ISO 9073-14:2023
(Main)Nonwovens — Test methods — Part 14: Coverstock wetback (simulated urine)
Nonwovens — Test methods — Part 14: Coverstock wetback (simulated urine)
This document specifies a test method for the determination of the ability of diaper coverstock to resist the transport back onto the skin of a liquid which has already penetrated the coverstock. This test corresponds with repeated liquid strike-through time according to NWSP 070.7. This test method is intended for quality control and is designed for comparison of wetback for different nonwoven coverstocks and treatments. It does not simulate in use conditions for finished products.
Nontissés — Méthodes d'essai — Partie 14: Remouillage de l'enveloppe (urine artificielle)
Le présent document spécifie une méthode d’essai pour déterminer la capacité d’une enveloppe pour couches à résister au retour sur la peau d’un liquide qui a déjà pénétré dans l’enveloppe. Cet essai correspond au temps de transpercement successif des liquides décrit dans NWSP 070.7. Cette méthode d’essai est destinée au contrôle de la qualité et permet de comparer le remouillage de différentes enveloppes de couche-culotte en nontissé et de différents traitements. Elle ne simule pas les conditions d’utilisation des produits finis.
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INTERNATIONAL ISO
STANDARD 9073-14
Second edition
2023-06
Nonwovens — Test methods —
Part 14:
Coverstock wetback (simulated urine)
Nontissés — Méthodes d'essai —
Partie 14: Remouillage de l'enveloppe (urine artificielle)
Reference number
ISO 9073-14:2023(E)
© ISO 2023
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ISO 9073-14:2023(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.
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Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
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ISO 9073-14:2023(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 . 3
8 Sampling . 4
8.1 General . 4
8.2 Lot size . 4
8.3 Sampling . 4
9 Procedure .5
10 Expression of results . 7
11 Precision . 7
12 Test report . 7
Annex A (informative) Precision . 8
Annex B (informative) Remarks . 9
Annex C (informative) Detailed figures of strike-through tester apparatus.10
Bibliography .13
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ISO 9073-14:2023(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 9073-14:2006), which has been
technically revised.
The main changes are as follows:
— the title has been changed from "Textiles — Test methods for nonwovens — Part 14: Coverstock
wetback" to "Nonwovens — Test methods — Part 14: Coverstock wetback (simulated urine)";
— descriptions in 5.1, 5.2 and 5.3 have been improved;
— procedure description in 9.3 has been changed;
— report items have been updated and blotter paper identification has been added.
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 9073-14:2023(E)
Nonwovens — Test methods —
Part 14:
Coverstock wetback (simulated urine)
1 Scope
This document specifies a test method for the determination of the ability of diaper coverstock to resist
the transport back onto the skin of a liquid which has already penetrated the coverstock.
This test corresponds with repeated liquid strike-through time according to NWSP 070.7.
This test method is intended for quality control and is designed for comparison of wetback for different
nonwoven coverstocks and treatments. 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 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
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 AQLISO 9092, Nonwovens — Vocabulary
ISO 9073-13, Nonwovens — Test methods — Part 13: Repeated liquid strike-through time (simulated urine)
ISO 11224, Textiles — Web formation and bonding in nonwovens — Vocabulary
ASTM D3574, Standard test method for flexible cellular materials, slab, bonded and moulded urethane
foams.
NWSP 005.0, Nonwoven sampling
NWSP 10.1, Methods for Nonwoven Absorption
NWSP 70.7, 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.
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/
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ISO 9073-14:2023(E)
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 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
A test specimen of coverstock is placed over a standard absorbent medium (ply of blotter paper) which
is then loaded three times according to the repeated STT, in accordance with ISO 9073-13, with a
specific quantity of simulated urine. After the third dose a simulated baby weight (SBW) is placed onto
the coverstock and absorbent medium to ensure even spreading of the liquid.
A pre-weighed pick-up paper is then placed on the coverstock and the weight (SBW) again put on top.
The mass of liquid absorbed by the pickup paper is defined as wetback.
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 paper shall be (139 ± 11) g/m .
b) The liquid absorption capacity, of the paper, as determined by NWSP 010.1, shall be at least 480 %.
c) The mean first strike-through time shall be 2 s or less, using test procedure NWSP 070.7, but
without a test sample.
