1、BS EN ISO12625-12:2010ICS 85.080.20NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDTissue paper and tissueproductsPart 12: Determination of tensilestrength of perforated lines Calculation of perforation efficiency(ISO 12625-12:2010)This British Standardwas publi
2、shed under theauthority of the StandardsPolicy and StrategyCommittee on 31 March2010 BSI 2010ISBN 978 0 580 63332 4Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 12625-12:2010National forewordThis British Standard is the UK implementation of EN ISO12625-12:2010.The UK participa
3、tion in its preparation was entrusted to TechnicalCommittee PAI/11, Methods of test for paper, board and pulps.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. User
4、s are responsible for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12625-12 January 2010 ICS 85.080.20 English Version Tissue paper and tissue products - Part 12: Determination of tens
5、ile strength of perforated lines - Calculation of perforation efficiency (ISO 12625-12:2010) Papier tissue et produits tissues - Partie 12: Dtermination de la rsistance la rupture par traction des lignes de prdcoupe - Calcul de lefficacit des perforations (ISO 12625-12:2010) Tissue-Papier und Tissue
6、-Produkte - Teil 12: Bestimmung der breitenbezogenen Bruchkraft an Perforationen - Berechnung der Perforations-Effizienz (ISO 12625-12:2010) This European Standard was approved by CEN on 9 January 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the con
7、ditions 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 Management Centre or to any CEN member. This European Standard exists in th
8、ree 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of
9、 Austria, Belgium, Bulgaria, Croatia, 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 and United Kingdom.
10、 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 means reserved worldwide for CEN national Members. Ref. No. EN ISO 12625-12:2010: EBS
11、EN ISO 12625-12:2010EN ISO 12625-12:2010 (E) 3 Foreword This document (EN ISO 12625-12:2010) has been prepared by Technical Committee CEN/TC 172 “Pulp, paper and board”, the secretariat of which is held by DIN, in collaboration with Technical Committee ISO/TC 6 “Paper, board and pulps”. This Europea
12、n Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2010, and conflicting national standards shall be withdrawn at the latest by July 2010. Attention is drawn to the possibility that some of the elements of
13、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. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European S
14、tandard: Austria, Belgium, Bulgaria, Croatia, 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 and the Uni
15、ted Kingdom. BS EN ISO 12625-12:2010ISO 12625-12:2010(E) ISO 2010 All rights reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .2 4 Principle2 5 Apparatus.2 5.1 Tensile-testing apparatus.2 5.2 Tensile-tester clamps2 5.3 Cutting device3 6 Sa
16、mpling.3 7 Conditioning 3 8 Preparation of test pieces.3 8.1 Dimensions 3 8.2 Number of test pieces.4 9 Procedure.4 9.1 General .4 9.2 Non-perforated test pieces.4 9.3 Perforated test pieces.4 10 Calculation .6 10.1 Tensile strength.6 10.2 Calculation of perforation efficiency .6 11 Test report6 12
17、Precision.7 12.1 General .7 12.2 Tensile strength of non-perforated and perforated products.8 12.3 Perforation efficiency9 Annex A (informative) Influence of a pre-cut in the perforation line .10 Annex B (informative) Influence of paper ageing 12 Bibliography14 BS EN ISO 12625-12:2010ISO 12625-12:20
18、10(E) iv ISO 2010 All rights reservedForeword ISO (the International Organization for 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
19、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 take part in the work. ISO collaborates closely with the International Electrotech
20、nical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with 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 t
21、he technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval 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 right
22、s. ISO shall not be held responsible for identifying any or all such patent rights. ISO 12625-12 was prepared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 172, Pulp, paper and board, in collaboration with Technical Committee ISO/TC 6, Paper, board and pulps, Subcomm
23、ittee SC 2, Test methods and quality specifications for paper and board, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). ISO 12625 consists of the following parts, under the general title Tissue paper and tissue products: Part 1: General principles f
24、or the use of terms Part 3: Determination of thickness, bulking thickness and apparent bulk density Part 4: Determination of 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 optic
25、al properties Part 8: Water-absorption time and water-absorption capacity, basket-immersion test method Part 9: Determination of ball burst strength Part 12: Determination of tensile strength of perforated lines Calculation of perforation efficiency The following part is under preparation: Part 13:
26、Determination of the spectral reflectance factor (brightness) at the wavelength R 457 nm with and without UV stimulus and opacity BS EN ISO 12625-12:2010ISO 12625-12:2010(E) ISO 2010 All rights reserved vIntroduction Tissue papers such as toilet paper and kitchen towel are often pre-cut. They are us
27、ed after separation of two consecutive sheets. It is important to know the efficiency of the pre-cut perforations. The perforation strength should be enough to ensure the product cohesion, but not too high, so that sheets can be easily separated. Depending on the type of tissue product, forces can b
28、e applied perpendicular to the perforation lines, or in the direction of the perforation lines. This part of ISO 12625 has been prepared by harmonizing those standards applicable to tissue paper and tissue products that are currently in use. It specifies a procedure to determine perforation efficien
29、cy based on the method described in ISO 12625-4 for the determination of the tensile strength of tissue paper and tissue products. BS EN ISO 12625-12:2010BS EN ISO 12625-12:2010INTERNATIONAL STANDARD ISO 12625-12:2010(E) ISO 2010 All rights reserved 1Tissue paper and tissue products Part 12: Determi
