1、BRITISH STANDARD Plastics - Vinyl chloride homopolymer and copolymer resins - Sieve analysis in water The European Standard EN IS0 1624:2001 has the status of a British Standard ICs 83.080.20 BS EN IS0 1624:2002 Incorporating Corrigenda Nos. 1, 2, Band 4 Er it ish Sta nda rds NO COPYINGWITHOUT BSI P
2、ERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN IS0 1624:ZOOZ Amd. No. 13710 Corrigendum No. 1 National foreword Date Comments 13 February 2002 Correction to title on front cover. This British Standard is the official English language version of EN IS0 1624:2001. It is identical with IS0 1624:2
3、001. It supersedes BS EN IS0 1624:1997 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/82, Thermoplastic Materials which has the responsibility to: 13892 Corrigendum No. 3 14172 Corrigendum No. 4 - - aid enquirers to understand the text; present t
4、o the responsible internationaUEuropean 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. - A list of organizations represented on this committee can be ob
5、tained on request to its secretary. Cross-references The British Standards which 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” facilit
6、y of the BSI Electronic Catalogue or of British Standards Online. This publication 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.
7、24 April 2002 Replacing the EN IS0 title page and foreword page. Correction to EN IS0 foreword page. 15 October 2002 This British Standard, having been prepared under the direction of the Materials and Chemicals Sector Policy and Strategy Committee, was published under the authority of the Standards
8、 Policy and Strategy Committee on O1 February 2002 Summary of pages This document comprises a front cover, an inside front cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, pages ii to iv, pages 1 to 6, an inside back cover and a back cover. The BSI copyright date displayed
9、 in this document indicates when the document was last issued. Amendments issued since publication Q BSI 15 October 2002 13774 19 March 2002 Incorporation of revised EN Foreword. corrigendum No. 2 ISBN O 580 38961 8 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 1624 Decem ber 2001 ICs 83.
10、080.20 Supersedes EN IS0 1624:1997 English version Plastics - Vinyl choride homopolymer and copolymer resins - Sieve analysis in water (IS0 1624:2001) Plastiques - Rsines dhomopolymeres et de copolymres de chlorure de vinyle -Analyse granulometrique par tamisage sous courant deau (IS0 1624:2001) Kun
11、ststoffe - Vinylchlorid-Home und Copolymerisate - Siebanalyse im Wasser (IS0 1624:2001) This European Standard was approved by CEN on 15 December 2001. CEN members are bound to comply with the CEWCENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
12、 of a national standard without any alteration. Upto-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A versio
13、n in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France,
14、Germany, Greece, Iceland, Ireland. Italy. Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPISCHES KOMITEE FOR NORMUNG Management Centre: rue de Stassart, 36 8-1050 Brussels O 2001 CE
15、N All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN IS0 1624:2001 E EN IS0 1624:2001 I CORRECTED 2002-09-25 I Foreword This document (IS0 1624:2001) has been prepared by Technical Committee ISOTTC 61 “Plastics“ in collaboration with Tech
16、nical Committee CENTTC 249 “Plastics“, the secretariat of which is held by IBN. 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 by June 2002, and conflicting national standards shall be withdrawn at
17、the latest by June 2002. This document supersedes EN 1624:1997 According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
18、 Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of IS0 1624:2001 has been approved by CEN as EN IS0 1624:2001 without any modifications. INTERNATIONAL STANDARD EN IS0 1624:2001 IS0 1624 Second edition
19、 2001 -1 2-1 5 Plastics - Vinyl chloride homopolymer and copolymer resins - Sieve analysis in water Plastiques - Rsines dhomopolymres et de copolymres de chlorure de vinyle - Analyse granulomtrique par tamisage sous courant deau Reference number IS0 1624:2001(E) EN IS0 1624:2001 EN IS0 1624:2001 Con
20、tents Page Foreword . iv I Scope i 2 Normative reference i 3 Term and definition . 1 4 Principle 1 5 Reagent . 1 6 Apparatus . 2 7 Procedure . 2 8 9 Precision . 6 10 Test rep0 rt 6 Expression of results 5 . 111 EN IS0 1624:2001 Foreword IS0 (the International Organization for Standardization) is a w
21、orldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented
22、on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafte
23、d in accordance with the rules given in the ISO/IEC Directives, Part 3. 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 Stand
24、ard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. IS0 shall not be held responsible for identifying any or all such patent rights. IS0 1624 wa
25、s prepared by Technical Committee ISOITC 61, Plastics, Subcommittee SC 9, Thermoplastic materials. This second edition cancels and replaces the first edition (IS0 1624:1978), which has been modified in the following respects: - the drying temperature has been raised from 80 “C to 1 I O “C; - a preci
26、sion statement based on current test data has been included. iv EN IS0 1624:2001 Plastics - Vinyl chloride homopolymer and copolymer resins - Sieve analysis in water 1 Scope This International Standard specifies a method for the determination of the sieve retention of vinyl chloride homopolymer and
27、copolymer resins. Control of this characteristic can help to ensure consistency of supply and predictable processing behaviour. 2 Normative reference The following normative document contains provisions which, through reference in this text, constitute provisions of this International Standard. For
28、dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. For un
29、dated references, the latest edition of the normative document referred to applies. Members of IS0 and IEC maintain registers of currently valid International Standards. IS0 565, Test sieves - Metal wire cloth, perforated metal plate and electroformed sheet - Nominal sizes of openings 3 Term and def
