1、BSI Standards PublicationBS EN ISO 2759:2014Board Determination ofbursting strengthBS EN ISO 2759:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 2759:2014.It supersedes BS EN ISO 2759:2003 which is withdrawn.The UK participation in its preparation was
2、entrusted to TechnicalCommittee PAI/11, Methods of test for paper, board and pulps.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its co
3、rrectapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 78155 1ICS 85.060Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy
4、Committee on 31 July 2014.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2759 July 2014 ICS 85.060 Supersedes EN ISO 2759:2003English Version Board - Determination of bursting strength (ISO 2759:2014) Carton - Dtermination de la rsistanc
5、e lclatement (ISO 2759:2014) Pappe - Bestimmung des Berstdruckes (ISO 2759:2014) This European Standard was approved by CEN on 24 May 2014. 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 natio
6、nal standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A vers
7、ion in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, C
8、zech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
9、 EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2759:20
10、14 EBS EN ISO 2759:2014EN ISO 2759:2014 (E) 3 Foreword This document (EN ISO 2759:2014) has been prepared by Technical Committee ISO/TC 6 “Paper, board and pulps“ in collaboration with Technical Committee CEN/TC 172 “Pulp, paper and board” the secretariat of which is held by DIN. This European Stand
11、ard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2015, and conflicting national standards shall be withdrawn at the latest by January 2015. Attention is drawn to the possibility that some of the elements of t
12、his 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 2759:2003. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countr
13、ies are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pola
14、nd, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 2759:2014 has been approved by CEN as EN ISO 2759:2014 without any modification. BS EN ISO 2759:2014ISO 2759:2014(E) ISO 2014 All rights reserved iiiContents PageF
15、oreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 15 Apparatus . 26 Calibration 37 Sampling and preparation of test pieces . 38 Procedure. 39 Expression of results 410 Test report . 4Annex A (normative) Dimensions of the clamping system . 6Annex B (nor
16、mative) Testing the clamps . 8Annex C (normative) Clamping pressure . 9Annex D (normative) Calibration of pressure-measuring system 10Annex E (informative) Precision 11Bibliography .13BS EN ISO 2759:2014ISO 2759:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide f
17、ederation 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 subject for which a technical committee has been established has the right to be represented on that co
18、mmittee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document
19、and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, P
20、art 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of
21、the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific te
22、rms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 6, Paper, board and pulps,
23、 Subcommittee SC 2, Test methods and quality specifications for paper and board.This fourth edition cancels and replaces the third edition (ISO 2759:2001), of which it constitutes a minor revision to include precision data.iv ISO 2014 All rights reservedBS EN ISO 2759:2014ISO 2759:2014(E)Introductio
24、nThis International Standard is applicable to boards with bursting strengths between 350 kPa (or 250 kPa for the components of combined materials) and 5 500 kPa. All components of solid and corrugated fibreboard, irrespective of bursting strength, should be tested by this International Standard.For
25、materials with bursting strengths less than 1 400 kPa, an alternative method, based on similar principles, is specified in ISO 27581.NOTE Due to differences in the specification of the apparatus, tests made on the same material using the procedures of ISO 2758 and this International Standard will no
26、t necessarily give the same results. ISO 2014 All rights reserved vBS EN ISO 2759:2014BS EN ISO 2759:2014Board Determination of bursting strength1 ScopeThis International Standard specifies a method for measuring the bursting strength of board submitted to increasing hydraulic pressure. It is applic
27、able to all types of board (including corrugated and solid fibreboard) having bursting strengths within the range 350 kPa to 5 500 kPa. It is also applicable to papers or boards having bursting strengths as low as 250 kPa if the paper or board is to be used to prepare a material of higher bursting s
28、trength, such as corrugated board. In such cases, the measurements will not necessarily have the accuracy or precision stated for this method and it is necessary to include a note in the test report stating that the test gave results that were below the minimum value required by the method.In the ab
29、sence of any commercial agreement as to which method should be used for materials with bursting strengths between 350 kPa and 1 400 kPa, all materials with bursting strengths below 600 kPa, except components of solid and corrugated fibreboard, should be tested by ISO 2758 and the remainder by this I
30、nternational Standard.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document
31、 (including any amendments) applies.ISO 186, Paper and board Sampling to determine average qualityISO 187, Paper, board and pulps St andard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samplesISO 536, Paper and board De termination of gramma