NOTE Information concerning a potential source of suitable blotter paper can be obtained from the
nonwovens industry associations, see References [6] and [7].
5.2 Simulated urine, consisting of a 9 g/l solution of sodium chloride in water 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 Pick-up (blotter) paper, with dimensions 125 mm × 125 mm, needs to meet the same
specifications as the absorbent pad, see 5.1.
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ISO 9073-14:2023(E)
5.4 Grade 3 water, according to ISO 3696.
6 Apparatus
6.1 Burette, with a 50 ml capacity, with a supporting stand, or 5 ml pipette.
6.2 Funnel, fitted with a magnetic valve, giving a rate of discharge of 25 ml in (3,5 ± 0,25) s.
6.3 Ring stand, to support the funnel.
6.4 Strike-through plate, see Figures C.1 and C.2, constructed of 25 mm thick transparent acrylic
sheet, of total mass (500 ± 5) g, fitted with corrosion-resistant electrodes consisting of 1,6 mm diameter
platinum or stainless-steel wire set in grooves of cross-section 4,0 mm × 7,0 mm cut in the base of the
plate and fixed with quick-setting epoxy resin.
a) The electrodes shall be positioned as shown in Figures C.1 and C.2 in Annex C.
b) Base plate, of transparent acrylic sheet, approximately 125 mm × 125 mm square and the thickness
about 5 mm.
The plate surface, electrode surface and the star-shaped orifice shall be clean and free from deposit or
particulate matter. Clean regularly, e.g. with mildly abrasive car polish and dry cloth, and/or hot water.
6.5 Electronic timer, measuring to the nearest 0,01 s
6.6 Simulated baby weight (SBW), consisting of as the following.
a) A weight, stainless steel base 10 cm × 10 cm including a handle, of total mass (4 000 ± 20) g.
b) A polyurethane foam rubber, 10 cm × 10 cm with a height of 2 cm, and its specifications as follows:
3 3
— Density: 25 kg/m to 75 kg/m (in accordance with ASTM D3574, test A)
— Hardness: 150 N to 250 N for 40 % compression and 5 cm sample (in accordance with
ASTM D3574, test B)
c) A polyethylene film 25 µm thick.
Wrap the polyethylene film around the foam, securing the film in place with tape then taping the film
and foam to the weight (see Figure C.3 in Annex C).
NOTE More remarks can be found on Annex B
7 C
...
NORME ISO
INTERNATIONALE 9073-14
Deuxième édition
2023-06
Nontissés — Méthodes d'essai —
Partie 14:
Remouillage de l'enveloppe (urine
artificielle)
Nonwovens — Test methods —
Part 14: Coverstock wetback (simulated urine)
Numéro de référence
ISO 9073-14:2023(F)
© ISO 2023
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ISO 9073-14:2023(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
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CH-1214 Vernier, Genève
Tél.: +41 22 749 01 11
E-mail: copyright@iso.org
Web: www.iso.org
Publié en Suisse
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ISO 9073-14:2023(F)
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives .1
3 Termes et définitions . 1
4 Principe. 2
5 Réactifs et matériel . 2
6 Appareillage . 3
7 Conditionnement .4
8 Échantillonnage .4
8.1 Généralités . 4
8.2 Taille du lot . . 4
8.3 Échantillonnage . 4
9 Mode opératoire . 5
10 Expression des résultats . 7
11 Fidélité . 7
12 Rapport d’essai . 7
Annexe A (informative) Fidélité .9
Annexe B (informative) Remarques .10
Annexe C (informative) Figures détaillées du dispositif de transpercement .11
Bibliographie .14
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ISO 9073-14:2023(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 9073-14:2006), 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 14: Remouillage de l’enveloppe»
en «Nontissé — Méthodes d’essai — Partie 14: Remouillage de l’enveloppe (urine artificielle)»;
— les descriptions en 5.1, 5.2 et 5.3 ont été améliorées;
— la description du mode opératoire en 9.3 a été modifiée;
— les éléments du rapport ont été mis à jour et l’identification du papier buvard a été ajoutée.
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 9073-14:2023(F)
Nontissés — Méthodes d'essai —
Partie 14:
Remouillage de l'enveloppe (urine artificielle)
1 Domaine d’application
Le présent document spécifie une méthode d’essai pour déterminer la capacité d’une enveloppe pour
couches à résister au retour sur la peau d’un liquide qui a déjà pénétré dans l’enveloppe.
