ISO 9073-13:2023

Nonwovens — Test methods — Part 13: Repeated liquid strike-through time (simulated urine)

This document specifies a test method for the determination of the strike-through time (STT) for each of three subsequent doses of liquid (simulated urine) applied to the surface of a test specimen of nonwoven coverstock. This test method is intended for quality control and is designed for comparison of STT for different nonwoven coverstocks. It does not simulate in-use conditions for finished products.

Nontissés — Méthodes d'essai — Partie 13: Temps de transpercement successifs des liquides (urine artificielle)

Le présent document spécifie une méthode d’essai permettant de déterminer le temps de transpercement (TT) de trois quantités de liquide (urine artificielle) appliquées successivement à la surface d’une éprouvette d'essai prélevée dans une enveloppe de couche-culotte en nontissé. La présente méthode d’essai est destinée à être utilisée dans le cadre de contrôles qualité et pour comparer le TT de différentes enveloppes de couche-culotte en nontissé. Elle ne simule pas les conditions d’utilisation des produits finis.

General Information

• Status: Published
• Publication Date: 01-Jun-2023
• ICS: 59.080.30 - Textile fabrics
• Technical Committee: ISO/TC 38 - Textiles
• Drafting Committee: ISO/TC 38 - Textiles
• Current Stage: 6060 - International Standard published
• Start Date: 02-Jun-2023
• Due Date: 26-Jan-2023
• Completion Date: 02-Jun-2023

Relations

• Revises: ISO 9073-13:2006 - Textiles — Test methods for nonwovens — Part 13: Repeated liquid strike-through time
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 9073-13
Second edition
2023-06
Nonwovens — Test methods —
Part 13:
Repeated liquid strike-through time
(simulated urine)
Nontissés — Méthodes d'essai —
Partie 13: Temps de transpercement successifs des liquides (urine
artificielle)
Reference number
ISO 9073-13:2023(E)
© ISO 2023

