EN ISO 4892-1:2000
(Main)Plastics - Methods of exposure to laboratory light sources - Part 1: General guidance (ISO 4892-1:1999)
Plastics - Methods of exposure to laboratory light sources - Part 1: General guidance (ISO 4892-1:1999)
Kunststoffe - Künstliches Bestrahlen oder Bewittern in Geräten - Teil 1: Allgemeine Anleitung (ISO 4892-1:1999)
Dieser Teil von ISO 4892 stellt Informationen und allgemeine Richtlinien für die Auswahl und Durchführung der in den folgenden Teilen detailliert beschriebenen Expositionsverfahren bereit. Außerdem beschreibt und empfiehlt er Verfahren für die Bestimmung der Bestrahlungsstärke und der Strahlungsbeanspruchung. Schließlich werden Anforderungen an die Geräte zur Überwachung der Lufttemperatur in der Prüfkammer und der Oberflächentemperatur dunkler und heller Materialien angegeben.
Plastiques - Méthodes d'exposition à des sources lumineuses de laboratoire - Partie 1: Guide général (ISO 4892-1:1999)
La présente partie de l'ISO 4892 fournit des informations et un guide général pour la sélection et l'application des méthodes d'exposition décrites en détail dans les autres parties de la norme. Elle décrit également et recommande des méthodes pour la détermination de l'éclairement énergétique et de l'exposition énergétique. Les prescriptions relatives aux dispositifs utilisés pour contrôler la température de l'air à l'intérieur de l'enceinte et la température de surface des matériaux sombres et clairs sont également décrites. Elle fournit également des informations sur l'interprétation des données issues des essais d'exposition accélérée. Des informations plus spécifiques sur les méthodes de détermination des changements de propriétés des plastiques après exposition et de notification des résultats sont décrites dans l'ISO 4582.
Polimerni materiali - Metode izpostave laboratorijskim virom svetlobe - 1. del: Splošna navodila (ISO 4892-1:1999)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2001
Polimerni materiali - Metode izpostave laboratorijskim virom svetlobe - 1. del:
Splošna navodila (ISO 4892-1:1999)
Plastics - Methods of exposure to laboratory light sources - Part 1: General guidance
(ISO 4892-1:1999)
Kunststoffe - Künstliches Bestrahlen oder Bewittern in Geräten - Teil 1: Allgemeine
Anleitung (ISO 4892-1:1999)
Plastiques - Méthodes d'exposition a des sources lumineuses de laboratoire - Partie 1:
Guide général (ISO 4892-1:1999)
Ta slovenski standard je istoveten z: EN ISO 4892-1:2000
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 4892-1
Second edition
1999-07-01
Plastics — Methods of exposure to
laboratory light sources —
Part 1:
General guidance
Plastiques — Méthodes d'exposition à des sources lumineuses
de laboratoire —
Partie 1: Guide général
A Reference number
ISO 4892-1:1999(E)
ISO 4892-1:1999(E)
Contents
Page
1 Scope .1
2 Normative references .1
3 Terms and definitions .2
4 Principle.2
4.1 Significance.2
4.2 Use of accelerated tests with laboratory light sources .3
5 Requirements for laboratory exposure devices .4
5.1 Light source .4
5.2 Temperature .5
5.3 Humidity and wetting .6
5.4 Other apparatus requirements .7
6 Test specimens.8
6.1 Form, shape and preparation .8
6.2 Number of test specimens.8
6.3 Storage and conditioning .9
7 Test conditions and procedure .9
8 Precision and bias .9
8.1 Precision.9
8.2 Bias .10
9 Test report .10
Annex A (informative) Factors that decrease the degree of correlation between accelerated tests
using laboratory light sources and actual-use exposures.12
Annex B (normative) Procedures for measuring the irradiance uniformity in the specimen exposure area .14
© ISO 1999
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 the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet iso@iso.ch
Printed in Switzerland
ii
© ISO
ISO 4892-1:1999(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 3.
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 ISO 4892-1 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 6,
Ageing, chemical and environmental resistance.
This second edition cancels and replaces the first edition (ISO 4892-1:1994), of which it constitutes a technical
revision.
ISO 4892 consists of the following parts, under the general title Plastics — Methods of explosure to laboratory light
sources:
Part 1: General guidance
Part 2: Xenon-arc sources
Part 3: Fluorescent UV lamps
Part 4: Open-flame carbon-arc lamps
Annex B forms a normative part of this part of ISO 4892. Annex A is for information only.
iii
© ISO
ISO 4892-1:1999(E)
Introduction
Plastics are often used outdoors or in indoor locations where they are exposed to daylight or to daylight behind
glass for long periods. It is therefore very important to determine the effects of daylight, heat, moisture and other
climatic stresses on the colour and other properties of plastics. Outdoor exposures to daylight and to daylight
filtered by window glass are described in ISO 877:1994, Plastics — Methods of exposure to direct weathering, to
. However, it
weathering using glass-filtered daylight, and to intensified weathering by daylight using Fresnel mirrors
is often necessary to determine more rapidly the effects of light, heat and moisture on the physical, chemical and
optical properties of plastics with accelerated laboratory exposure tests that use specific laboratory light sources.