Cet essai correspond au temps de transpercement successif des liquides décrit dans NWSP 070.7.
Cette méthode d’essai est destinée au contrôle de la qualité et permet de comparer le remouillage de
différentes enveloppes de couche-culotte en nontissé et de différents traitements. 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 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 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 9073-13, Nontissés — Méthodes d’essai — Partie 13: Temps de transpercement successifs des liquides
(urine artificielle)
ISO 11224, Textiles — Formation et liage du voile dans les nontissés — Vocabulaire
ASTM D3574, Standard test method for flexible cellular materials, slab, bonded and moulded urethane
foams
NWSP 005.0, Nonwoven sampling
NWSP 10.1, Methods for Nonwoven Absorption
NWSP 70.7, Repeated Liquid Strike-Through Time (Simulated Urine)
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
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ISO 9073-14:2023(F)
— 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
Une éprouvette d’essai d’enveloppe de couche-culotte est placée sur un milieu absorbant normalisé
(pli de papier buvard) sur lequel est ensuite déversée une quantité spécifique d’urine artificielle,
à trois reprises, conformément à la méthode des temps de transpercement successifs décrite dans
l’ISO 9073-13. Après la troisième dose, la masse simulant la pression exercée par un bébé (MSB) est
placée sur l’enveloppe de couche-culotte et le milieu absorbant afin de garantir la répartition uniforme
du liquide.
Un papier absorbant pré-pesé est ensuite placé sur l’enveloppe et la masse (MSB) à nouveau placée par-
dessus.
La masse du liquide absorbée par le papier absorbant est définie comme étant le remouillage.
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 × 100 mm)
avec la face lisse vers le haut.
Le papier buvard doit satisfaire aux spécifications suivantes:
2
a) la masse surfacique du papier doit être de (139 ± 11) g/m ;
b) la capacité d’absorption de liquide du papier utilisé, déterminée conformément à NWSP 010.1,
doit être de 480 % au minimum;
c) le premier temps de transpercement moyen doit être inférieur ou égal à 2 s, en utilisant le mode
opératoire d’essai NWSP 70.7, mais sans éprouvette d’essai.
NOTE Des informations concernant une source potentielle de papier buvard approprié peuvent être
[6] [7]
obtenues auprès des associations industrielles de nontissés, voir Références et .
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ISO 9073-14:2023(F)
5.2 Urine artificielle, composée d’une solution de 9 g de chlorure de sodium par litre d’eau, avec
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 Papier absorbant (buvard), dimensions 125 mm × 125 mm, devant satisfaire aux mêmes
spécifications que le bloc absorbant, voir 5.1.
5.4 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 Entonnoir à soupape magnétique, permettant un débit de 25 ml en (3,50 ± 0,25) s.
6.3 Anneau de statif, pour l’entonnoir.
6.4 Plaque de transpercement, voir Figures C.1 et C.2, constituée d’une feuille d’acrylique
transparent de 25 mm d’épaisseur, ayant une masse totale de (500 ± 5) g, et pourvue d’électrodes
résistantes à la corrosion composées d’un ensemble de fils de platine ou d’acier inoxydable de 1,6 mm
de diamètre. Les électrodes sont fixées dans des rainures de 4,0 mm × 7,0 mm de section transversale,
taillées dans la partie inférieure de la plaque, et sont maintenues en place par de la résine époxy à prise
rapide.
a) Les électrodes doivent être positionnées comme représenté aux Figures C.1 et C.2 de l’Annexe C.
b) Socle, constitué d’une feuille d’acrylique transparent, mesurant environ 125 mm × 125 mm et d’une
épaisseur de 5 mm.
La surface de la plaque, la surface des électrodes et l’orifice en forme d’étoile doivent être propres
et exempts de dépôt ou de matières particulaires. Nettoyer régulièrement, par exemple avec un produit
à polir pour voiture doux et un chiffon sec, et/ou de l’eau chaude.
