ISO 1926:2009
(Main)Rigid cellular plastics — Determination of tensile properties
Rigid cellular plastics — Determination of tensile properties
ISO 1926:2009 specifies a method of determining the behaviour of rigid cellular plastics materials when they are subjected to a tensile stress. It applies primarily to cellular materials having a compression resistance sufficient to permit suitable gripping of the test specimens. If it is impossible to grip the test specimen, the method is modified so that the ends of the specimen are reinforced with metal plates.
Plastiques alvéolaires rigides — Détermination des caractéristiques en traction
Penjeni polimerni materiali - Ugotavljanje nateznih lastnosti
Ta mednarodni standard določa metodo za ugotavljanje vedenja penjenih polimernih materialov, ko so ti izpostavljeni natezni obremenitvi.
Uporablja se zlasti za penjene materiale z dovolj veliko odpornostjo proti stiskanju, da se omogoči ustrezen prijem preskušancev. Če prijem preskušanca ni mogoč, se metoda spremeni tako, da so konci vzorca ojačani s kovinskimi ploščicami (glej točko 8).
Razmerje med velikostjo celice in velikostjo preskušanca mora biti tako, da je preskus realen.
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 1926
Fourth edition
2009-12-01
Rigid cellular plastics — Determination of
tensile properties
Plastiques alvéolaires rigides — Détermination des caractéristiques en
traction
Reference number
ISO 1926:2009(E)
©
ISO 2009
---------------------- Page: 1 ----------------------
ISO 1926:2009(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.
COPYRIGHT PROTECTED DOCUMENT
© ISO 2009
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 2009 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 1926:2009(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 1926 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 10, Cellular plastics.
This fourth edition cancels and replaces the third edition (ISO 1926:2005), of which it constitutes a minor
revision. Changes have been made to the requirements for the conditioning of test specimens in 5.2.
© ISO 2009 – All rights reserved iii
---------------------- Page: 3 ----------------------
INTERNATIONAL STANDARD ISO 1926:2009(E)
Rigid cellular plastics — Determination of tensile properties
1 Scope
This International Standard specifies a method of determining the behaviour of rigid cellular plastics materials
when they are subjected to a tensile stress.
It applies primarily to cellular materials having a compression resistance sufficient to permit suitable gripping
of the test specimens. If it is impossible to grip the test specimen, the method is modified so that the ends of
the specimen are reinforced with metal plates (see Clause 8).
The relationship between cell size and test specimen size must be such that the test is realistic.
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 291, Plastics — Standard atmospheres for conditioning and testing
ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic method
for the determination of repeatability and reproducibility of a standard measurement method
3 Principle
A test specimen of a given shape is subjected to a tensile stress transmitted to the test specimen by means of
a suitable device and corresponding stress-strain curve is plotted.
4 Apparatus
The test machine shall be such that:
a) It has clamps suitable for holding the test specimen. These clamps shall meet the following requirements:
1) they shall close sufficiently tightly on the faces of the test specimen to avoid slipping;
2) they shall not exert, on any part of the ends of the test specimen, localized pressure which could
cause tears, deformations or ruptures.
In cases of difficulty, use the variant described in Clause 8.
b) The movable clamp can be moved, with the test specimen in place, away from the fixed clamp at a
constant speed of (5 ± 1) mm/min in a direction parallel to the longitudinal axis of the test specimen.
c) The force thus exerted on the test specimen can be determined with a maximum error of 1 %, and can be
recorded.
© ISO 2009 – All rights reserved 1
---------------------- Page: 4 ----------------------
ISO 1926:2009(E)
d) If an extensometer is used, it shall exert a minimum force on the test specimen and shall permit the
increase in gauge length of the test specimen to be read to an accuracy of 0,1 mm. The distance
between the two parallel surfaces defining the extensometer gauge length shall not vary by more than
1 % (tolerance on parallelism).
5 Test specimens
5.1 Dimensions
The test specimens shall have the shape and dimensions shown in Figure 1.
Dimensions in millimetres
a
Distance between jaws.
b
Gauge length.
Figure 1 — Test specimen
5.2 Preparation and conditioning
Remove any moulding skin from the test specimens, trimming their surfaces with a mechanical saw and, if
necessary, machining them, but without modifying the structure.
When necessary, mark the test specimens so as to indicate their orientation in relation to the direction of
anisotropy.