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ISO 9073-13:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
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ISO 9073-13:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents and materials . 2
6 Apparatus . 3
7 Conditioning . 5
8 Sampling . 5
8.1 General . 5
8.2 Lot size . 5
8.3 Sampling . 5
9 Instrument calibration verification .6
10 Procedure .7
11 Expression of results . 8
12 Precision . 8
13 Test report . 8
Annex A (informative) Precision .10
Annex B (informative) Detailed figures of strike-through tester apparatus .11
Bibliography .13
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ISO 9073-13:2023(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO document should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 38 Textiles, in collaboration with the
European Committee for Standardization (CEN) Technical Committee CEN/TC 248, Textiles and textile
products, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This second edition cancels and replaces the first edition (ISO 9073-13:2006), which has been
technically revised.
The main changes are as follows:
— the title has been changed from "Textiles — Test methods for nonwovens — Part 13: Repeated liquid
strike-through time" to "Nonwovens — Test methods — Part 13: Repeated liquid strike through time
(simulated urine)";
— details of blotter paper pad in 5.1 (former 4.1) and 10.3 (former 6.1) have been changed;
— Clause 10 (former Clause 6, Procedure) has been changed;
— the test report items and addition of blotter paper identification (amount and manufacturer) have
been updated;
— precision data in Annex A has been updated.
A list of all parts in the ISO 9073 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
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INTERNATIONAL STANDARD ISO 9073-13:2023(E)
Nonwovens — Test methods —
Part 13:
Repeated liquid strike-through time (simulated urine)
SAFETY WARNING — This document does not claim to address all of the safety concerns, if
any, associated with its use. It is the responsibility of the user of this document to establish
appropriate safety and health practices and determine the applicability of regulatory limitations
prior to use. It is expected that the person performing this test has been fully trained in all
aspects of this procedure.
1 Scope
This document specifies a test method for the determination of the strike-through time (STT) for
each of three subsequent doses of liquid (simulated urine) applied to the surface of a test specimen of
nonwoven coverstock.
This test method is intended for quality control and is designed for comparison of STT for different
nonwoven coverstocks. It does not simulate in-use conditions for finished products.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 139, Textiles — Standard atmospheres for conditioning and testing
ISO 186, Paper and board — Sampling to determine average quality
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 3951-1, Sampling procedures for inspection by variables — Part 1: Specification for single sampling
plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristic
and a single AQL
ISO 9092, Nonwovens — Vocabulary
ISO 11224, Textiles — Web formation and bonding in nonwovens — Vocabulary
NWSP 010.1, Three Standard Test Methods for Nonwoven Absorption
NWSP 005.0, Nonwoven sampling
NWSP 070.7, Repeated Liquid Strike-Through Time (Simulated Urine)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 9092, ISO 11224 and the
following apply.
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ISO 9073-13:2023(E)
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
sample
product or portion of a product taken from a production lot for testing purposes, identifiable and
traceable back to the origin.
3.2
simulated urine
testing liquid consisting of a 9 g/l solution of sodium chloride in demineralized water with a surface
tension of (70 ± 2) mN/m
3.3
test specimen
specific portion of the identified sample upon which a test is performed, many test specimens sometimes
being tested from the same sample, using different locations.
3.4
strike-through time
STT
time taken for a known volume of liquid to pass through the nonwoven that is in contact with an
underlying dry standard absorbent pad
4 Principle
Three subsequent doses of simulated urine are discharged at a prescribed rate, and under specified
conditions, onto a test specimen of nonwoven which is placed on a reference absorbent pad. The
time taken for each of the liquid doses to penetrate the nonwoven is measured electronically, using
conductometric detection. The absorbent pad remains unchanged and wet between the doses.
5 Reagents and materials
Use reagents of recognized analytical grade, unless otherwise specified, and demineralized water.
5.1 Absorbent pad (blotter paper), consists of 7 layers of blotter paper (100 mm × 100 mm) with
the smooth side up.
The blotter paper shall meet the following specifications:
2
a) The mass per unit area of the paper is (139 ± 11) g/m .
b) The liquid absorption capacity, of the paper, as determined by NWSP 010.1 is at least of 480 %.
c) The mean first strike-through time is 2 s or less, using test procedure NWSP 070.7, but without a
test specimen.
NOTE Information concerning a potential source of suitable blotter paper can be obtained from the
nonwovens industry associations. See References [2] and [3].
5.2 Simulated urine, consisting of a 9 g/l solution of sodium chloride in water (5.3), with a surface
tension of (70 ± 2) mN/m at (23 ± 2) °C. This surface tension should be checked before each series of
tests, as it can alter during storage.
5.3 Grade 3 water, in accordance with ISO 3696.
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ISO 9073-13:2023(E)
6 Apparatus
6.1 Burette, 50 ml capacity with supporting stand, or a 5 ml pipette.
6.2 Strike-through tester (see Figure 1), designed such that it releases a standard aliquot of
simulated urine into a cavity. Through a (star-shaped) opening in the bottom of the well that rests on the
test piece, liquid drains through the test piece into an absorbent pad. The presence and disappearance
of the test liquid in the well is detected conductometrically. The time required for the liquid to drain
from the well is determined by an electronic timer that is connected to the conductometer.
NOTE More details of an example of apparatus can be found in the Annex B, Figure B.1 and Figure B.2.
Key
1 base plate
2 electrodes
3 absorbent
4 nonwoven
5 electrode plate
6 valve
7 saline solution
Figure 1 — Strike-through tester
The instrument consists of the following parts.
a) Funnel, fitted with a magnetic exit valve, capable of discharging 25 ml of saline solution in
(3,5 ± 0,25) s.
b) Support for the funnel so the funnel position can be adjusted vertically. The distance between the
funnel exit and the base plate shall be adjustable from 4,5 cm to at least 15 cm.
c) Electronic conductivity detector capable of detecting saline solution with 0,05 s response time. The
detector should be connected with the electrodes in the strike-through plate 6.2 f). The principle of
electrical wiring should be as indicated in Figure 2:
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ISO 9073-13:2023(E)
Key
1 voltage generator: 1 V, 300 Hz
2 programming resistance 100 kΩ
3 resistance 25 kΩ
4 strike-trough cell
5 voltage metre
Figure 2 — Electrical wiring
...

