1、BRITISH STANDARD BS EN ISO 9073-8:1998 Textiles Test methods for nonwovens Part 8: Determination of liquid strike-through time (simulated urine) The European Standard ENISO9073-8:1998 has the status of a British Standard ICS 59.080.30BSENISO9073-8:1998 This British Standard, having been prepared und
2、er the direction of the Sector Board for Materials and Chemicals was published under the authority of the Standards Board and comes into effect on 15 November 1998 BSI 05-1999 ISBN 0 580 30633 X National foreword This British Standard is the English language version of ENISO9073-8:1998. It is identi
3、cal with ISO9073-8:1995. The UK participation in its preparation was entrusted to Technical Committee TCI/24, Physical testing of textiles, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpre
4、tation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fa
5、ct that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI
6、 Standards Catalogue under the section entitled “International Standards Correspondence Index” or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsi
7、ble for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theENISOtitlepage, page 2, the ISO title page, page ii, pages1 to4, aninside
8、back cover and aback cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSENISO9073-8:1998 BSI 05-1999 i Contents Page
9、National foreword Inside front cover Foreword 2 Foreword ii Text of ISO 9073-8 1ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM ENISO9073-8 July1998 ICS59.080.30 Descriptors: See ISO document English version Textiles Test methods for nonwovens Part8: Determination of liquid strike-through
10、time (simulated urine) (ISO9073-8:1995) Textiles Mthodes dessai pour nontisss Partie8: Dtermination du temps de transpercement des liquides (urine artificielle) (ISO9073-8:1995) Textilien Prfverfahren fr Vliesstoffe Teil8: Bestimmung der Durchdringzeit von Flssigkeiten (simulierter Urin) (ISO9073-8:
11、1995) This European Standard was approved by CEN on1 July1998. 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 ref
12、erences concerning such national standards 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 translation under the responsibility of a CEN member
13、into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
14、 Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CE
15、N national Members. Ref. No. EN ISO 9073-8:1998 EENISO9073-8:1998 BSI 05-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC38 “Textiles” of the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee
16、CEN/TC248 “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 January1999, and conflicting national standards shall be withdra
17、wn at the latest by January1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxe
18、mbourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO9073-8:1998 has been approved by CEN as a European Standard without any modification. NOTENormative references to International Standards are listed
19、in Annex ZA (normative). Contents Page Foreword 2 1 Scope 1 2 Normative references 1 3 Definition 1 4 Principle 1 5 Material and reagents 1 6 Apparatus 1 7 Sampling 1 8 Preparation and conditioning of test pieces 1 9 Procedure 3 10 Expression of results 4 11 Test report 4 Annex ZA (normative) Normat
20、ive references to international publications with their relevant European publications Inside back cover Figure 1 Strike-through plate 2 Figure 2 Section across strike-through plate on centreline of25mm diameter cavity 3ENISO9073-8:1998 ii BSI 05-1999 Foreword ISO (the International Organization for
21、 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
22、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. Draft Inte
23、rnational Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote. International Standard ISO9073-8 was prepared by Technical Committee ISO/TC38, Textil
24、es. ISO 9073 consists of the following parts, under the general title Textiles Testmethods for nonwovens: Part 1: Determination of mass per unit area; Part 2: Determination of thickness; Part 3: Determination of tensile strength and elongation; Part 4: Determination of tear resistance; Part 7: Deter
25、mination of bending length; Part 8: Determination of liquid strike-through time (simulated urine); Part 9: Determination of drape coefficient. Descriptors: Textiles, fabrics, non-woven fabrics, tests, water absorption tests, determination, capacity.ENISO9073-8:1998 BSI 05-1999 1 1 Scope This part of
26、 ISO 9073 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. NOTE 1This International Standa
27、rd describes a test method specific to nonwovens. Other International Standards applicable to textile, paper, plastics, rubber or other materials can also be applied to test certain nonwoven characteristics. 2 Normative references The following standards contain provisions which, through reference i
28、n this text, constitute provisions of this part of ISO9073. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO9073 are encouraged to investigate the possibility of applying the most recent editions
29、 of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 139:1973, Textiles Standard atmospheres for conditioning and testing. ISO 186:1994, Paper and board Sampling to determine average quality. ISO 3696:1987, Water for analytical
30、laboratory use Specification and test methods. 3 Definition For the purposes of this part of ISO9073, the following definition applies. 3.1 strike-through time time taken for a known volume of liquid, applied to the surface of a piece of nonwoven coverstock with an absorbent pad underneath, to pass
