EN ISO 9073-12:2004

Textiles - Test methods for nonwovens - Part 12: Demand absorbency (ISO 9073-12:2002)

ISO 9073-12 describes a method for the evaluation of the absorbency of fabrics when one side is in contact with a liquid and the fabric is under mechanical pressure.
This test is designed to allow comparison of absorbent materials such as nonwovens and is not intended to simulate in-use conditions of finished products.
Demand absorbency is also called demand wettability.

Textilien - Prüfverfahren für Vliesstoffe - Teil 12: Bestimmung der Saugfähigkeit (ISO 9073-12:2002)

Textiles - Méthodes d'essai pour nontissés - Partie 12: Absorption par contact unifacial (ISO 9073-12:2002)

L'ISO 9073-12 décrit une méthode pour l'évaluation du pouvoir absorbant d'une étoffe soumise à une pression mécanique alors qu'une face est en contact avec un liquide.
Cet essai vise à permettre de comparer des matériaux absorbants tels que les nontissés, et n'est pas destiné à simuler les conditions d'utilisation de produits finis.
NOTE Le terme anglais «demand absorbency» est également connu sous le terme «demand wettability».

Tekstilije - Metode preskušanja vlaknovin - 12. del: Zahtevana vpojnost (ISO 9073-12:2002)

General Information

• Status: Published
• Publication Date: 21-Dec-2004
• Withdrawal Date: 29-Jun-2005
• ICS: 59.080.30 - Textile fabrics
• Technical Committee: CEN/TC 248 - Textiles and textile products
• Drafting Committee: CEN/TC 248 - Textiles and textile products
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 31-Jul-2009
• Completion Date: 31-Jul-2009
• Ref Project: SIST EN ISO 9073-12:2005 - Textiles - Test methods for nonwovens - Part 12: Demand absorbency (ISO 9073-12:2002)

Relations

• Refers: ISO 3696:1987 - Water for analytical laboratory use - Specification and test methods
• Effective Date: 09-Feb-2026

Overview

EN ISO 9073-12:2004 - Textiles - Test methods for nonwovens - Part 12: Demand absorbency (ISO 9073-12:2002) - specifies a laboratory method to evaluate the absorbency of a fabric when one face is in contact with a liquid under mechanical pressure. Also called demand wettability, the method is intended for comparative testing of absorbent materials (especially nonwovens) and is not intended to simulate final in-use conditions of finished products.

Key Topics and Requirements

• Scope and purpose: Measures liquid uptake when one face contacts liquid under a controlled static pressure to compare absorbent materials.
• Apparatus essentials:
  • Porous glass plate, Ø (60 ± 1) mm, porosity rating 2 (4 µm–90 µm) and calibrated flow rate (see Annex A).
  • Siphon/reservoir assembly and U-tube; reservoir Ø ≈ 80 mm.
  • Hydrophobic polyether–polyurethane foam pad (Ø 55 ± 1 mm, ~2 mm thick) and cylindrical weight such that foam+weight mass = (605 ± 5) g → imposed pressure ≈ (2.50 ± 0.05) kPa.
  • Electronic balance (0.01 g resolution) and data acquisition system (≥ 4 readings/s; high-rate tests may require 8 Hz).
• Test specimens and conditioning:
  • Cut five test pieces per sample, Ø (55 ± 1) mm.
  • Condition samples per ISO 139; use test water per ISO 3696 at (20 ± 2) °C.
• Procedure summary:
  • Attach test piece to foam pad, place on porous plate, record reservoir mass vs time until mass change over previous 5 s ≤ 1% of maximum absorbed mass.
  • Clean porous medium between sets (e.g., sulfochromic acid) and use fresh test liquid for each set.
• Measured outcomes:
  • Maximum absorbed mass (Af) - grams absorbed when equilibrium criterion met.
  • Demand absorbency capacity (DAC) - Af divided by specimen mass (g/g).
  • Maximum absorption rate (MAR) - largest absorbed mass change over a 1 s interval (g/s), calculated from fine time-sampled data.

Applications and Users

• Primary users: nonwoven manufacturers, independent testing laboratories, R&D teams, quality assurance and specification engineers.
• Typical applications:
  • Comparative performance testing of wipes, hygiene materials, medical disposables, filtration and absorbent layers.
  • Material selection and product development where relative absorbency under pressure is an important attribute.
• Note: Results support material comparison and specification; they do not replace real-use clinical or field testing.