NORME ISO
INTERNATIONALE 9073-13
Deuxième édition
2023-06
Nontissés — Méthodes d'essai —
Partie 13:
Temps de transpercement successifs
des liquides (urine artificielle)
Nonwovens — Test methods —
Part 13: Repeated liquid strike-through time (simulated urine)
Numéro de référence
ISO 9073-13:2023(F)
© ISO 2023

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ISO 9073-13:2023(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2023
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: [phone]
E-mail: [e-mail]
Web: www.iso.org
Publié en Suisse
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ISO 9073-13:2023(F)
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives .1
3 Termes et définitions . 2
4 Principe. 2
5 Réactifs et matériel . 2
6 Appareillage . 3
7 Conditionnement .5
8 Échantillonnage .5
8.1 Généralités . 5
8.2 Taille du lot . . 5
8.3 Échantillonnage . 5
9 Vérification de l’étalonnage des instruments . 6
10 Mode opératoire . 7
11 Expression des résultats . 8
12 Fidélité . 8
13 Rapport d’essai . 8
Annexe A (informative) Fidélité .10
Annexe B (informative) Figures détaillées du dispositif de transpercement .11
Bibliographie .13
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ISO 9073-13:2023(F)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a
été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir
www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner
l’utilisation d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité
et à l’applicabilité de tout droit de brevet revendiqué à cet égard. À la date de publication du présent
document, l’ISO n'avait pas reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa
mise en application. Toutefois, il y a lieu d’avertir les responsables de la mise en application du présent
document que des informations plus récentes sont susceptibles de figurer dans la base de données de
brevets, disponible à l'adresse www.iso.org/brevets. L’ISO ne saurait être tenue pour responsable de ne
pas avoir identifié tout ou partie de tels droits de propriété.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été élaboré par le comité technique ISO/TC 38 Textiles, en collaboration avec le
comité technique CEN/TC 248, Textiles et produits textiles, du Comité européen de normalisation (CEN)
conformément à l’Accord de coopération technique entre l’ISO et le CEN (Accord de Vienne).
Cette seconde édition annule et remplace la première édition (ISO 9073-13:2006), qui a fait l’objet d’une
révision technique.
Les principales modifications sont les suivantes:
— le titre a été modifié, «Textiles — Méthodes d’essai pour nontissés — Partie 13: Temps de
transpercement successifs des liquides» est devenu «Nontissé — Méthodes d’essai — Partie 13:
Temps de transpercement successifs des liquides (urine artificielle)»;
— les détails relatifs au papier buvard en 5.1 (auparavant 4.1) et 10.3 (auparavant 6.1) ont été modifiés;
— l’Article 10 (auparavant Article 6, mode opératoire) a été modifié;
— les éléments du rapport d’essai et l’ajout de l’identification du papier buvard (quantité et fabricant)
ont été mis à jour;
— les données de fidélité de l’Annexe A ont été mises à jour.
Une liste de toutes les parties de la série ISO 9073 se trouve sur le site web de l’ISO.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes
se trouve à l’adresse www.iso.org/fr/members.html.
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NORME INTERNATIONALE ISO 9073-13:2023(F)
Nontissés — Méthodes d'essai —
Partie 13:
Temps de transpercement successifs des liquides (urine
artificielle)
AVERTISSEMENT DE SÉCURITÉ — Le présent document n’a pas pour but de traiter tous les
problèmes de sécurité qui sont, le cas échéant, liés à son utilisation. Il incombe à l’utilisateur du
présent document d’établir, avant de l’utiliser, des pratiques d’hygiène et de sécurité appropriées
et de déterminer l’applicabilité des restrictions réglementaires. Il est attendu que la personne
qui effectue cet essai ait été entièrement formée à tous les aspects du présent mode opératoire.
1 Domaine d’application
Le présent document spécifie une méthode d’essai permettant de déterminer le temps de
transpercement (TT) de trois quantités de liquide (urine artificielle) appliquées successivement à la
surface d’une éprouvette d'essai prélevée dans une enveloppe de couche-culotte en nontissé.
La présente méthode d’essai est destinée à être utilisée dans le cadre de contrôles qualité et pour
comparer le TT de différentes enveloppes de couche-culotte en nontissé. Elle ne simule pas les
conditions d’utilisation des produits finis.
2 Références normatives
Les documents suivants sont cités dans le texte de sorte qu’ils constituent, pour tout ou partie de leur
contenu, des exigences du présent document. Pour les références datées, seule l’édition citée s’applique.
Pour les références non datées, la dernière édition du document de référence s'applique (y compris les
éventuels amendements).
ISO 139, Textiles — Atmosphères normales de conditionnement et d'essai
ISO 186, Papier et carton — Échantillonnage pour déterminer la qualité moyenne
ISO 2859-1, Règles d'échantillonnage pour les contrôles par attributs — Partie 1: Procédures
d'échantillonnage pour les contrôles lot par lot, indexés d'après le niveau de qualité acceptable (NQA)
ISO 3696, Eau pour laboratoire à usage analytique — Spécification et méthodes d'essai
ISO 3951-1, Règles d'échantillonnage pour les contrôles par mesures — Partie 1: Spécification pour les plans
