ISO 24453:2008

INTERNATIONAL ISO
STANDARD 24453
First edition
2008-05-01
Rubber — Acquisition and presentation
of comparable single-point data
Caoutchouc — Acquisition et présentation de données simples
comparables
Reference number
©
ISO 2008
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ii © ISO 2008 – All rights reserved

Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 3
4 Test piece preparation. 3
5 Conditioning. 3
6 Processability properties. 4
7 Test requirements. 4
8 Presentation of results. 5
Bibliography . 8

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
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International Electrotechnical Commission (IEC) on all matters 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 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
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 24453 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee
SC 2, Testing and analysis.
iv © ISO 2008 – All rights reserved

INTERNATIONAL STANDARD ISO 24453:2008(E)

Rubber — Acquisition and presentation of comparable
single-point data
1 Scope
This International Standard identifies specific test procedures for the acquisition and presentation of
comparable single-point data for properties of rubber compounds. In general, each property is specified by a
single test method and a single experimental value although, in certain cases, properties may be represented
by more than one value obtained under different test conditions. The properties presented are those used to
characterize processing properties, those most often quoted by manufacturers and in material specifications,
and those relevant to more specific applications. An important application of this International Standard
consists in helping different suppliers produce material specification sheets in which the same set of
properties is measured using the same conditions.
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 34-1, Rubber, vulcanized or thermoplastic — Determination of tear strength — Part 1: Trouser, angle and
crescent test pieces
ISO 36, Rubber, vulcanized or thermoplastic — Determination of adhesion to textile fabric
ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD and
100 IRHD)
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 289-1, Rubber, unvulcanized — Determinations using a shearing-disc viscometer — Part 1:
Determination of Mooney viscosity
ISO 289-2, Rubber, unvulcanized — Determinations using a shearing-disc viscometer — Part 2:
Determination of pre-vulcanization characteristics
ISO 812, Rubber, vulcanized or thermoplastic— Determination of low-temperature brittleness
ISO 813, Rubber, vulcanized or thermoplastic — Determination of adhesion to a rigid substrate — 90° peel
method
ISO 815-1, Rubber, vulcanized or thermoplastic — Determination of compression set at ambient, elevated or
low temperatures — Part 1: At ambient or elevated temperatures
ISO 815-2, Rubber, vulcanized or thermoplastic — Determination of compression set at ambient, elevated or
low temperatures — Part 2: At low temperatures
ISO 1431-1, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and
dynamic strain testing
ISO 1432, Rubber, vulcanized or thermoplastic — Determination of low temperature stiffening (Gehman test)
ISO 1817, Rubber, vulcanized — Determination of the effects of liquids
ISO 1827, Rubber, vulcanized or thermoplastic — Determination shear modulus adhesion to rigid plates —
Quadruple-shear method
ISO 1853, Conducting and dissipative rubbers, vulcanized or thermoplastic — Measurement of resistivity
ISO 2007, Rubber, unvulcanized — Determination of plasticity — Rapid-plastimeter method
ISO 2285, Rubber, vulcanized or thermoplastic — Determination of tension set under constant elongation, and
of tension set, elongation and creep under constant tensile load
ISO 2393, Rubber test mixes — Preparation, mixing and vulcanization — Equipment and procedures
ISO 2781, Rubber, vulcanized and thermoplastic — Determination of density
ISO 2782, Rubber, vulcanized or thermoplastic — Determination of permeability to gases
ISO 2921, Rubber, vulcanized — Determination of low-temperature characteristics — Temperature-retraction
procedure (TR test)
ISO 3384, Rubber, vulcanized or thermoplastic — Determination of stress relaxation in compression at
ambient and elevated temperatures
ISO 3387, Rubber — Determination of crystallization effects by hardness measurements
ISO 3865, Rubber, vulcanized or thermoplastic — Methods of test for staining in contact with organic material
ISO 4649, Rubber, vulcanized or thermoplastic — Determination of abrasion resistance using a rotating
cylindrical drum device
ISO 4662, Rubber — Determination of rebound resilience of vulcanizates
ISO 4666-3, Rubber, vulcanized — Determination of temperature rise and resistance to fatigue in flexometer
testing — Part 3: Compression flexometer
ISO 6179, Rubber, vulcanized or thermoplastic — Rubber sheets and rubber-coated fabrics — Determination
of transmission rate of volatile liquids (gravimetric technique)
ISO 6502, Rubber — Guide to the use of curemeters
ISO 7743, Rubber, vulcanized or thermoplastic – Determination of compression stress-strain properties
ISO 8013, Rubber, vulcanized — Determination of creep in compression or shear
ISO 9026, Raw rubber or unvulcanized compounds — Determination of green strength
ISO 11345, Rubber — Assessment of carbon black and carbon black/silica dispersion — Rapid comparative
methods
ISO 15113, Rubber — Determination of frictional properties
ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test
methods
2 © ISO 2008 – All rights reserved

