DIN EN ISO 535-2014 Paper and board - Determination of water absorptiveness - Cobb method (ISO 535 2014) German version EN ISO 535 2014《纸和纸板 吸水性测定 Cobb法》.pdf

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1、June 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).ICS 8

2、5.060!%2qL“2157841www.din.deDDIN EN ISO 535Paper and board Determination of water absorptiveness Cobb method (ISO 535:2014);English version EN ISO 535:2014,English translation of DIN EN ISO 535:2014-06Papier und Pappe Bestimmung des Wasserabsorptionsvermgens Cobb-Verfahren (ISO 535:2014);Englische F

3、assung EN ISO 535:2014,Englische bersetzung von DIN EN ISO 535:2014-06Papier et carton Dtermination de labsorption deau Mthode de Cobb (ISO 535:2014);Version anglaise EN ISO 535:2014,Traduction anglaise de DIN EN ISO 535:2014-06SupersedesDIN EN 20535:1994-09www.beuth.deDocument comprises 16 pagesIn

4、case of doubt, the German-language original shall be considered authoritative.05.14 DIN EN ISO 535:2014-06 2 A comma is used as the decimal marker. National foreword This document (EN ISO 535:2014) has been prepared by Technical Committee ISO/TC 6/SC 2 “Test methods and quality specifications for pa

5、per and board” in collaboration with Technical Committee CEN/TC 172 “Pulp, paper and board” (Secretariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Papier, Pappe und Faserstoff (Paper, Board and Pulps Standards Committee), Working Committee NA 074

6、-02-03 AA Physikalisch-technische Prfverfahren fr Papier und Pappe. Users of this standard should take note of the following: During a routine review of the standard, ISO/TC 6 “Paper, board and pulps” determined that some minor editorial changes were necessary. A validation of the method and its res

7、ults 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 Industries) have been used as precision data (see Annex A). Because precision data are not normative

8、specifications, and because all other changes made to this standard are solely editorial in nature, ISO/TC 6 had decided to make the third edition of ISO 535 a “minor revision”. The DIN Standards corresponding to the International Standards referred to in Clause 2 of this standard are as follows: IS

9、O 186 DIN EN ISO 186 ISO 187 DIN EN 20187 ISO 5269-1 DIN EN ISO 5269-1 Amendments This standard differs from DIN EN 20535:1994-09 as follows: a) a table of contents has been added; b) the NOTE in Subclause 5.1 has been integrated in the normative text; c) Annex A (informative) “Precision” has been a

10、dded; d) the standard has been editorially revised. Previous editions DIN 53132: 1965-11, 1981-10 DIN EN 20535: 1994-09 DIN EN ISO 535:2014-06 3 National Annex NA (informative) Bibliography DIN EN ISO 186, Paper and board Sampling to determine average quality DIN EN ISO 5269-1, Pulps Preparation of

11、laboratory sheets for physical testing Part 1: Conventional sheet-former method DIN EN 20187, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples DIN EN ISO 535:2014-06 4 This page is intentionally blank EURO

12、PEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 535 February 2014 ICS 85.060 Supersedes EN 20535:1994English Version Paper and board - Determination of water absorptiveness -Cobb method (ISO 535:2014) Papier et carton - Dtermination de labsorption deau - Mthode de Cobb (ISO 535:2014) Papier und

13、 Pappe - Bestimmung des Wasserabsorptionsvermgens - Cobb-Verfahren(ISO 535:2014) This European Standard was approved by CEN on 23 December 2013. 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

14、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). A

15、 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, Cypr

16、us, 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 Kin

17、gdom. 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 53

18、5:2014 EContents PageForeword 3Introduction 41 Scope . 52 Normative references 53 Terms and definitions . 54 Principle 55 Reagents and materials . 56 Apparatus . 67 Sampling 68 Conditioning 69 Preparation of test pieces . 610 Procedure. 710.1 Mounting of the test piece . 710.2 Exposure to water and

19、blotting 710.3 Times of test 710.4 Rejection of test pieces . 811 Expression of results 812 Test report . 9Annex A (informative) Precision 10Bibliography . 12DIN EN ISO 535:2014-06 EN ISO 535:2014 (E) 2 DIN EN ISO 535:2014-06 EN ISO 535:2014 (E) Foreword This document (EN ISO 535:2014) has been prep

20、ared 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 Standard shall be given the status of a national standard, either by publication of an identical text or b

21、y endorsement, at the latest by August 2014, and conflicting national standards shall be withdrawn at the latest by August 2014. 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

22、identifying any or all such patent rights. This document supersedes EN 20535:1994. 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 Repu

23、blic, 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 the United Kingdom. Endo

24、rsement notice The text of ISO 535:2014 has been approved by CEN as EN ISO 535:2014 without any modification. 3 IntroductionThe test described in this International Standard permits the determination of the quantity of water that can be absorbed by the surface of paper or board in a given time. Wate

25、r absorptiveness is a function of various paper and board characteristics such as sizing, porosity, etc.DIN EN ISO 535:2014-06 EN ISO 535:2014 (E) 4 1 ScopeThis International Standard specifies a method of determining the water absorptiveness of sized paper and board, including corrugated fibreboard

26、, under standard conditions. It may not be suitable for paper of grammage less than 50 g/m2or embossed paper. It is not suitable for porous papers such as newsprint or unsized papers such as blotting paper or other papers having a relatively high water absorptiveness for which ISO 87872is more suita