30、nation of tensile strength of perforated lines Calculation of perforation efficiency 1 Scope This part of ISO 12625 specifies a test method for the determination of the tensile strength of perforated lines of tissue paper. It uses a tensile-testing apparatus operating with a constant rate of elongat
31、ion. This method is only used for measuring machine-direction tensile strength, that is for cross-direction perforations on tissue paper. The calculation of perforation efficiency is also specified in this part of ISO 12625. It is expressly stated that the detection of impurities and contraries in t
32、issue paper and tissue products can be carried out according to ISO 15755. For the determination of moisture content in tissue paper and tissue products, ISO 287 can be applied. 2 Normative references The following referenced documents are indispensable for the application of this document. For date
33、d references, only the edition cited applies. For undated references, 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
34、procedure for monitoring the atmosphere and conditioning of samples ISO 536, Paper and board Determination of grammage ISO 1924-2, Paper and board Determination of tensile properties Part 2: Constant rate of elongation method (20 mm/min) ISO 7500-1, Metallic materials Verification of static uniaxial
35、 testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system ISO 12625-1, Tissue paper and tissue products Part 1: General guidance on terms BS EN ISO 12625-12:2010ISO 12625-12:2010(E) 2 ISO 2010 All rights reserved3 Terms and definitions
36、For the purposes of this document, the terms and definitions given in ISO 12625-1 and the following apply. 3.1 tensile strength S maximum tensile force per unit width that a test piece will withstand before breaking in a tensile test 3.2 perforation efficiency Epdifference between the tensile streng
37、ths of non-perforated and perforated material from the same sample divided by the tensile strength of non-perforated material NOTE 1 The performance efficiency is expressed as a percentage. NOTE 2 The higher the perforation efficiency, the easier the sheet separation. 3.3 tie bar uncut zone in the p
38、erforation line 4 Principle A perforated test piece of tissue paper or tissue product, of given dimensions, is stretched to break in the machine direction at a constant rate of elongation using a tensile-testing apparatus that measures and records the tensile force as a function of the elongation of
39、 the test piece. From the recorded data, the tensile strength is calculated. In order to determine the perforation efficiency, measurements are performed both on perforated and non-perforated tissue products. 5 Apparatus 5.1 Tensile-testing apparatus The tensile-testing apparatus shall be in accorda
40、nce with ISO 1924-2. It is capable of stretching a test piece of tissue paper or tissue product of given dimensions, at a constant rate of elongation of (50 2) mm/min, and recording the tensile force as a function of elongation. The force-measuring system shall measure loads with an accuracy of 1 %
41、of the reading or 0,05 N, whichever is the greater. It shall be calibrated and verified in accordance with the requirements of ISO 7500-1. 5.2 Tensile-tester clamps The tensile-testing apparatus shall have two clamps of at least 50 mm in width. Each clamp shall be designed to grip the test piece fir
42、mly, but without damage, along a straight line across the full width of the test piece (the clamping line) and shall have a means for adjusting the clamping force. The clamps should preferably grip the test piece between a cylindrical and a flat surface, with the plane of the test piece tangential t
43、o the cylindrical surface. Other types of clamps may be used if it can be ensured that the test piece does not slip or suffer any damage during the test. BS EN ISO 12625-12:2010ISO 12625-12:2010(E) ISO 2010 All rights reserved 3During the test, the clamping lines shall be parallel to each other. The
44、y shall also be perpendicular to the direction of the applied tensile force and to the long dimension of the test piece. The distance between the clamping lines (the test span length) shall be (100 1) mm. In cases where the distance between perforations on the finished products is less than 100 mm a
45、nd it is not possible to obtain a test piece of 150 mm in length (as required in 8.1) containing only one perforation line, a test span length of (50 1) mm shall be used. This deviation from the specified procedure shall be recorded in the test report. 5.3 Cutting device The cutting device shall mee
46、t the requirements of ISO 536 and shall produce test pieces (50,0 0,5) mm wide, with undamaged, straight, smooth and parallel edges. 6 Sampling If the tests are being made to evaluate a lot, the sample shall be selected in accordance with ISO 186. If the tests are being made on another type of sampl
47、e, make sure the specimens taken are representative of the sample received. 7 Conditioning Condition the samples according to ISO 187, unless otherwise agreed between the parties concerned, and keep them in the standard atmosphere throughout the test. 8 Preparation of test pieces 8.1 Dimensions 8.1.
48、1 Non-perforated test pieces Non-perforated test pieces shall be (50 0,5) mm in width and at least 150 mm in length, excluding perforations and faults. With the exception of tissue paper or tissue products having an embossed pattern, the test pieces shall be free of creases, kinks, wrinkles, folds o
49、r other thickness variations. Test pieces shall be cut with their length in the machine direction. 8.1.2 Perforated test pieces Each perforated test piece shall be (50 0,5) mm in width and at least 150 mm in length, excluding faults. With the exception of tissue paper or tissue products having an embossed pattern, the test pieces shall be free of creases, kinks, wrinkles, folds or other thickness variations. Test pieces shall be cut with their length in the machine direction. Perforation line
