1、May 2007DEUTSCHE NORM English price group 9No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 59.080.30!,xb;“9856324www.d
2、in.deDDIN EN ISO 9073-14Textiles Test methods for nonwovens Part 14: Coverstock wetback (ISO 9073-14:2006)English version of DIN EN ISO 9073-14:2007-05Textilien Prfverfahren fr Vliesstoffe Teil 14: Auflagen (ISO 9073-14:2006)Englische Fassung DIN EN ISO 9073-14:2007-05www.beuth.deDocument comprises
3、16 pages 08.07DIN EN ISO 9073-14:2007-05 2 National foreword This standard has been published in accordance with a decision taken by Technical Committee CEN/TC 248 “Textiles and textile products” (Secretariat: BSI, United Kingdom) to adopt International Standard ISO 9073-14:2006 as a European Standa
4、rd. ISO 9073-14 was prepared by Technical Committee ISO/TC 38 “Textiles”. At present a DIN committee does not exist for this standard since the parties concerned have not shown any interest in work on the subject. The Normenausschuss Materialprfung (Materials Testing Standards Committee) is obliged
5、to publish the standard, however, as the subject falls in its domain. DIN EN ISO 9073 consists of the following parts, under the general title “Textiles Test methods for nonwovens”: Part 1: Determination of mass per unit area Part 2: Determination of thickness Part 3: Determination of tensile streng
6、th and elongation Part 4: Determination of tear resistance Part 6: Absorption Part 7: Determination of bending length Part 8: Determination of liquid strike-through time (simulated urine) Part 9: Evaluation of drapability including drape coefficient Part 10: Lint and other particles generation in th
7、e dry state Part 11: Run-off Part 12: Demand absorbency Part 13: Repeated liquid strike-through time Part 14: Coverstock wetback The following parts are under preparation: Part 15: Evaluation of air permeability Part 16: Evaluation of water resistance (hydrostatic pressure test) Part 17: Evaluation
8、of water penetration (spray impact) test Part 18: Determination of breaking strength and elongation of nonwoven materials using the grab tensile test The DIN Standards corresponding to the International Standards referred to in the EN are as follows: ISO 186 DIN EN ISO 186 ISO 9073-6 DIN EN ISO 9073
9、-6 ISO 9073-13 DIN EN ISO 9073-13 DIN EN ISO 9073-14:2007-05 3 National Annex NA (informative) Bibliography DIN EN ISO 186, Paper and board Sampling to determine average quality DIN EN ISO 9073-6, Textiles Test methods for nonwovens Part 6: Absorption DIN EN ISO 9073-13, Textiles Test methods for no
10、nwovens Part 13: Repeated liquid strike-through time DIN EN ISO 9073-14:2007-05 4 This page is intentionally blank EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 9073-14February 2007ICS 59.080.30English VersionTextiles - Test methods for nonwovens - Part 14: Coverstockwetback (ISO 9073-14:200
11、6)Textiles - Mthodes dessai pour nontisss - Partie 14:Remouillage de lenveloppe (ISO 9073-14:2006)Textilien - Prfverfahren fr Vliesstoffe - Teil 14: Auflagen(ISO 9073-14:2006)This European Standard was approved by CEN on 21 January 2007.CEN members are bound to comply with the CEN/CENELEC Internal R
12、egulations 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 CEN Management Centre or to any CEN member.This
13、 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 CEN Management Centre has the same status as theofficial versions.CEN members are the
14、national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland an
15、d United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 9073-1
16、4:2007: EContents Page Foreword1 Scope . 2 Normative references . 3 Principle. 4 Material and reagents. 5 Apparatus 6 Procedure 7 Test report . 8 Useful additional information 2 EN ISO 9073-14:2007 (E) 444556. 3Annex A (informative) Precision .Bibliography .881112Foreword The text of ISO 9073-14:200
17、6 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 9073-14:2007 by Technical Committee CEN/TC 248 “Textiles and textile products”, the secretariat of which is held by BSI. This European Standar
18、d shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2007, and conflicting national standards shall be withdrawn at the latest by August 2007. According to the CEN/CENELEC Internal Regulations, the national standard
19、s organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portu
20、gal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 9073-14:2006 has been approved by CEN as EN ISO 9073-14:2007 without any modifications. 3 EN ISO 9073-14:2007 (E) 1 Scope This part of ISO 9073 specifies a test method to examine the a
