1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 12625-8:2010Tissue paper and tissueproductsPart 8: Water-absorption time and water-absorption capacity, basket-immersion testmethod (ISO 12625-8:2010)BS EN ISO 12625-8:
2、2010 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO12625-8:2010. It supersedes BS EN ISO 12625-8:2006 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PAI/11, Methods of test for paper, board and pulps.A list of
3、organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 67475 4ICS 85.060; 85.080.20Compliance with a Britis
4、h Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 January 2011.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12625-8 Decem
5、ber 2010 ICS 85.060 Supersedes EN ISO 12625-8:2006English Version Tissue paper and tissue products - Part 8: Water-absorption time and water-absorption capacity, basket-immersion test method (ISO 12625-8:2010) Papier tissue et produits tissues - Partie 8: Temps dabsorption deau et capacit dabsorptio
6、n deau, mthode dessai dimmersion au panier (ISO 12625-8:2010) Tissue-Papier und Tissue-Produkte - Teil 8: Zeit fr die Wasseraufnahme und Wasseraufnahmekapzitt, Korbeintauch-Prfverfahren (ISO 12625-8:2010) This European Standard was approved by CEN on 14 December 2010. CEN members are bound to comply
7、 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 M
8、anagement 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
9、 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, Por
10、tugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any mean
11、s reserved worldwide for CEN national Members. Ref. No. EN ISO 12625-8:2010: EBS EN ISO 12625-8:2010EN ISO 12625-8:2010 (E) 3 Foreword This document (EN ISO 12625-8:2010) has been prepared by Technical Committee CEN/TC 172 “Pulp, paper and board”, the secretariat of which is held by DIN, in collabor
12、ation with Technical Committee ISO/TC 6 “Paper, board and pulps”. 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 2011, and conflicting national standards shall be withdrawn at the latest by
13、June 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 12625-8:2006. According to the CEN/CENELEC
14、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, L
15、uxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN ISO 12625-8:2010ISO 12625-8:2010(E) ISO 2010 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federati
16、on 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
17、. 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. International Standards are drafted in accordance w
18、ith the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires appr
19、oval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 12625-8 was prepared by the European C
20、ommittee for Standardization (CEN) Technical Committee CEN/TC 172, Pulp, paper and board, in collaboration with Technical Committee ISO/TC 6, Paper, board and pulps, Subcommittee SC 2, Test methods and quality specifications for paper and board, in accordance with the Agreement on technical cooperat
21、ion between ISO and CEN (Vienna Agreement). This second edition cancels and replaces the first edition (ISO 12625-8:2006), which has been technically revised. The essential change in this International Standard is the separation of the so-called “manual method” and the excluding of the “automated me
22、thod”. For more details see the Introduction. ISO 12625 consists of the following parts, under the general title Tissue paper and tissue products: Part 1: General principles for the use of terms Part 3: Determination of thickness, bulking thickness and apparent bulk density Part 4: Determination of
23、tensile strength, stretch at break and tensile energy absorption Part 5: Determination of wet tensile strength Part 6: Determination of grammage Part 7: Determination of optical properties Measurement of brightness and colour Part 8: Water-absorption time and water-absorption capacity, basket-immers
24、ion test method Part 9: Determination of ball burst strength Part 12: Determination of tensile strength of perforated lines Calculation of perforation efficiency BS EN ISO 12625-8:2010ISO 12625-8:2010(E) iv ISO 2010 All rights reservedIntroduction This part of ISO 12625 describes one principle for t
25、he determination of water-absorption properties of tissue paper and tissue products, a principle in which sheets of the sample are inserted in a cylindrical basket, which is immersed in water. The results are expressed as water-absorption time, and water-absorption capacity. In European and internat
26、ional trade, both water-absorption time and water-absorption capacity represent important parameters in the field of comparison of tissue products. Both manual and automated methods exist, but the procedure described in this part of ISO 12625 refers to manual devices only. The reason is that precisi
27、on results obtained with the different automatic methods included in an interlaboratory study were not acceptable compared with the results obtained using the manual testing method. Nevertheless, automated test methods may be used, provided that they can be shown to give the same results as the manu
28、al method, in terms of average values and standard deviations. BS EN ISO 12625-8:2010INTERNATIONAL STANDARD ISO 12625-8:2010(E) ISO 2010 All rights reserved 1Tissue paper and tissue products Part 8: Water-absorption time and water-absorption capacity, basket-immersion test method 1 Scope This part o
29、f ISO 12625 specifies a basket-immersion test method for the determination of water-absorption time and water-absorption capacity of tissue paper and tissue products. It is expressly stated that the detection of impurities and contraries in tissue paper and tissue products be applied according to IS
30、O 15755. For the determination of moisture content in tissue paper and tissue products, ISO 287 is applicable. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated reference