31、through the nonwoven coverstock 4 Principle A specified quantity of simulated urine is discharged at a specified rate under specified conditions onto a test piece of nonwoven which is placed on a reference absorbent pad. The time taken for all the liquid to penetrate the nonwoven is measured electro
32、nically. 5 Material and reagents 5.1 Reference absorbent pad, consisting of five layers of reference filter paper (100mm 100mm) with the smooth sides uppermost, and having a mean strike-through time in10 determinations without the nonwoven of (3 0,5)s. NOTE 2Information concerning suitable filter pa
33、per may be obtained from: INDA, 1001 Winstead Drive, Suite460, Cary, NC27513, USA; EDANA,157av. Eugne Plasky,B-1040 Brussels. 5.2 Simulated urine, consisting of a9g/l solution of sodium chloride in grade3 water conforming to ISO3696, with a surface tension of (70 2)mN/m. NOTE 3Surface tension should
34、 be checked before each series of tests, as surface tension can alter during storage. NOTE 4The surface tension of adult human urine is published as69mN/m to70mN/m. There is a suggestion that some babies urine could have a lower surface tension (e.g.45mN/m). The surface tension of the simulated urin
35、e used may be adjusted by the addition of a surfactant. Such addition should be reported as a deviation from standard procedure and the surface tension should be stated in the test report. 6 Apparatus 6.1 Burette, of 50ml capacity, with a supporting stand. 6.2 Funnel, fitted with a magnetic valve, g
36、iving a rate of discharge of25ml in (3,5 0,25)s. 6.3 Ring stand, to support the funnel. 6.4 Strike-through plate (see Figure 1 andFigure 2), constructed of transparent acrylic sheet, of total mass500g, fitted with corrosion-resistant electrodes consisting of1,6mm diameter platinum or stainless steel
37、 wire set in grooves of cross-section4,0mm 7,0mm cut in the base of the plate and fixed in place with quick-setting epoxy resin. The electrodes shall be positioned as shown inFigure 2. 6.5 Baseplate, of transparent acrylic sheet, approximately125mm 125mm square and5mm thick. 6.6 Electronic timer, wh
38、ich can be read to the nearest0,01s. NOTE 5The sensitivity of the timing mechanism is such that different apparatus could give results slightly lower or higher than the specification for the standard absorbent pad alone. Users of the method are therefore advised to validate their equipment against r
39、esults provided by the producer of the filter paper. 7 Sampling Carry out sampling in accordance with ISO186, ensuring that the areas from which the samples are taken have no visible flaws and are not creased. 8 Preparation and conditioning of test pieces 8.1 Cut 10 test pieces measuring125mm 125mm.
40、 8.2 Condition the test pieces and filter papers in one of the atmospheres specified in ISO139.ENISO9073-8:1998 2 BSI 05-1999 Figure 1 Strike-through plateENISO9073-8:1998 BSI 05-1999 3 9 Procedure 9.1 Set up the ring stand (6.3) holding the funnel(6.2) and position the burette (6.1) with the tip in
41、side the funnel. 9.2 Place one nonwoven test piece on top of one set of five reference filter papers (5.1) on the baseplate(6.5). Place the nonwoven on the filter paper in such a way that the side of the nonwoven which is intended to be in contact with the users skin is uppermost. Ensure that the el
42、ectrodes in the strike-through plate are clean. Place the strike-through plate (6.4) on top of the non-woven, with the centre of the plate over the centre of the test piece. Centre the burette and the funnel over the plate. 9.3 Adjust the height of the funnel so that it is(5 0,5)mm above the top of
43、the cavity in the plate (i.e.30mm above the test piece). 9.4 Ensure the electrodes are connected to the timer(6.6). Activate the timer and set the clock to zero. 9.5 Fill the burette with simulated urine (5.2). Keep the discharge valve of the funnel closed and run5,0ml of liquid from the burette int
44、o the funnel. 9.6 Open the magnetic discharge valve of the funnel to discharge5,0ml of liquid. The initial flow of liquid will complete the electrical circuit and start the timer. It will stop when all the liquid has penetrated into the nonwoven and fallen below the level of the electrodes in the st
45、rike-through plate. 9.7 Record the time indicated on the electronic timer. 9.8 Repeat for the required number of test pieces. NOTE 6A minimum of10 tests on test pieces from each sample is recommended. Figure 2 Section across strike-through plate on centreline of25mm diameter cavityENISO9073-8:1998 4
46、 BSI 05-1999 10 Expression of results For each sample, calculate the mean strike-through time, in seconds, and the coefficient of variation. 11 Test report The test report shall include the following information: a) a reference to this part of ISO9073; b) all details necessary for complete identific
47、ation of the nonwoven material; c) the conditioning atmosphere used; d) if required, surfactant added and surface tension of simulated urine; e) the individual strike-through times of the tests, in seconds; f) the mean strike-through time, in seconds; g) the coefficient of variation; h) any unusual
48、features noted during the testing, or deviations from the procedure specified in this part of ISO9073.ENISO9073-8:1998 BSI 05-1999 Annex ZA (normative) Normative references to international publications with their relevant European publications This European Standard incorporates by dated or undated
49、 reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. Publication Year Title EN Year ISO 139 1973 Textiles Standard atmospheres for c
