1、UDC 677.076.4 : 677.017.42 : 620.172 DEUTSCHE NORM August 1992 DIN Textiles Determination of tensile strength and elongation Test methods for nonwovens EN 29 073 (IS0 9073-3 : 1989) I I English version of DIN EN 29 073 Part 3 Part 3 This standard incorporates the English version of Is0 9073-3. Texti
2、lien; Prfverfahren fr Vliesstoffe; Bestimmung der Hchstzugkraft und der Hchstzugkraftdehnung (IS0 9073-3 : 1989) Supersedes DIN 53 857 Part 2, September 1979 edition. European Standard EN 29 073-3 : 1992 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This
3、standard has been published in accordance with a decision taken by CEN/TC 248 to adopt, without alteration, International Standard IS0 9073-3 : 1989 as a European Standard. The responsible German body involved in the preparation of this standard was the Normenausschu Materialprfung (Materials Testin
4、g Standards Committee), Technical Committee Prfung von Viiesstoffen. The DIN Standards corresponding to the International Standards referred to in clause 2 of the EN are as follows: IS0 Standard DIN Standard IS0 139 IS0 186 DIN IS0 186 IS0 5081 DIN EN 20 139 DIN 53 857 Part 1 Standards referred to (
5、and not included in Normative references) DIN EN 20 139 Textiles; standard atmospheres for conditioning and testing DIN 53 857 Part 1 Testing of textiles; simple tensile test on strips of textile fabric, woven fabric and ribbons Previous edition DIN 53 857 Part 2: 09.79. Amendments In comparison wit
6、h DIN 53 857 Part 2, September 1979 edition, the following amendments have been made. a) Pretensioning of the test piece during clamping is no longer required. b) There is no longer any relationship between the nominal gauge length and the elongation. c) The test is to be carried out at a constant r
7、ate of extension of 100 mm/min. d) Testing of test pieces in piped form shall be subject to agreement. EN comprises 4 pages. Beuth Verlag GmbH, Berlin, has the exclusive right of sale for German Standards (DIN-Normen). DIN EN 29 073 Part 3 Eng/. Price group 5 06.93 Sales No. 1105 EUROPEAN STANDARD N
8、ORME EUROPENNE EUROPISCHE NORM EN 29 073-3 June 1992 UDC 677.076.4 : 677.01 7.42 : 620.1 72 Descriptors: Textiles, fabrics, nonwovens, testing, tensile tests, tensile strength, elongation at break. English version Textiles Test methods for nonwovens Part 3: Determination of tensile strength and elon
9、gation (IS0 9073-3 : 1989) Textiles: mthodes dessai pour nontisss. Partie 3: Dtermination de la rsistance ia traction et de Textilien: Prfverfahren fr Vliesstoffe. Teil 3: Bestimmung der Hchstzugkraft und der Hchstzugkraftdehnung lallongement (IS0 9073-3 : 1989) (IS0 9073-3 : 1989) This European Sta
10、ndard was approved by GEN on 1992-06-26 and is identical to the IS0 Standard as referred to. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date
11、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). Aversion in any other language made by translation under the res
12、ponsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officiai versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norw
13、ay, 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 01992. Copyright reserved to all CEN members. Ref. No. EN 29 073-3 : 1992 E P
14、age 2 EN 29 073-3 1992 Foreword International Standard IS0 9073-3 : 1989 Textiles; test methods for nonwovens; determination of tensile strength and elongation has been adopted by CEN/TC 248 Textiles and textile products from the work of ISO/TC 38 Textiles. The document was submitted to the CEN memb
15、ers to the Unique Acceptance Procedure and was approved without any modification. In the countries bound to implement this European Standard, a national standard identical to this European Standard shall be published, and conflicting national standards withdrawn, by 1992-12-31 at the latest. In acco
16、rdance with the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Endo
17、rsement notice The text of the International Standard IS0 9073-3 : 1989 was approved by CEN as a European Standard without any modifi- cation. 1 Scope This part of IS0 9073 specifies a method for the determination of the tensile properties of nonwovens by the cut strip method. NOTE - Anomalies can o
18、ccur when testing some spun-laid and glass fibre nonwovens. This may require modification of the test procedure. Page 3 EN 29 073-3 : 1992 5 Sampling 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 907
19、3. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0 9073 are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and IS0 m