The conditioning of the test specimens shall be carried out in accordance with the requirements of ISO 291.
For precise measurement, test specimens shall be conditioned for a minimum of 6 h at
(23 ± 2) °C and (50 ± 10) % relative humidity
or
+20
(23 ± 5) °C and (50 ) % relative humidity
−10
...
SLOVENSKI STANDARD
SIST ISO 1926:2015
01-marec-2015
1DGRPHãþD
SIST ISO 1926:1996
Penjeni polimerni materiali - Ugotavljanje nateznih lastnosti
Rigid cellular plastics - Determination of tensile properties
Plastiques alvéolaires rigides - Détermination des caractéristiques en traction
Ta slovenski standard je istoveten z: ISO 1926:2009
ICS:
83.100 Penjeni polimeri Cellular materials
SIST ISO 1926:2015 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST ISO 1926:2015
---------------------- Page: 2 ----------------------
SIST ISO 1926:2015
INTERNATIONAL ISO
STANDARD 1926
Fourth edition
2009-12-01
Rigid cellular plastics — Determination of
tensile properties
Plastiques alvéolaires rigides — Détermination des caractéristiques en
traction
Reference number
ISO 1926:2009(E)
©
ISO 2009
---------------------- Page: 3 ----------------------
SIST ISO 1926:2015
ISO 1926:2009(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.
COPYRIGHT PROTECTED DOCUMENT
© ISO 2009
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 2009 – All rights reserved
---------------------- Page: 4 ----------------------
SIST ISO 1926:2015
ISO 1926:2009(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 1926 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 10, Cellular plastics.
This fourth edition cancels and replaces the third edition (ISO 1926:2005), of which it constitutes a minor
revision. Changes have been made to the requirements for the conditioning of test specimens in 5.2.
© ISO 2009 – All rights reserved iii
---------------------- Page: 5 ----------------------
SIST ISO 1926:2015
---------------------- Page: 6 ----------------------
SIST ISO 1926:2015
INTERNATIONAL STANDARD ISO 1926:2009(E)
Rigid cellular plastics — Determination of tensile properties
1 Scope
This International Standard specifies a method of determining the behaviour of rigid cellular plastics materials
when they are subjected to a tensile stress.
It applies primarily to cellular materials having a compression resistance sufficient to permit suitable gripping
of the test specimens. If it is impossible to grip the test specimen, the method is modified so that the ends of
the specimen are reinforced with metal plates (see Clause 8).
The relationship between cell size and test specimen size must be such that the test is realistic.
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 291, Plastics — Standard atmospheres for conditioning and testing
ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results — Part 2: Basic method
for the determination of repeatability and reproducibility of a standard measurement method
3 Principle
A test specimen of a given shape is subjected to a tensile stress transmitted to the test specimen by means of
a suitable device and corresponding stress-strain curve is plotted.
4 Apparatus
The test machine shall be such that:
a) It has clamps suitable for holding the test specimen. These clamps shall meet the following requirements:
1) they shall close sufficiently tightly on the faces of the test specimen to avoid slipping;
2) they shall not exert, on any part of the ends of the test specimen, localized pressure which could
cause tears, deformations or ruptures.
In cases of difficulty, use the variant described in Clause 8.
b) The movable clamp can be moved, with the test specimen in place, away from the fixed clamp at a
constant speed of (5 ± 1) mm/min in a direction parallel to the longitudinal axis of the test specimen.
c) The force thus exerted on the test specimen can be determined with a maximum error of 1 %, and can be
recorded.
© ISO 2009 – All rights reserved 1
---------------------- Page: 7 ----------------------
SIST ISO 1926:2015
ISO 1926:2009(E)
d) If an extensometer is used, it shall exert a minimum force on the test specimen and shall permit the
increase in gauge length of the test specimen to be read to an accuracy of 0,1 mm. The distance
between the two parallel surfaces defining the extensometer gauge length shall not vary by more than
1 % (tolerance on parallelism).
5 Test specimens
5.1 Dimensions
The test specimens shall have the shape and dimensions shown in Figure 1.
Dimensions in millimetres
a
Distance between jaws.
b
Gauge length.
Figure 1 — Test specimen
5.2 Preparation and conditioning
Remove any moulding skin from the test specimens, trimming their surfaces with a mechanical saw and, if
necessary, machining them, but without modify
...
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