EN ISO 9073-11:2026

Nonwovens - Test methods - Part 11: Run-off (ISO 9073-11:2026)

ISO 9073-11 describes test methods for measuring the quantity of test liquid (simulated urine) which runs down a nonwoven test piece when a specified mass of test liquid is poured on to the nonwoven test piece superimposed on a standard absorbent media and placed on an inclined plane.
This test method is designed to compare run-off of nonwovens. It is not intended to simulate in-use conditions of finished products.
Three alternative methods are described:
Test I -- the basic method for testing hydrophilic nonwovens;
Test III -- the repeated test, with the same test parameters as in I);
Test III -- the modified method for testing hydrophobic nonwovens specifying another table inclination than in I).

Vliesstoffe - Prüfverfahren - Teil 11: Ablaufverhalten (ISO 9073‑11:2026)

Dieses Dokument legt ein Prüfverfahren fest, um die Menge an Prüfflüssigkeit (simulierter Urin) zu bestimmen, die an einer Vliesstoff-Messprobe abläuft, wenn eine festgelegte Masse Prüfflüssigkeit auf die Messprobe aus Vliesstoff gegossen wird, die auf einem Standard-Aufsaugmedium aufliegt und sich auf einer geneigten Fläche befindet.
Dieses Dokument wurde entwickelt, um das Ablaufverhalten von Vliesstoffen zu vergleichen. Es ist nicht dazu vorgesehen, Gebrauchsbedingungen von Fertigerzeugnissen zu simulieren.
Die drei Prüfverfahren sind:
a)   Option A – Basisverfahren zur Prüfung hydrophiler Vliesstoffe, siehe Anhang A.
b)   Option B – Wiederholungsprüfung mit den gleichen Prüfparametern wie beim Basisverfahren mit zusätzlichen Informationen in Option A, siehe Anhang B.
c)   Option C – modifiziertes Verfahren zur Prüfung hydrophober Vliesstoffe unter Festlegung eines anderen Neigungsgrades, siehe Anhang C.
Das Prüfverfahren wurde entwickelt, um das Wasserabperlvermögen hydrophober Vliesstoffe zu messen. In einem standardmäßigen Neigungswinkel kann bei Option A nicht zwischen verschiedenen Graden der Hydrophobie unterschieden werden. Durch eine Verringerung der Tischneigung ist es möglich, die Unterschiede im Wasserabweisungsvermögen von hydrophoben Vliesstoffen zu beurteilen.
Zu F&E-Zwecken können weitere Eigenschaften gemessen werden, siehe Anhang D.
SICHERHEITSHINWEIS — Diese Norm erhebt nicht den Anspruch, eine vollständige Aufzählung von gegebenenfalls zutreffenden Sicherheitsproblemen zu beinhalten, die mit ihrer Anwendung verbunden sind. Es liegt in der Verantwortung des Anwenders dieses Dokuments, geeignete Praktiken für den Arbeits- und Gesundheitsschutz festzulegen und vor der Anwendung festzulegen, welche einschränkenden Vorschriften gelten. Es wird erwartet, dass die Person, die diese Prüfung durchführt, in allen Aspekten dieses Verfahrens umfassend geschult wurde.

Nontissés - Méthodes d'essai - Partie 11: Écoulement sur plan incliné (ISO 9073-11:2026)

L'ISO 9073-11 décrit des méthodes d'essai pour mesurer la quantité de liquide d'essai (urine artificielle) s'écoulant d'une éprouvette de nontissé lorsqu'une masse spécifiée de liquide d'essai est versée sur l'éprouvette de nontissé posée sur un élément absorbant normalisé placé sur un plan incliné.
Cette méthode d'essai est conçue pour comparer l'écoulement des nontissés. Elle n'est pas destinée à simuler des conditions d'utilisation de produits finis.
Trois méthodes alternatives sont décrites:
Essai I -- Méthode de base pour l'essai de nontissés hydrophiles.
Essai II -- Essai répété, avec les mêmes paramètres d'essai que pour l'essai I.
Essai III -- Méthode modifiée pour l'essai de nontissés hydrophobes spécifiant un angle du plan incliné différent que pour l'essai I.