32、ge3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1bursting strengthmaximum pressure developed by the hydraulic system in forcing an elastic diaphragm through a circular area of the board when the pressure is applied in the manner described in th
33、e methodNote 1 to entry: The indicated bursting pressure includes the pressure required to extend the diaphragm during the test.3.2burst indexbursting strength of the board divided by the grammage of the board determined in accordance with ISO 5364 PrincipleA test piece, placed over a circular elast
34、ic diaphragm, is rigidly clamped at the periphery but free to bulge with the diaphragm. Hydraulic fluid is pumped at a constant rate, bulging the diaphragm until the test piece ruptures. The bursting strength of the test piece is the maximum value of the applied hydraulic pressure.INTERNATIONAL STAN
35、DARD ISO 2759:2014(E) ISO 2014 All rights reserved 1BS EN ISO 2759:2014ISO 2759:2014(E)5 ApparatusThe apparatus shall contain, as a minimum, the features described in 5.1 to 5.4.5.1 Clamping system, for clamping the test piece firmly and uniformly between two annular, plane, parallel surfaces which
36、shall be smooth (but not polished) and grooved as described in Annex A, which also gives the dimensions of the clamping system.One clamping plate shall be held in a swivel joint or similar device so as to ensure that the clamping pressure is distributed evenly.Under the load used for testing, the ci
37、rcular openings in the two clamping plates shall be concentric to within 0,25 mm and the clamping surfaces shall be flat and parallel. The method of checking the clamps is given in Annex B.The clamping system shall be capable of applying a clamping pressure in the range 700 kPa to 1 200 kPa and shal
38、l be constructed in such a way that repeatable clamping pressures can be obtained in use (see Annex C).In calculating the clamping pressure, the reduction in area due to the grooves shall be ignored.Any clamping-pressure-indicating device fitted should preferably be scaled to indicate the actual cla
39、mping pressure, not the pressure in the clamping system itself. The clamping pressure may be calculated from clamping-force and clamp-area information.5.2 Diaphragm, circular, of natural or synthetic rubber, free from filler or loading, clamped securely with its outer surface, when at rest, recessed
40、 about 5,5 mm relative to the outer plane of the diaphragm-mounting plate.The material and construction of the diaphragm shall be such that the pressures required to bulge the diaphragm outside the outer plane of the diaphragm plate are as follows: bulge height: 10 mm 0,2 mm, pressure range: 170 kPa
41、 to 220 kPa; bulge height: 18 mm 0,2 mm, pressure range: 250 kPa to 350 kPa.Diaphragms in use shall be regularly checked and changed if the bulge-height requirements are no longer met.5.3 Hydraulic system, to apply an increasing hydraulic pressure to the inside of the diaphragm until the test piece
42、bursts.The pressure shall be generated by a motor-driven piston forcing a suitable liquid (e.g. pure glycerol, ethylene glycol containing corrosion inhibitor or low viscosity silicone oil) which is compatible with the diaphragm material against the inner surface of the diaphragm. The hydraulic syste
43、m and the fluid used shall be free from air bubbles. The pumping rate shall be 170 ml/min 15 ml/min.5.4 Pressure-measuring system, to measure bursting strength.It may employ any principle which produces a measurement and display accuracy equal to 10 kPa or 3 % of the measurement, whichever is the gr
44、eater. The rate of response to the rising hydraulic pressure shall be such that the indicated maximum pressure is within 3 % of the true peak pressure as determined by a calibration system of the type described in Annex D.2 ISO 2014 All rights reservedBS EN ISO 2759:2014ISO 2759:2014(E)6 Calibration
45、6.1 The apparatus should be fitted, or able to be fitted, with suitable test points to facilitate checking of the fluid pumping rate, calibration of the maximum pressure-measurement and display system and calibration of the clamping pressure-indicating device where fitted.6.2 Calibration shall be ca
46、rried out before initial use and at sufficiently frequent intervals to maintain the specified accuracy. Wherever possible, calibration of the pressure-sensing device should be carried out with it mounted in the same position it occupies on the apparatus and preferably on the apparatus itself. If a p
47、ressure sensor is accidentally subjected to pressure beyond its rated capacity, it shall be recalibrated before further use.Aluminium foils of various thicknesses may be available for use as test pieces of known burst value. Such devices are a useful means of checking the overall function of an inst
48、rument but, since the behaviour of foil under stress is unlike that of paper, they should not be used as calibration standards.7 Sampling and preparation of test piecesThe sampling procedure is not covered by this International Standard. Make sure that the test pieces taken for the determination are
49、 representative of the sample received. If the determination is to represent a lot of board, the sampling procedure shall be carried out in accordance with ISO 186. Where possible, test pieces shall not include areas containing watermarks, creases or visible damage.Test pieces shall be conditioned in accordance with ISO 187.The number of test pieces required depends on whether or not separate results are required for burst tests carried out with each surface in contact with the diaphragm.8 ProcedureTests shall be carried out in the s
