1、BS EN ISO 12625-4:2016Tissue paper and tissueproductsPart 4: Determination of tensile strength,stretch at maximum force and tensileenergy absorption (ISO 12625-4:2016)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 12625-4:2016 BRITISH STANDARDNational fore
2、wordThis British Standard is the UK implementation of EN ISO 12625-4:2016. It supersedes BS EN ISO 12625-4:2005 which iswithdrawn.The UK participation in its preparation was entrusted to Technical Committee PAI/11, Methods of test for paper, board and pulps.A list of organizations represented on thi
3、s committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 90263 5 ICS
4、 85.080.20 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STA
5、NDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12625-4 December 2016 ICS 85.060 Supersedes EN ISO 12625-4:2005English Version Tissue paper and tissue products - Part 4: Determination of tensile strength, stretch at maximum force and tensile energy absorption (ISO 12625-4:2016) Papier tissue et produit
6、s tissue - Partie 4: Dtermination de la rsistance la rupture par traction, de lallongement la force maximale et de labsorption dnergie la rupture par traction (ISO 12625-4:2016) Tissue-Papier und Tissue-Produkte - Teil 4: Bestimmung der breitenbezogenen Bruchkraft, der Dehnung bei maximaler Kraft un
7、d des Arbeitsaufnahmevermgens (ISO 12625-4:2016) This European Standard was approved by CEN on 21 November 2016. 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 al
8、teration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language m
9、ade by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Est
10、onia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STAN
11、DARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 12625-4:2016 EBS EN ISO 12625-4:201
12、6EN ISO 12625-4:2016 (E) 3 European foreword This document (EN ISO 12625-4:2016) has been prepared by Technical Committee ISO/TC 6 “Paper, board and pulps“ in collaboration with Technical Committee CEN/TC 172 “Pulp, paper and board” the secretariat of which is held by DIN. This European Standard sha
13、ll be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2017, and conflicting national standards shall be withdrawn at the latest by June 2017. Attention is drawn to the possibility that some of the elements of this document
14、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 12625-4:2005. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bo
15、und to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portug
16、al, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 12625-4:2016 has been approved by CEN as EN ISO 12625-4:2016 without any modification. BS EN ISO 12625-4:2016ISO 12625-4:2016(E)Foreword iv1 Scope . 12 Normative references
17、13 Terms and definitions . 14 Principle 25 Apparatus . 26 Conditioning 37 Preparation of test pieces . 37.1 General . 37.2 Dimensions . 37.3 Number of test pieces . 48 Procedure. 49 Calculation 49.1 General . 49.2 Tensile strength 49.3 Tensile index . 59.4 Stretch at maximum force . 59.5 Tensile ene
18、rgy absorption . 59.6 Tensile energy absorption index . 610 Test report . 6Annex A (informative) Precision . 7Bibliography 9 ISO 2016 All rights reserved iiiContents PageBS EN ISO 12625-4:2016ISO 12625-4:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federatio
19、n 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.
20、 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.The procedures used to develop this document and thos
21、e intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (s
22、ee www.iso.org/directives).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. Details of any patent rights identified during the development of the docu
23、ment will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and
24、expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by the European Committee Standardizatio
25、n (CEN) Technical Committee CEN/TC 172, Pulp, paper and board, in collaboration with ISO Technical Committee 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 cooperation between ISO and CEN (Vi
26、enna Agreement).This second edition cancels and replaces the first edition (ISO 12625-4:2005), which has been technically revised with the following changes:a) “stretch at break” was replaced by “stretch at maximum force”;b) in Clause 7, a more detailed description of the preparation of the test pie
27、ces was included;c) the number of test pieces required has been clarified with more detailed information;d) in Clause 8, the procedure for the measurement was clarified;e) in Clause 10, additional information is to be included in the test report;f) this document has been editorially updated.A list o
28、f all parts in the ISO 12625 series can be found on the ISO website.iv ISO 2016 All rights reservedBS EN ISO 12625-4:2016INTERNATIONAL STANDARD ISO 12625-4:2016(E)Tissue paper and tissue products Part 4: Determination of tensile strength, stretch at maximum force and tensile energy absorption1 Scope
29、This document specifies a test method for the determination of the tensile strength, stretch at maximum force and tensile energy absorption of tissue paper and tissue products. It uses a tensile-testing apparatus operating with a constant rate of elongation.It also specifies the method of calculatin
30、g the tensile index and the tensile energy absorption index.In cases where impurities and contraries have to be determined, ISO 157556applies for these detections in tissue paper and tissue products.2 Normative referencesThe following documents are referred to in the text in such a way that some or
