EN ISO 8067:2008
(Main)Flexible cellular polymeric materials - Determination of tear strength (ISO 8067:2008)
Flexible cellular polymeric materials - Determination of tear strength (ISO 8067:2008)
ISO 8067:2008 specifies two methods for the determination of the tear strength of flexible cellular polymeric materials:
method A, using a trouser test piece;
method B, using an angle test piece without a nick.
Flexible Polymer-Schaumstoffe - Bestimmung des Weiterreißwiderstands (ISO 8067:2008)
Diese Internationale Norm legt zwei Verfahren zur Bestimmung des Weiterreißwiderstands von flexiblen Polymer Schaumstoffen fest:
Verfahren A, bei dem ein Hosen Probekörper angewendet wird;
Verfahren B, bei dem ein Winkel Probekörper ohne Einschnitt angewendet wird.
Matériaux polymères alvéolaires souples - Détermination de la résistance au déchirement (ISO 8067:2008)
L'ISO 8067:2008 spécifie deux méthodes pour la détermination de la résistance au déchirement des matériaux polymères alvéolaires souples:
la méthode A, utilisant une éprouvette pantalon;
la méthode B, utilisant une éprouvette angulaire sans entaille.
Penjeni polimerni materiali - Določevanje pretržne trdnosti (ISO 8067:2008)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2009
1DGRPHãþD
SIST EN ISO 8067:1999
3HQMHQLSROLPHUQLPDWHULDOL'RORþHYDQMHSUHWUåQHWUGQRVWL ,62
Flexible cellular polymeric materials - Determination of tear strength (ISO 8067:2008)
Flexible Polymer-Schaumstoffe - Bestimmung des Weiterreißwiderstands (ISO
8067:2008)
Matériaux polymeres alvéolaires souples - Détermination de la résistance au
déchirement (ISO 8067:2008)
Ta slovenski standard je istoveten z: EN ISO 8067:2008
ICS:
83.100 Penjeni polimeri Cellular materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 8067
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2008
ICS 83.100 Supersedes EN ISO 8067:1995
English Version
Flexible cellular polymeric materials - Determination of tear
strength (ISO 8067:2008)
Matériaux polymères alvéolaires souples - Détermination Flexible Polymer-Schaumstoffe - Bestimmung des
de la résistance au déchirement (ISO 8067:2008) Weiterreißwiderstands (ISO 8067:2008)
This European Standard was approved by CEN on 15 November 2008.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards 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 translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official 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 STANDARDIZATION
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EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8067:2008: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
This document (EN ISO 8067:2008) has been prepared by Technical Committee ISO/TC 45 "Rubber and
rubber products" in collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is
held by NBN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by June 2009, and conflicting national standards shall be withdrawn at
the latest by June 2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 8067:1995.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: 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 the United Kingdom.
Endorsement notice
The text of ISO 8067:2008 has been approved by CEN as a EN ISO 8067:2008 without any modification.
INTERNATIONAL ISO
STANDARD 8067
Second edition
2008-12-01
Flexible cellular polymeric materials —
Determination of tear strength
Matériaux polymères alvéolaires souples — Détermination de la
résistance au déchirement
Reference number
ISO 8067:2008(E)
©
ISO 2008
ISO 8067:2008(E)
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ii © ISO 2008 – All rights reserved
ISO 8067:2008(E)
Contents Page
Foreword. iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Apparatus . 1
5 Test pieces . 2
6 Number of test pieces . 4
7 Conditioning. 4
8 Procedure . 4
9 Expression of results . 6
10 Test report . 6
Annex A (informative) Precision comparison for the two types of test piece . 7
ISO 8067:2008(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
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.
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 8067 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee
SC 4, Products (other than hoses).
This second edition cancels and replaces the first edition (ISO 8067:1989), which has been technically revised
to include a second method, using an angle test piece, in addition to the existing method which uses a trouser
test piece.
iv © ISO 2008 – All rights reserved
INTERNATIONAL STANDARD ISO 8067:2008(E)
Flexible cellular polymeric materials — Determination of tear
strength
WARNING — Persons using this International Standard should be familiar with normal laboratory
practice. This standard does not purport to address all of the safety problems, if any, associated with
its use. It is the responsibility of the user to establish appropriate safety and health practices and to
ensure compliance with any national regulatory conditions.
1 Scope
This International Standard specifies two methods for the determination of the tear strength of flexible cellular
polymeric materials:
⎯ method A, using a trouser test piece;
⎯ method B, using an angle test piece without a nick.
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 1923, Cellular plastics and rubbers — Determination of linear dimensions
ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Verification and calibration of the force-measuring system
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
tear strength
R
maximum force per unit thickness observed when stretching a test piece to rupture
4 Apparatus
The tear strength shall be measured on a tensile-testing machine which will indicate the force at which rupture
of the test piece takes place. An automatic machine should preferably be used which draws the actual curve,
or a stylus or scale should be used having an indicator that remains at the point of maximum force after
rupture of the test piece.
The accuracy of the test machine shall be class 2 or better as defined in ISO 7500-1.
ISO 8067:2008(E)
5 Test pieces
5.1 General
The test pieces shall be free of skin, voids and flow lines. If the material exhibits a predominant direction of
cellular structure (orientation of the cells), the trouser test piece shall be taken in such a way that the plane of
the cut subsequently made in the test piece (see Figure 1) is parallel to, and the long dimension of the cut
perpendicular to, the predominant foam-rise direction and the angle test piece shall be taken in such a way
that the plane of the V-shaped side of the test piece (see Figure 3) is parallel to, and the long dimension of the
test piece perpendicular to, the predominant foam-rise direction. If this is not possible, the orientation of the
long dimension of the cut or the V-shaped side of the test piece with respect to the predominant foam-rise
direction shall be stated in the test report.
5.2 Trouser test piece for method A
The trouser test piece shall be a rectangular parallelepiped cut from a sheet of material with a band knife or a
cutting die. Each test piece shall have the dimensions given in Figure 1 and a 45 mm to 55 mm cut shall be
made at one end. The required tear length (25 mm) shall be marked on the test piece. The predominant foam-
rise direction for the trouser test piece is indicated by an arrow in Figure 1.
Dimensions in millimetres
Key
1 location of thickness measurement
2 mark indicating required tear length
3 cut made in test piece
a
Predominant foam-rise direction.
Figure 1 — Trouser test piece
2 © ISO 2008 – All rights reserved
ISO 8067:2008(E)
5.3 Angle test piece for method B
The test piece shall be cut from a sheet of material of thickness 10 mm to 15 mm with a die having the
dimensions and shape shown in Figure 2. The predominant foam-rise direction for the angle test piece is
indicated in Figure 3.
Dimensions in millimetres
Key
1 location of thickness measurement of test piece cut out using die
Figure 2 — Angle test piece die
Key
1 sheet of material
2 V-shaped side of test piece
a
Predominant foam-rise direction.
Figure 3 — Predominant foam-rise direction for angle test piece
ISO 8067:2008(E)
6 Number of test pieces
Three test pieces shall be tested.
Additional test pieces may be required if the spread of results is too great (see Clause 9) or to compensate for
deviation in the progress of the tear (see 8.2).
7 Conditioning
Materials shall not be tested less than 72 h after manufacture, unless it can be de
...
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