1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 5270:2012Pulps Laboratory sheets Determination of physical propertiesBS EN ISO 5270:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation
2、 of EN ISO 5270:2012. It supersedes BS EN ISO 5270:2000, which is withdrawn.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e P A I / 1 1 , M e t h o d s o f t e s t f o r p a p e r , b o a r d and pulps.A list of organizations represented on this committee
3、 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI Standards Limited 2012.ISBN 978 0 580 71013 1 ICS 85.040 C
4、ompliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2012.Amendments issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE E
5、UROPISCHE NORM EN ISO 5270 October 2012 ICS 85.040 Supersedes EN ISO 5270:1999English Version Pulps - Laboratory sheets - Determination of physical properties (ISO 5270:2012) Ptes - Feuilles de laboratoire - Dtermination des proprits physiques (ISO 5270:2012) Faserstoff - Laborbltter- Bestimmung der
6、 physikalischen Eigenschaften (ISO 5270:2012) This European Standard was approved by CEN on 30 September 2012. 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 alte
7、ration. 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 version in any other language mad
8、e 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, Czech Republic, Denmark, Eston
9、ia, 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. EUROPEAN COMMITTEE FOR STAND
10、ARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 5270:2012: EBS EN ISO 5270:2012EN ISO 5270:2012
11、(E) 3 Foreword This document (EN ISO 5270:2012) 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 Standard shall be given the status of a natio
12、nal standard, either by publication of an identical text or by endorsement, at the latest by April 2013, and conflicting national standards shall be withdrawn at the latest by April 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent ri
13、ghts. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 5270:1999. According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Sta
14、ndard: 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, Poland, Portugal, Romania, Slovakia, Slovenia, S
15、pain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 5270:2012 has been approved by CEN as a EN ISO 5270:2012 without any modification. BS EN ISO 5270:2012ISO 5270:2012(E) ISO 2012 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope 12 Normati
16、ve references . 13 Principle . 24 Apparatus 25 Trimmed laboratory sheets . 25.1 Selection of laboratory sheets . 25.2 Conditioning of laboratory sheets 25.3 Optical properties 35.4 Determination of grammage, bulking thickness and apparent bulk density 35.5 Preparation of test pieces . 36 Procedures
17、for physical properties (“low grammage” sheets) 46.1 General . 46.2 Tensile properties 56.3 Tear index 56.4 Burst index 56.5 Air permeance 56.6 Folding endurance 57 Procedures for physical properties (“high grammage” sheets) 67.1 General . 67.2 Bending resistance index . 67.3 Flat crush resistance i
18、ndex after laboratory fluting . 67.4 Ring crush resistance index . 67.5 Short span compression index . 67.6 Z-directional tensile strength . 78 Test report . 7Bibliography . 8BS EN ISO 5270:2012ISO 5270:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation
19、 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 committee.
20、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.International Standards are drafted in accordance with
21、 the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval
22、 by at least 75 % of the member bodies casting a vote.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.ISO 5270 was prepared by Technical Committee ISO
23、/TC 6, Paper, board and pulps, Subcommittee SC 5, Test methods and quality specifications for pulps.This third edition cancels and replaces the second edition (ISO 5270:1998), which has been technically revised. The list of relevant International Standards for paper and board, to be used for testing
24、 the physical properties of laboratory sheets, has been updated and new standards, such as ISO 1924-3 and ISO 15754, have been included. The option to determine air permeance, using the Bendtsen method (ISO 5636-3) or the Sheffield method (ISO 5636-4) has been inserted, as well as the option to meas
25、ure optical properties.iv ISO 2012 All rights reservedBS EN ISO 5270:2012ISO 5270:2012(E)IntroductionThis International Standard includes the determination of physical properties of both “low grammage” sheets and “high grammage” sheets, prepared in accordance with ISO 5269-1, ISO 5269-2 or ISO 5269-
26、3. The oven-dry grammage of the “low grammage” sheets is (60 2) g/m2using the conventional sheet former, as described in ISO 5269-1 and ISO 5269-3, or (75 2) g/m2using the Rapid-Kthen sheet former, as described in ISO 5269-2 and ISO 5269-3. The oven-dry grammage of the “high grammage” sheets is 140
27、g/m2, with a tolerance of 3 % using the conventional and the Rapid Kthen sheet formers, except for the z-directional tensile strength where the grammage is 90 g/m2.For determination of physical properties, ISO 5270 refers to the relevant International Standards for paper and board for the descriptio
28、n and calibration of the required equipment, and for the calculation and reporting of results. This International Standard, however, specifies the procedures for testing laboratory sheets where the amount of material is limited, compared to testing of paper and board to which the relevant Internatio
29、nal Standards referred to are applicable, and for that reason there may be a discrepancy. ISO 2012 All rights reserved vBS EN ISO 5270:2012BS EN ISO 5270:2012Pulps Laboratory sheets Determination of physical properties1 ScopeThis International Standard specifies the relevant International Standards
