1、BSI Standards PublicationBS ISO 23900-1:2015Pigments and extenders Methods of dispersion andassessment of dispersibility inplasticsPart 1: General introductionBS ISO 23900-1:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 23900-1:2015.The UK participation
2、in its preparation was entrusted to Technical Committee STI/1, Pigments.A list of organizations represented on this committee 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 app
3、lication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 86261 8 ICS 87.060.10 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy C
4、ommittee on 30 April 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e d ISO 2015Pigments and extenders Methods of dispersion and assessment of dispersibility in plastics Part 1: General introductionPigments et matires de charge Mthodes de dispersion et valuation de lapti
5、tude la dispersion dans les plastiques Partie 1: GnralitsINTERNATIONAL STANDARDISO 23900-1First edition 2015-05-01Reference number ISO 23900-1:2015(E)BS ISO 23900-1:2015ISO 23900-1:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015All rights reserved. Unless otherwise specif
6、ied, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO
7、s member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 23900-1:2015ISO 23900-1:2015(E)Foreword iv1 Scope . 12 Normative references 13 Terms and
8、definitions . 14 Methods of dispersion and methods of assessment 24.1 Preliminary agreements . 24.2 Plastics materials 24.3 Methods of dispersion 24.4 Methods of assessment 25 Procedures 35.1 Determination of colouristic properties and ease of dispersion in plasticized polyvinyl chloride by two-roll
9、 milling . 35.2 Determination of colouristic properties and ease of dispersion of black and colour pigments in polyethylene by two-roll milling 35.3 Determination of colouristic properties and ease of dispersion of white pigments in polyethylene by two-roll milling . 35.4 Determination of dispersibi
10、lity of pigments by filter pressure value test 35.5 Determination of dispersibility of pigments by film test . 36 Precision . 3 ISO 2015 All rights reserved iiiContents PageBS ISO 23900-1:2015ISO 23900-1:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federatio
11、n 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 technical committee has been established has the right to be represented on that committee.
12、 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 matters of electrotechnical standardization.The procedures used to develop this document and thos
13、e intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (s
14、ee www.iso.org/directives).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. Details of any patent rights identified during the development of the docu
15、ment will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and
16、expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT), see the following URL: Foreword Supplementary information .The committee responsible for this document is ISO/TC 256, Pigments, dyestuffs and exte
17、nders.ISO 23900 consists of the following parts, under the general title Pigments and extenders Methods of dispersion and assessment of dispersibility in plastics: Part 1: General introduction Part 2: Determination of colouristic properties and ease of dispersion in plasticized polyvinyl chloride by
18、 two-roll milling Part 3: Determination of colouristic properties and ease of dispersion of black and colour pigments in polyethylene by two-roll milling Part 4: Determination of colouristic properties and ease of dispersion of white pigments in polyethylene by two-roll milling Part 5: Determination
19、 by filter pressure value test Part 6: Determination by film testiv ISO 2015 All rights reservedBS ISO 23900-1:2015Pigments and extenders Methods of dispersion and assessment of dispersibility in plastics Part 1: General introduction1 ScopeThis part of ISO 23900 provides an introduction to the vario
20、us parts of ISO 23900 which describe methods for dispersing pigments and extenders in plastics materials in order to determine their dispersion characteristics and colouristic properties.Methods of assessing dispersion characteristics are described in the subsequent parts of ISO 23900.The various pr
21、ocedures described permit comparison to be made between similar pigments (for example between a test sample and an agreed reference pigment). The results provide an indication of relative dispersibility under practical conditions of use, provided that the test procedure and plastics material selecte
22、d are appropriate.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (in
23、cluding any amendments) applies.ISO 23900-2, Pigments and extenders Methods of dispersion and assessment of dispersibility in plastics Part 2: Determination of colouristic properties and ease of dispersion in plasticized polyvinyl chloride by two-roll millingISO 23900-3, Pigments and extenders Metho
24、ds of dispersion and assessment of dispersibility in plastics Part 3: Determination of colouristic properties and ease of dispersion of black and colour pigments in polyethylene by two-roll millingISO 23900-4, Pigments and extenders Methods of dispersion and assessment of dispersibility in plastics