30、inition For the purposes of this Intemational Standard, the following term and definition apply. 3.1 sieve retention the percentage, by mass, of resin remaining on the sieve after a sieve analysis test 4 Principle A test portion is sieved under a stream of water, using standard-aperture sieves. NOTE
31、 This method is particularly suited to emulsion resins. Sieving under a stream of water gives truer results than a dry sieving method in which static electricity interferes. 5 Reagent 5.1 Wetting agent, for example a 5 % to 10 % solution of sodium alkylsulfonate. 1 EN IS0 1624:2001 6 Apparatus 6.1 0
32、,250 mm, and fitted with deflectors to prevent loss of sample by spray (see Figure 1). NOTE - the prescribed sieves are also used; - new sieves are chosen from the series provided in IS0 565. Set of two sieves, diameter 200 mm to 300 mm, height 30 mm to 50 mm, having mesh sizes 0,063 mm and Other me
33、sh sizes may be used provided that 6.2 see 7.1 b). Balance, accurate to 2 0,Ol g, range and size sufficient to accommodate the sieves and the filtered resin 6.3 6.4 water supply. Oven, capable of being maintained at I10 “C tr 2 “C. Filter, placed between the water supply tap and the apparatus, and i
34、ntended to exclude impurities in the 6.5 Sprinkling device, for one or, better, several sieves, designed so that: - the mesh and inside walls of the sieve are thoroughly sprinkled over their entire surface; - the resin is agitated by the jets, e.g. by using jet apertures inclined at an angle to the
35、screen of the sieve; - the inclination of the jets is such as to prevent track formation in the resin, e.g. by crossing the jet directions; - the sprayed water passes immediately through the screen and no bulk accumulation of water occurs on it during the sieving of resins. The water shall finally p
36、ass into a dark-coloured vessel to check for the absence of resin particles in the water. Figure 1 shows a schematic apparatus including a rotating sprinkling device for several sieves, and is given as an example meeting the requirements of this International Standard. 6.6 Filter funnel or filter cr
37、ucible with adaptor, diameter 40 mm and mean pore size 20 pm to 40 pm, 7 Procedure 7.1 General This International Standard permits several variations, namely: a) It is possible - either to conduct a single test using two superimposed screens, provided that a sprinkler device is fitted to each sieve
38、(see Figure 1) (recommended method), - or to carry out two tests on two separate test portions, using a different sieve each time. b) It is possible to dry the residue - either in a filter funnel or in a filter crucible (recommended method), - or directly on the sieve. The latter method requires the
39、 sieves to be resistant to repeated heating and cooling (for example, they should be constructed from stainless steel). 2 EN IS0 1624:2001 3 f2 4- IL r8 Key 1 Water 8 1-mm-thick slotted spray plate (ID 3 mm to 4 mm) 2 Flow-regulating valve 9 Sieve 3 Filter 10 Deflector 4 Motor 11 Bowl with perforate
40、d bottom 5 Rotating joint 12 Dark-coloured dish 6 Pulley controlling spray plates 13 Stainless-steel sieve support 7 0 int. 3 mm to 10 mm 9 10 9 Il 12 Figure 1 -Sketch of multiple-sieve spraying device 3 EN IS0 1624:2001 7.2 Sieving If, at the end of the operation, it is desired to weigh the resin o
41、n the sieve, weigh the sieves to the nearest 0,l g after drying them in the oven (6.3), at 110 “C I 2 “C, for 1 h and cooling in a desiccator. Place the sieve or sieves below the sprinkling device and arrange the bowl with a perforated bottom and the dark- coloured dish beneath them to take the wate
42、r away to a sink. If several superimposed sieves are used, they shall be arranged from top to bottom according to decreasing mesh size. Weigh, to the nearest 0,l g, approximately 25 g (mass m) of the resin into a 400 ml beaker. Add a suitable quantity of wetting agent (5.1) followed by bvo portions,
43、 each of approximately 50 mi, of water, mixing carefully after each addition. NOTE The quantity of wetting agent added depends on the type of resin being tested. For some resins composed of very fine particles, it may be necessary to add the wetting-agent solution progressively, mixing it in with a
44、glass rod to obtain a paste, which is then diluted gradually before pouring it on the upper sieve, where the resin should then not form lumps or agglomerates. Set the sprinkler system in operation, taking care that the meshes are well moistened. Introduce the prepared suspension, in one or several g
45、oes, into the upper sieve and carefully rinse the beaker several times, pouring the washings into the upper sieve each time. Apply the fastest rate of water consistent with the avoidance of overflowing or splashing. Complete the sieving by hand spraying until the drain-off liquid in the dark-coloure
46、d dish is free from particles. Lift each sieve and, using water jets, transfer to the next lower sieve any particles that might have remained adhering to its underside. 7.3 Drying and weighing 7.3.1 Drying on a filter bed Wash the filter funnel or filter crucible, dry at 110 “C I 2 “C, and weigh to
47、the nearest 0,l g after cooling in a desiccator. Transfer the residue on each sieve quantitatively, using water jets, to this funnel or crucible fitted on a vacuum filtering flask. Dry the funnel or crucible (with the residue from one sieve) at 110 “C I2 “C in the oven to constant mass. Weigh to the
48、 nearest 0,l g after cooling in a desiccator. Calculate the mass of residue by subtracting the mass of the funnel or crucible from the mass of the funnel or crucible plus residue. 7.3.2 Drying on the sieve Place each sieve, with its residue, in the oven, maintained at I10 “C f 2 “C, and dry to const
49、ant mass. Weigh to the nearest 0,l g after cooling in a desiccator. Calculate the mass of residue by subtracting the mass of the sieve determined as described in 7.2 from the mass of the sieve plus residue. 4 EN IS0 1624:ZOOl 7.4 Number of determinations Each determination shall be carried out in duplicate. Do not take the results into consideration unless the following conditions are fulfilled: a) Residue (calculated as indicated in clause 8) not less than 5 % The two measurements are acceptable if the difference between their absolute values is less than or equal to 2 %
