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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 twines Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard,
3、 having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published 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.DateComme
4、nts National foreword This British Standard is the English language version of EN 12423:1999. The UK participation 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 responsibl
5、e European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests 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 secret
6、ary. Cross-references The British Standards which implement international or European publications referred 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 Elec
7、tronic Catalogue. 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 of itself confer immunity from legal obligations. Summary of pages This d
8、ocument comprises a front cover, an inside front cover, the EN title page, pages 2 to 7 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:56 GMT+00:00 2006, Uncontrolled Copy
9、, (c) BSI EUROPEAN STANDARD EN 12423 NORME EUROPENNE EUROPISCHE NORMApril 1999 ICS 59.080.20 English version Polypropylene twines Ficelles polypropylnePolypropylen-Bindegarne This European Standard was approved by CEN on 1 April 1999. CEN members are bound to comply with the CEN/CENELEC Internal Reg
10、ulations 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 standards may be obtained on application to the Central Secretariat or to any CEN member. This
11、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 the Central Secretariat has the same status as the official versions. CEN members are the
12、national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europ
13、isches 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 12423:1999 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:56 GMT+00:00 2006, Unc
14、ontrolled Copy, (c) BSI Page 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 pub
15、lication of an 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 impleme
16、nt this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:56 GMT+00:00 200
17、6, Uncontrolled Copy, (c) BSI Page 3 EN 12423:1999 BSI 09-1999 1 Scope This European Standard specifies requirements for twines made from polypropylene. It specifies the methods for their manufacture, their physical characteristics, as well as describing test methods to verify these characteristics.
18、 This standard allows ultra violet light inhibitors to be added but does not require them to be added. Requirements for the 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
19、906:1996. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the cited publications are listed hereafter. For dated references, subsequent amendme
20、nts to, or revisions of, any of these publications apply to this standard only when incorporated in it by amendment or revision. 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
21、10002-2, Metallic materials Tensile testing Part 2: Verification of the force measuring system of the tensile testing machines. EN 919:1995, Fibre ropes for general service Determination of certain physical and mechanical properties. EN 906:1996, Polyolefin agricultural twines. 3 Terms and definitio
22、ns For the purposes of this European Standard, the following terms and definitions apply. 3.1 twine product made from a single 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 colou
23、ring matter to the polypropylene before extrusion to provide a finished twine of a defined shade 3.4 batch definite quantity 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 max
24、imum tensile force that the twine can withstand when tested Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 12423:1999 BSI 09-1999 3.7 minimum breaking force nominal breaking force which at least has to be achieved during the singl
25、e 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 selection of all samples of one lot/production quantity for laboratory tests
26、 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) the colour; g) the number of this standard. Example of designation: a
27、 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 made from mechanically fibrillated polypropylene film tapes in order to
28、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 twine s resistance against ultra violet rays. 5.3 Each spool or ball of twine shall be continuous throu
29、ghout 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. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 12423:1999 BSI 09-1999 6 Mai
30、n requirements of polypropylene twines When tested in accordance with clause 7 twines shall meet the requirements of Table 1. Table 1 Main requirements of polypropylene twines Linear density1) of twineLinear density of single plyMinimum breaking forceMaximum elongation at rupture tex2) Single ply2 p
31、ly3 plySingle ply 2 ply3 ply ToleranceToleranceEquivalentdaNdaNdaN% 8 %6 %6 %8 %metric number texm/kgtexm/kgtexm/kgtexm/kg 6 670 1500,15221 4 440 2250,225148 3 330 30010 190 983 3303000,311133920 2 000 500 6 1201632 0005000,56620420 1 430 6992 920342 4 3702291 4306990,7489714520 1 0001 0002 040490 3
32、 0603271 0001 0001336710220 7151 3991 450699 2 170461 7151 3991,423487220 5002 0001 020980 1 530654 5002 0002345120 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 7.1 Sampling 7.1.1 The number of sample
33、s 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 11 1 and 2,52 2,5 and 53 5 and 104 105 7.1.3 T
34、he 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 = Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:56 GMT+00:00 2006, Uncontrolled Copy, (c)
35、 BSI Page 6 EN 12423:1999 BSI 09-1999 7.2 Conditioning 7.2.1 The 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 humi
36、dity of (65 2) %, before continuing with the tests. 7.3 Determination 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 th
37、e unitary system appropriate for the product. NOTE Expression of 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 ac
38、curacy of 2 %. The testing machine shall be within its period of 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 mach
39、ine by means of appropriate grips which have been designed for 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
40、 length in millimetres of the specimen between the grips as defined 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
41、 or exceed those values quoted for the twine in Table 1. 7.4.8 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. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 16:00:56 GMT+00:00 2006,
42、Uncontrolled Copy, (c) BSI 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 European Standard; b) test report reference; c) reference of the twine stated in this standard (description of the material); d) l
43、inear densities obtained for the specimen; e) individual breaking forces obtained for the specimen; f) average breaking forces obtained from the specimen; g) any operating details and details of any incident liable to have an effect upon the results; h) date of the report, name, title, and signature
44、 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 securely made up into packages as ordered. NOTE 1 When the twines are supplied in ball, the recommended masses should be 100 g, 250 g, 5
45、00 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 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,
46、 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 invoiced mass shall be the actual gross mass of the twine obtained by weighing. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28
47、16:00:56 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12423:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
48、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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 by Royal Charter. Revi
49、sions 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 finding 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
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