SIST EN ISO 845:2009
(Main)Cellular plastics and rubbers - Determination of apparent density (ISO 845:2006)
Cellular plastics and rubbers - Determination of apparent density (ISO 845:2006)
ISO 845:2006 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.
Schaumstoffe aus Kautschuk und Kunststoffen - Bestimmung der Rohdichte (ISO 845:2006)
Diese Internationale Norm beschreibt ein Verfahren zur Bestimmung der Stoffdichte und der Materialdichte
von Schaumstoffen aus Kunststoffen und Kautschuk.
Falls an dem zu prüfenden Material eine beim Formen/Extrudieren gebildete Schmelzhaut vorhanden ist,
kann/können die Stoffdichte und/oder die Materialdichte bestimmt werden. Falls das Material keine Schmelzhaut
aufweist, darf die Benennung „Stoffdichte“ nicht verwendet werden.
Für umgeformte Materialien darf ein anderes Verfahren angewendet werden, z. B. das Auftriebsverfahren.
Caoutchoucs et plastiques alvéolaires - Détermination de la masse volumique apparente (ISO 845:2006)
L'ISO 845:2006 spécifie une méthode pour la détermination de la masse volumique globale et de la masse volumique apparente de la partie intérieure («âme») des caoutchoucs et des plastiques alvéolaires.
Si le matériau soumis à essai comprend des peaux formées en cours de moulage ou d'extrusion, on peut déterminer la masse volumique apparente globale ou la masse volumique de l'âme, ou les deux. Si le matériau ne comporte pas de peaux formées pendant le moulage ou l'extrusion, le terme «masse volumique globale» n'est pas applicable.
Penjeni polimerni materiali in gume - Določevanje navidezne gostote (ISO 845:2006)
General Information
- Status
- Published
- Publication Date
- 01-Sep-2009
- Technical Committee
- IPMA - Polimer materials and products
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 02-Sep-2009
- Due Date
- 07-Nov-2009
- Completion Date
- 02-Sep-2009
Relations
- Replaces
SIST ISO 845:1996 - Cellular plastics and rubbers -- Determination of apparent (bulk) density - Effective Date
- 01-Mar-2015
- Effective Date
- 01-Oct-2009
- Effective Date
- 28-Jan-2026
- Referred By
SIST EN 60695-11-20:2015 - Fire hazard testing - Part 11-20: Test flames - 500 W flame test methods - Effective Date
- 09-Feb-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
Overview
SIST EN ISO 845:2009 – Cellular plastics and rubbers – Determination of apparent density (ISO 845:2006) – defines a standardized procedure for determining the apparent overall density and the apparent core density of cellular plastics and rubbers. This European Standard facilitates consistent testing and reporting across industries by specifying how density measurements are to be conducted for cellular materials, whether or not they possess skins formed during moulding or extrusion.
Understanding the density of cellular plastics and rubbers is critical for evaluating product quality, performance, and compliance in manufacturing and quality assurance workflows.
Key Topics
- Apparent Overall Density: Refers to the mass per unit volume of a sample including all skins formed during the moulding process. Applicable where a skin is present.
- Apparent Core Density: Characterizes the density after removal of moulded skins, allowing assessment of the core material properties.
- Sample Preparation: Test specimens must be large enough for accurate measurements, with a minimum volume of 100 cm³. Specimens should be conditioned for stability and tested after a waiting period post-manufacture.
- Measurement Method: The standard outlines procedures for measuring specimen dimensions (in accordance with ISO 1923) and mass with high accuracy to calculate density.
- Test Conditions: Conditioning in standard atmospheres (as defined in ISO 291) is required to ensure comparable results.
- Statistical Reporting: Results must include mean density and standard deviation, providing a robust data set for quality assessment.
- Skin Presence: For materials without skins (as formed during manufacturing), the determination of "overall density" is not applicable-only "core density" is measured.
Applications
The method specified in SIST EN ISO 845:2009 is widely used for:
- Quality Control: Manufacturers of foam, insulation panels, or elastomeric rubbers rely on accurate density measurement to verify consistency, structural integrity, and compliance with product requirements.
- Research and Development: Materials scientists employ this standard to compare new cellular material formulations and optimize their properties.
