SIST EN ISO 15496:2004
(Main)Textiles - Measurement of water vapour permeability of textiles for the purpose of quality control (ISO 15496:2004)
Textiles - Measurement of water vapour permeability of textiles for the purpose of quality control (ISO 15496:2004)
This International Standard describes a comparatively simple method for testing the water vapour permeability of textiles that will provide the manufacturer with a clearly recognized method for quality control within the plant. The simple test method described in this International Standard is not applicable for classifying the water vapour resistance of textiles against values relating to physiological effects specified in product standards, and particularly not those relating to personal protective equipment.
Textilien - Messung der Wasserdampfdurchlässigkeit von Textilien als Qualitätskontrolle (ISO 15496:2004)
Diese Internationale Norm beschreibt ein vergleichsweise einfaches Verfahren zur Prüfung der Wasserdampf-durchlässigkeit von Textilien, um den Herstellern ein eindeutig anerkanntes Verfahren zur Qualitätskontrolle in den Betrieben zur Verfügung zu stellen.
Das in dieser Norm beschriebene einfache Prüfverfahren ist nicht zur Klassifizierung des Wasserdampfdurch-gangswiderstandes von Textilien nach den Werten anwendbar, die in Anforderungsnormen, insbesondere für Arbeitsschutzausrüstungen, hinsichtlich der physiologischen Auswirkungen festgelegt sind
Textiles - Mesurage de la perméabilité a la vapeur d'eau des textiles dans le but du contrôle qualité (ISO 15496:2004)
L'ISO 15496:2004 décrit une méthode simple permettant de soumettre à l'essai la perméabilité à la vapeur d'eau des textiles, afin de fournir au fabricant une méthode clairement reconnue pour le contrôle qualité effectué dans son usine. Cette méthode n'est pas applicable pour classer la résistance à la vapeur d'eau des textiles par rapport à des indices liés aux effets physiologiques spécifiés dans les normes de produit, surtout pour les équipements de protection individuelle.
Tekstilije - Merjenje prepustnosti tekstilij za vodno paro pri kontroli kakovosti (ISO 15496:2004)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 15496:2004
01-julij-2004
Tekstilije - Merjenje prepustnosti tekstilij za vodno paro pri kontroli kakovosti (ISO
15496:2004)
Textiles - Measurement of water vapour permeability of textiles for the purpose of quality
control (ISO 15496:2004)
Textilien - Messung der Wasserdampfdurchlässigkeit von Textilien als Qualitätskontrolle
(ISO 15496:2004)
Textiles - Mesurage de la perméabilité a la vapeur d'eau des textiles dans le but du
contrôle qualité (ISO 15496:2004)
Ta slovenski standard je istoveten z: EN ISO 15496:2004
ICS:
59.080.01 Tekstilije na splošno Textiles in general
SIST EN ISO 15496:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 15496:2004
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SIST EN ISO 15496:2004
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SIST EN ISO 15496:2004
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SIST EN ISO 15496:2004
INTERNATIONAL ISO
STANDARD 15496
First edition
2004-05-01
Textiles — Measurement of water vapour
permeability of textiles for the purpose of
quality control
Textiles — Mesurage de la perméabilité à la vapeur d'eau des textiles
dans le but du contrôle qualité
Reference number
ISO 15496:2004(E)
©
ISO 2004
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SIST EN ISO 15496:2004
ISO 15496:2004(E)
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ii © ISO 2004 – All rights reserved
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SIST EN ISO 15496:2004
ISO 15496:2004(E)
Contents Page
Foreword. iv
1 Scope. 1
2 Terms and definitions. 1
3 Symbols and units . 1
4 Principle. 2
5 Apparatus. 2
6 Preparation. 3
7 Test procedure. 3
8 Calculation and expression of results. 4
9 Precision of results. 4
10 Test report. 5
Annex A (informative) Water vapour permeability — Application of test results. 8
Annex B (informative) Physical principle behind the test method. 9
Annex C (informative) Dry desiccant cup methods . 11
Bibliography . 12
© ISO 2004 – All rights reserved iii
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SIST EN ISO 15496:2004
ISO 15496:2004(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 15496 was prepared by Technical Committee ISO/TC 38, Textiles, Subcommittee SC 2, Cleansing,
finishing and water resistance tests.
iv © ISO 2004 – All rights reserved
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SIST EN ISO 15496:2004
INTERNATIONAL STANDARD ISO 15496:2004(E)
Textiles — Measurement of water vapour permeability of
textiles for the purpose of quality control
1 Scope
This International Standard describes a comparatively simple method for testing the water vapour permeability
of textiles that will provide the manufacturer with a clearly recognized method for quality control within the
plant.