d’échantillonnage simples indexés d’après un niveau de qualité acceptable (NQA) pour un contrôle lot par lot
pour une caractéristique qualité unique et un NQA unique
ISO 9092, Nontissés — Vocabulaire
ISO 11224, Textiles — Formation et liage du voile dans les nontissés — Vocabulaire
NWSP 010.1, Three Standard Test Methods for Nonwoven Absorption.
NWSP 005.0, Nonwoven sampling.
NWSP 070.7, Repeated Liquid Strike-Through Time (Simulated Urine).
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ISO 9073-13:2023(F)
3 Termes et définitions
Pour les besoins du présent document, les termes et les définitions de l’ISO 9092, l’ISO 11224 ainsi que
les suivants s’appliquent.
L’ISO et l’IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en
normalisation, consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l’adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l’adresse https:// www .electropedia .org/
3.1
échantillon
produit ou partie d’un produit prélevé(e) à partir d’un lot de production à des fins d’essais, identifiable
et avec suivi depuis son origine
3.2
urine artificielle
liquide d’essai, composé d’une solution de chlorure de sodium à 9 g/l dans de l’eau déminéralisée,
avec une tension superficielle de (70 ± 2) mN/m
3.3
éprouvette d'essai
partie spécifique de l’échantillon identifié sur laquelle un essai est effectué, de nombreuses éprouvettes
d’essai provenant du même échantillon, mais de différents emplacements
3.4
temps de transpercement
TT
temps que met un volume connu de liquide pour s’écouler à travers un nontissé placé au-dessus d’un
bloc absorbant sec normalisé et en contact direct avec lui
4 Principe
Trois doses d’urine artificielle sont déversées successivement à un débit spécifié et dans des conditions
définies sur une éprouvette d'essai de nontissé placée sur un bloc absorbant de référence. Le temps mis
par chacune des doses de liquide pour pénétrer le nontissé est mesuré électroniquement, par détection
conductimétrique. Le bloc absorbant n’est pas changé entre chacune des applications et reste donc
humide.
5 Réactifs et matériel
Sauf spécification contraire, utiliser des réactifs de qualité analytique reconnue et de l’eau déminéralisée.
5.1 Bloc absorbant (papier buvard), composé de 7 couches de papier buvard (100 mm x 100 mm)
avec la face lisse vers le haut.
Le papier buvard doit satisfaire aux spécifications suivantes:
2
a) la masse surfacique du papier est de (139 ± 11) g/m ;
b) la capacité d’absorption de liquide du papier utilisé, déterminée conformément à NWSP 010.1,
est de 480 % au minimum;
c) le premier temps de transpercement moyen est inférieur ou égal à 2 s, en utilisant le mode
opératoire d’essai NWSP 070.7, mais sans éprouvette d’essai.
NOTE Des informations concernant une source potentielle de papier buvard approprié peuvent être
obtenues auprès des associations industrielles de nontissés. Voir les Références [2] et [3].
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ISO 9073-13:2023(F)
5.2 Urine artificielle, composée d’une solution de 9 g de chlorure de sodium par litre d’eau (5.3),
ayant une tension superficielle de (70 ± 2) mN/m à (23 ± 2) °C. Il convient de vérifier la valeur de la
tension superficielle avant chaque série d’essais, car elle peut varier durant le stockage.
5.3 Eau de qualité 3, conformément à l’ISO 3696.
6 Appareillage
6.1 Burette, d’une capacité de 50 ml, avec statif, ou pipette de 5 ml.
6.2 Appareil d’essai de transpercement (voir Figure 1), conçu de manière à libérer une aliquote
normalisée d’urine artificielle dans une cavité. À travers une ouverture (en forme d’étoile) dans le fond
du puits qui repose sur l’éprouvette, le liquide s’écoule à travers l’éprouvette dans un bloc absorbant.
La présence et la disparition du liquide d’essai dans le puits sont détectées de manière conductimétrique.
Le temps nécessaire au liquide pour s’écouler du puits est déterminé par un chronomètre électronique
raccordé au conductimètre.
NOTE Des informations plus détaillées portant sur un exemple d’appareillage sont disponibles à l’Annexe B,
à la Figure B.1 et à la Figure B.2.
Légende
1 socle
2 électrodes
3 absorbant
4 nontissé
5 plaque d’électrode
6 soupape
7 solution saline
Figure 1 — Appareil d’essai de transpercement
L’instrument comprend les parties suivantes:
a) un entonnoir, équipé d’une soupape de sortie magnétique, capable de décharger 25 ml de solution
saline en (3,50 ± 0,25) s;
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ISO 9073-13:2023(F)
b) un support pour l’entonnoir pour que la position de l’entonnoir puisse être réglée verticalement.
La distance entre la sortie de l’entonnoir et le socle doit être réglable de 4,5 cm à au moins 15 cm;
c) détecteur de conductivité électronique, pouvant détecter une solution saline avec un temps
de réponse de 0,05 s. Il convient de raccorder le détecteur aux électrodes de la plaque de
transpercement 6.2 f). Il convient que le principe du câblage électrique soit conforme à la Figure 2:
Légende
1 générateur de tension: 1 V, 300 Hz
2 résistance de programmation 100 kΩ
3 résistance 25 kΩ
4 cellule de transpercement
5 voltmètre
Figure 2 — Câblage électrique
d) en général, une valeur seuil est définie pour V. En dessous de la valeur seuil, la cellule est dite
«conductrice» ce qui correspond à la présence de liquide. Au-dessus du seuil, la cellule est dite
«non conductrice», c’est-à-dire qu’il n’y a pas de liquide. Une valeur seuil de 0,150 V s’est avérée
satisfaisante;
e) les équivalents sont autorisés. Pour réussir, la tension appliquée doit alterner à une f
...