IEC 60093, Methods of test for volume resistivity and surface resistivity of solid electrical insulating materials
BS 903:A18, Physical testing of rubber — Part A18: Determination of equilibrium water vapour absorption
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
single-point data
data characterizing a rubber material by means of those property tests in which important aspects of
performance can be described with single-value results
4 Test piece preparation
Where relevant, materials for test shall be prepared, mixed and moulded following the general principles given
in ISO 2393.
The detailed conditions used shall be as recommended by the manufacturer of the rubber compound and
shall, for each of the processing steps, be the same for each test piece except that different cure times may
be used for different sized test pieces.
The equipment, mixing cycle and conditions used for moulding shall be given in the test report.
The final preparation of test pieces (for example stamping from sheet) shall be in accordance with the relevant
test method standard.
The properties of a rubber compound can vary depending on the processing procedures used and this should
be taken into account when comparing materials.
To maximize the usefulness of results, processing conditions should be representative of those used in
production.
5 Conditioning
The time between mixing and moulding shall be between 24 h and one week.
The time between moulding and conditioning shall be between 16 h and four weeks. Recommendations for
the storage of vulcanized rubber products are given in ISO 2230.
Test pieces shall be conditioned in accordance with the relevant test method standard. Where this refers to
standard laboratory conditions of temperature and/or humidity, these are taken to mean (23 ± 2) °C and
50 % RH.
NOTE If tests are carried out at the alternative standard laboratory temperature of (27 ± 2) °C, the results will not be
strictly comparable unless adjusted by the known relationship of the property with temperature.
For tests at temperatures other than (23 ± 2) °C, where specific instructions are not included in the test
method standard, condition the test pieces at the temperature at which the test is to be conducted for a period
sufficient to enable test pieces to attain substantial equilibrium in accordance with ISO 23529.
Details of the conditioning used shall be given in the test report.
6 Processability properties
If processability data are required (for example if unvulcanized material is being supplied), the test methods,
test conditions and units shall be selected from those specified in Table 1.
The test temperature(s) shall be as considered appropriate for the material in question.
NOTE The measurement of viscoelastic flow and cure properties of rubber compounds is essential for the processor
in order to form the material efficiently and effectively into the required product. However, these properties are generally of
little consequence for the end user of the product and it is for this reason that processability properties are considered
separately to other properties in this International Standard.
Table 1 — Test methods for processability data
International
Property Symbol Unit Test conditions
Standard
1.1 Mooney viscosity See ISO 289-1 ISO 289-1 Mooney units Large rotor
t
1.2 Mooney scorch time ISO 289-2 min Rise of 5 MU
x
2.1 Rapid plasticity number ISO 2007 0,01 mm
Time to 90 % cure
t´ (90)
3.1
ISO 6502 min
c
(The cure curve is normally
presented.)
t´ (50) Preference is given to an
3.2
Time to 50 % cure ISO 6502 min
c
oscillating die instrument.
t
3.3 Scorch time ISO 6502 min The temperature is selected
sx
according to the compound
M
3.4 Minimum torque ISO 6502 Nm
L and expected processing
conditions.
Plateau torque
M
HF
(Maximum torque or torque
3.5 ISO 6502 Nm
after a specified time, if (M or M )
HR H
appropriate)
Green strength (yield or Use beaded type 1 test
4.1 ISO 9026 MPa
maximum stress) piece.
4.2 Carbon black dispersion ISO 11345 Dimensionless Method A or B

7 Test requirements
The test methods, test conditions and units specified in Table 2 shall be used when determining data
according to this International Standard.
A property may be omitted if it is not relevant to th
...