27、ble.This method is not intended to be used for precise evaluation of the writing properties of paper although it does give a general indication of suitability for use with aqueous inks.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and

28、 are indispensable for its application. For dated 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 Standar

29、d atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samplesISO 5269-1, Pulps Preparation of laboratory sheets for physical testing Part 1: Conventional sheet-former method3 Terms and definitionsFor the purposes of this document, the following ter

30、ms and definitions apply.3.1water absorptiveness (Cobb value)calculated mass of water absorbed in a specified time by 1 m2of paper or board under specified conditionsNote 1 to entry: The test area is normally 100 cm2.4 PrincipleA test piece is weighed immediately before and immediately after exposur

31、e for a specified time of one surface to water, followed by blotting. The result of the increase in mass is expressed in grams per square metre (g/m2).5 Reagents and materials5.1 Water, distilled or deionized. The temperature of the water is important and should be maintained during the test at the

32、temperature used for conditioning and testing.5.2 Blotting paper, having a grammage of 250 g/m2 25 g/m2. Pulp evaluation blotters are acceptable for the purposes of this International Standard (see ISO 5269-1).DIN EN ISO 535:2014-06 EN ISO 535:2014 (E) 5 6 Apparatus6.1 Absorptiveness tester for the

33、determination of water absorptiveness.Any type of apparatus may be used which permits an immediate and uniform contact of the water with the part of the test piece submitted to the test; controlled rapid removal of the unabsorbed water from the test piece at the end of the contact period; and the ra

34、pid removal of the test piece without the risk of contact with water outside the test area.In its simplest form, the apparatus consists of a rigid base with a smooth, planar surface, and a rigid metal cylinder of 112,8 mm 0,2 mm internal diameter (corresponding to a test area approximately 100 cm2)

35、and with a means of clamping it firmly to the base plate. The edge of the cylinder in contact with the test piece shall be flat and machined smooth with a thickness sufficient to prevent the cylinder cutting into the test piece. The height of the cylinder is not important provided it is sufficient t

36、o contain a water depth of 10 mm.NOTE 1 For materials where leakage between the cylinder and the upper surface of the test piece may occur during the test, a soft, elastic, non-absorbent gasket may be interposed to prevent this. This gasket should have the same internal diameter as the cylinder afte

37、r clamping.NOTE 2 To prevent damage to the machined edge of the cylinder caused by clamping it upside down it is advisable to mark the top in some way so that it can be identified readily.NOTE 3 If a cylinder of a small area is used it is recommended that this should not be less than 50 cm2. The wat

38、er depth must still be 10 mm.6.2 Metal roller, with a smooth face, 200 mm wide, a diameter of 90 mm 10 mm and a mass of 10 kg 0,5 kg.6.3 Balance, with an accuracy of 1 mg.6.4 Timer, reading in seconds and capable of timing up to at least 30 min.6.5 Graduated cylinder, or other means of measuring app

39、ropriate aliquots.7 SamplingIf the tests are being made to evaluate a lot, the sample shall be selected in accordance with ISO 186. If the tests are made on another type of sample, make sure that the specimens taken are representative of the sample received.8 ConditioningCondition the specimens as s

40、pecified in ISO 187. Keep them in the conditioning atmosphere throughout the test.9 Preparation of test piecesPrepare the test pieces in the same atmospheric conditions used to condition the specimens. Avoid contact of the test area with hands or fingers, cut from the specimens at least 10 test piec

41、es of sufficient DIN EN ISO 535:2014-06 EN ISO 535:2014 (E) 6 size to exceed the diameter of the cylinder by at least 10 mm from any edge, ensuring that the test area is free from visible folds, creases, cracks or other defects.NOTE For normal apparatus (see 6.1) a width of about 125 mm is suitable.

42、If watermarks are present, these areas should be avoided if possible. When the specimens available are too small to allow the normal apparatus to be used, a smaller test area may be agreed upon between the interested parties and depending on the corresponding equipment availability.10 ProcedureCarry

43、 out the test in the same atmospheric conditions used to condition the specimens (see Clause 8).10.1 Mounting of the test pieceEnsure that the upper surface of the base plate and the edge of the cylinder which will come in contact with the test piece are dry before commencing each test.Weigh the tes

44、t piece to the nearest 1 mg and place it with the surface to be tested uppermost on the base plate. Place the cylinder with the machined edge in contact with the test piece and clamp sufficiently firmly to prevent any leakage of water between it and the test piece.10.2 Exposure to water and blotting

45、For the purposes of this International Standard, the time of test is defined as the time between the moment the water first contacts the test piece and the commencement of blotting.Pour 100 ml 5 ml of water (5.1) or proportionately less for a smaller test area, into the cylinder, thus providing a he

46、ad of 10 mm and start the timer (6.4) immediately. Use new water for each determination.The test procedure for any selected exposure time should, where possible, conform to the conditions summarized in 10.3, the exposure time being selected according to the water absorptiveness of the paper and boar

47、d under consideration. If, for example, a test time of 60 s has been selected, pour off the excess water after 45 s (see Table 1), taking care that no water comes into contact with the surface of the test piece outside the test area. Quickly unclamp the cylinder and remove it. Remove the test piece and place it, test face uppermost, on a sheet of dry blotting paper (5.2) previously placed on a flat rigid surface.