21、bility of diaper coverstock to resist the transport back onto the skin of a liquid which has already penetrated the coverstock. This test corresponds with the repeated liquid strike-through time described in ISO 9073-13. This test method is intended for quality control and is designed for comparison
22、 of wetback for different nonwoven coverstocks and treatments. It does not simulate in-use conditions for finished products. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For und
23、ated references, the latest edition of the referenced document (including any amendments) applies. ISO 186, Paper and board Sampling to determine average quality ISO 5636-1, Paper and board Determination of air permeance (medium range) Part 1: General method ISO 9073-6, Textiles Test methods for non
24、wovens Part 6: Absorption ISO 9073-13, Textiles Test methods for nonwovens Part 13: Repeated liquid strike-through time 3 Principle A piece of coverstock is placed over a standard absorbent medium (10 plies of filter paper) which is then loaded three times according to the repeated STT method propos
25、ed in ISO 9073-13 with a specific quantity of simulated urine. After the third dose, a simulated baby weight (SBW) is placed onto the coverstock and absorbent medium to ensure even spreading of the liquid. A pre-weighed pick up paper is then placed on the coverstock and the simulated baby weight (SB
26、W) is again put on top. The mass of liquid absorbed by the pick up paper is defined as wetback. 4 EN ISO 9073-14:2007 (E) 4 Material and reagents 4.1 Absorbent pad, consisting of ten plies of filter paper (size 100 mm 100 mm) with the test side upwards, as specified by the supplier. The mean strike-
27、through time, in 10 replicate determinations without the nonwoven, shall be within (1,7 0,3) s. The liquid absorption capacity of paper, as determined by ISO 9073-6, shall be 480 % minimum. 4.2 Simulated urine, consisting of a 9 g/l solution of sodium chloride in deionized water with a surface tensi
28、on of (70 2) mN/m at (23 2) C. This surface tension should be checked before each series of tests, as surface tension may change during storage. 4.3 Pick-up paper, 125 mm 125 mm square. Paper characteristics: the mass per unit area of paper shall be (90 4) g/m2; and the air flow resistance, as deter
29、mined by ISO 5636-1, shall be (1,9 0,3) kPa. 5 Apparatus 5.1 Burette, of 50 ml capacity, with a supporting stand, or 5 ml pipette. 5.2 Funnel, fitted with a magnetic valve, giving a rate of discharge of 25 ml in (3,5 0,25) s. 5.3 Ring stand to support the funnel. 5.4 Strike-through plate (see Figure
30、s 2 and 3) constructed of 25 mm thick transparent acrylic sheet, of total mass (500 5) g, fitted with corrosion-resistant electrodes consisting of 1,6 mm diameter platinum or stainless steel wire set in grooves of cross-section 4,0 mm 7,0 mm cut in the base of the plate and fixed with quick-setting
31、epoxy resin. The electrodes shall be positioned as shown in Figures 2 and 3. The plate surface, electrode surface and the star-shaped orifice shall be clean and free from deposit or particulate matter. Clean regularly, e.g. with mildly abrasive car polish and dry cloth, and/or hot water. 5.5 Base pl
32、ate, of transparent acrylic sheet, approximately 125 mm 125 mm square and 5 mm thick. 5.6 Electronic timer measuring to the nearest 0,01 s. 5.7 Simulated baby weight (SBW), consisting of: a weight, stainless steel base 10 cm 10 cm including a handle, of total mass (4 000 20) g; a polyurethane (PU) f
33、oam rubber, 10 cm 10 cm 2 cm height (as described in 8.4); a polyethylene (PE) film, 25 m thick. Wrap the PE film around the foam, secure the film in place with tape then tape the film and foam to the weight (see Figure 1). 5 EN ISO 9073-14:2007 (E) Key 1 tape 2 4 kg weight 3 PU foam 4 foam plus PE
34、film 5 film Figure 1 Simulated baby weight 6 Procedure This test is conducted in conjunction with the repeated strike-through test (see ISO 9073-13) as follows: 6.1 Set up the ring stand holding the funnel. Make sure that the timer and conductivity detector are switched on, and electrodes are connec
35、ted. 6.2 Cut the nonwoven test pieces, 125 mm 125 mm, selected in accordance with ISO 186, if applicable. 6.3 Prepare one set of 10 plies of filter paper, stacking the paper plies on top of each other, test side upwards. 6.4 Weigh the set of 10 plies of filter paper and place them with the test side
36、 upwards on the strike-through baseplate. The mass (m) of the filter paper will be used as a parameter to determine the total quantity of liquid (Q) required for the wetback test. The quantity of liquid (Q) will be calculated by multiplying m by the loading factor (LF) of the filter paper (see 8.1).
