1、BRITISH STANDARDBS EN ISO 5263-1:2004Pulps Laboratory wet disintegration Part 1: Disintegration of chemical pulpsThe European Standard EN ISO 5263-1:2004 has the status of a British StandardICS 85.040g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40
2、g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 5263-1:2004This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2007 BSI 2007ISBN 978 0 580 50430 3National forewordThis British
3、 Standard was published by BSI. It is the UK implementation of EN ISO 5263-1:2004. This standard, together with BS EN ISO 5263-2 and BS EN ISO 5263-3, supersedes BS EN ISO 5263:1997, which will be withdrawn on publication of these standards.The UK participation in its preparation was entrusted to Te
4、chnical Committee PAI/11, Methods of test for paper, board and pulps.A list of organizations represented on PAI/11 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.Co
5、mpliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 5263-1September 2004ICS 85.040 Supersedes EN ISO 5263:1997 English versionPulps - Laboratory wet disintegratio
6、n - Part 1: Disintegration ofchemical pulps (ISO 5263-1:2004)Ptes - Dsintgration humide en laboratoire - Partie 1:Dsintgration des ptes chimiques (ISO 5263-1:2004)This European Standard was approved by CEN on 2 August 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations whi
7、ch stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standa
8、rd exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards
9、 bodies of 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 and United Kingdom.EUROPEAN COMMITTEE F
10、OR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2004 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 5263-1:2004: EForeword This European Standa
11、rd shall be given the status of a national standard, either by publication of an identical textlatest by March 2005. This document supersedes EN ISO 5263 :1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement t
12、his European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark,Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.Endorsement notice The text of ISO 5263-1:2004 has been approved by CEN as EN ISO 5263-1:2004 without any modifications.Th
13、is document (EN ISO 5263-1:2004) 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. or by endorsement, at the latest by March 2005, and conflicting national
14、standards shall be withdrawn at the Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,EN ISO 5263-1:2004Reference numberISO 5263-1:2004(E)INTERNATIONAL STANDARD ISO5263-1First edition2004-09-01Pulps Laboratory wet disintegration Part 1:
15、 Disintegration of chemical pulps Ptes Dsintgration humide en laboratoire Partie 1: Dsintgration des ptes chimiques EN ISO 5263-1:2004ii iiiContents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 Definition 1 4 Apparatus. 1 5 Preparation of test portion. 2 6 Procedure. 2 7 Test report 3 Ann
16、ex A (normative) Construction of the Standard disintegrator 4 Annex B (normative) Checking the Standard disintegrator. 6 EN ISO 5263-1:2004iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of prep
17、aring 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. International organizations, governmental and non-governmental, in
18、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 the rules given in the ISO/IEC Directives, Part 2. The main task
19、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 by at least 75 % of the member bodies casting a vote. Attention
20、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 5263-1 was prepared by Technical Committee ISO/TC 6, Paper, board and pulps, Subcommittee SC 5, Test method
21、s and quality specifications for pulps. This first edition cancels and replaces ISO 5263:1995 which has been technically revised. In the revision, ISO 5263 has been divided into three parts; Part 1 which is applicable to chemical pulps, Part 2 which is applicable to mechanical pulps without latency
22、and Part 3 which is applicable to mechanical pulps exhibiting latency. In Part 3, an informative Annex has been inserted describing the effect of latency in mechanical pulps. ISO 5263 consists of the following parts, under the general title Pulps Laboratory wet disintegration: Part 1: Disintegration
23、 of chemical pulps Part 2: Disintegration of mechanical pulps at 20 C Part 3: Disintegration of mechanical pulps at W 85 C EN ISO 5263-1:20041Pulps Laboratory wet disintegration Part 1: Disintegration of chemical pulps 1 Scope This part of ISO 5263 specifies an apparatus and the procedure for the la
24、boratory-wet disintegration of chemical pulps. This apparatus and procedure are required for preparation of the test portion in a number of other International Standards dealing with pulps. In principle, this method is applicable to all kind of chemical pulps, including recovered fibres. It is not s
25、uitable for mechanical pulps and some very long-fibred chemical pulps such as those from cotton and similar materials. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated r
26、eferences, the latest edition of the referenced document (including any amendments) applies. ISO 638, Pulps Determination of dry matter content ISO 4119, Pulps Determination of stock concentration ISO 14487, Pulps Standard water for physical testing 3 Definition For the purposes of this part of ISO
27、5263, the following definition applies. 3.1 disintegration of chemical pulp mechanical treatment in water so that interlaced fibres, which were free in the pulp stock, are again separated from one another without appreciably changing their structural properties 4 Apparatus Ordinary laboratory appara
28、tus and the following: 4.1 Standard disintegrator, as described in Annex A. NOTE The procedure for checking the Standard disintegrator is given in Annex B. 4.2 Balance, capable of weighing with an accuracy of 0,2 g. 4.3 Standard water, for physical testing, as specified in ISO 14487. EN ISO 5263-1:2
29、0042 5 Preparation of test portion Mechanical, semi-chemical and chemi-mechanical pulps shall be disintegrated according to the procedure described in Part 2 or Part 3 of ISO 5263. All pulps which exhibit latency must be disintegrated according to the procedure described in ISO 5263-3. If the pulp i