6.5 Chronomètre électronique, exact à 0,01 s près.
6.6 Masse simulant la pression exercée par un bébé (MSB), composé de ce qui suit.
a) Une masse, en acier inoxydable, d’assise 10 cm × 10 cm, incluant une poignée, ayant une masse
totale de (4 000 ± 20) g.
b) Un caoutchouc mousse de polyuréthanne, 10 cm × 10 cm avec une hauteur de 2 cm et ses
spécifications comme suit:
3 3
— masse volumique: 25 kg/m à 75 kg/m (conformément à l’ASTM D3574, essai A);
— dureté: 150 N à 250 N pour une compression de 40 % et un échantillon de 5 cm (conformément à
l’ASTM D3574, essai B);
c) Un film de polyéthylène ayant une épaisseur de 25 µm.
Enrouler le film de polyéthylène autour de la mousse, l’attacher avec un ruban adhésif, puis fixer le film
et la mousse à la masse à l’aide d’un ruban adhésif (voir Figure C.3 à l’Annexe C).
NOTE Des remarques complémentaires sont disponibles à l’Annexe B
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ISO 9073-14:2023(F)
7 Conditionnement
Amener les échantillons à un état d’équilibre en matière d’humidité dans l’atmosphère normale d
...
2023-04-0802-13
ISO/DIS FDIS 9073-14:2023(E)
ISO TC 38/WG 9
Secretariat: SAC
Nonwovens — Test methods —
Part 14: Coverstock wetback (simulated urine)
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ISO/FDIS 9073-14:2023(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 office Copyright Office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Email: copyright@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland.
ii © ISO 2023 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 9073-14:2023(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 . 2
7 Conditioning . 3
8 Sampling . 3
9 Procedure . 4
10 Expression of results . 6
11 Precision . 6
12 Test report . 6
Annex A (informative) Precision . 8
Annex B (informative) Remarks . 9
Annex C (informative) Figures C.1 to C.3 . 10
Bibliography . 12
Foreword . v
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 . 4
8 Sampling . 4
8.1 General . 4
8.2 Lot size . 4
8.3 Sampling . 4
9 Procedure . 5
10 Expression of results . 7
© ISO 2023 – All rights reserved iii
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ISO/FDIS 9073-14:2023(E)
11 Precision . 7
12 Test report . 7
Annex A (informative) Precision . 9
Annex B (informative) Remarks . 10
Annex C (informative) Detailed figures of strike-through tester apparatus . 11
Bibliography . 16
iv © ISO 2023 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/FDIS 9073-14:2023(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 9073-14:2006), which has been
technically revised.
The main changes are as follows:
— the title has been changed; specifying it is a nonwoven-test method from "Textiles — Test methods
for nonwovens — Part 14: Coverstock wetback" to "Nonwovens — Test methods — Part 14:
Coverstock wetback (simulated urine)";
— improved description ofdescriptions in 5.1, 5.2 and 5.3 have been improved;
— procedure description in 9.3 has been changed;
— Reportreport items have been updated and blotter paper identification has been added.
A list of all parts in the ISO 9073 series can be found on the ISO website.
© ISO 2023 – All rights reserved v
---------------------- Page: 5 ----------------------
ISO/FDIS 9073-14:2023(E)
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 9073-14:2023(E)
Nonwovens — Test methods — Part 14: Coverstock wetback
(simulated urine)
1 Scope
This document specifies a test method for the determination of the ability of diaper coverstock to resist
the transport back onto the skin of a liquid which has already penetrated the coverstock.
This test corresponds with repeated liquid strike-through time according to NWSP 070.7.
This test method is intended for Quality Controlquality control and is designed for comparison of
wetback for different nonwoven coverstocks and treatments. 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 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
NWSP 70.7, Repeated Liquid Strike-Through Time (Simulated Urine)
ISO 9092, Nonwovens — Vocabulary
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 AQLISO 9092, Nonwovens — Vocabulary
ISO 9073-13, Nonwovens — Test methods — Part 13: Repeated liquid strike-through time (simulated
urine)
ISO 11224, Textiles — Web formation and bonding in nonwovens — Vocabulary
ISO 5636-1, Paper and board — Determination of air permeance (medium range) — Part 1: General
method Corrected in French
ASTM D 3574 D3574, Standard test method for flexible cellular materials, slab, bonded and moulded
urethane foams.
