece, shake off excess water, and test immediately. Repeat the operation for each of the other nine test pieces. NOTEA wetting time of less than 1h may be used by agreement be
38、tween the interested parties; if so, it should be noted in the test report. 7 Procedure 7.1 Carry out the testing in the standard atmosphere for testing (see ISO139).ISO9073-3:1989(E) 4 BSI 03-1999 7.2 Set the jaws of the tensile testing machine200mm 1mm apart and clamp the test piece between them;
39、straighten out the test piece until the force curve is on the zero line. NOTE 1Pretensioning may be applied as described in ISO5081; if so, it should be noted in the test report. NOTE 2Where 200mm is not available, a shorter test piece may be tested by agreement between the interested parties; if so
40、, this should be noted in the test report. 7.3 Apply a constant rate of extension of 100mm/min and record the force-elongation curve for each test piece. NOTEOther rates of extension may be desirable and should be agreed between the interested parties; if so, they should be noted in the test report.
41、 8 Expression of results 8.1 Use the force-elongation curve to determine the maximum breaking strength in newtons. If several peak values for the breaking strength occur during the test, take the highest value as the maximum breaking strength, and note this occurrence in the test report. 8.2 Determi
42、ne the elongation of the test piece at the maximum breaking strength and express this as a percentage of the nominal gauge length, that is, the original jaw separation. 8.3 Discard the results from any test piece where the break occurs in the clamp or where any break reaches the jaws at a minimum of
43、 one point. 8.4 Determine the means of the results, expressing the average breaking strength, in newtons, to the nearest 0,1N, and the average percentage elongation at break to the nearest 0,5%. Calculate the coefficients of variation of the results. NOTERupture energy may also be calculated from th
44、e total area under the curve. 9 Test report The test report shall include the following information: a) a reference to this part of ISO 9073; b) all details necessary for the identification of the material; c) the results of the test in both the machine direction and cross direction (see8.4); d) the
45、 conditioning atmosphere used; e) any unusual features noted during the testing, or deviations from the standard procedure.BSEN 29073-3:1992 BSI 03-1999 Publication(s) referred to See national foreword.BS EN 29073-3:1992 ISO 9073-3: 1989 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsIn
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