EN ISO 11758:1997
(Main)Rubber and plastics hoses - Exposure to a xenon arc lamp - Determination of changes in colour and appearance (ISO 11758:1995)
Rubber and plastics hoses - Exposure to a xenon arc lamp - Determination of changes in colour and appearance (ISO 11758:1995)
Specifies a method for exposing rubber and plastics hoses for the evaluation of the changes in colour and appearance. The exposition is carried out with a xenon arc lamp that yields a spectrum closely similar to that of daylight.
Gummi- und Kunststoffschläuche - Bestrahlung mit Xenonbogenlampe - Bestimmung der Änderungen von Farbe und Aussehen (ISO 11758:1995)
Diese Internationale Norm legt ein Verfahren fest, bei dem Gummi- und Kunst- stoffschläuche in einer Laboratoriumsprüfung einer Lichtquelle ausgesetzt werden, um die durch Licht bedingten Änderungen von Farbe und Aussehen zu beurteilen.
Tuyaux en caoutchouc et en plastique - Exposition à la lampe à arc au xénon - Détermination du changement de coloration et d'aspect (ISO 11758:1995)
Gumene ali polimerne cevi - Izpostavljanje ksenonovi ločni svetilki - Ugotavljanje sprememb barve in videza (ISO 11758:1995)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2000
*XPHQHDOLSROLPHUQHFHYL,]SRVWDYOMDQMHNVHQRQRYLORþQLVYHWLONL8JRWDYOMDQMH
VSUHPHPEEDUYHLQYLGH]D ,62
Rubber and plastics hoses - Exposure to a xenon arc lamp - Determination of changes in
colour and appearance (ISO 11758:1995)
Gummi- und Kunststoffschläuche - Bestrahlung mit Xenonbogenlampe - Bestimmung der
Änderungen von Farbe und Aussehen (ISO 11758:1995)
Tuyaux en caoutchouc et en plastique - Exposition a la lampe a arc au xénon -
Détermination du changement de coloration et d'aspect (ISO 11758:1995)
Ta slovenski standard je istoveten z: EN ISO 11758:1997
ICS:
23.040.70 Gumene cevi in armature Hoses and hose assemblies
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL
IS0
STANDARD
First edition
1995-08-15
Rubber and plastics hoses - Exposure
to a xenon arc lamp - Determination
of changes in colour and appearance
Tuyaux en caoutchouc et en plastique - Exposition a la lampe 9 arc
au x6non - Dktermination du changement de coloration et d ’aspect
Reference number
IS0 11758:1995(E)
IS0 11758:1995(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
(IEC) 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 11758 was prepared by Technical Committee
lSO/TC 45, Rubber and rubber products, Subcommittee SC 1, Hoses
(rubber and plastics).
Annexes A, B and C form an integral part of this International Standard.
0 IS0 1995
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 photocopyrng and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii
0 IS0
IS0 11758:1995(E)
Introduction
Measuring the effect of a light source on hoses is of value as a means of
inspecting the conservation of the colour, which is often indicative, and the
integrity of the coating material that protects the components making up
the hose.
Accordingly, this International Standard pursues a threefold aim:
a) to carry out accelerated artificial ageing using existing material, with a
.
.
source approximating as closely as possible to natural light
I
b) to measure the effects of this light source on hoses;
rioration, by agreement be
c) to set a limit on dete n the manufac-
tu rer and the use r.
A related International Standard is IS0 8580:1987, Rubber and plastics
hoses - Determination of ultra-violet resistance under static conditions,
which refers only to fluorescent lights.
The only other International Standard in this field, IS0 4665-3:1987, Rub-
ber, vulcanized - Resistance to weathering - Part 3: Methods of expo-
sure to artificial /ight, is not specific to hoses.
. . .
Ill
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IS0 11758:1995(E)
INTERNATIONAL STANDARD 0 IS0
Rubber and plastics hoses - Exposure to a xenon arc
- Determination of changes in colour and
lamp
appearance
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.
IS0 105-BOI :I 994, Textiles - Tests for colour fast-
1 Scope
ness - Part 501: Co/our fastness to light: Daylight.