NWSP 001.0, Standard Terminology Relating to the Nonwoven Industry, EDANA’s and INDA’s Standard
Procedures
© ISO 2023 – All rights reserved 1
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ISO/FDIS 9073-14:2023(E)
NWSP 005.0, Nonwoven sampling
NWSP 70.7, Repeated Liquid Strike-Through Time (Simulated Urine)
3 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 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
A test specimen of coverstock is placed over a standard absorbent medium (ply of blotter paper) which
is then loaded three times according to the Repeatedrepeated STT according to the , in accordance with
ISO 9073-13, with a specific quantity of simulated urine. After the third dose a Simulated Baby
Weightsimulated baby weight (SBW) is placed onto the coverstock and absorbent medium to ensure
even spreading of the liquid.
A pre-weighed pick-up paper is then placed on the coverstock and the weight (SBW) again put on top.
The mass of liquid absorbed by the pickup paper is defined as wetback.
5 Reagents and materials
Use reagents of recognized analytical grade, unless otherwise specified, and demineralized water.
2 © ISO 2023 – All rights reserved
---------------------- Page: 8 ----------------------
ISO/FDIS 9073-14:2023(E)
5.1 Absorbent pad (blotter paper), consists of 7 layers of blotter paper (100 mm x × 100 mm) with
the smooth side up.
The blotter paper shall meet the following specifications:.
2
a) The mass per unit area of paper isshall be (139 ± ± 11) g/m .
b) The liquid absorption capacity, of the paper, as determined by NWSP 010.1, isshall be at least
480 %.
c) The mean first strike-through time isshall be 2 s or less, using test procedure NWSP 70.7, but
without a test sample.
NOTE Information concerning a potential source of suitable blotter paper can be obtained from the nonwovens
industry associations, see Bibliography. References [6] and [7].
5.2 Simulated urine, consisting of a 9 g/l solution of sodium chloride in water with a surface tension
of (70 ± ± 2) mN/m. This surface tension should be checked before each series of tests, as it can alter
during storage.
5.3 Pick-up (blotter) paper, with dimensions 125 mm x × 125 mm, needs to meet the same
specifications as the absorbent pad, see 5.1.
5.4 Grade 3 water, according to ISO 3696.
6 Apparatus
6.1 Burette, with a 50 ml capacity, with a supporting stand, or 5 ml pipette.
6.2 Funnel, fitted with a magnetic valve, giving a rate of discharge of 25 ml in (3,5 ± ± 0,25) s.
6.3 Ring stand, to support the funnel.
6.4 Strike-through plate, see Figures C.1 and C.2, constructed of 25 mm thick transparent acrylic
sheet, of total mass (500 ± ± 5) g, fitted with corrosion-resistant electrodes consisting of 1,6 mm
diameter platinum or stainless-steel wire set in grooves of cross-section 4,0 mm × × 7,0 mm cut in the
base of the plate and fixed with quick-setting epoxy resin.
a) The electrodes shall be positioned as shown in Figures C.1 and C. 2 in Annex C.
b) Base plate, of transparent acrylic sheet, approximately 125 mm × × 125 mm square and the
thickness about 5 mm.
The plate surface, electrode surface and the star-shaped orifice shall be clean and free from deposit or
particulate matter. Clean r
...
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 9073-14
ISO/TC 38
Nonwovens — Test methods —
Secretariat: SAC
Voting begins on:
Part 14:
2023-02-27
Coverstock wetback (simulated urine)
Voting terminates on:
2023-04-24
Nontissés — Méthodes d'essai —
Partie 14: Remouillage de l'enveloppe (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 9073-14:2023(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 9073-14:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 9073-14
ISO/TC 38
Nonwovens — Test methods —
Secretariat: SAC
Voting begins on:
Part 14:
Coverstock wetback (simulated urine)
Voting terminates on:
Nontissés — Méthodes d'essai —
Partie 14: Remouillage de l'enveloppe (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: +41 22 749 01 11
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: copyright@iso.org
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 9073-14:2023(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 9073-14:2023(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 . 3
8 Sampling . 4
8.1 General . 4
8.2 Lot size . 4
8.3 Sampling . 4
9 Procedure .5
10 Expression of results . 6
11 Precision . 7
12 Test report . 7
Annex A (informative) Precision . 8
Annex B (informative) Remarks . 9
Annex C (informative) Detailed figures of strike-through tester apparatus .10
Bibliography .13
iii
© ISO 2023 – All rights reserved
---------------------- Page: 3 ----------------------
ISO/FDIS 9073-14:2023(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 9073-14:2006), which has been
technically revised.
