BS EN 12423-1999 Polypropylene twines《聚丙烯绳》.pdf

《BS EN 12423-1999 Polypropylene twines《聚丙烯绳》.pdf》由会员分享，可在线阅读，更多相关《BS EN 12423-1999 Polypropylene twines《聚丙烯绳》.pdf（10页珍藏版）》请在麦多课文档分享上搜索。

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12423:1999 The Euro

2、pean Standard EN 12423:1999 has the status of a British Standard ICS 59.080.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Polypropylene twinesThis British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published

3、 under the authority of the Standards Committee and comes into effect on 15 September 1999 BSI 09-1999 ISBN 0 580 32717 5 BS EN 12423:1999 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard is the English language version of EN 12423:1999. The UK parti

4、cipation in its preparation was entrusted to Technical Committee TCI/77, Ropes, cordage and nets, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interes

5、ts informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referre

6、d to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a con

7、tract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cov

8、er. The BSI copyright notice displayed in this document indicates when the document was last issued.EUROPEAN STANDARD EN 12423 NORME EUROPENNE EUROPISCHE NORM April 1999 ICS 59.080.20 English version Polypropylene twines Ficelles polypropylne Polypropylen-Bindegarne This European Standard was approv

9、ed by CEN on 1 April 1999. 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 sta

10、ndards 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 the responsibility of a CEN member into its own language and notified t

11、o the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and Uni

12、ted Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 124

13、23:1999 EPage 2 EN 12423:1999 BSI 09-1999 Foreword This European Standard has been prepared by 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

14、identical text or by endorsement, at the latest by October 1999, and conflicting national standards shall be withdrawn at the latest by October 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this Europea

15、n Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.Page 3 EN 12423:1999 BSI 09-1999 1 Scope This European Standard specifies requirements for tw

16、ines made from polypropylene. It specifies the methods for their manufacture, their physical characteristics, as well as describing test methods to verify these characteristics. This standard allows ultra violet light inhibitors to be added but does not require them to be added. Requirements for the

17、 commercial presentation of twines are also specified. This standard does not specify requirements for agricultural twines made of polyolefin, which are covered according to EN 906:1996. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other p

18、ublications. These normative references are cited at the appropriate places in the text and the cited publications are listed hereafter. For dated references, subsequent amendments to, or revisions of, any of these publications apply to this standard only when incorporated in it by amendment or revi

19、sion. For undated references, the latest edition of the publication referred to applies. EN 20139, Textiles Standard atmospheres for conditioning and testing. (ISO 139:1973) EN 10002-2, Metallic materials Tensile testing Part 2: Verification of the force measuring system of the tensile testing machi

20、nes. EN 919:1995, Fibre ropes for general service Determination of certain physical and mechanical properties. EN 906:1996, Polyolefin agricultural twines. 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. 3.1 twine product made from a sin

21、gle yarn or from a number of plied yarns assembled in such a way as to form a continuous length 3.2 ply number of yarns composing the twine 3.3 colouring process of adding colouring matter to the polypropylene before extrusion to provide a finished twine of a defined shade 3.4 batch definite quantit

22、y of twine produced under conditions which are presumed uniform 3.5 package number of balls or spools of twine which are contained within a common wrapper 3.6 breaking force maximum tensile force that the twine can withstand when testedPage 4 EN 12423:1999 BSI 09-1999 3.7 minimum breaking force nomi

23、nal breaking force which at least has to be achieved during the single tests 3.8 production run material which is made continuously on one machine or on a set of machines with no changes being made to the machine settings and without any change in the material composition 3.9 laboratory test selecti

24、on of all samples of one lot/production quantity for laboratory tests 4 Designation A twine shall be designated by: a) the material from which the twine is made; b) the word twine; c) the number of plies in the twine; d) the nominal linear density of the twine in ktex; e) the direction of twist; f)

25、the colour; g) the number of this standard. Example of designation: a polypropylene twine of 2 ply having a linear density of 2,04 ktex with “S” twist black coloured conforming to EN 12423 is designated as follows: TWINE EN 12423 PP 2 2,04 S black. 5 Manufacture 5.1 Polypropylene twines shall be mad

26、e from mechanically fibrillated polypropylene film tapes in order to achieve a softer yarn. NOTE Additives can be used to colour the material or to improve other characteristics. 5.2 A specific request shall be made if an additive is needed in order to increase the twines resistance against ultra vi

27、olet rays. 5.3 Each spool or ball of twine shall be continuous throughout its length and shall contain no loose ends. NOTE Knots in the twine are permitted provided that these do not exceed two in number per spool or ball.Page 5 EN 12423:1999 BSI 09-1999 6 Main requirements of polypropylene twines W

28、hen tested in accordance with clause 7 twines shall meet the requirements of Table 1. Table 1 Main requirements of polypropylene twines Linear density 1)of twine Linear density of single ply Minimum breaking force Maximum elongation at rupture tex 2) Single ply 2 ply 3 ply Single ply 2 ply 3 ply Tol