30、s wet or air-dry, determine the dry matter content in accordance with ISO 638. If the pulp is in slush form, determine the dry matter content in accordance with ISO 4119. If the concentration of a slush pulp sample is less than 1,5 % by mass, thicken it to the appropriate volume, carefully avoiding
31、the loss of fines. This is most easily done by sedimentation of the suspension and removing a part of the water phase or by dewatering through a filter paper on a Bchner funnel. Use standard water (4.3) for disintegrating pulps to be used in tests where drainability properties are of importance, inc
32、luding laboratory beating. In all cases, use the same water quality as required in the procedure for which the pulp is disintegrated. For each disintegration, take a test portion corresponding to a mass of (30,0 0,5) g of oven-dry pulp. If the sample is in sheet-form, do not cut the sheets and avoid
33、 taking cut edges. If the dry matter content is 20 % or more of the pulp, soak the test portion in 1 l to 1,5 l of water (standard water or other) at (20 5) C for at least the minimum soaking time specified in Table 1. If the pulp is in the form of sheets or slabs, after soaking tear the test portio
34、n into pieces with dimensions of approximately 25 mm 25 mm. Soaking for a time longer than the minimum specified, for example overnight, has been found not to have any significant effect on the results. The soaking time shall, however, never be longer than 24 h for any pulp grade. Table 1 Recommende
35、d soaking time for chemical pulps Dry matter content of the pulp, % by mass Minimum soaking time 60 4 h Where necessary for climatic reasons, a temperature of between 25 C and 30 C may be used, provided that this is stated in the test report. 6 Procedure Transfer the test portion, after preparing as
36、 above, into the container of the Standard disintegrator (4.1). Add water, of the same quality as used in Clause 5, at (20 5) C to give a volume of (2 000 25) ml. Set the revolution counter to zero. Switch the motor on and allow the propeller to make the number of revolutions specified in Table 2. S
37、top the propeller and check visually that the pulp is completely disintegrated, for instance by diluting a small portion from the disintegrator with water in a glass cylinder and inspecting it under transmitted light. If it is not completely disintegrated, continue the disintegration until complete
38、separation of fibres is achieved. Table 2 Recommended number of revolutions for chemical pulps Dry matter content of the pulp % by mass Number of revolutions 20 10 000 W 20 30 000 EN ISO 5263-1:20043If for any reason a different pulp charge or a different number of revolutions is used, this shall be
39、 stated in the test report. 7 Test report The test report shall include the following particulars: a) reference to this part of ISO 5263 (e.g., ISO 5263-1:2004); b) all the information necessary for complete identification of the sample; c) the water grade (standard water, distilled water or tap wat
40、er) used; d) the soaking time; e) the dry matter content of the sample; f) any unusual features observed in the course of the test; g) any operations not specified in this International Standard, or that are regarded as optional, which might have affected the results. EN ISO 5263-1:20044 Annex A (no
41、rmative) Construction of the Standard disintegrator A.1 Materials All components that come into contact with pulp suspensions shall be resistant to water and to dilute acids and alkalis. Stainless steel or glass-fibre-reinforced plastic material is normally used. A.2 Standard disintegrator The cylin
42、drical container, Figure A.1, is fitted with four equally spaced spiral baffles extending between 32 mm from the bottom and 57 mm from the lid, each baffle traversing half the internal circumference of the container. The baffles spiral downwards in a clockwise direction. There is a fillet of radius
43、13 mm around the inside of the base of the container. The three-bladed propeller is mounted on a vertical shaft centrally in the container, at a fixed distance above the bottom. It is driven at the specified speed in the stock and a counter is fitted to record the number of revolutions. The counter
44、should preferably be of the pre-set type, which will switch off the disintegrator after the required number of revolutions. Viewed from above, the propeller rotates in a clockwise direction. The container is provided with a lid, which, in most disintegrators, is fitted to the propeller/motor assembl
45、y. The container is fixed firmly in position during operation of the disintegrator, but it is capable of being removed and replaced easily and quickly. A.3 Dimensions Part Dimension Specified value (unless otherwise stated) Tolerance Container internal height internal diameter radius of fillet 191 m
46、m 152 mm 13 mm 2 mm 2 mm 2 mm Baffles square section height from container base distance from rim ends radiused edges radiused spacing (centres) 6,5 mm 32 mm 57 mm 3 mm 0,4 mm 51 mm 1 mm 1 mm 1 mm 0,5 mm 0,1 mm 1 mm Propeller diameter of swept circle at tip of blades diameter of hub distance between
47、 propeller blades and container base (lowest point) 90 mm W 22 mm 25 mm 0,5 mm 2 mm Propeller blades width at hub maximum width thickness edges radiused ends radiused pitch 18,2 mm 22,5 mm 1,6 mm 0,8 mm 4 mm 2 0,5 mm 0,5 mm 0,5 mm 0,2 mm 1 mm 15 Propeller shaft diameter end taper u 20 mm to fit any
48、propeller hub EN ISO 5263-1:20045A.4 Rotational frequency The rotational frequency of the propeller shaft is (49,0 1,5) s1. Dimensions in millimetres Key 1 6,5 mm 6,5 mm section 3 round edges R 0,4 2 end R 3 4 four baffles, each a half-turn around the container (three shown) aNot to scale. Figure A.
49、1 Standard disintegrator details EN ISO 5263-1:20046 Annex B (normative) Checking the Standard disintegrator Check the Standard disintegrator regularly. Special care shall be taken to ensure that a) the propeller shaft rotates smoothly and is always centred with respect to the container; b) the propeller runs at the specified rotational frequency; c) the propeller blades are set as specified (this may be checked by means of a propeller gauge); d) the dimensions of the propell
