EN ISO 9073-8:2025

Nonwovens - Test methods - Part 8: Determination of liquid strike-through time (simulated urine) for nonwoven coverstocks (ISO 9073-8:2025)

This document specifies a method for measuring the time of liquid (simulated urine) strike-through for nonwoven coverstocks. The method is suitable for making comparisons between different nonwoven coverstocks. It does not simulate in-use conditions for finished products.

Vliesstoffe - Prüfverfahren - Teil 8: Bestimmung der Durchdringzeit von Vliesstoffauflagen (simulierter Urin) (ISO 9073‑8:2025)

Dieses Dokument legt ein Verfahren zur Messung der Durchdringzeit von Flüssigkeiten (simulierter Urin) für Vliesstoffauflagen fest. Das Verfahren eignet sich für den Vergleich verschiedener Vliesstoffauflagen. Es simuliert keine Einsatzbedingungen für Endprodukte.
SICHERHEITSVORKEHRUNGEN — Dieses Dokument erhebt nicht den Anspruch, eine vollständige Aufzählung von gegebenenfalls zutreffenden Sicherheitsproblemen zu beinhalten, die mit seiner Anwendung verbunden sind. Es liegt in der Verantwortung des Anwenders dieses Dokuments, geeignete Praktiken für den Arbeits- und Gesundheitsschutz zu etablieren 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.

Non-tissés - Méthodes d’essai - Partie 8: Détermination du temps de transpercement des liquides (urine artificielle) pour les enveloppes de couche-culotte en non-tissé (ISO 9073-8:2025)

Le présent document spécifie une méthode pour la détermination du temps de transpercement des liquides (urine artificielle) pour les enveloppes de couche-culotte en non-tissé. La méthode permet d’établir des comparaisons entre différentes enveloppes de couche-culotte en non-tissé. Elle ne simule pas les conditions d’utilisation des produits finis.

Vlaknovine - Preskusne metode - 8. del: Ugotavljanje časa prodiranja tekočine skozi vlaknovino (simulirani seč) za netkane prekrivne tkanine (ISO 9073-8:2025)

General Information

• Status: Published
• Publication Date: 14-Oct-2025
• 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: 15-Oct-2025
• Completion Date: 15-Oct-2025
• Ref Project: SIST EN ISO 9073-8:2025 - Nonwovens - Test methods - Part 8: Determination of liquid strike-through time (simulated urine) for nonwoven coverstocks (ISO 9073-8:2025)

Relations

• Replaces: EN ISO 9073-8:1998 - Textiles - Test methods for nonwovens - Part 8: Determination of liquid strike-through time (simulated urine) (ISO 9073-8:1995)
• Effective Date: 17-Jan-2024

Overview

EN ISO 9073-8:2025 is a European and international standard specifying a test method for measuring the liquid strike-through time of nonwoven coverstocks using simulated urine. This method enables standardized comparisons of different nonwoven materials' ability to resist liquid penetration. While designed for laboratory testing of nonwoven coverstocks, it does not replicate actual in-use conditions of finished products such as diapers or sanitary pads. This updated standard, approved by CEN in October 2025, supersedes the 1998 version, refining procedures to enhance consistency and accuracy.

Key Topics

• Scope and Purpose
  Provides a reliable, reproducible procedure to quantify how quickly simulated urine penetrates nonwoven coverstocks-a critical parameter for evaluating material performance, especially in hygiene products.

• Test Principle
  A fixed volume (5 ml) of simulated urine is dispensed at a controlled rate onto the surface of a nonwoven specimen placed atop a reference absorbent pad. The time until the liquid passes completely through the coverstock (strike-through time) is measured electronically using corrosion-resistant electrodes embedded in a transparent strike-through plate.

• Materials and Reagents

  • Simulated urine is a sodium chloride solution with controlled surface tension (~70 mN/m) to mimic human urine characteristics. Surface tension adjustments via surfactants are allowed but must be reported.
  • A multi-layer reference absorbent pad of specific filter papers is used to standardize liquid absorption.

• Apparatus
  Includes burette, magnetic-valve funnel, acrylic strike-through plate with electrodes, ring stand, baseplate, and an electronic timer with high sensitivity (0.01 s resolution).

• Preparation and Sampling
  Specimens sized 125 mm × 125 mm are prepared, conditioned under standard atmospheric conditions, and tested in at least 10 replicates for statistical reliability.