31、s, the latest edition of the referenced document (including any amendments) applies. ISO 186, Paper and board Sampling to determine average quality ISO 187, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples
32、 ISO 14487, Pulps Standard water for physical testing 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 absorption time time required for complete wetting of a sample 3.2 water-absorption capacity mass of water that is absorbed per unit mass of
33、 the test piece under specified conditions 4 Principle A test piece of the tissue paper or a tissue product is placed in a cylindrical basket and allowed to immerse in water under its own weight. The time required for complete wetting of the test piece is measured, the mass of water absorbed then be
34、ing determined after a stated immersion time followed by a given draining time, under specified conditions. BS EN ISO 12625-8:2010ISO 12625-8:2010(E) 2 ISO 2010 All rights reserved5 Reagent 5.1 Deionized water, with a conductivity u0,25 mS/m at 25 C, in accordance with ISO 14487. The water temperatu
35、re should be maintained during the test at the temperature used for conditioning and testing. To avoid interference due to contamination of the water from previous test pieces, change the water after each series of tests. 6 Preparation and conditioning of the test pieces 6.1 Sampling If the tests ar
36、e being made to evaluate a lot, select the sample in accordance with ISO 186. When sampling finished roll products, eliminate at least the first six layers and the last six layers because of the possible presence of adhesive or mechanical damage. If the tests are made on another type of sample, make
37、 sure that the test pieces taken are representative of the sample received. 6.2 Conditioning Condition the test pieces in accordance with ISO 187. 6.3 Preparation of test pieces From the sample, prepare five test pieces by cutting test pieces of (76 1) mm width and with the length in the machine dir
38、ection sufficient for the mass of each test piece to be (5,0 0,2) g. When preparing test pieces comprising a number of superimposed sheets, all individual sheets shall have the same face up. If several sheets are cut at once, separate them before testing. Record the mass of each test piece, mo, in g
39、rams, to two decimal places. Other test piece sizes could be agreed between the parties concerned. If another test piece size is used, the dimensions shall be reported in the test report. 7 Manual test method 7.1 Apparatus 7.1.1 Water container, large enough for the basket to be fully submerged when
40、 lying on its side (total volume of at least 3 l). The container shall be filled with deionized water (5.1) to a depth of 100 mm. 7.1.2 Draining equipment, comprising a support which is adjusted so that the hanging cylindrical basket forms a (30 3) angle with the horizontal (see Figure 1). BS EN ISO
41、 12625-8:2010ISO 12625-8:2010(E) ISO 2010 All rights reserved 3Figure 1 Principle of drainage position 7.1.3 Timer, accurate to within 0,01 s within a range of 60 s. 7.1.4 Balance, with an accuracy of 0,001 g. 7.1.5 Cylindrical basket, having the dimensions shown in Figure 2, constructed from any no
42、n-corroding steel gauge wire of 0,5 mm to yield a total mass of (3,0 0,1) g. Dimensions in millimetres Figure 2 Schematic drawing of the cylindrical basket BS EN ISO 12625-8:2010ISO 12625-8:2010(E) 4 ISO 2010 All rights reserved7.2 Procedure 7.2.1 Record the mass of the basket, mb, in grams, to two
43、decimal places. 7.2.2 Roll the test piece such that it matches the curvature of the cylindrical basket. Do not fold it. Place the weighted test piece in the cylindrical basket (7.1.5) so that it is loosely packed with its 76 mm edge parallel to the side of the basket. 7.2.3 Place the test piece in t
44、he cylindrical basket. Position the cylindrical basket at a distance of (25 5) mm from the water surface maintained in a horizontal position. 7.2.4 Maintaining the horizontal orientation, release the cylindrical basket into the water and simultaneously start the timer (7.1.3). 7.2.5 Observe the wett
45、ing of the test piece to determine the moment that complete wetting occurs. 7.2.6 Stop the timer and record the time required for complete wetting of the test piece. 7.2.7 After the exact moment that the complete wetting of the sample is achieved (see 7.2.6), allow the cylindrical basket and test pi
46、ece to remain submerged in the water for a further (30 1) s. NOTE One or two timers can be used to perform the measurements described in 7.2.6 and 7.2.7. 7.2.8 At the exact moment the 30 s immersion period of 7.2.7 is complete, remove the cylindrical basket from the water, keeping it in a horizontal
47、 position. Allow the timer to continue to run. 7.2.9 Hang the cylindrical basket containing the wetted test piece on the support (see 7.1.2) at the required 30 angle to the horizontal. 7.2.10 Allow the test piece to drain for a further (60 1) s. 7.2.11 Immediately weigh the cylindrical basket and te
48、st piece. Record the mass, mn, in grams, to two decimal places. 7.2.12 Repeat the procedure with each of the remaining four test pieces. 7.2.13 Change the water after each series of five tests. 8 Calculation and expression of results Calculate the mean water-absorption time, and the standard deviati
49、on of the five replicate tests, in seconds. Report the water-absorption time, in seconds, to the nearest 0,1 s. Calculate the water-absorption capacity, Wa, in grams of water per gram of each test piece, from Equation (1): nobaommmWm= (1) where mnis the mass of the cylindrical basket and its contents after submersion and draining, in grams, to two decimal places; mois the dry mass of each test piece, in grams, to two decimal places; mbis the mass of the cylindrical basket, in grams, to two