31、all of their content constitutes requirements of this document. For dated 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 qualityISO 187, Paper,
32、 board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samplesISO 1924-2, Paper and board Determination of tensile properties Part 2: Constant rate of elongation method (20 mm/min)ISO 7500-1, Metallic materials Calibration an
33、d verification of static uniaxial testing machines Part 1: Tension/compression testing machines Calibration and verification of the force-measuring system3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 12625-1 and the following apply.ISO and IEC maint
34、ain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at http:/www.iso.org/obp3.1tensile strengthmaximum tensile force per unit width that a test piece will withstand befo
35、re breaking in a tensile test3.2tensile indextensile strength (3.1) divided by grammage ISO 2016 All rights reserved 1BS EN ISO 12625-4:2016ISO 12625-4:2016(E)3.3stretch at maximum forceratio of the elongation of a test piece, over its initial length, at the moment when the maximum tensile force is
36、reached during a tensile testNote 1 to entry: Stretch at maximum force is expressed as a percentage of the initial length.3.4tensile energy absorptionTEAamount of energy absorbed per unit surface area of a test piece while being stretched, until the onset of break (the moment of maximum tensile forc
37、e) in a tensile testSOURCE: ISO 12625-1:2011, 4.593.5tensile energy absorption indextensile energy absorption (3.5) divided by grammageSOURCE: ISO 1924-2:2008, 3.74 PrincipleA test piece of tissue paper or tissue product, of given dimensions, is stretched to break at a constant rate of elongation us
38、ing a tensile-testing apparatus that measures and records the tensile force as a function of the elongation of the test piece.From the recorded data, the tensile strength, the corresponding stretch at maximum force and the tensile energy absorption can be calculated.The test can be carried out by a
39、vertical or a horizontal tensile strength tester. Precision data are available in Annex A.5 Apparatus5.1 Tensile-testing apparatus5.1.1 GeneralThe tensile-testing apparatus shall be in accordance with ISO 1924-2. It is capable of stretching a test piece of tissue paper or tissue product of given dim
40、ensions, at a constant rate of elongation of (50 2) mm/min, and recording the tensile force as a function of elongation on a strip chart recorder or any equivalent device.The elongation shall be recorded to an accuracy of 0,1 mm. The measurement of the elongation shall start at a tension of (5 1) N/
41、m.The force-measuring system shall measure loads with an accuracy of 1 % of the reading or 0,1 N, whichever is greater, and shall be calibrated and verified to conform to the requirements of ISO 7500-1.5.1.2 Means for measuring the area of the force-elongation curveThe tensile-testing apparatus shal
42、l provide a means for measuring the area between the force-elongation curve and the elongation axis to an accuracy of 2 % of the true value as determined by numerical integration of the raw data.NOTE Most modern tensile testers are equipped with an electronic or electro-mechanical integrator that ca
43、n be used for this purpose. The area can also be determined from a graphical output of the data on chart paper using a planimeter.2 ISO 2016 All rights reservedBS EN ISO 12625-4:2016ISO 12625-4:2016(E)5.1.3 ClampsThe tensile-testing apparatus shall have two clamps of at least 50 mm in width. Each cl
44、amp shall be designed to grip the test piece firmly along a straight line across the full width of the test piece, without causing any damage, and shall have means for adjusting the clamping force.The clamps should preferably grip the test piece between a cylindrical and a flat surface, with the pla
45、ne of the test piece tangential to 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.During the test, the clamping lines shall be parallel to each other within an angle of 1. The clamping lines shall
46、 be perpendicular to the direction of the applied tensile force and to the longest dimension of the test piece to the same level of accuracy.The distance between the clamping lines (i.e. the test span length) shall be adjusted to (100 1) mm, except that a test span length of (50 1) mm shall be used
47、for finished paper products of which one or both of the dimensions is insufficient to provide a test piece of the length required in 7.2.NOTE Toilet tissue sheets having one or both dimensions of about 98 mm are an example of such a material.5.2 Cutting deviceThe cutting device shall be capable of r
48、epeatedly cutting test pieces (50,0 0,5) mm wide, with undamaged, straight, smooth and parallel edges.6 ConditioningCondition the samples according to ISO 187 and keep them in the standard atmosphere throughout the test.Conditioning shall be done prior to the preparation of test pieces.7 Preparation
49、 of test pieces7.1 General7.1.1 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 sample, make sure that the specimens taken are representative of the sample. Each test piece shall be free from perforations and faults not normally inherent in the tissue.7.1.2 For converted tissue products, testing shall be done on the product as received, regardless of the number of plies which are supplied as a product unit. Gener
