1、BSI Standards PublicationBS EN ISO 2758:2014Paper Determination ofbursting strengthBS EN ISO 2758:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 2758:2014.It supersedes BS EN ISO 2758:2003 which is withdrawn.The UK participation in its preparation was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 78154 4ICS 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 August 2014.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 2758 August 2014 ICS 85.060 Supersedes EN ISO 2758:2003English Version Paper - Determination of bursting strength (ISO 2758:2014) Papier - Dtermination de la rsis
5、tance lclatement (ISO 2758:2014) Papier - Bestimmung des Berstdruckes (ISO 2758:2014) This European Standard was approved by CEN on 14 June 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
6、 national 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).
7、A version 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, Cyp
8、rus, Czech 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 Ki
9、ngdom. 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 2
10、758:2014 EBS EN ISO 2758:2014EN ISO 2758:2014 (E) 3 Foreword This document (EN ISO 2758:2014) 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
11、 Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2015, and conflicting national standards shall be withdrawn at the latest by February 2015. Attention is drawn to the possibility that some of the eleme
12、nts 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 2758:2003. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the followin
13、g countries 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, Norw
14、ay, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 2758:2014 has been approved by CEN as EN ISO 2758:2014 without any modification. BS EN ISO 2758:2014ISO 2758:2014(E) ISO 2014 All rights reserved iiiConten
15、ts PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 15 Apparatus . 16 Calibration 27 Sampling and preparation of test pieces . 38 Procedure. 39 Expression of results 410 Test report . 4Annex A (normative) Dimensions of the clamping system . 5Anne
16、x B (normative) Testing the clamps . 7Annex C (normative) Clamping pressure . 8Annex D (normative) Calibration of pressure-measuring system . 9Annex E (informative) Precision 10Bibliography .12BS EN ISO 2758:2014ISO 2758:2014(E)ForewordISO (the International Organization for Standardization) is a wo
17、rldwide 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 subject for which a technical committee has been established has the right to be represented o
18、n 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 Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this
19、document 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 Dire
20、ctives, Part 2. www.iso.org/directivesAttention 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
21、of the document will be in the Introduction and/or on the ISO list of patent declarations received. www.iso.org/patentsAny 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 terms
22、 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, Su
23、bcommittee SC 2, Test methods and quality specifications for paper and board.This fourth edition cancels and replaces the third edition (ISO 2758:2001), of which it constitutes a minor revision. It has been revised to include precision data.iv ISO 2014 All rights reservedBS EN ISO 2758:2014ISO 2758:
24、2014(E)IntroductionThis International Standard is applicable to papers with bursting strengths in the range 70 kPa to 1 400 kPa.For materials with bursting strengths equal to or greater than 350 kPa (or 250 kPa for the components of combined materials), an alternative method, based on similar princi
25、ples, is specified in ISO 27591All components of solid and corrugated fibreboard, irrespective of bursting strength, should be tested according to ISO 2759.In view of the overlap between the method for testing papers and boards and in the absence of any commercial agreement, materials below 600 kPa
26、should be tested according to this International Standard.NOTE Due to differences in the specification of the apparatus, tests made on the same material using the procedures of ISO 2759 and this International Standard will not necessarily give the same results. ISO 2014 All rights reserved vBS EN IS
27、O 2758:2014BS EN ISO 2758:2014Paper Determination of bursting strength1 ScopeThis International Standard specifies a method for measuring the bursting strength of paper submitted to increasing hydraulic pressure. It is applicable to paper having bursting strengths within the range 70 kPa to 1 400 kP
28、a. It is not intended to be used for the components (such as fluting medium or linerboard) of a combined board, for which the method given in ISO 27591is more suitable.In the absence of any commercial agreement as to which method should be used for testing the material, materials with bursting stren
29、gths below 600 kPa should be tested according to this International 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 re
30、ferences, the latest edition of the referenced document (including any amendments) applies.ISO 186, Paper and board Sampling to determine average qualityISO 187, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of sa
31、mplesISO 536, Paper and board Determination of grammage3 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 paper when
32、the pressure is applied in the manner described in the methodNote 1 to entry: The indicated bursting pressure includes the pressure required to extend the diaphragm during the test.3.2burst indexbursting strength of paper, in kilopascals, divided by the grammage of the paper determined in accordance
33、 with ISO 5364 PrincipleA test piece, placed over a circular elastic 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
34、maximum value of the applied hydraulic pressure.5 ApparatusThe apparatus shall contain, as a minimum, the features described in 5.1 to 5.4.INTERNATIONAL STANDARD ISO 2758:2014(E) ISO 2014 All rights reserved 1BS EN ISO 2758:2014ISO 2758:2014(E)5.1 Clamping system, for clamping the test piece firmly
35、and uniformly between two annular, plane, parallel surfaces which 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 pres
36、sure is distributed evenly.Under the load used for testing, the circular openings in the two clamping faces 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 applyi
37、ng a known clamping pressure up to 1 200 kPa and shall 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 s
38、hould preferably be scaled to indicate the actual clamping 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 and 0,86 mm
39、 0,06 mm thick, clamped securely with its outer surface, when at rest, recessed about 3,5 mm relative to the outer plane of the diaphragm-mounting plate.The material and construction of the diaphragm shall be such that the pressure required to bulge the diaphragm 9,00 mm 0,2 mm outside the outer pla
40、ne of the diaphragm plate is 30 kPa 5 kPa. Diaphragms in use shall be regularly checked and changed if the bulge-height requirement is no longer met.5.3 Hydraulic system, to apply an increasing hydraulic pressure to the inside of the diaphragm until the test piece bursts.The pressure shall be genera
41、ted by a motor-driven piston forcing a suitable liquid (e.g. pure glycerol, low viscosity silicone oil, ethylene glycol containing corrosion inhibitor) which is compatible with the diaphragm material against the inner surface of the diaphragm. The hydraulic system and the fluid used shall be free fr
42、om air bubbles. The pumping rate shall be 95 ml/min 5 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 greater. The rate of response to the risi
43、ng 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.6 Calibration6.1 The apparatus should be fitted, or able to be fitted, with suitable test points to facilitate checki
44、ng 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 carried out before initial use and at sufficiently frequent intervals to maintain the specified accuracy.
45、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. 2 ISO 2014 All rights reservedBS EN ISO 2758:2014ISO 2758:2014(E)If a pressure sensor is accidentally subjecte
46、d 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 instrument but, since the behaviour of foil
47、 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 representative of the sample received.
48、 If the determination is to represent a lot of paper, 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
49、 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 standard atmosphere, defined in ISO 187, used for the conditioning of test pieces in accordance with Clause 7.If required, determine the grammage in accordance with ISO 536.Prepare the apparatus for use in accordance with the manufacturers instructions and the requirements of this International Standard. Electronic instruments may requ
