prEN ISO 1183-2
(Main)Plastics - Methods for determining the density of non-cellular plastics - Part 2: Density gradient column method (ISO/DIS 1183-2:2025)
Plastics - Methods for determining the density of non-cellular plastics - Part 2: Density gradient column method (ISO/DIS 1183-2:2025)
This document specifies a gradient column method for the determination of the density of non-cellular moulded or extruded plastics or pellets in void-free form. Density gradient columns are columns containing a mixture of two liquids, the density in the column increasing uniformly from top to bottom.
NOTE Density is frequently used to follow variations in physical structure or composition of plastic materials. Density can also be useful in assessing the uniformity of samples or specimens. The density of plastic materials can depend upon the choice of specimen preparation method. When this is the case, precise details of the specimen preparation method are intended to be included in the appropriate material specification.
Kunststoffe - Verfahren zur Bestimmung der Dichte von nicht verschäumten Kunststoffen - Teil 2: Verfahren mit Dichtegradientensäule (ISO/DIS 1183‑2:2025)
Plastiques - Méthodes de détermination de la masse volumique des plastiques non alvéolaires - Partie 2: Méthode de la colonne à gradient de masse volumique (ISO/DIS 1183-2:2025)
Le présent document spécifie une méthode qui utilise une colonne à gradient pour déterminer la masse volumique des plastiques non alvéolaires, moulés ou extrudés, ou de granulés exempts de cavités fermées. Les colonnes à gradient de masse volumique contiennent un mélange de deux liquides, dont la masse volumique augmente uniformément du haut de la colonne vers le bas.
NOTE La masse volumique est fréquemment utilisée pour suivre les variations de la structure physique ou de la composition des matériaux plastiques. La masse volumique peut également se révéler utile pour évaluer l'uniformité des échantillons ou des éprouvettes. La masse volumique des matériaux plastiques peut dépendre du choix de la méthode de préparation de l'échantillon. Lorsque cela est applicable, des détails précis de la méthode de préparation de l'échantillon doivent être donnés dans les spécifications appropriées relatives à la matière.
Polimerni materiali - Metode za določanje gostote nepenjenih polimernih materialov - 2. del: Kolonska metoda na osnovi gradienta gostote (ISO/DIS 1183-2:2025)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2025
Polimerni materiali - Metode za določanje gostote nepenjenih polimernih
materialov - 2. del: Kolonska metoda na osnovi gradienta gostote (ISO/DIS 1183-
2:2025)
Plastics - Methods for determining the density of non-cellular plastics - Part 2: Density
gradient column method (ISO/DIS 1183-2:2025)
Kunststoffe - Verfahren zur Bestimmung der Dichte von nicht verschäumten Kunststoffen
- Teil 2: Verfahren mit Dichtegradientensäule (ISO/DIS 1183-2:2025)
Plastiques - Méthodes de détermination de la masse volumique des plastiques non
alvéolaires - Partie 2: Méthode de la colonne à gradient de masse volumique (ISO/DIS
1183-2:2025)
Ta slovenski standard je istoveten z: prEN ISO 1183-2
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
DRAFT
International
Standard
ISO/DIS 1183-2
ISO/TC 61/SC 5
Plastics — Methods for determining
Secretariat: DIN
the density of non-cellular
Voting begins on:
plastics —
2025-03-11
Part 2:
Voting terminates on:
2025-06-03
Density gradient column method
Plastiques — Méthodes de détermination de la masse volumique
des plastiques non alvéolaires —
Partie 2: Méthode de la colonne à gradient de masse volumique
ICS: 83.080.01
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
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PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 1183-2:2025(en)
DRAFT
ISO/DIS 1183-2:2025(en)
International
Standard
ISO/DIS 1183-2
ISO/TC 61/SC 5
Plastics — Methods for determining
Secretariat: DIN
the density of non-cellular
Voting begins on:
plastics —
Part 2:
Voting terminates on:
Density gradient column method
Plastiques — Méthodes de détermination de la masse volumique
des plastiques non alvéolaires —
Partie 2: Méthode de la colonne à gradient de masse volumique
ICS: 83.080.01
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
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Published in Switzerland Reference number
ISO/DIS 1183-2:2025(en)
ii
ISO/DIS 1183-2:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Conditioning . 2
5 Method . 2
5.1 Apparatus .2
5.2 Immersion liquids .2
5.3 Specimens .3
5.4 Procedure .3
5.4.1 Preparation and calibration of glass floats .3
5.4.2 Preparation of density gradient column .3
5.4.3 Measurement of density .3
5.4.4 Calculations . .4
6 Test report . 4
Annex A (informative) Liquid systems suitable for density determinations . 6
Annex B (informative) Preparation of density gradient column . 7
Bibliography .11
iii
ISO/DIS 1183-2:2025(en)
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 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 matters of electrotechnical standardization.