20、ain- tain registers of currently valid International Standards. IS0 139 : 1973, Textiles - Standard atmospheres for con- ditioning and testing. IS0 186 : 1985, Paper and board - Sampling to determine average quality. IS0 5081 : i97, Textiles - Woven fabrics - Determination of breaking strength and e
21、longation (Strip method). 3 Principle Application of a force longitudinally to a test piece of a specified 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,
22、 constant rate of extension type, equipped with an autographic recorder to register applied force and clamp separation. 4.2 Clamps, with jaws capable of holding the test pieces securely across their full width without damage. Carry out sampling in accordance with IS0 186, where possible taking test
23、specimens of an approximate length at 1 m from the full width of the material. Ensure that the areas from which the specimens are taken have no visible flaws and are not creased. NOTE - This method of sampling recognizes and makes provisions for “anisotropy“ (differences in properties along various
24、directions, princi- pally machine and cross direction) in the final specimens. However, these specimens 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 cert
25、ain positions along the length of a given reel. In all such cases, spe- cial provisions should be agreed 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 TAPPI T 11-05-74 and may be
26、 found helpful. This publication may be obtained from : The Technical Association of Pulp and Paper Industries, 1 Dun- woody Park, Atlanta, Georgia 30338, 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
27、cross-machine direction, ensuring that they are ail taken at least 100 mm from the edge and are equally distributed across the width and length of the specimen. 6.2 Cut the test pieces 50 mm _+ 0,5 mm wide and of suf- ficient length to allow a jaw separation of 200 mm, thus avoiding risks due to loc
28、al heterogeneity of nonwovens or to undue cutting of long-fibre nonwovens. NOTE - Wider test pieces and different forms of 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 Condi
29、tion the test pieces as specified in IS0 139. 6.4 If wet tensile tests are required, soak the test pieces, without conditioning, for at least 1 h in a solution containing Page 4 EN 29 073-3 : 1992 1 g of a non-ionic wetting agent per litre of distilled water. Remove a test piece, shake off excess wa
30、ter, and test im- mediately. Repeat the operation for each of the other nine test pieces. NOTE - A wetting time of less than 1 h may be used by agreement between the interested parties; if so, it should be noted in the test report. 7 Procedure 7.1 testing (see IC0 139). Carry out the testing in the
31、standard atmosphere for 7.2 Set the jaws of the tensile testing machine 200 mm i 1 mm apart and clamp the test piece between them; straighten out the test piece until the force curve is on the zero line. NOTES 1 Pretensioning may be applied as described in IS0 5081; if so, it should be noted in the
32、test report. 2 Where 200 mm k not available, a shorter test piece may be tested by agreement between the interested parties; if CO, this should be noted in the test report. 7.3 Apply a constant rate of extension of 100 mm/min and record the force-elongation curve for each test piece. NOTE - Other ra
33、tes of extension may be desirable and should be agreed between the interested parties; if so, they should be noted in the test report. 8 Expression of results 8.1 Use the force-elongation curve to determine the maxi- mum breaking strength in newtons. If several peak values for the breaking strength
34、occur during the test, take the highest value as the maximum breaking strength, and note this occur- rence in the test report. 8.2 Determine the elongation of the test piece at the maxi- mum breaking strength and express this as a percentage of the nominal gauge length, that is, the original jaw sep
35、aration. 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 one point. 8.4 Determine the means of the results, expressing the average breaking strength, in newtons, to the nearest 0.1 N, and the average percentage elong
36、ation at break to the nearest 0.5 %. Calculate the coefficients of variation of the results. NOTE - Rupture energy may also be calculated from the total area under the curve. 9 Test report The test report shali include the following information : a) a reference to this part of IS0 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 (see 8.4); d) the conditioning atmosphere used; e) any unusual features noted during the testing, or devi- ations from the standard procedure.
