EN ISO 75-2:1996

SLOVENSKI STANDARD
SIST EN ISO 75-2:2000
01-maj-2000
3ROLPHUQLPDWHULDOL'RORþDQMHWHPSHUDWXUHXSRJLEDSRGREUHPHQLWYLMRGHO
3ROLPHUQLPDWHULDOLLQHERQLW,62
Plastics - Determination of temperature of deflection under load - Part 2: Plastics and
ebonite (ISO 75-2:1993)
Kunststoffe - Bestimmung der Wärmeformbeständigkeitstemperatur - Teil 2: Kunststoffe
und Hartgummi (ISO 75-2:1993)
Plastiques - Détermination de la température de fléchissement sous charge - Partie 2:
Plastiques et ébonite (ISO 75-2:1993)
Ta slovenski standard je istoveten z: EN ISO 75-2:1996
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 75-2:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN ISO 75-2:2000

---------------------- Page: 2 ----------------------

SIST EN ISO 75-2:2000

---------------------- Page: 3 ----------------------

SIST EN ISO 75-2:2000

---------------------- Page: 4 ----------------------

SIST EN ISO 75-2:2000
IS0
INTERNATIONAL
75-2
STANDARD
First edition
1993-09-15
- Determination of temperature
Plastics
of deflection under load -
Part 2:
Plastics and ebonite
P/as tiques - Dgtermination de la temperature de fkhissement sous
charge -
Partie 2: Plastiques et 6bonite
Reference number
IS0 75-2:1993(E)

---------------------- Page: 5 ----------------------

SIST EN ISO 75-2:2000
IS0 75=2:1993(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(I EC) on all matters of electrotechnical standardization.
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.
International Standard IS0 75-2 was prepared by Technical Committee
lSO/TC 61, Plastics, Sub-Committee SC 2, Mechanical properties.
Together with the other parts, it cancels and replaces the second edition
of IS0 75 (IS0 75:1987), which has been technically revised.
IS0 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
0 IS0 1993
All rights reserved. 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 per-
mission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland

---------------------- Page: 6 ----------------------

SIST EN ISO 75-2:2000
IS0 75=2:1993(E)
INTERNATIONAL STANDARD
Plastics - Determination of temperature of deflection
under load -
Part 2:
Plastics and ebonite
to revision, and parties to agreements based on this
1 Scope
part of IS0 75 are encouraged to investigate the pos-
sibility of applying the most recent editions of the
1.1 This part of IS0 75 specifies three methods for
standards indicated below. Members of IEC and IS0
the determination of the temperature of deflection
maintain registers of currently valid International
under load (bending stress) of plastics and ebonite:
Standards.
- method A, using a nominal surface stress of
IS0 75-l : 1993, Plastics - Determination of tempera-
I,80 MPa;
ture of deflection under load - Part 1: General test
method.
- method B, using a nominal surface stress of
0,45 MPa;
is0 293: 1986, Plastics - Compression moulding test
specimens of thermoplastic materials.
- method C, using a nominal surface stress of
8,00 MPa.
IS0 294: -l 1, Plastics - Injection moulding of test
specimens of thermoplastic materials.
1.2 The test specimens are tested in one of two
positions, flatwise or edgewise, the requirements on IS0 2818: -*I, Plastics - Preparation of test speci-
test-specimen dimensions being different in each mens by machining.
case (see clause 6).
IS0 3167:1993, Plastics - Multipurpose test speci-
mens.
1.3 See IS0 75-l :1993, subclause 1.3.
NOTE 1 The methods give better reproducibility with
amorphous plastics than with semi-crystalline ones. With
3 Definitions
some materials, it may be necessary to anneal the test
specimens to obtain reliable results. Annealing procedures,
See IS0 75-l :I 993, clause 3.
if applied, generally result in an increase in the temperature
of deflection under load (see 6.2 and 6.3).
4 Principle
2 Normative references
A standard test specimen made of plastic or ebonite
The following standards contain provisions which, is subjected to a bending stress to produce one of the
through reference in this text, constitute provisions nominal surface stresses given in 1 .I. The tempera-
of this part of IS0 75. At the time of publication, the ture is raised at a uniform rate, and the temperature
editions indicated were valid. All standards are subject at which a specified deflection occurs is measured.
1) To be published. (Revision of IS0 294:1975)
2) To be published. (Revision of IS0 2818:1980)

---------------------- Page: 7 ----------------------

SIST EN ISO 75-2:2000
IS0 75-2: 1993(E)
NOTES
5 Apparatus
2 The test results obtained on specimens approaching
13 mm thick may be 2 “C to 4 “C above those obtained
5.1 Means of applying a bending stress
from thin tes
...