Exposures in these laboratory devices are conducted under more controlled conditions than found in natural
environments and are designed to accelerate polymer degradation and product failures.
Relating results from accelerated laboratory exposures to those obtained in actual-use conditions is difficult
because of variability in both types of exposure and because laboratory tests often do not reproduce all the
exposure stresses experienced by plastics exposed in actual-use conditions. No single laboratory exposure test can
be specified as a total simulation of actual-use exposures.
The relative durability of materials in actual-use exposures can be very different depending on the location of the
exposure because of differences in UV radiation, time of wetness, temperature, pollutants and other factors.
Therefore, even if results from a specific accelerated laboratory test are found to be useful for comparing the
relative durability of materials exposed in a particular outdoor location or in particular actual-use conditions, it cannot
be assumed that they will be useful for determining the relative durability of materials exposed in a different outdoor
location or in different actual-use conditions.
iv
INTERNATIONAL STANDARD © ISO ISO 4892-1:1999(E)
Plastics — Methods of exposure to laboratory light sources —
Part 1:
General guidance
1 Scope
1.1 This part of ISO 4892 provides information and general guidance relevant to the selection and operation of the
methods of exposure described in detail in subsequent parts. It also describes and recommends procedures for
determining irradiance and radiant exposure. Requirements for devices used to monitor chamber air temperature
and surface temperature of dark and light materials are also described.
1.2 This part of ISO 4892 also provides information on the interpretation of data from accelerated exposure tests.
More specific information about methods for determining the change in plastic properties after exposure and
reporting these results is described in ISO 4582.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 4892. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 4892 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 291:1997, Plastics — Standard atmospheres for conditioning and testing.
ISO 293:1986, Plastics — Compression moulding test specimens of thermoplastic materials.
ISO 294-1:1996, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 1: General
principles, and moulding of multipurpose and bar test specimens.
ISO 294-2:1996, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 2: Small tensile
bars.
ISO 294-3:1996, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 3: Small plates.
ISO 295:1991, Plastics — Compression moulding of test specimens of thermosetting materials.
ISO 2557-1:1989, Plastics — Amorphous plastics — Preparation of test specimens with a specified maximum
reversion — Part 1: Bars.
ISO 2818:1994, Plastics — Preparation of test specimens by machining.
ISO 3167:1993, Plastics — Multipurpose test specimens.
ISO 4582:1998, Plastics — Determination of changes in colour and variations in properties after exposure to
daylight under glass, natural weathering or laboratory light sources.
ISO 4892-2:1994, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc sources.
ISO 4892-3:1994, Plastics — Methods of exposure to laboratory light sources — Part 3: Fluorescent UV lamps.
© ISO
ISO 4892-1:1999(E)
ISO 4892-4:1994,
Plastics — Methods of exposure to laboratory light sources — Part 4: Open-flame carbon-arc
lamps.
ISO 9370:1997, Plastics — Instrumental determination of radiant exposure in weathering tests — General guidance
and basic test method.
CIE Publication No. 85:1989, Solar spectral irradiance.
3 Terms and definitions
For the purposes of this part of ISO 4892, the following terms and definitions apply.
3.1
control
Æweatheringæ a material which is of similar composition and construction to the test material and which is exposed at
the same time for comparison with the test material
NOTE An example of the use of a control material would be when a formulation different from one currently being used is
being evaluated. In that case, the control would be the plastic made with the original formulation.
3.2
file specimen
a portion of the material to be tested which is stored under conditions in which it is stable and is used for
comparison between exposed and original state
3.3
reference material
a material of known performance
3.4
reference specimen
a portion of the reference material that is to be exposed
4 Principle
Specimens of the samples to be tested are exposed to laboratory light sources under controlled environmental
conditions. The methods described include means which may be used to measure irradiance at the face of the
specimen and radiant exposure, and procedures for measuring the temperature of specified white and black panels.
4.1 Significance
4.1.1 When conducting exposures in devices which use laboratory light sources, it is important to consider how
well the accelerated-test conditions simulate the actual-use environment for the plastic being tested. In addition, it is
essential to consider the effects of variability in both the accelerated test and actual exposures when setting up
exposure experiments, and when interpreting the results from accelerated exposure tests.
4.1.2 No laboratory exposure test can be specified as a total simulation of actual-use conditions. Results obtained
from these laboratory accelerated exposures can be considered as representative of actual-use exposures only
when the degree of rank correlation has been established for the specific materials being tested and when the type
and mechanism of degradation are the same. The relative durability of materials in actual-use conditions can be
very different in different
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