SIST EN ISO 75-3:2004

SLOVENSKI STANDARD
SIST EN ISO 75-3:2004
01-oktober-2004
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SIST EN ISO 75-3:2000
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Plastics - Determination of temperature of deflection under load - Part 3: High-strength
thermosetting laminates (ISO 75-3:2004)
Kunststoffe - Bestimmung der Wärmeformbeständigkeitstemperatur - Teil 3:
Hochbeständige härtbare Schichtstoffe und langfaserverstärkte Kunststoffe (ISO 75-
3:2004)
Plastiques - Détermination de la température de fléchissement sous charge - Partie 3:
Stratifiés thermodurcissables a haute résistance (ISO 75-3:2004)
Ta slovenski standard je istoveten z: EN ISO 75-3:2004
ICS:
83.080.10 Duromeri Thermosetting materials
83.120 2MDþDQLSROLPHUL Reinforced plastics
SIST EN ISO 75-3:2004 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 75-3:2004

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SIST EN ISO 75-3:2004

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SIST EN ISO 75-3:2004

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SIST EN ISO 75-3:2004


INTERNATIONAL ISO
STANDARD 75-3
Second edition
2004-05-15


Plastics — Determination of temperature of
deflection under load —
Part 3:
High-strength thermosetting laminates and
long-fibre-reinforced plastics
Plastiques — Détermination de la température de fléchissement sous
charge —
Partie 3: Stratifiés thermodurcissables à haute résistance et plastiques
renforcés de fibres longues




Reference number
ISO 75-3:2004(E)
©
 ISO 2004

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SIST EN ISO 75-3:2004
ISO 75-3:2004(E)
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©  ISO 2004
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ii © ISO 2004 — All rights reserved

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SIST EN ISO 75-3:2004
ISO 75-3:2004(E)
Contents Page
Foreword . iv
Introduction. v
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 1
4 Principle . 1
5 Apparatus. 2
6 Test specimens . 2
7 Conditioning . 3
8 Procedure. 3
9 Expression of results. 4
10 Precision . 4
11 Test report. 4
Bibliography. 5

© ISO 2004 — All rights reserved iii

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SIST EN ISO 75-3:2004
ISO 75-3:2004(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 75-3 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties.
This second edition cancels and replaces the first edition (ISO 75-3:1993), which has been technically revised.
ISO 75 consists of the following parts, under the general title Plastics — Determination of temperature of deflection
under load:
 Part 1: General test method
 Part 2: Plastics and ebonite
 Part 3: High-strength thermosetting laminates and long-fibre-reinforced plastics
iv © ISO 2004 — All rights reserved

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SIST EN ISO 75-3:2004
ISO 75-3:2004(E)
Introduction
In this edition of ISO 75-3, the test load is determined as a fraction of the flexural modulus of the material under
test. This has the advantage that the test load is a fraction of the flexural strength of the material. The test
determines the temperature-dependent decrease in the flexural modulus. Because tensile modulus and tensile
strength are not necessarily related, using the flexural modulus to determine the test load leads to more readily
comparable descriptions of material behaviour.
The strain increase at which the temperature of deflection under load is read has been increased fro
...