ISO /FDIS 9073-13:2023(E)
ISO TC 38/WG 9
Date: 2023-02-13
Secretariat: SAC
Nonwovens — Test methods —
Part 13: Repeated liquid strike through time (simulated urine)

---------------------- Page: 1 ----------------------
ISO/FDIS 9073-13:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of
this publication may be reproduced or utilized otherwise in any form or by any means, electronic or
mechanical, including photocopying, or posting on the internet or an intranet, without prior written
permission. Permission can be requested from either ISO at the address below or ISO’sISO's member body
in the country of the requester.
ISO copyright officeCopyright Office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone : +: + 41 22 749 01 11
Fax : [phone]
Email : [e-mail]
Email: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland.
ii © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 9073-13:2023(E)
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents and materials . 2
6 Apparatus . 3
7 Conditioning . 5
8 Sampling . 5
9 Instrument Calibration Verification . 6
10 Procedure . 7
11 Expression of results . 8
12 Precision . 8
13 Test report . 8
Annex A (informative) Precision . 10
Annex B (informative) Figure B.1 to B.4 . 11
Bibliography . 12

Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 2
5 Reagents and materials . 2
6 Apparatus . 3
7 Conditioning . 6
8 Sampling . 6
8.1 General . 6
8.2 Lot size . 7
8.3 Sampling . 7
9 Instrument calibration verification . 8
10 Procedure . 8
11 Expression of results . 9
12 Precision . 9
13 Test report . 10
© ISO 2023 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/FDIS 9073-13:2023(E)
Annex A (informative) Precision . 11
Annex B (informative) Detailed figures of strike-through tester apparatus . 12
Bibliography . 16


iv © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/FDIS 9073-13:2023(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directiveswww.iso.org/directives).
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. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patentswww.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.htmlwww.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 38 Textiles, in collaboration with the
European Committee for Standardization (CEN) Technical Committee CEN/TC 248, Textiles and textile
products, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This second edition cancels and replaces the first edition (ISO 9073-13:2006), which has been technically
revised.
The main changes are as follows:
— the title has been changed;
— items — the title has been changed from "Textiles — Test methods for nonwovens — Part 13:
Repeated liquid strike-through time" to "Nonwovens — Test methods — Part 13: Repeated liquid
strike through time (simulated urine)";
— details of blotter paper pad in 5.1 (former 4.1) and 10.3 (former 6.1) have been changed (blotter
paper pad details);
— updated of — Clause 10 (former Clause 6, Procedure) has been changed;
— the test report items and addition of blotter paper identification (amount and
manufacturer) have been updated;
© ISO 2023 – All rights reserved v