Vlaknovine - Preskusne metode - 11. del: Odtekanje (ISO 9073-11:2026)

Ta dokument določa preskusne metode za merjenje količine preskusne tekočine (simuliran urin), ki odteče po netkani preskusni vzorčni tkanini, ko se določena masa preskusne tekočine vlije na netkani preskusni vzorec, ki je nameščen na standardnem vpojnem mediju in postavljen na nagnjeno ravnino.
Ta dokument je zasnovan za primerjavo odtekanja netkanih materialov. Ni namenjen simulaciji pogojev uporabe za končne izdelke.
Tri metode so:
a) Možnost A - osnovna metoda za preskušanje hidrofilnih netkanih materialov, glej Prilogo A.
b) Možnost B - ponovljeni preskus, z enakimi preskusnimi parametri kot osnovna metoda z dodatnimi informacijami v Možnosti A, glej Prilogo B.
c) Možnost C - spremenjena metoda za preskušanje hidrofobnih netkanih materialov, ki določa drug naklon, glej Prilogo C.
Preskusna metoda je zasnovana za merjenje odbijanja hidrofobnih netkanih materialov. Pri standardnem kotu naklona Možnost A ne more razlikovati med različnimi stopnjami hidrofobnosti. Z zmanjšanjem naklona mize je mogoče oceniti razliko v odbijanju hidrofobnih netkanih materialov.
Za namene raziskav in razvoja je mogoče meriti tudi druge značilnosti v skladu s Prilogo D.

General Information

• Status: Published
• Publication Date: 03-Feb-2026
• ICS: 59.080.30 - Textile fabrics
• Technical Committee: CEN/TC 248 - Textiles and textile products
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 04-Feb-2026
• Completion Date: 04-Feb-2026
• Ref Project: SIST EN ISO 9073-11:2026 - Nonwovens - Test methods - Part 11: Run-off (ISO 9073-11:2026)

Relations

• Replaces: EN ISO 9073-11:2004 - Textiles - Test methods for nonwovens - Part 11: Run-off (ISO 9073-11:2002)
• Effective Date: 17-Jan-2024
• Consolidated By: ISO 9073-11:2026 - Nonwovens — Test methods — Part 11: Run-off
• Effective Date: 12-Feb-2026

Overview

EN ISO 9073-11:2026, Nonwovens – Test methods – Part 11: Run-off (ISO 9073-11:2026) is an international standard that specifies methods for evaluating the run-off characteristics of nonwoven materials. Developed by CEN and based on ISO collaboration, this standard details procedures for measuring the amount of test liquid (simulated urine) that runs off a nonwoven specimen under controlled laboratory conditions. The testing methodology is designed primarily for comparing the run-off performance of different nonwoven fabrics rather than simulating real-life end-use scenarios.

The standard is essential for quality assurance and research within the nonwoven textiles industry, supporting the consistent performance evaluation of absorbent and repellent materials used in applications such as hygiene products and medical textiles.

Key Topics

EN ISO 9073-11:2026 covers the following key areas:

• Standardized Run-Off Test Methods: Detailed procedures for assessing how much liquid runs off nonwoven fabrics, enabling repeatable comparisons across different samples.
• Three Test Variants:
  • Option A: The basic method for hydrophilic (absorbent) nonwovens.
  • Option B: A repeated test to evaluate performance consistency by subjecting the same sample to multiple liquid discharges.
  • Option C: A modified test with a reduced table inclination, specially tailored for hydrophobic (liquid-repellent) nonwovens.
• Simulated Urine as Test Liquid: Using a standardized solution to mimic typical liquid challenges faced by absorbent products.
• Standard Absorbent Media: Use of specifically defined blotter paper as the absorbent backing to ensure test consistency.
• Sampling and Conditioning: Guidelines for specimen selection, conditioning to standard atmospheric conditions, and preparation to maintain reliability and traceability.
• Data Analysis and Reporting: Calculation of run-off mass and percentage, including requirements for comprehensive test reporting and recommendations for use of SI units.

Applications

EN ISO 9073-11:2026 is widely applied in multiple sectors where nonwoven materials are used, including:

• Hygiene Products: Assessment of coverstock materials in diapers, sanitary napkins, and adult incontinence products to evaluate run-off and absorbency performance.
• Medical Textiles: Evaluation of nonwoven materials for bedding, drapes, surgical gowns, and wound dressings where liquid management is crucial for protection and comfort.
• Product Development and Quality Assurance: Manufacturers utilize this standard to benchmark material performance, compare different suppliers, and ensure compliance with industry expectations.
• Regulatory Compliance: Supports manufacturers in meeting European and international market requirements for test documentation and product claims.
• Research and Innovation: Facilitates R&D teams in optimizing fiber blends or fabric constructions for customized absorbency and repellency.

