ISO INTERNATIONAL STANDARD 845 Third edition 2006-12-01 Cellular plastics and rubbers Determination of apparent density Caoutchoucs et plastiques alvéolaires Determination de la masse volumique apparente Reference number ISO 845:2006(E) @ ISO 2006 ISO 845:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The Iso Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation ? ISO2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either isO at the address below or IsO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ISO2006-All rightsreserved ISO 845:2006(E) Contents Page Foreword iv 1 Scope 2 Normative references 3 Terms and definitions. 4 Apparatus 5 Testspecimens 5.1 Dimensions... 5.2 Number of test specimens 5.3 Conditioning... 6 Procedure. 7 Expression of results 8 Accuracy 9 Test report alion'ghts reserved ili ISO 845:2006(E) 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 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 ISO 845 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 10, Cellular plastics. @ Iso 2006 - All rights reserved INTERNATIONAL STANDARD ISO 845:2006(E) Cellular plastics and rubbers Determination of apparent density 1 Scope This International Standard specifies a method for determining the apparent overall density and the apparent core density of cellular plastics and rubbers. If the material to be tested includes skins formed during a moulding/extrusion, the apparent overall density or the apparent core density, or both, can be determined. If the material does not have skins formed during moulding, the term "overall density" is not applicable. For shaped materials, a different method such as buoyancy method may be used. 2Normative 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 291, Plastics Standard atmospheres for conditioning and testing Iso 1923, Cellular plastics and rubbers — Determination of linear dimensions 3Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 apparent overall density (cellular material> mass per u