This International Standard specifies a method for ex-
IS0 4665-l : 1985, Rubber, vulcanized - Resistance
posing rubber and plastics hoses to a laboratory light
to weathering - Part I: Assessment of changes in
source for the purpose of evaluating the changes in
properties after exposure to natural weathering or ar-
colour and appearance produced by such exposure.
tificial light.
NOTE 1 A xenon arc was chosen from among a variety
of sources since, when correctly filtered and maintained, it IS0 4665-3: 1987, Rubber, vulcanized - Resistance
yields a spectrum closely similar to that of daylight.
to weathering - Part 3: Methods of exposure to ar-
tificial light.
2 Normative references
Cl E Publication No. 85: 1989,l) Solar spectra/ irradi-
ante.
The following standards contain provisions which,
through reference in this text, constitute provisions
of this International Standard. At the time of publica-
tion, the editions indicated were valid. All standards
3 Principle
are subject to revision, and parties to agreements
based on this International Standard are encouraged
Sections of rubber or plastic hose are exposed, with-
to investigate the possibility of applying the most re-
out stress and in a defined environment, to radiation
cent editions of the standards indicated below.
from a xenon lamp for a predetermined period and
Members of IEC and IS0 maintain registers of cur-
inspected in order to assess visually any change in
rently valid International Standards.
colour and appearance.
IS0 105-A02: 1993, Textiles - Tests for co/our fast-
NOTE 2 Other exposure conditions may be used and
Part A02 Grey scale for assessing change in
ness - other parameters assessed, provided they are defined by
agreement between the producer and the user.
colour.
1) Published by the International Commission on Illumination, Central Bureau, P.O. Box 169, A-1033 Vienna, Austria.
0 IS0
IS0 11758:1995(E)
4 Apparatus
Table 2 - Relative spectral irradiance for
4.1 Laboratory light source
daylight behind window glass (method B)
Relative spectral
4.1.1 Quartz-jacketed xenon arc lamps emit radiation
Wavelength, ;1
irradiance
in a range which extends from below 270 nm in the
nm %
ultraviolet through the visible spectrum and into the
infrared.
300 < A< 800 100')
For simulation of direct natural exposure, the radiant
A<300 0
energy shall be filtered to provide a spectral power
300<& 320 < 0,l
distribution that closely approximates to that of ter-
restrial daylight (method A) as described in CIE Publi- 320-c 1~ 360 3,0 + 0,5
-
cation No. 85: 1989.
360 < L< 400 6,0 + I,0
-
Filters to reduce the irradiance at wavelengths below
1) The spectral irradiance over the range 300 nm to
320 nm shall be used when simulating daylight fil-
800 nm is defined as 100 %.
tered through window glass (method B).
Filters to reduce non-actinic infrared energy may be
4.1.3 For reference purposes, an irradiance in the
desirable when heating of the specimen adversely in-
passband 280 nm to 800 nm of 550 W/m* has been
fluences the photochemical reaction rate or causes selected (see CIE Publication No. 85:1989). It is not
thermal degradation not experienced during real-time necessarily the preferred irradiance. When mutually
direct natural exposure.
agreed upon, another irradiance may be selected.
Report the irradiance and the passband selected.
The characteristics of xenon arcs and filters are sub-
ject to change in use due to ageing, and they shall be
4.1.4 The irradiance at any point on the surface of
replaced at appropriate intervals. Further, they are
the test piece shall not vary by more than +I0 %
subject to change due to the accumulation of dirt, and
compared to any other point in the test-piece holder
they shall be cleaned at appropriate intervals. Re-
plane along a line parallel to the axis of the light
placement and cleaning shall be carried out in ac-
source.
cordance with the manufacturer ’s or supplier ’s
instructions.
NOTE 3 Depending on the test enclosure (4.2), this re-
quirement on the spectral irradiance may be considered to
apply to time-averaged values.
4.1.2 Recommendations on the wavelength distri-
bution of UV radiation from filtered xenon arc sources,
together with tolerance limits, are given in table 1 for
4.2 Test enclosure
artificial weathering (method A) and table 2 for simu-
lated exposure to daylight behind window glass
The test enclosure shall contain a rack designed to
(method B) .
hold the test pieces while allowing cooling air to cir-
culate over them. If the lamps cause large quantities
of ozone to be formed, the ozone shall be prevented
Table 1 - Relative spectral irradiance for
from coming into contact with the test pieces, e.g.
artificial weathering (method A)
by evacuating the cooling air to the outside of the
building.
