SIST EN ISO 9237:1999

SLOVENSKI STANDARD
01-marec-1999
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Textiles - Determination of permeability of fabrics to air (ISO 9237:1995)
Textilien - Bestimmung der Luftdurchlässigkeit von textilen Flächengebilden (ISO
9237:1995)
Textiles - Détermination de la perméabilité a l'air des étoffes (ISO 9237:1995)
Ta slovenski standard je istoveten z: EN ISO 9237:1995
ICS:
59.080.30 Tkanine Textile fabrics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Is0
INTERNATIONAL
STANDARD
First edition
1995-06-I 5
- Determination of the
Textiles
permeability of fabrics to air
- DBtermina tion de la perm6abilit6 2 /‘air des 6 toffes
Textiles
Reference number
IS0 9237:1995(E)
IS0 9237:1995(E)
Foreword
IS0 (the lnternational 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 9237 was prepared by Technical Committee
I SO/TC 38, Textiles.
Annexes A and B of this International Standard are for information only.
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 photocopying 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
~~
INTERNATIONAL STANDARD 0 IS0 IS0 9237:1995(E)
- Determination of the permeability of
Textiles
fabrics to air
4 Principle
1 Scope
The rate of flow of air passing perpendicularly through
This International Standard describes a method for
a given area of fabric is measured at a given pressure
measuring the permeability of fabrics to air and is ap-
difference across the fabric test area over a given
plicable to most types of fabrics, including industrial
time period.
fabrics for technical purposes, nonwovens and
made-up textile articles that are permeable to air.
5 Sampling
2 Normative references
Select samples either in accordance with the pro-
cedure laid down in the material specification for the
The following standards contain provisions which,
fabric, or as agreed between the interested parties.
through reference in this text, constitute provisions
of this International Standard. At the time of publi-
In the absence of specification, follow the example
cation, the editions indicated were valid. All standards
of sampling given in annex B.
and parties to agreements
are subject to revision,
based on this International Standard are encouraged
6 Atmospheres for conditioning and
to investigate the possibility of applying the most re-
testing
cent editions of the standards indicated below.
Members of IEC and IS0 maintain registers of cur-
The atmospheres for preconditioning, conditioning
rently valid International Standards.
and testing shall be as specified in IS0 139.
IS0 48: 1994, Rubber, vulcanized or thermoplastic -
Determination of hardness (hardness between IO
7 Apparatus
IRHD and 100 IRHD).
Metrological confirmation of the test apparatus shall
- Standard atmospheres for
I SO 139: 1973, Textiles
be carried out in accordance with IS0 10012-I.
conditioning and testing.
7.1 Circular specimen holder, with an orifice al-
IS0 10012-I : 1992, Quality assurance requirements
lowina the test to be carried out on an area of
for measuring equipment - Part 7: Metrological
5 cm*: 20 cm*, 50 cm* or 100 cm*.
confirmation system for measuring equipment.
The tolerance on the test area shall not exceed
+ 0,5 %.
-
3 Definition
NOTE 1 Adequate support of the test specimen, particu-
For the purposes of this International Standard, the larly for large test surfaces, is recommended.
following definition applies
7.2 Means for clamping, to secure the specimen
3.1 air permeability: Velocity of an air flow passing
without distortion.
perpendicularly through a test specimen under speci-
NOTE 2
fied conditions of test area, pressure drop and time. Care should be taken to prevent leakage of air
0 isa
IS0 9237:1995(E)
around the edges of th e test specime n. Alternatively the
Mount the test specimen in the circular specimen
may be m easur .ed separately a nd subtracted f rom
leakage
holder (7.1) with sufficient tension to eliminate wrin-
the test results.
kles, if any, taking care that the fabric is not distorted
in its own plane. Avoid seivedges and areas with
7.3 Guard ring device, to prevent leakage, for op- creases or folded places. For fabrics for which the air
tionai use in conjunction with the clamping means permeability may be different between the two faces
(72, (see A.2.1). of the fabric, specify in the test report [see 11 a) 2)]
which face was tested. Clamp specimens coated on
one side with the coating towards the lower pressure
manometer, connected to
7.4 Pressure gauge or
side to prevent air leakage.
a pressure drop across the
the test head to indicate
specimen test area of 50 Pa, 100 Pa, 200 Pa or
Start the suction fan or other means(7.5) to force the
500 Pa, with an accuracy of at least 2 %.
air through the test specimen and adjust the flow of
air gradually till a pressure drop, as recommended
7.5 Means for drawing a steady flow of air at
above, is achieved across the test area of the fabric.
controlled temperature and humidity
...