Related Standards

EN ISO 9073-11:2026 is part of a broader framework of nonwoven test methods and textile standards. Related standards include:

• ISO 9073 Series:
  • ISO 9073-6: Nonwovens - Test methods - Part 6: Absorption
• ISO 139: Textiles - Standard atmospheres for conditioning and testing
• NWSP 010.1: Three Standard Test Methods for Nonwoven Absorption
• NWSP 005.0: Nonwoven Sampling
• NWSP 70.3: Nonwoven Coverstock Liquid Strike‐Through Time Using Simulated Urine
• ISO 2859-1 & ISO 3951-1: General sampling procedures for inspection by attributes and variables

Practical Value

The adoption of EN ISO 9073-11:2026 ensures that manufacturers, laboratories, and product developers in the nonwovens industry use a harmonized and reproducible approach when assessing liquid run-off properties. This drives higher product reliability, customer satisfaction, and regulatory alignment for nonwoven textiles in demanding liquid management applications. For best results, the standard should be implemented as part of a comprehensive quality management or R&D program aligned with other relevant nonwoven test methods.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2026
Vlaknovine - Preskusne metode - 11. del: Odtekanje (ISO 9073-11:2026)
Nonwovens - Test methods - Part 11: Run-off (ISO 9073-11:2026)
Vliesstoffe - Prüfverfahren- Teil11: Bestimmung des Ablaufverhaltens (ISO 9073-
11:2026)
Nontissés - Méthodes d'essai - Partie 11: Écoulement sur plan incliné (ISO 9073-
11:2026)
Ta slovenski standard je istoveten z: EN ISO 9073-11:2026
ICS:
59.080.30 Tkanine Textile fabrics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 9073-11
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2026
EUROPÄISCHE NORM
ICS 59.080.30 Supersedes EN ISO 9073-11:2004
English Version
Nonwovens - Test methods - Part 11: Run-off (ISO 9073-
11:2026)
Nontissés - Méthodes d'essai - Partie 11: Écoulement Vliesstoffe - Prüfverfahren - Teil 11: Ablaufverhalten
sur plan incliné (ISO 9073-11:2026) (ISO 9073-11:2026)
This European Standard was approved by CEN on 27 January 2026.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9073-11:2026 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 9073-11:2026) has been prepared by Technical Committee ISO/TC 38
"Textiles" in collaboration with Technical Committee CEN/TC 248 “Textiles and textile products” the
secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2026, and conflicting national standards shall
be withdrawn at the latest by August 2026.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 9073-11:2004.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 9073-11 has been approved by CEN as EN ISO 9073-11:2026 without any modification.

International
Standard
ISO 9073-11
Second edition
Nonwovens — Test methods —
2026-01
Part 11:
Run-off
Nontissés — Méthodes d'essai —
Partie 11: Écoulement sur plan incliné
Reference number
ISO 9073-11:2026(en) © ISO 2026

ISO 9073-11:2026(en)
© ISO 2026
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
ii
ISO 9073-11:2026(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Conditioning . 2
5 Sampling . 2
5.1 Lot size .2
5.2 Sampling .2
5.3 Laboratory samples .3
5.4 Laboratory test specimens .3
6 Three options of the method . 3
Annex A (normative) Option A — Basic method for testing hydrophilic nonwovens. 4
Annex B (normative) Option B — The repeated test . 10
Annex C (normative) Option C — Modified method for testing hydrophobic nonwovens .13
Annex D (informative) Alternative ways of executing the run-off . 14
Bibliography .15

