BS ISO BRITISH STANDARD 22498:2005 Plastics Vinyl chloride homopolymer and copolymer resins - Particle size determination by mechanical sieving ICS 83.080.20 BSi NOCOPYINGWITHOUTBSIPERMISSIONEXCEPTASPERMITTEDBYCOPYRIGHTL British Standards BS ISO 22498:2005 National foreword This British Standard reproduces verbatim IS0 22498:2005 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee PRI/82, Thermoplastic materials, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep 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 obtained on request to its secretary. Cross-references The British Standards which implement international 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 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 ofitself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 5 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. This British Standard was Amendments issued since publication published under the authority of the Standards Policy and Amd. No. Date Strategy Committee Comments on23January2006 @ BSI 23 January 2006 ISBN 0 580 47076 8 BS ISO 22498:2005 INTERNATIONAL ISO STANDARD 22498 First edition 2005-07-15 Plastics Vinyl chloride homopolymer determination by mechanical sieving Plastiques - Résines d'homopolymeres et de copolymeres de chlorure de vinyle-Détermination de la taille des particules par tamisage mecanique Reference number ISO 22498:2005(E) = BS ISO 22498:2005 Contents Page Foreword 1 Scope. 2 Normative references 3 Terms and definitions 4 Principle... 5 Materials 6 Apparatus. 7 Procedure. 8 Number of determinations 9 Calculation and expression of results 10 Precision.. 11 Test report iii BS IS0 22498:2005 Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies technical committees. Each member body interested in a subject for which a technical committee has been 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 the rules given in the ISO/lEC 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 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 22498 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic materials iv BS ISO 22498:2005 Plastics Vinyl chloride homopolymer and copolymer resins Particle size determination by mechanical sieving 1 Scope This International Standard specifies a method for the determination of the size distribution of particles of vinyl chloride homopolymer and copolymer resins by measuring the amounts retained on a selectio