1、BRITISH STANDARD BS EN ISO 5269-2:2004 Pulps Preparation of laboratory sheets for physical testing Part 2: Rapid-Kthen method The European Standard EN ISO 5269-2:2004 has the status of a British Standard ICS 85.040 BS EN ISO 5269-2:2004 This British Standard was published under the authority of the
2、Standards Policy and Strategy Committee on 26 January 2005 BSI 26 January 2005 ISBN 0 580 45371 5 National foreword This British Standard is the official English language version of EN ISO 5269-2:2004. It is identical with ISO 5269-2:2004. It supersedes BS EN ISO 5269-2:2001 which is withdrawn. The
3、UK participation in its preparation was entrusted to Technical Committee PAI/11, Methods of test for paper, board and pulps, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards whic
4、h implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publicat
5、ion does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/
6、European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title
7、page, the EN ISO foreword page, the ISO title page, pages ii to v, a blank page, pages 1 to 8, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments EUROPEAN S
8、TANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 5269-2 December 2004 ICS 85.040 Supersedes EN ISO 5269-2:2000 English version Pulps - Preparation of laboratory sheets for physical testing - Part 2: Rapid-Kthen method (ISO 5269-2:2004) Ptes - Prparation des feuilles de laboratoire pour essais physique
9、s - Partie 2: Mthode Rapid-Kthen (ISO 5269- 2:2004) This European Standard was approved by CEN on 6 December 2004. 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
10、alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by t
11、ranslation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greec
12、e, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre:
13、 rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 5269-2:2004: E Foreword The text of ISO 5269-2:2004 has been prepared by Technical Committee ISO/TC 6 “Paper, board and pulps” of the Int
14、ernational Organization for Standardization (ISO) and has been taken over as EN ISO 5269-2:2004 by 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 ide
15、ntical text or by endorsement, at the latest by June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. This document supersedes EN ISO 5269-2:2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries
16、 are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
17、and United Kingdom. Endorsement notice The text of ISO 5269-2:2004 has been approved by CEN as EN ISO 5269-2:2004 without any modifications. ENISO52692:2004 Reference number ISO 5269-2:2004(E)INTERNATIONAL ADNATSDR ISO 5-9622 Ttide drihino -400210-11 Pulps Preparation of laboratory sheets for physic
18、al testing Part 2: Rapid-Kthen method Ptes Prparation des feuilles de laboratoire pour essais physiques Partie 2: Mthode Rapid-Kthen ENISO52692:2004Referecne unbmer OSI 2-9625002:)E(4INTERNATIONAL STANDARD ISO 5269-2 Third edition 2004-11-01 spluP Praperoitan bal foorotary eehsst p rofhyslaci sett g
19、ni :2 traP dipaR-Khttem nedoh setP rP raptaoised n fiuellse ed baloraotrip eruo sesasi yhpsiuqse raPti:2 e MtdohaR eip-dKehtn ENISO52692:2004 ii ENISO52692:2004 iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references. 1 3 Principle. 1 4 Equipment 2 5 Pretreatment and preparation
20、 of sample 5 5.1 Pretreatment 5 5.2 Preparation of sample 6 6 Procedure. 6 6.1 Sheet forming 6 6.2 Transfer of the sheet. 6 6.3 Drying and conditioning. 7 7 Test report 7 Bibliography . 8 ENISO52692:2004iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of
21、 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. Int
22、ernational 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 t
23、he 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
24、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 5269-2 was prepared by Technical Committee
25、ISO/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 5269-2:1998), of which the Introduction, Clauses 1, 2 and 7 and Subclause 5.1 have been revised. ISO 5269 consists of the following
26、parts, under the general title Pulps Preparation of laboratory sheets for physical testing: Part 1: Conventional sheet-former method Part 2: Rapid-Kthen method ENISO52692:2004 vIntroduction It has been agreed that the ultimate aim of standardization of the preparation of laboratory sheets should be
27、to develop one method which is internationally acceptable and which, if possible, permits the use of different types of sheet-making apparatus. For practical reasons, it has not proved possible to achieve this at present. Therefore, as an interim measure, in view of the widespread use of equipment d
28、escribed in this part of ISO 5269, it has been decided to provide agreed guidance on the use of different types of equipment in order to achieve consistency of results with each method. To avoid creating too many levels of results, the method specified in this part of ISO 5269 should preferably be u
29、sed with the PFI mill method of laboratory beating according to ISO 5264-2. The method specified in ISO 5269-1 (Conventional sheet-former method) should preferably be used with the Valley beater or PFI mill methods of laboratory beating according to ISO 5264-1 2and 5264-2, respectively. ENISO52692:2
30、004blankINTENRATIONAL TSANDADR IS-9625 O2:(4002E)1Pulps Preparation of laboratory sheets for physical testing Part 2: Rapid-Kthen method 1 Scope This part of ISO 5269 specifies a method, using a Rapid-Kthen sheet former, for the preparation of laboratory sheets of pulp for the purpose of carrying ou