Related Standards

• ISO 9073 series (Parts 1–11, 12, etc.) for other nonwoven test methods (mass/area, thickness, tensile, absorption, strike-through).
• ISO 139 (conditioning) and ISO 3696 (water for analytical use) - normative references within EN ISO 9073-12.

Keywords: EN ISO 9073-12:2004, demand absorbency, demand wettability, nonwovens test method, DAC, MAR, porous plate test, textile standard.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Tekstilije - Metode preskušanja vlaknovin - 12. del: Zahtevana vpojnost (ISO 9073-12:2002)Textilien - Prüfverfahren für Vliesstoffe - Teil 12: Bestimmung der Saugfähigkeit (ISO 9073-12:2002)Textiles - Méthodes d'essai pour nontissés - Partie 12: Absorption par contact unifacial (ISO 9073-12:2002)Textiles - Test methods for nonwovens - Part 12: Demand absorbency (ISO 9073-12:2002)59.080.30TkanineTextile fabricsICS:Ta slovenski standard je istoveten z:EN ISO 9073-12:2004SIST EN ISO 9073-12:2005en01-marec-2005SIST EN ISO 9073-12:2005SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 9073-12December 2004ICS 59.080.30English versionTextiles - Test methods for nonwovens - Part 12: Demandabsorbency (ISO 9073-12:2002)Textiles - Méthodes d'essai pour nontissés - Partie 12:Absorption par contact unifacial (ISO 9073-12:2002)Textilien - Prüfverfahren für Vliesstoffe - Teil 12:Bestimmung der Saugfähigkeit (ISO 9073-12:2002)This European Standard was approved by CEN on 21 December 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 9073-12:2004: ESIST EN ISO 9073-12:2005

Foreword
The text of ISO 9073-12:2002 has been prepared by Technical Committee ISO/TC 38 "Textiles” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 9073-12:2004 by 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 June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Endorsement notice
The text of ISO 9073-12:2002 has been approved by CEN as EN ISO 9073-12:2004 without any modifications.
Reference numberISO 9073-12:2002(E)© ISO 2002
INTERNATIONAL STANDARD ISO9073-12First edition2002-11-01Textiles — Test methods for nonwovens —Part 12: Demand absorbency Textiles — Méthodes d'essai pour nontissés — Partie 12: Absorption par contact unifacial
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ISO 2002 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 • CH-1211 Geneva 20 Tel.
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ii
ISO 9073-12:2002(E) © ISO 2002 – All rights reserved
iii Contents Page Foreword.iv 1 Scope.1 2 Normative references.1 3 Terms and definitions.1 4 Principle.2 5 Apparatus.2 6 Assembly of the apparatus.3 7 Preparation and conditioning of test pieces.4 8 Procedure.4 9 Expression of the results.5 10 Test report.8 Annex A (normative)
Determination of flow through the porous medium using the data
acquisition system.9 Annex B (informative)
MAR calculation explanation.11 Annex C (informative)
Precision.12
ISO 9073-12:2002(E) iv
INTERNATIONAL STANDARD ISO 9073-12:2002(E) © ISO 2002 – All rights reserved
1 Textiles — Test methods for nonwovens — Part 12: Demand absorbency 1 Scope This part of ISO 9073 describes a method for the evaluation of the absorbency of fabrics when one side is in contact with a liquid and the fabric is under mechanical pressure. This test is designed to allow comparison of absorbent materials such as nonwovens and is not intended to simulate in-use conditions of finished products. NOTE Demand absorbency is also called demand wettability. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 9073. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 9073 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 139:1973, Textiles — Standard atmospheres for conditioning and testing ISO 3696:1987, Water for analytical laboratory use — Specification and test methods 3 Terms and definitions For the purposes of this part of ISO 9073 the following terms and definitions apply. 3.1 maximum absorbed mass Af mass of liquid absorbed, in grams, at time Tf, when the absorbed mass variation in the previous 5 s time period is lower than 1 % of the absorbed mass corresponding to Tf 3.2 demand absorbency capacity DAC maximum absorbed mass of liquid, Af, divided by the mass of the test piece, m, expressed in grams per gram 3.3 maximum absorption rate MAR maximum change in liquid absorbed mass per time interval, expressed in grams per second SIST EN ISO 9073-12:2005

ISO 9073-12:2002(E) 2
Key 1 Cylindrical weight 5 Reservoir 2 Foam piece 6 Electronic balance 3 Sample 7 Data system 4 Porous glass plate
Figure 1 — Siphon assembly
ISO 9073-12:2002(E) © ISO 2002 – All rights reserved
3 5.1 Plain porous glass plate, diameter (60 ± 1) mm s
...