1、BS EN ISO2062:2009ICS 59.080.20NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDTextiles Yarnsfrom packages Determination ofsingle-end breakingforce and elongation atbreak using constantrate of extension (CRE)tester (ISO 2062:2009)This British Standardwas publish
2、ed under theauthority of the StandardsPolicy and StrategyCommittee on 30 June2010 BSI 2010ISBN 978 0 580 63643 1Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 2062:2009National forewordThis British Standard is the UK implementation of EN ISO 2062:2009. Itsupersedes BS EN ISO 20
3、62:1995 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee TCI/24, Physical testing of textiles.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary
4、provisionsof a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2062 December 2009 ICS 59.080.20 Supersedes EN ISO 2062:1995English Version Textiles - Y
5、arns from packages - Determination of single-end breaking force and elongation at break using constant rate of extension (CRE) tester (ISO 2062:2009) Textiles - Fils sur enroulements - Dtermination de la force de rupture et de lallongement la rupture des fils individuels laide dun appareil dessai vi
6、tesse constante dallongement (ISO 2062:2009) Textilien - Garne von Aufmachungseinheiten - Bestimmung der Hchstzugkraft und Hchstzugkraftdehnung von Garnabschnitten unter Verwendung eines Prfgerts mit konstanter Verformungsgeschwindigkeit (CRE) (ISO 2062:2009) This European Standard was approved by C
7、EN on 21 November 2009. 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-to-date lists and bibliographical references concerning such national standa
8、rds 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 translation under the responsibility of a CEN member into its own language and notified to
9、 the CEN Management Centre has the same status as the official 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, Ne
10、therlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitati
11、on in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2062:2009: EBS EN ISO 2062:2009EN ISO 2062:2009 (E) 3 Foreword This document (EN ISO 2062:2009) has been prepared by Technical Committee ISO/TC 38 “Textiles“ in collaboration with Technical Committee CEN/TC
12、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 2010, and conflicting national standards shall be withdrawn at the
13、 latest by June 2010. 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 2062:1995. According to the CEN/
14、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, Lu
15、xembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 2062:2009 has been approved by CEN as a EN ISO 2062:2009 without any modification. BS EN ISO 2062:2009ISO 2062:2009(E) ISO 2009 A
16、ll rights reserved iiiForeword 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
17、 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 Commissio
18、n (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 co
19、mmittees 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 no
20、t be held responsible for identifying any or all such patent rights. ISO 2062 was prepared by Technical Committee ISO/TC 38, Textiles, Subcommittee SC 23, Fibres and yarns. This third edition cancels and replaces the second edition (ISO 2062:1993), which has been technically revised. BS EN ISO 2062:
21、2009ISO 2062:2009(E) iv ISO 2009 All rights reservedIntroduction In the 1950s and 1960s when this International Standard was first prepared, three types of tensile testers were in wide use: constant rate of specimen extension (CRE), constant rate of travel (CRT) and constant rate of loading (CRL). I
22、t was therefore advisable to state the rate of operation in a way which would be common to all three types of tester. In addition, the best possible agreement was sought between the test results of the three types of tester. Consequently, the principle of constant time to break was adopted, and 20 s
23、 to break was chosen for this International Standard and also for a number of national standards. In the early 1990s, CRE testers were recognized as the best type. As CRT and CRL testers were still in use internationally, the procedure for using them was included in an informative annex. There is no
24、 assurance that the results from the three types of tester will agree. This International Standard considers CRE testers only, so the time-to-break principle was no longer needed and a simpler statement of rate of extension was used. The rate of extension of 100 % per minute has been adopted as stan
25、dard, but higher rates were permitted by agreement for automatic testers. CRT and CRL testers are now considered to be obsolete. The methods of using them are deprecated and their inclusion in informative Annex A does not have an influence on the status of this International Standard. BS EN ISO 2062
26、:2009INTERNATIONAL STANDARD ISO 2062:2009(E) ISO 2009 All rights reserved 1Textiles Yarns from packages Determination of single-end breaking force and elongation at break using constant rate of extension (CRE) tester 1 Scope 1.1 This International Standard specifies methods for the determination of
27、the breaking force and elongation at break of textile yarns taken from packages. Four methods are given: A: manual; specimens are taken directly from conditioned packages; B: automatic; specimens are taken directly from conditioned packages; C: manual; relaxed test skeins are used after conditioning
28、; D: manual; specimens are used after wetting. 1.2 Method C is used in cases of dispute regarding elongation at break of the yarn. NOTE Methods A, B and C are expected to give the same results for yarn strength, but Method C might give somewhat truer (and higher) values of elongation than A or B. Me
29、thod D is likely to give results differing, for both breaking force and elongation at break, from those obtained by methods A, B or C. 1.3 This International Standard specifies methods using constant rate of specimen extension (CRE) tensile testers. Testing on the now obsolete constant rate of trave