The procedures used to develop this document and those 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 (see 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 document 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 voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL:
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-
chemical properties.
This third edition cancels and replaces the second edition (ISO 1183-2:2019), which has been technically
revised. The main changes compared to the previous edition are as follows:
— reference to this document, any deviations and any unusual features observed have been added to the
test report.
A list of all parts in the ISO 1183 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
DRAFT International Standard ISO/DIS 1183-2:2025(en)
Plastics — Methods for determining the density of non-
cellular plastics —
Part 2:
Density gradient column method
WARNING — The use of this document may involve hazardous materials, operations or equipment.
This document does not purport to address all of the safety problems, if any, associated with its
use. It is the responsibility of the user of this document to establish appropriate health and safety
practices.
1 Scope
This document specifies a gradient column method for the determination of the density of non-cellular
moulded or extruded plastics or pellets in void-free form. Density gradient columns are columns containing
a mixture of two liquids, the density in the column increasing uniformly from top to bottom.
NOTE Density is frequently used to follow variations in physical structure or composition of plastic materials.
Density can also be useful in assessing the uniformity of samples or specimens. The density of plastic materials
can depend upon the choice of specimen preparation method. When this is the case, precise details of the specimen
preparation method are intended to be included in the appropriate material specification.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements 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 1183-1, Plastics — Methods for determining the density of non-cellular plastics — Part 1: Immersion method,
liquid pycnometer method and titration method
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
density
ρ
3 3 3
ratio of the mass m of a sample to its volume V (at the temperature T) expressed in kg/m , kg/dm (g/cm ),
or kg/l (g/ml)
[1]
Note 1 to entry: The following terms, based upon ISO 80000-4 , are given in Table 1 for clarification.
ISO/DIS 1183-2:2025(en)
Table 1 — Density terms
Term Symbol Formulation Units
kg/m
3 3
Density ρ m/V kg/dm (g/cm )
kg/l (g/ml)
m /kg
3 3
Specific volume ν V/m (= 1/ρ) dm /kg (cm /g)
l/kg (ml/g)
4 Conditioning
Conditioning and testing shall be in accordance with ISO 291 or the appropriate material standard. In
general, conditioning specimens to constant temperature is not required, because the determination itself
brings the specimen to the constant temperature of the test.
Specimens which change in density during the test to such an extent that the change is greater than the
required accuracy of the density determination shall be conditioned prior to measurement in accordance
with the applicable material specification. When changes in density with time or atmospheric conditions are
the primary purpose of the measurements, the specimens shall be conditioned as described in the material
specification and, if no material specification exists, then as agreed upon by the interested parties.
5 Method
5.1 Apparatus
5.1.1 Density gradient column, consisting of a suitable graduated column, not less than 40 mm in
diameter, with a cover. The height of the column shall be compatible with the accuracy required. A graduation
interval of 1 mm for the scale on the column is normal.
5.1.2 Liquid bath, capable of bei
...
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