BS-ISO-22498-2005.pdf
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1、BRITISH STANDARD BS ISO 22498:2005 Plastics Vinyl chloride homopolymer and copolymer resins Particle size determination by mechanical sieving ICS 83.080.20 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 22498:2005 This British Stan
2、dard was published under the authority of the Standards Policy and Strategy Committee on 23 January 2006 BSI 23 January 2006 ISBN 0 580 47076 8 National foreword This British Standard reproduces verbatim ISO 22498:2005 and implements it as the UK national standard. The UK participation in its prepar
3、ation was entrusted to Technical Committee PRI/82, Thermoplastic materials, 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 which implement international publications referred t
4、o 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
5、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/European committee any enquiries on the interpretation, or pr
6、oposals for change, and keep 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 ISO title page, pages ii to iv, pages 1 to 5 and a back cover. The BSI copyrig
7、ht notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 22498:2005(E) INTERNATIONAL STAN
8、DARD ISO 22498 First edition 2005-07-15 Plastics Vinyl chloride homopolymer and copolymer resins Particle size determination by mechanical sieving Plastiques Rsines dhomopolymres et de copolymres de chlorure de vinyle Dtermination de la taille des particules par tamisage mcanique BS ISO 22498:2005 L
9、icensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Terms and defi
10、nitions. 1 4 Principle. 2 5 Materials 2 6 Apparatus 2 7 Procedure 2 8 Number of determinations. 3 9 Calculation and expression of results 3 10 Precision 4 11 Test report . 4 BS ISO 22498:2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI i
11、v 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 interested in a subject for which a
12、 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 Commission (IEC) on all matte
13、rs of electrotechnical standardization. International Standards are drafted in accordance with the 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 circula
14、ted 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 responsibl
15、e for identifying any or all such patent rights. ISO 22498 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic materials. BS ISO 22498:2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 1 Plastics Viny
16、l 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 s
17、election of sieves having meshes of various aperture sizes. The results can be expressed either in terms of the amount retained on the individual sieves or as the mean particle size for the whole test sample. The method is not recommended for use with sieves having mesh sizes smaller than 0,038 mm.
18、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 references, the latest edition of the referenced document (including any amendments) applies. ISO 565, Test sieves Metal
19、 wire cloth, perforated metal plate and electroformed sheet Nominal sizes of openings ISO 868, Plastics and ebonite Determination of indentation hardness by means of a durometer (Shore hardness) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1
20、 sieve retention percentage, by mass, of the resin test sample retained on a given sieve at the end of the test procedure 3.2 pan retention percentage, by mass, of the resin test sample retained in the pan at the bottom of the stack of sieves, or under a single sieve, at the end of the test procedur
21、e 3.3 mean particle size single value, expressed to the nearest 0,001 mm, representing the dominant particle of the whole test sample BS ISO 22498:2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:15:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 2 4 Principle A test sample of resin is s
22、ieved through a single sieve, or through a stack of sieves of various mesh sizes, assisted by mechanical shaking. When several sieves are chosen to form a stack, the sieves are assembled in ascending order of mesh size so that the largest mesh size is at the top. 5 Materials 5.1 Antistatic agent: al
23、uminium oxide powder, carbon black or equivalent. 5.2 Blocks of non-sticking rubber, with a Shore A hardness typically between 70 and 80, and with dimensions of approximately 40 mm 10 mm 15 mm. 6 Apparatus 6.1 Balance, accurate to 0,001 g. 6.2 Balance, accurate to 0,1 g, range and size sufficient to
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