---------------------- Page: 5 ----------------------
ISO/FDIS 9073-13:2023(E)
— precision data in Annex A has been updated;.
— Items 10.11 and 10.12 changed (cleaning and repetition of the test method)
A list of all parts in the ISO 9073 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at
www.iso.org/members.htmlwww.iso.org/members.html.
vi © ISO 2023 – All rights reserved

---------------------- Page: 6 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 9073-13:2023(E)

Nonwovens –— Test methods — Part 13: Repeated liquid strike
through time (simulated urine)
SAFETY WARNING –— This document does not claim to address all of the safety concerns, if any,
associated with its use. It is the responsibility of the user of this document to establish appropriate safety
and health practices and determine the applicability of regulatory limitations prior to use. It is expected
that the person performing this test has been fully trained in all aspects of this procedure.
1 Scope
This document specifies a test method for the determination of the strike- through time (STT) for each of
three subsequent doses of liquid (simulated urine) applied to the surface of a test specimen of nonwoven
coverstock. The STT is defined as the time taken for a known volume of liquid to pass through the
nonwoven that is in contact with an underlying dry standard absorbent pad.
This test method is intended for quality control and is designed for comparison of STT for different
nonwoven coverstocks. It does not simulate in-use conditions for finished products.

32 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 139, Textiles — Standard atmospheres for conditioning and testing
ISO 186, Paper and board — Sampling to determine average quality
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO ISO 3951-1, Sampling procedures for inspection by variables — Part 1: Specification for single sampling
plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristic
and a single AQL
ISO 9092, Nonwovens — Vocabulary
ISO 11224, Textiles — Web formation and bonding in nonwovens — Vocabulary
NWSP 010.1, Three Standard Test Methods for Nonwoven Absorption
NWSP 005.0, Nonwoven sampling
© ISO 2023 – All rights reserved 1

---------------------- Page: 7 ----------------------
ISO/FDIS 9073-13:2023(E)
NWSP 070.7, Repeated Liquid Strike-Through Time (Simulated Urine)
43 Terms and definitions
For the purposes of this document, the following terms and definitions given in ISO 9092, ISO 11224 and
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obphttps://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/https://www.electropedia.org/
3.1
sample
product or portion of a product taken from a production lot for testing purposes, identifiable and
traceable back to the origin.
3.2
simulated urine
testing liquid consisting of a 9 g/l solution of sodium chloride in demineralized water with a surface
tension of (70 ± ± 2) mN/m
3.3
test specimen
specific portion of the identified sample upon which a test is performed, many test specimens sometimes
being tested from the same sample, using different locations.
3.4
strike-through time
STT
time taken for a known volume of liquid to pass through the nonwoven that is in contact with an
underlying dry standard absorbent pad
54 Principle
Three subsequent doses of simulated urine are discharged at a prescribed rate, and under specified
conditions, onto a test specimen of nonwoven which is placed on a reference absorbent pad. The time
taken for each of the liquid doses to penetrate the nonwoven is measured electronically, using
conductometric detection. The absorbent pad remains unchanged and wet between the doses.
65 Reagents and materials
Use reagents of recognized analytical grade, unless otherwise specified, and demineralized water.
5.1 Absorbent pad (blotter paper), consists of 7 layers of blotter paper (100 mm × × 100 mm) with
the smooth side up.
The blotter paper shall meet the following specifications:
2
a) The mass per unit area of the paper is (139 ± ± 11) g/m .
b) The liquid absorption capacity, of the paper, as determined by NWSP 010.1 is at least of 480 %.
2 © ISO 2023 – All rights reserved

---------------------- Page: 8 ----------------------
ISO/FDIS 9073-13:2023(E)
c) The mean first strike-through time is 2 s or less, using test procedure NWSP 70.7, but without a test
specimen.
NOTE Information concerning a potential source of suitable blotter paper can be obtained from the nonwovens
industry associations. See References [2] and [3].
5.2 Simulated urine, consisting of a 9 g/l solution of sodium chloride in water (5.3), with a surface
tension of (70 ± ± 2) mN/m at (23 ± ± 2) °C. This surface tension should be checked before each series
of tests, as it can alter during storage.