31、t subsequent physical tests on these sheets in order to assess the relevant properties of the pulp itself. This part of ISO 5269 is applicable to most kinds of pulp. It is not suitable for some pulps with very long fibres, such as those made from unshortened cotton, flax and similar materials. This
32、method is not suitable for the preparation of laboratory sheets for the determination of diffuse blue reflectance factor (ISO brightness) in accordance with ISO 3688 1 . WARNING When long-fibred pulp is used in the unshortened form, the sheet formation may not always be satisfactory. 2 Normative ref
33、erences The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 187, Paper, board and pulps Standard
34、atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples ISO 4119, Pulps Determination of stock concentration ISO 5263-1, Pulps Laboratory wet disintegration Part 1: Disintegration of chemical pulps ISO 5263-2, Pulps Laboratory wet disintegratio
35、n Part 2: Disintegration of mechanical pulps at 20 C ISO 5263-3, Pulps Laboratory wet disintegration Part 3: Disintegration of mechanical pulps at W 85 C ISO 5264-2, Pulps Laboratory beating Part 2: PFI mill method ISO 5269-1, Pulps Preparation of laboratory sheets for physical testing Part 1: Conve
36、ntional sheet- former method 3 Principle A circular sheet is formed from a pulp suspension on a wire screen under suction. The sheet is subjected to pressure and dried in a dryer, with almost complete prevention of shrinkage, in a specified way with respect to the pressure applied, the suction and t
37、he temperature. ENISO52692:20042 4 Equipment 4.1 Rapid-Kthen apparatus, consisting of a sheet former, transfer equipment, one or more dryers and accessories (see Figure 1). The parts of the instrument which come into contact with stock or water shall be corrosion resistant. 4.1.1 Sheet former, consi
38、sting of a stock container for preparing the pulp suspension, the screen section on which wet fibre is forwarded, and the suction chamber for drawing off and holding the water after passing through the screen. The lower part of the stock container, screen section and suction chamber may be sealed of
39、f. 4.1.1.1 Stock container (see Figure 1) The stock container consists of a transparent cylindrical tube (1) with an internal diameter of 200 mm 0,5 mm and a capacity of not less than 10 litres. The container is graduated in litres. Around the circumference of the lower part of the stock container a
40、re two rows of holes (2), 1,5 mm in diameter, one above the other, connecting radially to a circular cavity (3) round the outside of the cylinder. Each row contains 40 holes. The distance between the screen surface and the lower row of holes is 10 mm, and the space between the lower and upper rows i
41、s 7 mm. The lower row of holes is drilled horizontally and the upper row is inclined upwards at an angle of 30 towards the centre of the cylinder. The stock container is so constructed that it can be lifted off the screen section. The circular cavity can be filled with water and compressed air. 4.1.
42、1.2 Screen section The screen section, which separates the stock container and the suction chamber, consists of the sheet- forming screen (4) and the supporting screen (5). The nickel sheet-forming screen gauze is evenly stretched over the ring and can be lifted off from the supporting screen. The d
43、imensions of the twilled sheet-forming screen gauze are as follows: Number of warp wires: 60 wires/cm Number of weft wires: 55 wires/cm Wire diameter: 0,060 mm to 0,065 mm The supporting screen gauze is evenly stretched over bars (6) having a width of 2 mm and a height of 30 mm arranged parallel to
44、one another and spaced 10 mm 2 mm apart. The two upper edges of each bar are chamfered at an angle of 75 to the horizontal in such a way that a 0,5 mm wide ledge remains as a support for the supporting screen. The supporting screen shall be exactly horizontally aligned. The dimensions of the support
45、ing screen gauze in simple plain weave, made from phosphor bronze are as follows: Number of warp wires: 8 wires/cm Number of weft wires: 7 wires/cm Wire diameter: 0,35 mm 4.1.1.3 Suction chamber The suction chamber has a capacity of more than 10 litres, and has a water outlet (7) that can be closed.
46、 The suction chamber can be connected to a vacuum pump by means of a suction tube (8) placed at its axis, and covered so that it is protected against the infiltration of water. A regulating vent limits the maximum suction in the suction chamber to 27 kPa. ENISO52692:2004 3Key 1 transparent cylindric
47、al tube 11 rubber diaphragm 21 suction chamber 2 rows of holes 12 perforated, flat plate 22 hot water 3 circular cavity 13 phosphor bronze screen gauzes 23 dryer 4 sheet-forming screen 14 cooling body 24 heating chamber 5 supporting screen 15 sheet former 25 steam chamber 6 bars 16 air 26 tap water
48、7 water outlet 17 water 27 vacuum pump 8 suction tube 18 stock container 28 laboratory sheet 9 carrier boards 19 water or air 10 paper cover sheets 20 screen section Figure 1 Rapid-Kthen sheet-forming and drying instrument 4.1.2 Transfer equipment for the wet fibre sheet, consisting of a couch roll,
49、 carrier boards and paper cover sheets. 4.1.2.1 Couch roll The couch roll has a diameter of 120 mm to 130 mm, a length of 240 mm to 260 mm and a mass of 3,0 kg 0,2 kg. The outer surface shall be resilient and is preferably made of felt about 20 mm thick. ENISO52692:20044 4.1.2.2 Carrier boards (9) Circular sheets of bleached lined folding boxboard, without colorants and fluorescent whiteni
