1、BRITISH STANDARD BS EN ISO 1624:2002 Incorporating Corrigenda Nos. 1, 2, 3 and 4 Plastics Vinyl chloride homopolymer and copolymer resins Sieve analysis in water The European Standard EN ISO 1624:2001 has the status of a British Standard ICS 83.080.20 BS EN ISO 1624:2002 This British Standard, havin
2、g been prepared under the direction of the Materials and Chemicals Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 01 February 2002 BSI 15 October 2002 ISBN 0 580 38961 8 National foreword This British Standard is the official
3、 English language version of EN ISO 1624:2001. It is identical with ISO 1624:2001. It supersedes BS EN ISO 1624:1997 which is withdrawn.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: A list of organizatio
4、ns represented on this committee can be obtained 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 Correspondenc
5、e Index”, or by using the “Search” facility 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 itsel
6、f confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and pr
7、omulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to iv, pages 1 to 6, an inside back cover and a back cover. The BSI copyright date displayed in this document indicate
8、s when the document was last issued. Amendments issued since publication Amd. No. Date Comments 13710 Corrigendum No. 1 13 February 2002 Correction to title on front cover. 13774 Corrigendum No. 2 19 March 2002 Incorporation of revised EN Foreword. 13892 Corrigendum No. 3 24 April 2002 Replacing the
9、 EN ISO title page and foreword page. 14172 Corrigendum No. 4 15 October 2002 Correction to EN ISO foreword page.EUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO1624 December2001 ICS83.080.20 SupersedesENISO1624:1997 Englishversion PlasticsVinylchoridehomopolymerandcopolymerresins Sieveanalysisi
10、nwater(ISO1624:2001) PlastiquesRsinesdhomopolymresetdecopolymres dechloruredevinyleAnalysegranulomtriquepar tamisagesouscourantdeau(ISO1624:2001) KunststoffeVinylchloridHomoundCopolymerisate SiebanalyseimWasser(ISO1624:2001) ThisEuropeanStandardwasapprovedbyCENon15December2001. CENmembersareboundtoc
11、omplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropean
12、Standardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepubli
13、c,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2001CEN Allrights
14、ofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO1624:2001ECORRECTED20020925 Foreword Thisdocument(ISO1624:2001)hasbeenpreparedbyTechnicalCommitteeISO/TC61 “Plastics“incollaborationwithTechnicalCommitteeCEN/TC249“Plastics“,thesecretariatof whichisheldbyIBN. Th
15、isEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublication ofanidenticaltextorbyendorsement,atthelatestbyJune2002,andconflictingnational standardsshallbewithdrawnatthelatestbyJune2002. ThisdocumentsupersedesEN1624:1997. AccordingtotheCEN/CENELECInternalRegulations,thenationalstan
16、dardsorganizationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium, CzechRepublic,Denmark,Finland,France,Germany,Greece,Iceland,Ireland,Italy, Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandtheUnited Kingdom. Endorsementnotice ThetextofISO1624:2001ha
17、sbeenapprovedbyCENasENISO1624:2001withoutany modifications. ENISO1624:2001 Reference number ISO 1624:2001(E)INTERNATIONAL STANDARD ISO 1624 Second edition 2001-12-15 Plastics Vinyl chloride homopolymer and copolymer resins Sieve analysis in water Plastiques Rsines dhomopolymres et de copolymres de c
18、hlorure de vinyle Analyse granulomtrique par tamisage sous courant deau ENISO1624:2001IS:4261 O1002(E) lcsid FDParemi ihTs PDF file mac ytnoaie nmt deddebyfepca.se In ccaocnadrw eith Aebods licsneilop gnic,y this file mairp eb yntiv ro deewb detu slahl ton ide ebtlnu desse tt ehyfepacse whice era hm
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20、de teDails fo ts ehoftwaorp ercudts ust deo crtaet ehis PDF file ceb na fi dnuon tlareneG eh Info leratit evo tf ehile; tP ehD-Fcrtaeiarap nomtesre were tpoimizf deoirp rnti.gn Evyre casah er t neebakt neo snet eruhat tf ehile is suitlbaf eosu rI yb eSO memidob rebse. In the lnuikletneve y ttah albo
21、rp emler ati gnto it is fnuo,dlp saee inform ttneC ehlar Secrteiraat at tsserdda ehig leb nevwo. ii ENISO1624:2001 iiiContents Page Foreword.iv 1 Scope 1 2 Normative reference1 3 Term and definition .1 4 Principle1 5 Reagent.1 6 Apparatus .2 7 Procedure .2 8 Expression of results 5 9 Precision.6 10
22、Test report 6 ENISO1624:2001iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body intere