30、l (CRT) and constant rate of loading (CRL) instruments is covered, for information, in Annex A, in recognition of the fact that these instruments are still in use and can be used by agreement. 1.4 This International Standard applies to all types of yarns, except glass, elastomeric, aramid, high mole
31、cular polyethylene (HMPE), ultra high molecular polyethylene (UHMPE), ceramic and carbon yarns and polyolefin tape. NOTE A method for the testing of glass yarns is given in ISO 3341. 1.5 This International Standard is applicable to yarns from packages but can be applied to yarns extracted from fabri
32、cs, subject to agreement between the interested parties. 1.6 This International Standard is intended for the single-end (single-strand) testing of yarns. NOTE The skein method of testing is given in ISO 6939. 2 Normative references The following referenced documents are indispensable for the applica
33、tion 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. BS EN ISO 2062:2009ISO 2062:2009(E) 2 ISO 2009 All rights reservedISO 139, Textiles Standard atmospheres for conditio
34、ning and testing ISO 2060, Textiles Yarn from packages Determination of linear density (mass per unit length) by the skein method 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 breaking force maximum force applied to a specimen in a tensile
35、test carried to rupture NOTE For yarns, the breaking force or load is preferably expressed in centinewtons. 3.2 elongation at break increase in length of a specimen corresponding to the breaking force NOTE For yarns, elongation at break is expressed as a percentage of the initial length. 3.3 breakin
36、g tenacity ratio of a yarns breaking force to its linear density NOTE For yarns, breaking tenacity is expressed in centinewtons per tex. 3.4 constant rate of specimen extension (CRE) tester testing machine in which one end of the specimen is held in a virtually stationary clamp and the other end is
37、gripped in a clamp that is driven at a constant speed NOTE A suitable system is provided for detecting and recording the force applied and the elongation. 3.5 clamp that part of a tensile testing machine used to grip the specimen by means of suitable jaws 3.6 jaws those elements of a clamp which gri
38、p the specimen 3.7 gauge length nominal length distance between the clamping points of the tester NOTE With bollard or capstan clamps, it is the distance between their gripping points, measured along the path of the yarn. 3.8 initial length length of a test specimen (between the clamping points) und
39、er specified pretension at the beginning of the test 3.9 package length of yarn in a form suitable for use, handling, storing, etc. NOTE Packages can be supported (e.g. cones, bobbins) or unsupported (e.g. skeins, balls). BS EN ISO 2062:2009ISO 2062:2009(E) ISO 2009 All rights reserved 34 Principle
40、A specimen of yarn is extended until rupture by a suitable mechanical device, and the breaking force and elongation at break are recorded. A constant rate of extension of 100 % per minute (based on the gauge length) is used, but higher or lower rates are permitted by agreement. Two gauge lengths are
41、 permitted: usually 500 mm (with a rate of extension of 500 mm/min), and exceptionally 250 mm (with a rate of extension of 250 mm/min). 5 Apparatus and reagents 5.1 Constant rate of specimen extension (CRE) tester, which complies with the following requirements. The tester shall be capable of being
42、set at gauge lengths of 500 mm 2 mm or 250 mm 1 mm, or preferably both. The constant rate of extension of the moving clamp shall be 500 mm/min 10 mm/min or 250 mm/min 5 mm/min, to an accuracy of 2 %, with lower or, for automatic testers, higher rates being permitted by agreement. The maximum error o
43、f the indicated force shall not exceed 2 % of the true force. The tester may be of the manual or automatic type. The clamps for gripping the specimens shall prevent slipping or cutting of the specimens and breaks at the jaws. Flat-faced unlined jaws shall be the normal type but, if these cannot prev
44、ent slippage, then other types of clamps may be used on agreement, such as lined jaws, bollard clamps or other types of snubbing devices. As the type of clamp may influence the reading of the elongation, all interested parties shall use the same type. The tester shall be equipped with an autographic
45、 force/elongation recording device of sufficiently fast response, or with a system directly recording the breaking force and elongation at break. The tester shall be capable of setting a pretension either by means of a set of pretensioning weights or by using the force-measuring device. 5.2 Reel, fo
46、r preparing test skeins from the laboratory sample (for methods C and D). 5.3 Swift or similar device, for holding the test skein under zero tension and permitting easy transfer of the yarn to the tensile tester (for Method C). 5.4 Receptacles, for immersing the sample or the specimens in water (for
47、 Method D). 5.5 Tap water, at room temperature (for Method D). 5.6 Non-ionic surfactant, 0,1 % (volumetric) aqueous solution (for Method D). 6 Sampling 6.1 Samples shall be taken in accordance with a) the directions given in the material specification when available, or b) the procedures described i
48、n 6.2 to 6.7. BS EN ISO 2062:2009ISO 2062:2009(E) 4 ISO 2009 All rights reserved6.2 A bulk sample shall be taken of one or more cases, as representative of the lot to be tested as shown in Table 1. Table 1 Sampling frequency Number of cases Number of cases selected at random 3 or less 1 4 to 10 2 11
49、 to 30 3 31 to 75 4 76 or more 5 6.3 If only mean values are required, then 10 packages shall be taken from the bulk sample, distributed as evenly as possible among the cases and among the levels in each case. 6.4 Except for the provisions of 6.5, the minimum number of specimens to be tested shall be 50 for single-spun yarns and 20 for other yarns. The specimens shall be distributed as evenly as possible among the 10 packages. 6.5 If the variability of the test is known and only mean values are required, then t