• Data Reporting
  Results are expressed as the mean strike-through time and the coefficient of variation for each nonwoven coverstock sample. The test report should detail all relevant parameters, including any deviations such as surfactant usage.

Applications

• Hygiene Product Development
  Essential for manufacturers of diapers, incontinence pads, and sanitary products requiring precise control over liquid barrier properties of coverstocks.

• Quality Control and Material Comparison
  Enables objective comparisons between alternative nonwoven materials, assisting in raw material selection and supplier evaluations.

• Research and Innovation
  Facilitates testing of new fibers, finishes, or composites aimed at improving liquid strike-through resistivity and overall product comfort.

• Standardization Compliance
  Assists companies in meeting international regulations and market requirements by providing verifiable test data aligned with ISO and CEN standards.

Related Standards

• ISO 139 – Standard Atmospheres for Conditioning and Testing Textiles
  Provides environmental criteria for conditioning test specimens before testing.

• ISO 186 – Sampling to Determine Average Quality of Paper and Board
  Guides representative sampling methods applicable to test specimen selection.

• ISO 3696 – Water for Analytical Laboratory Use
  Covers specifications and test methods for water quality, important when preparing simulated urine.

• EN ISO 9073 Series
  Includes various test methods for evaluating physical properties of nonwovens, such as tensile strength and permeability.

---

Adhering to EN ISO 9073-8:2025 guarantees consistent and comparably accurate measurement of liquid strike-through time for nonwoven coverstocks, fostering innovation and quality improvements in textile and hygiene industries worldwide.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2025
Vlaknovine - Preskusne metode - 8. del: Ugotavljanje časa prodiranja tekočine
skozi vlaknovino (simulirani seč) za netkane prekrivne tkanine (ISO 9073-8:2025)
Nonwovens - Test methods - Part 8: Determination of liquid strike-through time
(simulated urine) for nonwoven coverstocks (ISO 9073-8:2025)
Textilien - Prüfverfahren für Vliesstoffe - Teil 8: Bestimmung der Durchdringzeit von
Flüssigkeiten (simulierter Urin) (ISO 9073-8:2025)
Nontissés - Méthodes d’essai - Partie 8: Détermination du temps de transpercement des
liquides (urine artificielle) pour les enveloppes de couche-culotte en nontissé (ISO 9073-
8:2025)
Ta slovenski standard je istoveten z: EN ISO 9073-8:2025
ICS:
59.080.30 Tkanine Textile fabrics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 9073-8
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2025
EUROPÄISCHE NORM
ICS 59.080.30 Supersedes EN ISO 9073-8:1998
English Version
Nonwovens - Test methods - Part 8: Determination of
liquid strike-through time (simulated urine) for nonwoven
coverstocks (ISO 9073-8:2025)
Non-tissés - Méthodes d'essai - Partie 8: Détermination Textilien - Prüfverfahren für Vliesstoffe - Teil 8:
du temps de transpercement des liquides (urine Bestimmung der Durchdringzeit von Flüssigkeiten
artificielle) pour les enveloppes de couche-culotte en (simulierter Urin) (ISO 9073-8:2025)
non-tissé (ISO 9073-8:2025)
This European Standard was approved by CEN on 13 October 2025.

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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9073-8:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 9073-8:2025) 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 April 2026, and conflicting national standards shall be
withdrawn at the latest by April 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 9073-8:1998.
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 9073-8:2025 has been approved by CEN as EN ISO 9073-8:2025 without any
modification.
International
Standard
ISO 9073-8
Second edition
Nonwovens — Test methods —
2025-10
Part 8:
Determination of liquid strike-
through time (simulated urine) for
nonwoven coverstocks
Non-tissés — Méthodes d’essai —
Partie 8: Détermination du temps de transpercement des liquides
(urine artificielle) pour les enveloppes de couche-culotte en non-tissé
Reference number
ISO 9073-8:2025(en) © ISO 2025

ISO 9073-8:2025(en)
© ISO 2025
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 9073-8:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Material and reagent . 2
6 Apparatus . 2
7 Sampling . 4
8 Preparation and conditioning of test specimen . 4
9 Procedure . 4
10 Expression of results . 5
11 Test report . 5

iii
ISO 9073-8:2025(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 acc
...