The simple test method described in this International Standard is not applicable for classifying the water
vapour resistance of textiles against values relating to physiological effects specified in product standards, and
particularly not those relating to personal protective equipment.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
water vapour permeability
WVP
characteristic of a textile material describing the amount of water vapour diffusing through the textile per
square metre, per hour and per unit difference of water vapour pressure across the textile
3 Symbols and units
Symbol Description Unit
2
a Area of the measuring cup opening
m
∆t Measuring time h
∆m Change in mass of the measuring cup during the period ∆t g
∆m
Change in mass of the measuring cup on the specimen holder with only g
app
membrane during the period ∆t
∆p Partial water vapour pressure difference across the specimen Pa
p Saturated water vapour pressure at the test room temperature T Pa
sa a
p Saturated water vapour pressure at the water bath temperature T Pa
sb b
RH Relative humidity in equilibrium with saturated potassium acetate solution %
T
Temperature in the test room °C
a
T Temperature of the water bath °C
b
2
WVP Water vapour permeability of the specimen
g/m⋅Pa⋅h
2
WVP
Apparatus water vapour permeability
g/m⋅Pa⋅h
app
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SIST EN ISO 15496:2004
ISO 15496:2004(E)
4 Principle
The specimen to be tested is placed, together with a waterproof but highly water-vapour-permeable,
hydrophobic, microporous membrane (henceforth referred to as “membrane”), on a ring holder and then put in
a water bath so that the membrane is in contact with the water. This is then left for 15 min. A cup containing
saturated potassium acetate solution, creating a relative humidity of about 23 % at the specimen’s upper face,
and covered with a second piece of the same membrane, is weighed and then inverted above the specimen in
the ring holder, so that the membrane is in contact with the specimen. There will be a net transfer of water
vapour through the specimen from the water side to the cup (see Figure 1). After 15 min the cup is taken off
and re-weighed. At the same time a control test without a specimen is carried out to determine the water
vapour permeability of the two membranes, the apparatus water vapour permeability. The water vapour
permeability of the specimen can then be calculated, correcting for the influence of the two membranes.
5 Apparatus
The schematics of the test set-up are shown in Figure 1.
5.1 Membrane
1)
Any membrane used shall be waterproof, microporous and hydrophobic . It shall have a high water vapour
permeability, so that two layers of the membrane have a water vapour permeability of more than
2
1,2 g/m⋅Pa⋅h when measured according to this International Standard.
5.2 Specimen holder
The specimen holder shall be a metal or plastic ring with a milled groove onto which the specimen in
conjunction with the membrane is secured, using a rubber ring that fits into the groove, as shown in Figure 2.
The rubber ring shall fit tightly so that the specimen and membrane are held under tension. The bottom
outside edge of the specimen holder should be radiused.
5.3 Support frame for specimen holders
The support frame should consist of two plates, separated by spacers, that support the specimen holders in
the water (see Figure 3). Both plates should have at least six holes cut out, those in the top plate being large
enough to allow the holder with specimen and membrane to pass through. The holes in the lower plate are
smaller than the specimen holder, but larger than the cup opening, and they are centred to the holes in the top
plate. The support frame is fitted with four vertically adjustable screws so that the specimen holder can be
immersed to a depth of (5 ± 2) mm in the water.
The holes in the support frame should be sequentially numbered.
5.4 Water bath
The water bath shall consist of a transparent glass or plastic tank, large enough to accommodate the support
frame, containing distilled water maintained at (23,0 ± 0,1) °C by means of an immersion thermostat with a
circulation pump. The water temperature shall be measured in at least four positions simultaneously, adjacent
to the four corners of the support frame. In order to obtain a uniform temperature distribution in the water, the
inlet or outlet pipe of the thermostat circulation pump shall be extended by means of a hose to the tank end
opposite the thermostat. Care should be taken to prevent air bubble formation by either boiling the distilled
water prior to use and/or red
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