Relative spectral
Wavelength, 1
irradiance
WARNING - Ozone is toxic. Operators should be
%
nm
I
protected from exposure to ozone (see annex A).
290 < A< 800 100')
The light source shall be placed so that the energy to
R< 290 0
which the test pieces are exposed does not vary by
290< A< 320 0,6 + 0,2 more than &IO % over the entire surface of the test
-
pieces.
320-c ;1< 360 4,2 + 0,5
-
360-c A,< 400 6,2 + I,0
-
To reduce the effect of eccentricity when more than
one lamp is used in the same enclosure in order to
1) The spectral irradiance over the range 290 nm to
improve the light quality, the evenness of distribution
800 nm is defined as 100 %.
I
shall be improved by causing the rack holding the test
,
0 IS0
IS0 11758:1995(E)
In order to determine the range of surface tempera-
pieces to revolve around the light source and, if
tures of the exposed test pieces and to control better
necessary, by periodically moving each test piece up
the irradiation or artificial-weathering conditions in the
and down.
apparatus, the use of a white-standard thermometer,
The test-piece holders can also be caused to rotate
of a design analogous to that of the black-standard
about their own axes so as to allow both sides of the
thermometer described above, is recommended in
test pieces to be exposed to direct light-source radi-
addition to the black-standard thermometer. Instead
ation. This method helps to keep the test pieces at a
of the black coating, a white coating is used, with a
low temperature. Periods of darkness can also be
good resistance to ageing, whose remission rate be-
obtained by periodically switching the light source on
tween 300 nm and 1 000 nm wavelength is at least
and off. If the exposure cycle includes either of these
90 % and between 1 000 nm and 2 500 nm at least
features, an explicit statement to that effect shall be
60 %.
included in the test report.
For ease of regulation of the temperature, a thermo-
stat can be used, with the sensor placed inside the
4.3 Black-standard thermometer
test enclosure.
The black-standard thermometer is used to determine
Due to the nature of the material and its projected
the temperature of dark test pieces of low thermal
use, the recommended test temperature is
conductivity while they are held in the holders during
55 “C + 5 “C, but other temperatures may be used
exposure.
by agreement between the interested parties.
The thermometer shall consist of a plane stainless-
For special-purpose hoses, higher temperatures can
steel plate with a thickness of about 0,5 mm, a length
be used. In such cases, the effects of thermal degra-
of about 70 mm and a width of about 40 mm. The
dation are more likely to affect the test results.
surface of the plate facing the light source shall be
coated with a thin black layer with good resistance to
4.4 Relative-humidity measuring device
ageing. The black panel shall absorb at least 95 % of
all incident flux to 2 500 nm. The temperature of the
The relative humidity of the air circulating over the
panel shall be measured with a platinum resistance
test pieces can, if necessary, be maintained at a
sensor mounted so that it makes good thermal con-
chosen value measured by wet- and dry-bulb thermo-
tact with the centre of the panel on the side not ex-
meters, or by any other suitable instrument placed
posed to the light source. This side of the panel shall
inside the test enclosure and protected from the lamp
be fixed to a 5-mm-thick baseplate made of unfilled
radiation.
poly(vinylidene fluoride) (PVDF) with a central recess
which forms an air space round the sensor. The dis-
The recommended relative humidity is (65 + 5) %,
tance between the sensor and the floor of the recess
but other values may be used by agreement between
shall be about 1 mm.
the interested parties.
The length and width of the baseplate shall be suffi-
NOTE 5 Given that the temperature of the test pieces
cient to ensure that, when fitting the thermometer to
varies depending on their colour and thickness, the moisture
the test-piece holder, the metal mounts of the test-
content of the air in the vicinity of each test piece cannot
piece holder are at least 4 mm from the edges of the
be regarded as corresponding to the relative humidity of the
metal panel so that there is no thermal contact be-
air as derived from the measurements.
tween the metal panel and the test-piece holder.
NOTE 4 The difference between the black-standard ther-
4.5 Water-spraying
mometer described above and the black-panel thermometer
which was formerly used in most
...
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