23、sted 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 liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
24、Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted 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 tec
25、hnical 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 is drawn to the possibility that some of the elements of this International Standard may be the subject of pate
26、nt rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 1624 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic materials. This second edition cancels and replaces the first edition (ISO 1624:1978), which has been modifie
27、d in the following respects: the drying temperature has been raised from 80 C to 110 C; a precision statement based on current test data has been included. ENISO1624:2001 1Plastics Vinyl chloride homopolymer and copolymer resins Sieve analysis in water 1 Scope This International Standard specifies a
28、 method for the determination of the sieve retention of vinyl chloride homopolymer and 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, thr
29、ough reference in this text, constitute provisions of this International Standard. For 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 possibilit
30、y of applying the most recent edition of the normative document indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 565, Test sieves Metal wire cloth, perf
31、orated metal plate and electroformed sheet Nominal sizes of openings 3 Term and definition For the purposes of this International 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
32、test portion is sieved under a stream of water, using standard-aperture sieves. NOTE Sieving under a stream of water gives truer results than a dry sieving method in which static electricity interferes. This method is particularly suited to emulsion resins. 5 Reagent 5.1 Wetting agent, for example a
33、 5 % to 10 % solution of sodium alkylsulfonate. ENISO1624:20012 6 Apparatus 6.1 Set of two sieves, diameter 200 mm to 300 mm, height 30 mm to 50 mm, having mesh sizes 0,063 mm and 0,250 mm, and fitted with deflectors to prevent loss of sample by spray (see Figure 1). NOTE Other mesh sizes may be use
34、d provided that the prescribed sieves are also used; new sieves are chosen from the series provided in ISO 565. 6.2 Balance, accurate to 0,01 g, range and size sufficient to accommodate the sieves and the filtered resin see 7.1 b). 6.3 Oven, capable of being maintained at 110 C 2 C. 6.4 Filter, plac
35、ed between the water supply tap and the apparatus, and intended to exclude impurities in the water supply. 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
36、the jets, e.g. by using jet apertures inclined at an angle to the 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
37、 on it during the sieving of resins. The water shall finally pass 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
38、of this International Standard. 6.6 Filter funnel or filter crucible with adaptor, diameter 40 mm and mean pore size 20 m to 40 m. 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,
39、 provided that a sprinkler device is fitted to each sieve (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 d
40、irectly on the sieve. The latter method requires the sieves to be resistant to repeated heating and cooling (for example, they should be constructed from stainless steel). ENISO1624:2001 3Key 1 Water 8 1-mm-thick slotted spray plate (ID 3 mm to 4 mm) 2 Flow-regulating valve 9 Sieve 3 Filter 10 Defle
41、ctor 4 Motor 11 Bowl with perforated bottom 5 Rotating joint 12 Dark-coloured dish 6 Pulley controlling spray plates 13 Stainless-steel sieve support 7 int. 3 mm to 10 mm Figure 1 Sketch of multiple-sieve spraying device ENISO1624:20014 7.2 Sieving If, at the end of the operation, it is desired to w
42、eigh the resin on the sieve, weigh the sieves to the nearest 0,1 g after drying them in the oven (6.3), at 110 C 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 t
43、ake the water 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 0,1 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 t
44、wo portions, each of approximately 50 ml, 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 i
45、t in with a 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
46、or several goes, 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
47、dark-coloured 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 2 C, and w
48、eigh to the nearest 0,1 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 2 C in the oven to constant mass. Weigh to the nearest 0,1 g after cooling in a desiccator.