30、to be used for the determination of physical properties of laboratory sheets made of all kind of pulps. It is applicable to laboratory sheets prepared in accordance with ISO 5269-1, ISO 5269-2 or ISO 5269-3.In this International Standard, it is left to the pulp producer and the pulp user to agree up
31、on which properties are relevant to be tested. The results are, if applicable, reported in index form.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the lat
32、est edition of the referenced document (including any amendments) applies.ISO 187:1990, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samplesISO 534, Paper and board Determination of thickness, density and spec
33、ific volumeISO 536, Paper and board Determination of grammageISO 1924-2, Paper and board Determination of tensile properties Part 2: Constant rate of elongation method (20 mm/min)ISO 1924-3, Paper and board Determination of tensile properties Part 3: Constant rate of elongation method (100 mm/min)IS
34、O 1974, Paper Determination of tearing resistance Elmendorf methodISO 2493-1, Paper and board Determination of bending resistance Part 1: Constant rate of deflectionISO 2493-2, Paper and board Determination of bending resistance Part 2: Taber-type testerISO 2758, Paper Determination of bursting stre
35、ngthISO 5269-1, Pulps Preparation of laboratory sheets for physical testing Part 1: Conventional sheet-former methodISO 5269-2, Pulps Preparation of laboratory sheets for physical testing Part 2: Rapid-Kthen methodISO 5269-3, Pulps Preparation of laboratory sheets for physical testing Part 3: Conven
36、tional and Rapid-Kthen sheet formers using a closed water systemISO 5626, Paper Determination of folding enduranceISO 5636-3, Paper and board Determination of air permeance (medium range) Part 3: Bendtsen methodISO 5636-4, Paper and board Determination of air permeance (medium range) Part 4: Sheffie
37、ld methodISO 5636-5, Paper and board Determination of air permeance (medium range) Part 5: Gurley methodISO 7263, Corrugating medium Determination of the flat crush resistance after laboratory flutingISO 9895, Paper and board Compressive strength Short-span testINTERNATIONAL STANDARD ISO 5270:2012(E
38、) ISO 2012 All rights reserved 1BS EN ISO 5270:2012ISO 5270:2012(E)ISO 12192, Paper and board Determination of compressive strength Ring crush methodISO 15754, Paper and board Determination of z-directional tensile strengthNOTE A separate International Standard, ISO 153611, has been published for pu
39、lps describing the determination of zero-span tensile strength, wet or dry.3 PrincipleDetermination of physical properties of laboratory sheets using the procedure and equipment described in the relevant International Standards given in Tables 1 and 2. The results are, if applicable, reported in ind
40、ex form.NOTE The properties to be measured are jointly determined by the pulp producer and the pulp user.4 ApparatusThe equipment is specified in the respective International Standards given in Tables 1 and 2 to which this International Standard refers. The equipment shall be calibrated in accordanc
41、e with the instructions in the relevant International Standards given in Tables 1 and 2.5 Trimmed laboratory sheets5.1 Selection of laboratory sheetsDepending on the properties to be tested, determine the number of laboratory sheets required (see Table 1 and/or Table 2). The specification of the num
42、ber of test pieces needed for each property defines the area required for testing and thus the number of sheets.Each sheet shall be free of visible defects.5.2 Conditioning of laboratory sheetsCondition the laboratory sheets in the standard atmosphere (23 1) C and (50 2) % relative humidity, or in t
43、he atmosphere allowed in tropical countries, according to ISO 187.ISO 187 states in its Introduction that “Unless otherwise specified, the equilibrium condition should be attained by the sorptive process”. For tests in which the hysterisis of the equilibrium moisture content may lead to important er
44、rors, the sample shall be pre-conditioned before conditioning (see ISO 187:1990, 6.1). If it is known that conditioning will result in an equilibrium moisture content equivalent to that achieved by sorption, the pre-conditioning may be omitted.If the laboratory sheets have been prepared using the co
45、nventional sheet former, according to ISO 5269-1 or ISO 5269-3, the sheets may reach equilibrium by desorption. If the laboratory sheets have been prepared using the Rapid-Kthen sheet former, according to ISO 5269-2 or ISO 5269-3, the sheets may reach equilibrium by sorption of moisture.Whenever the
46、 test atmosphere is known to have been outside the limits and there is any chance that the moisture content of the sheets has been changed by such excursions, all sheets must be reconditioned before any further testing (see ISO 187).Keep the laboratory sheets in the conditioning atmosphere until tes
47、ting is completed.NOTE 1 Pre-conditioning using heat may change the optical properties and is, for that reason, not recommended for the sheets to be used for measuring optical properties.NOTE 2 It is not recommended to use the Rapid-Kthen sheet former, described in ISO 5269-2 and ISO 5269-3, for pre
48、paration of laboratory sheets intended for determination of optical properties, since the high temperature used when drying the sheets may change the optical properties.2 ISO 2012 All rights reservedBS EN ISO 5270:2012ISO 5270:2012(E)NOTE 3 The moisture content and thus physical properties of labora
49、tory sheets at a given relative humidity (e.g. at. 50 % RH) depend on the moisture history of the sheets. The moisture content of sheets dried from high relative humidity to low relative humidity follows a different, higher moisture content, path in comparison with sheets taken from low to high relative humidity, an effect called hysteresis. For laboratory sheets prepared using the Rapid-Kthen sheet former (ISO 5269-2 and ISO 5269-3), the 50 % RH is reached from a lowe
