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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 EN ISO 9073-8:1998 has the status of a British Standard ICS 59.080.30 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:28:04
2、 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 9073-8:1998 This British Standard, having been prepared under 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
3、30633 X National foreword This British Standard is the English language version of EN ISO 9073-8:1998. It is identical with ISO 9073-8:1995. The UK participation in its preparation was entrusted to Technical Committee TCI/24, Physical testing of textiles, which has the responsibility to: aid enquire
4、rs to understand the text; present to the responsible international/European committee any enquiries on the interpretation, 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 repr
5、esented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British S
6、tandards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index” or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Stan
7、dard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible 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,
8、 an inside front cover, pages i and ii, the EN ISO title page, page 2, the ISO title page, page ii, pages 1 to 4, an inside back cover and a back 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
9、inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:28:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 9073-8:1998 BSI 05-1999i Contents Page National forewordInside front cover Foreword2 Forewordii Text of IS
10、O 9073-81 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:28:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:28:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 9073-8 Jul
11、y 1998 ICS 59.080.30 Descriptors: See ISO document English version Textiles Test methods for nonwovens Part 8: Determination of liquid strike-through time (simulated urine) (ISO 9073-8:1995) Textiles Mthodes dessai pour nontisss Partie 8: Dtermination du temps de transpercement des liquides (urine a
12、rtificielle) (ISO 9073-8:1995) Textilien Prfverfahren fr Vliesstoffe Teil 8: Bestimmung der Durchdringzeit von Flssigkeiten (simulierter Urin) (ISO 9073-8:1995) This European Standard was approved by CEN on 1 July 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
13、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 Central Secretariat or to any CEN member. This European Standa
14、rd 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 Central Secretariat has the same status as the official versions. CEN members are the national standa
15、rds bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee
16、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 CEN national Members. Ref. No. EN ISO 9073-8:1998 E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:28:04 GMT+00:00 2006, Uncontrolled
17、 Copy, (c) BSI EN ISO 9073-8:1998 BSI 05-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC 38 “Textiles” of the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee CEN/TC 248 “Textiles and textil
18、e 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 January 1999, and conflicting national standards shall be withdrawn at the latest by January 1
19、999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway
20、, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 9073-8:1998 has been approved by CEN as a European Standard without any modification. NOTENormative references to International Standards are listed in Annex ZA (normative). C
21、ontents Page Foreword2 1Scope1 2Normative references1 3Definition1 4Principle1 5Material and reagents1 6Apparatus1 7Sampling1 8Preparation and conditioning of test pieces1 9Procedure3 10Expression of results4 11Test report4 Annex ZA (normative) Normative references to international publications with
22、 their relevant European publicationsInside back cover Figure 1 Strike-through plate2 Figure 2 Section across strike-through plate on centreline of 25 mm diameter cavity3 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:28:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffie
23、ldun sheffieldun, na, Sun Nov 19 13:28:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 9073-8:1998 ii BSI 05-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Sta
24、ndards 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
25、take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Internation
26、al Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 9073-8 was prepared by Technical Committee ISO/TC 38, Textiles. ISO 9073 consists of the following parts, under the general title Textiles Test methods for nonwovens: Part 1: Determination
27、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: Determination of bending length; Part 8: Determination of liquid strike-through time (simulated urine); Part 9: Determination of drap
28、e coefficient. Descriptors: Textiles, fabrics, non-woven fabrics, tests, water absorption tests, determination, capacity. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:28:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 9073-8:1998 BSI 05-19991 1 Scope This part of ISO 9073 specifies
29、 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 Standard describes a test
30、 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 in this text, consti
31、tute provisions of this part of ISO 9073. 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 ISO 9073 are encouraged to investigate the possibility of applying the most recent editions of the standards
32、 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 laboratory use Sp
33、ecification and test methods. 3 Definition For the purposes of this part of ISO 9073, 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 through the nonw
34、oven 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 electronically. 5 Mater
35、ial and reagents 5.1 Reference absorbent pad, consisting of five layers of reference filter paper (100 mm 100 mm) with the smooth sides uppermost, and having a mean strike-through time in 10 determinations without the nonwoven of (3 0,5) s. NOTE 2Information concerning suitable filter paper may be o
36、btained from: INDA, 1001 Winstead Drive, Suite 460, Cary, NC 27513, USA; EDANA, 157 av. Eugne Plasky, B-1040 Brussels. 5.2 Simulated urine, consisting of a 9 g/l solution of sodium chloride in grade 3 water conforming to ISO 3696, with a surface tension of (70 2) mN/m. NOTE 3Surface tension should b
37、e checked before each series of tests, as surface tension can alter during storage. NOTE 4The surface tension of adult human urine is published as 69 mN/m to 70 mN/m. There is a suggestion that some babies urine could have a lower surface tension (e.g. 45 mN/m). The surface tension of the simulated
38、urine 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 50 ml capacity, with a supporting stand. 6.2 Funnel, fitted with a magnetic val
39、ve, 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 Figure 1 and Figure 2), constructed of transparent acrylic sheet, of total mass 500 g, fitted with corrosion-resistant electrodes consisting of 1,6 mm diameter platinum or st
40、ainless steel wire set in grooves of cross-section 4,0 mm 7,0 mm cut in the base of the plate and fixed in place with quick-setting epoxy resin. The electrodes shall be positioned as shown in Figure 2. 6.5 Baseplate, of transparent acrylic sheet, approximately 125 mm 125 mm square and 5 mm thick. 6.
41、6 Electronic timer, which can be read to the nearest 0,01 s. 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 t
42、heir equipment against results provided by the producer of the filter paper. 7 Sampling Carry out sampling in accordance with ISO 186, 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 pie
43、ces measuring 125 mm 125 mm. 8.2 Condition the test pieces and filter papers in one of the atmospheres specified in ISO 139. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:28:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 9073-8:1998 2 BSI 05-1999 Figure 1 Strike-through plate Licen
44、sed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:28:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 9073-8:1998 BSI 05-19993 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 inside the funnel. 9.2 Place one nonwoven test piece
45、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 electrodes in the strike-through plate are clean. Pl
46、ace 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 the cavity in the plate (i.e. 30 mm above the te
47、st 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 run 5,0 ml of liquid from the burette into the funnel. 9.6 Open the magnetic dischar
48、ge valve of the funnel to discharge 5,0 ml 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 strike-through plate. 9.7 Record the time i
49、ndicated on the electronic timer. 9.8 Repeat for the required number of test pieces. NOTE 6A minimum of 10 tests on test pieces from each sample is recommended. Figure 2 Section across strike-through plate on centreline of 25 mm diameter cavity Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:28:04 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 9073-8:1998 4 BSI 05-1999 10 Expression of results For each sample, calculate the mean strike-through time, in seconds, and the coefficient
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