29、erance Tolerance Equivalent daN daN daN % 8 % 6 % 6 % 8 % metric number tex m/kg tex m/kg tex m/kg tex m/kg 6 670 150 0,15 221 4 440 225 0,225 148 3 330 300 10 190 98 3 330 300 0,3 111 339 20 2 000 500 6 120 163 2 000 500 0,5 66 204 20 1 430 699 2 920 342 4 370 229 1 430 699 0,7 48 97 145 20 1 000 1

30、 000 2 040 490 3 060 327 1 000 1 000 1 33 67 102 20715 1 399 1 450 699 2 170 461 715 1 399 1,4 23 48 72 20500 2 000 1 020 980 1 530 654 500 2 000 2 34 51 20 1)Linear density of twine as T in tex or L in m/kg: where T = linear density in tex; L = runnage in m/kg. 2) tex = g/1 000 m. 7 Methods of test

31、 7.1 Sampling 7.1.1 The number of samples required shall be determined in accordance with Table 2 and the samples shall be taken from the batch at random. 7.1.2 Not more than one sample shall be taken from each package. Table 2 Number of samples Quantity in the production run No. of samples t 1 1 1

32、and 2,5 2 2,5 and 5 3 5 and 10 4 10 5 7.1.3 The first 10 m of twines shall be discarded at the end of the package. 7.1.4 Test samples shall be removed with care from the package so that twist is neither added nor removed from them. L T 6 10 =Page 6 EN 12423:1999 BSI 09-1999 7.2 Conditioning 7.2.1 Th

33、e tests shall be carried out in ambient atmospheric conditions. In case of arbitration, the specimens shall be left 24 h in the standard atmosphere for testing specified in EN 20139 which has a temperature of (20 2) C and a relative humidity of (65 2) %, before continuing with the tests. 7.3 Determi

34、nation of linear density 7.3.1 Measure a length of at least 10 m under sufficient tension by hand to straighten the twine. 7.3.2 Determine the mass of each specimen length to an accuracy of 0,5 %. 7.3.3 Calculate the linear density in the unitary system appropriate for the product. NOTE Expression o

35、f the result in tex units is recommended. 7.4 Determination of breaking force 7.4.1 Test specimen of twine shall be tested using a tensile testing machine calibrated in accordance with EN 10002-2, and which shall demonstrate a minimum accuracy of 2 %. The testing machine shall be within its period o

36、f valid calibration. 7.4.2 Have a sufficient length of specimen to provide a minimum effective length between the grips of the testing machine of 250 mm, conforming to annex B of EN 919:1995. 7.4.3 Secure the specimen in the testing machine by means of appropriate grips which have been designed for

37、the purpose. Under no circumstances shall the specimen be connected to the grips by knotting. 7.4.4 Check that the speed of movement of the moving grips of the machine is constant and equal, in millimetres per minute, within 10 %, to the length in millimetres of the specimen between the grips as def

38、ined in 7.4.2. 7.4.5 Perform five tests on each specimen. Each test shall be taken at a minimum distance of 5 m along the twine from the previous one. 7.4.6 Record each result in decanewtons. 7.4.7 The results, when averaged, shall equal or exceed those values quoted for the twine in Table 1. 7.4.8

39、Not more than two individual results of the six shall be less than 8 % for single ply twines, and 6 % for 2 or 3 ply twines quoted for the twine in Table 1.Page 7 EN 12423:1999 BSI 09-1999 8 Test report A written test report shall be compiled after testing, which will include: a) reference to this E

40、uropean Standard; b) test report reference; c) reference of the twine stated in this standard (description of the material); d) linear densities obtained for the specimen; e) individual breaking forces obtained for the specimen; f) average breaking forces obtained from the specimen; g) any operating

41、 details and details of any incident liable to have an effect upon the results; h) date of the report, name, title, and signature of the person conducting the tests. 9 Commercial presentation 9.1 Polypropylene twines shall be supplied in balls or in spools. 9.2 All twines shall be neatly and securel

42、y made up into packages as ordered. NOTE 1 When the twines are supplied in ball, the recommended masses should be 100 g, 250 g, 500 g, 1 kg or 2 kg. NOTE 2 When the twines are supplied in spool, the recommended masses should be 1 kg, 2 kg or 4 kg. Package size should be either 150 mm, 200 mm or 250

43、mm. 9.3 The nominal mass of balls and of spools shall be subject to a tolerance of 8 %. 9.4 When the twines are supplied by mass, the gross mass shall not differ from that ordered by more than 4 % for nominal ordered quantities of 1 000 kg and less and by more than 3 % for above 1 000 kg. The invoic

44、ed mass shall be the actual gross mass of the twine obtained by weighing.BS EN 12423:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |

45、 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated b

46、y Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone findin

47、g an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which

48、ensures that subscribers automatically receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001. In response to orders for international standards,

49、it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: 020 8996 7111. Fax: 020 8996 7048. Subscribing members of