iii
ISO 9073-11:2026(en)
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 9073-11:2002), which has been technically
revised.
The main changes are as follows:
— the title has been changed from "Textiles — Test methods for nonwovens — Part 11: Run-off" to
"Nonwovens — Test methods — Part 11: Run-off";
— In the scope, Test I to Test III have been changed to Option A to Option C;
— In the scope, the text [For the research and development (R&D) purposes, other characteristics could be
measured according to Annex D] has been added;
— Clause 4, Conditioning, and Clause 5, Sampling, have been introduced in this document;
— former Clause 4 (Test I), Clause 5 (Test II) and Clause 6 (Test III), have been moved to Annex A, Annex B
and Annex C, respectively;
— the content of former Annex A have been moved to a new Annex D.
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
International Standard ISO 9073-11:2026(en)
Nonwovens — Test methods —
Part 11:
Run-off
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 determine 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 test methods to measure the amount of test liquid (simulated urine) which runs
down a nonwoven test specimen when a specified mass of test liquid is poured on the nonwoven test
specimen superimposed on a standard absorbent medium and placed on an inclined plane.
This document is designed to compare run-off of nonwovens. It is not intended to simulate in use conditions
for finished products.
The three methods are:
a) Option A - basic method for testing hydrophilic nonwovens, see Annex A.
b) Option B - repeated test, with the same test parameters as the basic method with additional information
in Option A, see Annex B.
c) Option C - modified method for testing hydrophobic nonwovens specifying another degree of incline,
see Annex C.
The test method is designed to measure the repellency of hydrophobic nonwovens. At the standard
inclination angle, Option A isn’t able to distinguish between different levels of hydrophobicity. By decreasing
the inclination of the table, one can assess the difference in repellence of hydrophobic nonwovens.
For R&D purposes, other characteristics can be measured according to Annex D.
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
NWSP 010.1, Three Standard Test Methods for Nonwoven Absorption
NWSP 005.0, Nonwoven Sampling
NWSP 70.3, Nonwoven Coverstock Liquid Strike‐Through Time Using Simulated Urine
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO 9073-11:2026(en)
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
percent run-off
W
RO
percent mass fraction of the original mass of liquid which runs from the test specimen
3.2
run-off
m
RO
mass of excess liquid in gram that runs from the test specimen
3.3
sample
product or portion of a product taken from a production lot, identifiable and traceable back to the origin
3.4
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
3.5
test specimen
specific portion of the identified sample upon which a test is performed
Note 1 to entry: 5.2 specifies the number of test specimens needed.
4 Conditioning
Bring samples to moisture equilibrium in the standard atmosphere for testing nonwovens as directed in
ISO 139. Equilibrium is considered to have been reached when the increase in mass of the test specimen in
successive weighing made at intervals of not less than 2 hours does not exceed 0,25 % of the mass of the test
specimen.
NOTE While conditioning for a fixed time cannot be accepted in cases of dispute, it can be sufficient in routine
testing to expose the material to the standard atmosphere for testing nonwovens for a reasonable period of time
before the test specimens are tested, i.e. 4 hours.
5 Sampling
5.1 Lot size
A lot should be established based on a logical break in the process or as prescribed by a regulation or
traceability requirements.
Test specimens shall be selected in accordance with NWSP 005.0, if applicable.
5.2 Sampling
If provided in the customer specification, take random sample as directed. If no requirements are provided,
ISO 2859-1 (Sampling procedures for inspection by attributes) or ISO 3951-1 (Sampling procedures for
inspection by variables) can be used. In and of themselves, these are not valid sampling plans by default. An
agreement between the purchaser and supplier requires taking into account process stability, producer’s
risk, consumer’s risk, acceptable quality level and also the cost needs to be established.

ISO 9073-11:2026(en)
In general, if the test characteristic can be considered normally distributed, the sampling procedures for
inspection by variables will require fewer samples. However, small samples may not reflect that normal
distribution and the estimated percent defective can therefore be over or under estimated. In this case, as
well as for attribute data, the sampling procedures for inspection by attributes should be used.
In the absence of any sampling size requirement, Table 1 and Table 2 below can be used. Switching rules are
required to maintain the acceptance quality limit (AQL) protection.
Table 1 — Attributes (1.0 AQL, General Inspection Level II)
Number of units in the lot inclusive Number of units that comprise the lot sample
1 to 150 13
151 to 280 32
281 to 500 50
501 to 1 200 80
Table 2 — Variables (“s” method, General Inspection Level II)
Number of units in the lot inclusive Number of units that comprise the lot sample
1 to 15 3
16 to 25 4
26 to 50 6
51 to 90 9
91 to 150 13
151 to 280 18
281 to 500 25
501 to 1 200 35
An adequate specification or other agreement between the purchaser and supplier requires taking into
account the variability between rolls of nonwoven fabric and between test specimens from a swatch from
a roll of mate
...