- Regulatory Compliance: Industries such as automotive, aerospace, and construction implement this standard to meet mandatory specifications and ensure safety and performance.
- Product Identification: Apparent density can indicate correct material specification, detect defects, or identify process anomalies in finished goods.
- Comparative Analysis: Enables benchmarking between different batches, suppliers, or manufacturing techniques by providing a uniform approach to density determination.
Related Standards
For organizations implementing SIST EN ISO 845:2009, the following related standards may also be relevant:
- ISO 291 – Plastics – Standard atmospheres for conditioning and testing: Specifies environmental control for pre-test specimen conditioning.
- ISO 1923 – Cellular plastics and rubbers – Determination of linear dimensions: Establishes dimensional measurement procedures required by ISO 845.
- EN ISO 845:1995 (superseded by the 2009 edition): Earlier version, replaced for technical alignment.
Adhering to these reference standards helps ensure the validity and comparability of test results when determining the apparent density of cellular materials.
By standardizing the process for apparent density determination of cellular plastics and rubbers, SIST EN ISO 845:2009 supports manufacturers, quality control laboratories, and regulatory agencies in achieving reliable product characterization and maintaining high standards across various industries.
Get Certified
Connect with accredited certification bodies for this standard
DIN CERTCO
DIN Group product certification.
Smithers Quality Assessments
US management systems and product certification.
Sponsored listings
Frequently Asked Questions
SIST EN ISO 845:2009 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Cellular plastics and rubbers - Determination of apparent density (ISO 845:2006)". This standard covers: ISO 845:2006 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.
ISO 845:2006 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.
SIST EN ISO 845:2009 is classified under the following ICS (International Classification for Standards) categories: 83.100 - Cellular materials. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 845:2009 has the following relationships with other standards: It is inter standard links to SIST ISO 845:1996, SIST EN ISO 845:1999, SIST EN 420:1996, SIST EN 60695-11-20:2015, SIST EN 253:2020, SIST EN 15330-4:2023, SIST EN 15947-4:2016, SIST EN 14882:2006, SIST EN 17415-1:2020, SIST EN 14574:2005, SIST EN 489:2009, SIST EN 15772:2012, SIST EN 1307:2009, SIST EN 12733:2018, SIST EN 15632-1:2022. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN ISO 845:2009 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Schaumstoffe aus Kautschuk und Kunststoffen - Bestimmung der Rohdichte (ISO 845:2006)Caoutchoucs et plastiques alvéolaires - Détermination de la masse volumique apparente (ISO 845:2006)Cellular plastics and rubbers - Determination of apparent density (ISO 845:2006)83.100Penjeni polimeriCellular materialsICS:Ta slovenski standard je istoveten z:EN ISO 845:2009SIST EN ISO 845:2009en,fr,de01-oktober-2009SIST EN ISO 845:2009SLOVENSKI
STANDARDSIST EN ISO 845:19991DGRPHãþD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 845June 2009ICS 83.100Supersedes EN ISO 845:1995
English VersionCellular plastics and rubbers - Determination of apparent density(ISO 845:2006)Caoutchoucs et plastiques alvéolaires - Détermination de lamasse volumique apparente (ISO 845:2006)Schaumstoffe aus Kautschuk und Kunststoffen -Bestimmung der Rohdichte (ISO 845:2006)This European Standard was approved by CEN on 30 May 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 845:2009: ESIST EN ISO 845:2009
Reference numberISO 845:2006(E)© ISO 2006
INTERNATIONAL STANDARD ISO845Third edition2006-12-01Cellular plastics and rubbers — Determination of apparent density Caoutchoucs et plastiques alvéolaires — Détermination de la masse volumique apparente
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 parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
©
ISO 2006 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
copyright@iso.org Web
www.iso.org Published in Switzerland
ii
ISO 845:2006(E) © ISO 2006 – All rights reserved
iiiContents Page Foreword.iv 1 Scope.1 2 Normative references.1 3 Terms and definitions.1 4 Apparatus.1 5 Test specimens.2 5.1 Dimensions.2 5.2 Number of test specimens.2 5.3 Conditioning.2 6 Procedure.2 7 Expression of results.3 8 Accuracy.3 9 Test report.4
ISO 845:2006(E) iv
...