5.3 Grade 3 water, in accordance with ISO 3696.
76 Apparatus
6.1 Burette, 50 ml capacity with supporting stand, or a 5 ml pipette.
6.2 Strike-through tester (see Figure 1), designed such that it releases a standard aliquot of simulated
urine into a cavity. Through a (star-shaped) opening in the bottom of the well that rests on the test piece,
liquid drains through the test piece into an absorbent pad. The presence and disappearance of the test
liquid in the well is detected conductometrically. The time required for the liquid to drain from the well
is determined by an electronic timer that is connected to the conductometer.
NOTE More details of an example of apparatus can be found in the ANNEX Annex B, Figure B;.1 and
Figure B.2.

© ISO 2023 – All rights reserved 3

---------------------- Page: 9 ----------------------
ISO/FDIS 9073-13:2023(E)

Key
1 base plate
2 electrodes
3 absorbent
4 nonwoven
5 electrode plate
6 valve
7 Salinesaline solution


Figure 1 — Strike-through tester
The instrument consists of the following parts:.
a) Funnel, fitted with a magnetic exit valve, capable of discharging 25 ml of saline solution in (3,5
± ± 0,25) s.
b) Support for the funnel so the funnel pos
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 9073-13
ISO/TC 38
Nonwovens — Test methods —
Secretariat: SAC
Voting begins on:
Part 13:
2023-02-27
Repeated liquid strike-through time
Voting terminates on:
(simulated urine)
2023-04-24
Nontissés — Méthodes d'essai —
Partie 13: Temps de transpercement successifs des liquides (urine
artificielle)
ISO/CEN PARALLEL PROCESSING
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 9073-13:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 1 ----------------------
ISO/FDIS 9073-13:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 9073-13
ISO/TC 38
Nonwovens — Test methods —
Secretariat: SAC
Voting begins on:
Part 13:
Repeated liquid strike-through time
Voting terminates on:
(simulated urine)
Nontissés — Méthodes d'essai —
Partie 13: Temps de transpercement successifs des liquides (urine
artificielle)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
ISO/CEN PARALLEL PROCESSING
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 9073-13:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 2 ----------------------
ISO/FDIS 9073-13:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Reagents and materials . 2
6 Apparatus . 3
7 Conditioning . 5
8 Sampling . 5
8.1 General . 5
8.2 Lot size . 5
8.3 Sampling . 5
9 Instrument calibration verification .6
10 Procedure .7
11 Expression of results . 8
12 Precision . 8
13 Test report . 8
Annex A (informative) Precision .10
Annex B (informative) Detailed figures of strike-through tester apparatus .11
Bibliography .13
iii
© ISO 2023 – All rights reserved

---------------------- Page: 3 ----------------------
ISO/FDIS 9073-13:2023(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 38 Textiles, in collaboration with the
European Committee for Standardization (CEN) Technical Committee CEN/TC 248, Textiles and textile
products, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This second edition cancels and replaces the first edition (ISO 9073-13:2006), which has been
technically revised.
The main changes are as follows:
— the title has been changed from "Textiles — Test methods for nonwovens — Part 13: Repeated liquid
strike-through time" to "Nonwovens — Test methods — Part 13: Repeated liquid strike through
time (simulated urine)";
— details of blotter paper pad in 5.1 (former 4.1) and 10.3 (former 6.1) have been changed;
— Clause 10 (former Clause 6, Procedure) has been changed;
— the test report items and addition of blotter paper identification (amount and manufacturer) have
been updated;
— precision data in Annex A has been updated.
A list of all parts in the ISO 9073 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
  © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 9073-13:2023(E)
Nonwovens — Test methods —
Part 13:
Repeated liquid strike-through time (simulated urine)
SAFETY WARNING — This document does not claim to address all of the safety concerns, if
any, associated with its use. It is the responsibility of the user of this document to establish
appropriate safety and health practices and determine the applicability of regulatory limitations
prior to use. It is expected that the person performing this test has been fully trained in all
aspects of this procedure.
1 Scope
This document specifies a test method for the determination of the strike-through time (STT) for
each of three subsequent doses of liquid (simulated urine) applied to the surface of a test specimen of
nonwoven coverstock.
This test method is intended for quality control and is designed for comparison of STT for different
nonwoven coverstocks. It does not simulate in-use conditions for finished products.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 139, Textiles — Standard atmospheres for conditioning and testing
ISO 186, Paper and board — Sampling to determine average quality
ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 3951-1, Sampling procedures for inspection by variables — Part 1: Specification for single sampling
plans indexed by acceptance quality limit (AQL) for lot-by-lot inspection for a single quality characteristic
and a single AQL
ISO 9092, Nonwovens — Vocabulary
ISO 11224, Textiles — Web formation and bonding in nonwovens — Vocabulary
NWSP 010.1, Three Standard Test Methods for Nonwoven Absorption
NWSP 005.0, Nonwoven sampling
NWSP 070.7, Repeated Liquid Strike-Through Time (Simulated Urine)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 9092, ISO 11224 and the
following apply.
1
© ISO 2023 – All rights reserved