25、Part 4: Determination of colouristic properties and ease of dispersion of white pigments in polyethylene by two-roll millingISO 23900-5, Pigments and extenders - Methods of dispersion and assessment of dispersibility in plastics Part 5: Determination by filter pressure value testISO 23900-6, Pigment
26、s and extenders - Methods of dispersion and assessment of dispersibility in plastics Part 6: Determination by film test3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.INTERNATIONAL STANDARD ISO 23900-1:2015(E) ISO 2015 All rights reserved 1BS ISO 2
27、3900-1:2015ISO 23900-1:2015(E)3.1dispersibilityease and extent to which pigments or extenders can, by wetting, elimination of air and by mechanical disagglomeration, be distributed homogeneously in a plastics material under standardized conditions of processingNote 1 to entry: Dispersibility is gene
28、rally assessed in terms of colour strength development, colouristic properties and frequency and size of agglomerates.3.2ease of dispersionDHmeasure of the rate at which or the degree to which a pigment or extender achieves a given level of dispersion when dispersed in a plastics material3.3aggregat
29、eprimary particles so joined together that they cannot be broken down during normal pigment/extender dispersing processes3.4agglomerateprimary particles or aggregates or a mixture of the two so joined together that they may be broken down during normal pigment/extender dispersing processes4 Methods
30、of dispersion and methods of assessment4.1 Preliminary agreementsAgreement shall be reached between the interested parties on:a) the plastics material to be used;b) the method of dispersion;c) the assessment method;as all of these influence the results.4.2 Plastics materialsA large variety of plasti
31、cs materials is available with greatly differing properties. It is therefore not possible, in this part of ISO 23900, to stipulate which plastics material shall be used. In other parts of ISO 23900, general indications are given as to the relevance of the procedures described to the most commonly us
32、ed plastics materials.4.3 Methods of dispersionThere are many differences in the equipment and processing conditions used in practice for dispersing pigments and extenders in plastics materials. It is therefore not possible to specify a single procedure for dispersing a pigment for testing purposes.
33、 In other parts of ISO 23900, general indications are given as to the relevance in practice of the procedure described.4.4 Methods of assessmentThere are different methods of characterizing dispersibility of pigments in plastics materials. These are specified in the relevant parts of ISO 23900.2 ISO
34、 2015 All rights reservedBS ISO 23900-1:2015ISO 23900-1:2015(E)5 Procedures5.1 Determination of colouristic properties and ease of dispersion in plasticized polyvinyl chloride by two-roll millingUsing a two-roll mill, the pigment under test is dispersed at (160 5) C in the basic compound. The milled
35、 sheet obtained in this way is then subjected to the higher shearing forces resulting from two-roll milling at (130 5) C. The resulting increase in colour strength is a measure of the ease of dispersion DHPVC-P.The detailed procedure is specified in ISO 23900-2.5.2 Determination of colouristic prope
36、rties and ease of dispersion of black and colour pigments in polyethylene by two-roll millingUsing a two-roll mill, the pigment under test is dispersed at an appropriate temperature in the polymer. The milled sheet obtained in this way is then subjected to the higher shearing forces resulting from t
37、wo-roll milling at a narrower gap width. The resulting increase in colour strength is a measure of the ease of dispersion DHPE.The detailed procedure is specified in ISO 23900-3.5.3 Determination of colouristic properties and ease of dispersion of white pigments in polyethylene by two-roll millingUs
38、ing a two-roll mill, the pigment under test is dispersed at an appropriate temperature in the polymer. The milled sheet obtained in this way is then subjected to the higher shearing forces resulting from two-roll milling at a narrower gap width. The resulting increase in tinting strength is a measur
39、e of the ease of dispersion DHPE.The detailed procedure is specified in ISO 23900-4.5.4 Determination of dispersibility of pigments by filter pressure value testThe increase in pressure when pressing a pigmented polymer of defined composition through a filter pack in an extruder under defined condit
40、ions is a measure of the dispersibility of the pigment under test.The detailed procedure is specified in ISO 23900-5.5.5 Determination of dispersibility of pigments by film testThe assessment based on the size and frequency of agglomerates in a pigmented polymer film of defined composition and thick
41、ness is a measure of the dispersibility of the pigment under test. The method can be used both for transparent and non-transparent films.The detailed procedure is specified in ISO 23900-6.6 PrecisionStatements on precision of the methods are given in the subsequent parts of ISO 23900. These will gen
42、erally be limited by the dependence of the results on the choice of plastics material and the method of dispersion employed. ISO 2015 All rights reserved 3BS ISO 23900-1:2015ISO 23900-1:2015(E) ISO 2015 All rights reservedICS 87.060.10Price based on 3 pagesThis page deliberately left blankBSI is the
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