1、December 2014 Translation by DIN-Sprachendienst.English price group 11No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).I
2、CS 85.060!%4L“2271741www.din.deDDIN EN ISO 2758Paper Determination of bursting strength (ISO 2758:2014);English version EN ISO 2758:2014,English translation of DIN EN ISO 2758:2014-12Papier Bestimmung der Berstfestigkeit (ISO 2758:2014);Englische Fassung EN ISO 2758:2014,Englische bersetzung von DIN
3、 EN ISO 2758:2014-12Papier Dtermination de la rsistance lclatement (ISO 2758:2014);Version anglaise EN ISO 2758:2014,Traduction anglaise de DIN EN ISO 2758:2014-12SupersedesDIN EN ISO 2758:2003-11www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document co
4、mprises 20 pages11.14 DIN EN ISO 2758:2014-12 2 A comma is used as the decimal marker. National 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” (Secretari
5、at: DIN, Germany). The responsible German body involved in its preparation was the DIN-Normenausschuss Papier, Pappe und Faserstoff (DIN Standards Committee Paper, Board and Pulps), Working Committee NA 074-02-03 AA Physi-kalisch-technische Prfverfahren fr Papier und Pappe. The DIN Standards corresp
6、onding to the International Standards referred to in Clause 2 of this standard are as follows: ISO 186 DIN EN ISO 186 ISO 187 DIN EN 20187 ISO 536 DIN EN ISO 536 Users of this standard should take note of the following: During a routine review of the standard, ISO/TC 6 “Paper, board and pulps” deter
7、mined that some minor editorial changes were necessary. A validation of the method and its results by means of precision data was also deemed desirable. For the sake of simplicity, the results of interlaboratory tests carried out and evaluated in 2012 by CEPI (Confederation of European Paper Industr
8、ies) have been used as precision data (see Annex E). Because precision data are not normative specifications, and because all other changes made to this standard are solely editorial in nature, ISO/TC 6 had decided to make the fourth edition of ISO 2758 a “minor revision”. Amendments This standard d
9、iffers from DIN EN ISO 2758:2003-11 as follows: a) Annex E (informative) “Precision” has been added; b) the standard has been editorially revised. Previous editions DIN ISO 2758: 1986-12 DIN EN ISO 2758: 2003-11 DIN EN ISO 2758:2014-12 3 National Annex NA (informative) Bibliography DIN EN 20187, Pap
10、er, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples DIN EN ISO 186, Paper and board Sampling to determine average quality DIN EN ISO 536, Paper and board Determination of grammage DIN EN ISO 2758:2014-12 4 This
11、page is intentionally blank EN ISO 2758August 2014 ICS 85.060 Supersedes EN ISO 2758:2003English Version Paper - Determination of bursting strength (ISO 2758:2014) Papier - Dtermination de la rsistance lclatement(ISO 2758:2014)Papier - Bestimmung der Berstfestigkeit (ISO 2758:2014) This European Sta
12、ndard 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 national standard without any alteration. Up-to-date lists and bibliographical references concerning s
13、uch 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 version in any other language made by translation under the responsibility of a CEN member into its o
14、wn 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, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,
15、 Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitat
16、ion in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 2758:2014 EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMContents Page Foreword . 3 Introduction . 4 1 Scop
17、e . 5 2 Normative references. 5 3 Terms and definitions 5 4 Principle 5 5 Apparatus 5 6 Calibration . 6 7 Sampling and preparation of test pieces . 7 8 Procedure 7 9 Expression of results . 8 10 Test report . 8 Annex A (normative) Dimensions of the clamping system . 9 Annex B (normative) Testing the
18、 clamps 11 Annex C (normative) Clamping pressure 12 Annex D (normative) Calibration of pressure-measuring system 13 Annex E (informative) Precision . 14 Bibliography 16 2DIN EN ISO 2758:2014-12 EN ISO 2758:2014 (E) Foreword This document (EN ISO 2758:2014) has been prepared by Technical Committee IS
19、O/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 Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest b
20、y 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 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 suc
21、h patent rights. This document supersedes EN ISO 2758:2003. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
22、 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 the United Kingdom. Endorsement notice The text
23、 of ISO 2758:2014 has been approved by CEN as EN ISO 2758:2014 without any modification. 3DIN EN ISO 2758:2014-12EN ISO 2758:2014 (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
24、 or greater than 350 kPa (or 250 kPa for the components of combined materials), an alternative method, based on similar principles, 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 ove
25、rlap between the method for testing papers and boards and in the absence of any commercial agreement, materials below 600 kPa 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
26、of ISO 2759 and this International Standard will not necessarily give the same results.4DIN EN ISO 2758:2014-12 EN ISO 2758:2014 (E) 1 ScopeThis International Standard specifies a method for measuring the bursting strength of paper submitted to increasing hydraulic pressure. It is applicable to pape
27、r having bursting strengths within the range 70 kPa to 1 400 kPa. 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
28、be used for testing the material, materials with bursting strengths 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 d
29、ated references, only the edition cited applies. For undated references, 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
30、 procedure for monitoring the atmosphere and conditioning of samplesISO 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
31、an elastic diaphragm through a circular area of the paper when 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
32、, divided by the grammage of the paper determined in accordance 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
33、piece ruptures. The bursting strength of the test piece is the maximum value of the applied hydraulic pressure.5 ApparatusThe apparatus shall contain, as a minimum, the features described in 5.1 to 5.4.5DIN EN ISO 2758:2014-12EN ISO 2758:2014 (E)5.1 Clamping system, for clamping the test piece firml
34、y 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 pr
35、essure 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 appl
36、ying 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
37、 should 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
38、mm 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 p
39、lane 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 gene
40、rated 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
41、from 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 ri
42、sing 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 chec
43、king 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
44、. 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. 6DIN EN ISO 2758:2014-12 EN ISO 2758:2014 (E) If a pressure sensor is accidentally subjected to pressure bey
45、ond 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 under stress is
46、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. If the determina
47、tion 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 test pieces requ
48、ired 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 requi
49、red, 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 require a “warm-up” period.Where alternative measuring pressure ranges are available, select the most suitable range, if necessary by carrying out a preliminary test using the highest available range.Adjust the clamping system to give a