The main changes are as follows:
— the title has been changed from "Textiles — Test methods for nonwovens — Part 14: Coverstock
wetback" to "Nonwovens — Test methods — Part 14: Coverstock wetback (simulated urine)";
— descriptions in 5.1, 5.2 and 5.3 have been improved;
— procedure description in 9.3 has been changed;
— report items have been updated and blotter paper identification has been added.
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 9073-14:2023(E)
Nonwovens — Test methods —
Part 14:
Coverstock wetback (simulated urine)
1 Scope
This document specifies a test method for the determination of the ability of diaper coverstock to resist
the transport back onto the skin of a liquid which has already penetrated the coverstock.
This test corresponds with repeated liquid strike-through time according to NWSP 070.7.
This test method is intended for quality control and is designed for comparison of wetback for different
nonwoven coverstocks and treatments. 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 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by
acceptance quality limit (AQL) for lot-by-lot inspection
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 AQLISO 9092, Nonwovens — Vocabulary
ISO 9073-13, Nonwovens — Test methods — Part 13: Repeated liquid strike-through time (simulated urine)
ISO 11224, Textiles — Web formation and bonding in nonwovens — Vocabulary
ASTM D3574, Standard test method for flexible cellular materials, slab, bonded and moulded urethane
foams.
NWSP 001.0, Standard Terminology Relating to the Nonwoven Industry, EDANA’s and INDA’s Standard
Procedures
NWSP 005.0, Nonwoven sampling
NWSP 70.7, 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.
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/
1
© ISO 2023 – All rights reserved
---------------------- Page: 5 ----------------------
ISO/FDIS 9073-14:2023(E)
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 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
A test specimen of coverstock is placed over a standard absorbent medium (ply of blotter paper) which
is then loaded three times according to the repeated STT, in accordance with ISO 9073-13, with a
specific quantity of simulated urine. After the third dose a simulated baby weight (SBW) is placed onto
the coverstock and absorbent medium to ensure even spreading of the liquid.
A pre-weighed pick-up paper is then placed on the coverstock and the weight (SBW) again put on top.
The mass of liquid absorbed by the pickup paper is defined as wetback.
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 paper shall be (139 ± 11) g/m .
b) The liquid absorption capacity, of the paper, as determined by NWSP 010.1, shall be at least 480 %.
c) The mean first strike-through time shall be 2 s or less, using test procedure NWSP 70.7, but without
a test sample.
NOTE Information concerning a potential source of suitable blotter paper can be obtained from the
nonwovens industry associations, see References [6] and [7].
5.2 Simulated urine, consisting of a 9 g/l solution of sodium chloride in water with a surface tension
of (70 ± 2) mN/m. This surface tension should be checked before each series of tests, as it can alter
during storage.
5.3 Pick-up (blotter) paper, with dimensions 125 mm × 125 mm, needs to meet the same
specifications as the absorbent pad, see 5.1.
2
© ISO 2023 – All rights reserved
---------------------- Page: 6 ----------------------
ISO/FDIS 9073-14:2023(E)
5.4 Grade 3 water, according to ISO 3696.
6 Apparatus
6.1 Burette, with a 50 ml capacity, with a supporting stand, or 5 ml pipette.
6.2 Funnel, fitted with a magnetic valve, giving a rate of discharge of 25 ml in (3,5 ± 0,25) s.
6.3 Ring stand, to support the funnel.
6.4 Strike-through plate, see Figures C.1 and C.2, constructed of 25 mm thick transparent acrylic
sheet, of total mass (500 ± 5) g, fitted with corrosion-resistant electrodes consisting of 1,6 mm diameter
platinum or stainless-steel wire set in grooves of cross-section 4,0 mm × 7,0 mm cut in the base of the
plate and fixed with quick-setting epoxy resin.
a) The electrodes shall be positioned as shown in Figures C.1 and C.2 in Annex C.
b) Base plate, of transparent acrylic sheet, approximately 125 mm × 125 mm square and the thickness
about 5 mm.
The plate surface, electrode surface and the star-shaped orifice shal
...
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