---------------------- Page: 5 ----------------------
ISO/FDIS 9073-13:2023(E)
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1
sample
product or portion of a product taken from a production lot for testing purposes, identifiable and
traceable back to the origin.
3.2
simulated urine
testing liquid consisting of a 9 g/l solution of sodium chloride in demineralized water with a surface
tension of (70 ± 2) mN/m
3.3
test specimen
specific portion of the identified sample upon which a test is performed, many test specimens sometimes
being tested from the same sample, using different locations.
3.4
strike-through time
STT
time taken for a known volume of liquid to pass through the nonwoven that is in contact with an
underlying dry standard absorbent pad
4 Principle
Three subsequent doses of simulated urine are discharged at a prescribed rate, and under specified
conditions, onto a test specimen of nonwoven which is placed on a reference absorbent pad. The
time taken for each of the liquid doses to penetrate the nonwoven is measured electronically, using
conductometric detection. The absorbent pad remains unchanged and wet between the doses.
5 Reagents and materials
Use reagents of recognized analytical grade, unless otherwise specified, and demineralized water.
5.1 Absorbent pad (blotter paper), consists of 7 layers of blotter paper (100 mm × 100 mm) with
the smooth side up.
The blotter paper shall meet the following specifications:
2
a) The mass per unit area of the paper is (139 ± 11) g/m .
b) The liquid absorption capacity, of the paper, as determined by NWSP 010.1 is at least of 480 %.
c) The mean first strike-through time is 2 s or less, using test procedure NWSP 70.7, but without a test
specimen.
NOTE Information concerning a potential source of suitable blotter paper can be obtained from the
nonwovens industry associations. See References [2] and [3].
5.2 Simulated urine, consisting of a 9 g/l solution of sodium chloride in water (5.3), with a surface
tension of (70 ± 2) mN/m at (23 ± 2) °C. This surface tension should be checked before each series of
tests, as it can alter during storage.
5.3 Grade 3 water, in accordance with ISO 3696.
2
  © ISO 2023 – All rights reserved

---------------------- Page: 6 ----------------------
ISO/FDIS 9073-13:2023(E)
6 Apparatus
6.1 Burette, 50 ml capacity with supporting stand, or a 5 ml pipette.
6.2 Strike-through tester (see Figure 1), designed such that it releases a standard aliquot of
simulated urine into a cavity. Through a (star-shaped) opening in the bottom of the well that rests on the
test piece, liquid drains through the test piece into an absorbent pad. The presence and disappearance
of the test liquid in the well is detected conductometrically. The time required for the liquid to drain
from the well is determined by an electronic timer that is connected to the conductometer.
NOTE More details of an example of apparatus can be found in the Annex B, Figure B.1 and Figure B.2.
Key
1 base plate
2 electrodes
3 absorbent
4 nonwoven
5 electrode plate
6 valve
7 saline solution
Figure 1 — Strike-through tester
The instrument consists of the following parts.
a) Funnel, fitted with a magnetic exit valve, capable of discharging 25 ml of saline solution in
(3,5 ± 0,25) s.
b) Support for the funnel so the funnel position can be adjusted vertically. The distance between t
...