37、 The recommended loading factor is 3,30. 6.5 Place the nonwoven test piece on top of the set of 10 plies of filter paper. Position the nonwoven such that the direction of liquid flow during the test corresponds with the intended use of the nonwoven. For example, for personal hygiene products, the si
38、de of the nonwoven that is intended to be in contact with the users skin shall be facing upwards. 6.6 Place the strike-through plate on the top of the nonwoven with the centre of the plate approximately over the centre of the test piece. Centre the funnel over the orifice in the plate. 6 EN ISO 9073
39、-14:2007 (E) 6.7 Adjust the height of the funnel such that the dispensing tip is (45 1) mm above the top of the instrument baseplate. For Lister equipment 1), this corresponds to the minimum position of the head, as defined by the vertical positioning ring. 6.8 Check whether the timer display shows
40、zero. If not, reset. 6.9 Dispense with the pipette or burette 5,0 ml of test liquid into the funnel, while keeping the discharge valve of the funnel closed. 6.10 Open the magnetic discharge valve of the funnel to discharge the 5,0 ml of liquid. The initial flow of liquid will complete the circuit an
41、d start the electronic timer. The timer will stop when the liquid has penetrated into the nonwoven and dropped below the level of the electrodes in the strike-through plate. At that time, start the stopwatch. 6.11 Record the time indicated by the electronic timer (STT-1). 6.12 Use the stopwatch to r
42、ecord a time interval of 60 s. During this period, dispense a fresh aliquot of 5,0 ml of test liquid into the funnel. 6.13 As the stopwatch reads 60 s, repeat steps 6.10 to 6.12 for measuring the STT of the second dose (STT-2). 6.14 As the stopwatch reads 60 s, repeat steps 6.10 and 6.11 for measuri
43、ng the STT of the third dose (STT-3). 6.15 Add an additional quantity of test liquid (Qadd) in order to reach the specified quantity (Q): Qadd= Q 15 (expressed in millilitres) 6.16 Remove the baseplate with the sample and filter paper from the strike-through apparatus. 6.17 Gently put the 4 kg weigh
44、t assembly (5.7) onto the sample. 6.18 The weight (5.7) remains in place for 3 min to ensure even diffusion of the liquid. 6.19 Remove the weight (5.7) without disturbing the nonwoven test piece. 6.20 Weigh two layers of pick-up paper to an accuracy of 0,001 g, record the mass (m1) and place them on
45、 the test piece. 6.21 Remove residual liquid by wiping the contact surface of the weight (5.7) with a dry tissue, before gently replacing it over the pick up paper. A loading speed should be applied in such a way that the last 5 cm displacement takes (5 1) s (see 8.3). 6.22 The weight remains in pla
46、ce for 2 min 2 s, during which time wetback has occurred. 6.23 Remove the weight and reweigh the pick-up paper (m2) to an accuracy of 0,001 g. 6.24 Calculate the wetback value: mWB= m2 m1(expressed in grams). 6.25 Repeat for the required number of test pieces. A minimum of three tests on test pieces
47、 from each sample is recommended. NOTE If STT-3 is higher than 20 s, indicating non durable treatment of the nonwoven, repeat the test with one dose only. After STT-1 (6.11), add an additional quantity of test liquid Qadd(ml) = Q (ml) 5 ml and measure the wetback according to 6.16 to 6.24. 1) Lister
48、 is an example of a suitable product(s) available commercially. This information is given for the convenience of users of this part of ISO 9073 and does not constitute an endorsement by ISO of this product. 7 EN ISO 9073-14:2007 (E) 7 Test report The test report shall include the following informati
49、on: a) complete identification of the nonwoven material; b) surface tension of simulated urine, if different from the value specified in 4.2; c) testing conditions; d) individual strike-through times, in seconds to an accuracy of 0,1 s; e) individual wetback (expressed in grams) to an accuracy of 0,01 g; f) calculate average and standard deviation of wetback (expressed in grams); g) any deviation from the procedure described in this part of ISO
