1、June 2017 English price group 11No part of this translation 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 85.060!%g%/“2680212www.din.deDIN IS
2、O 16260Paper and board Determination of internal bond strength (ISO 16260:2016),English translation of DIN ISO 16260:2017-06Papier und Pappe Bestimmung der Spaltfestigkeit (ISO 16260:2016),Englische bersetzung von DIN ISO 16260:2017-06Papier et carton Dtermination de la force de cohsion interne (ISO
3、 16260:2016),Traduction anglaise de DIN ISO 16260:2017-06www.beuth.deDocument comprises 20 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.06.17 A comma is used as the decimal marker. Content Page Foreword .4Introduction .51 Sc
4、ope . 62 Normative references 63 Terms and definitions . 64 Principle 75 Apparatus and technical data . 75.1 Apparatus 75.2 Technical data 85.2.1 Instrument/pendulum ranges . 85.2.2 Aluminium platen/anvil 85.2.3 Pendulum . 85.2.4 Adhesive tape 95.2.5 Test piece 96 Sampling .117 Conditioning .118 Pre
5、paration of test assemblies .119 Calibration .1110 Procedure1111 Expression of results .1212 Test report 12Annex A (normative) Maintenance and calibration 14Annex B (informative) Precision 16Annex C (informative) Verification of device compliance with a standard .18Bibliography .20DIN ISO 16260:2017
6、-06 2National foreword 3This document (ISO 16260:2016) has been prepared by Technical Committee ISO/TC 6/SC 2 “Test methods and quality specifications for paper and board” (Secretariat: SIS, Sweden). The International Standard ISO 16260:2016, Paper and board Determination of internal bond strength,
7、has been adopted in this standard without any modification. The responsible German body involved in its preparation was DIN-Normenausschuss Papier, Pappe und Faserstoff (DIN Standards Committee Paper, Board and Pulps), Working Committee NA 074-02-03 AA “Physical-technological test methods for paper
8、and board”. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 186 DIN EN ISO 186 ISO 187 DIN EN 20187 ISO 4287 DIN EN ISO 4287 ISO 4288 DIN EN ISO 4288 ISO 5725-1 DIN ISO 5725-1 ISO 15754 DIN ISO 15754 National Annex NA (informative) Bibl
9、iography DIN EN 20187, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples DIN EN ISO 186, Paper and board Sampling to determine average quality DIN EN ISO 4287, Geometrical Product Specifications (GPS) Surfa
10、ce texture: Profile method Terms, definitions and surface texture parameters DIN EN ISO 4288, Geometrical Product Specifications (GPS) Surface texture: Profile method Rules and procedures for the assessment of surface texture DIN ISO 5725-1, Accuracy (trueness and precision) of measurement methods a
11、nd results Part 1: General principles and definitions DIN ISO 15754, Paper and board Determination of z-directional tensile strength DIN ISO 16260:2017-06 3National forewordForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO me
12、mber 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. International organizations, governme
13、ntal 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 those intended for its further maintenance
14、 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 (see www.iso.org/directives).Attention i
15、s 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 document will be in the Introduction and/o
16、r 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 expressions related to conformity asse
17、ssment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 6, Paper, board and pulps, Subcommittee SC 2, Test methods and quality s
18、pecifications for paper and board.This corrected version of ISO 16260:2016 replaces the entire text of the erroneously published version dated 2015-06-01.DIN ISO 16260:2017-06 4 IntroductionPaper and board sheets may, during printing, conversion or specific product applications, be subjected to impu
19、lses, impacts or shock loads of sufficient magnitude to cause structural failure. Commonly observed in-plane structural failures include surface picking, blistering and interior delimitation.This International Standard describes one method for determining the internal bond strength of a product of p
20、ulp, paper or board. There are other published methods48for determining “Z” or thickness direction tensile strength, but in this method, the delaminating force is applied at a rate very much higher than in other methods. This method may, therefore, be preferred for predicting sheet performance under
21、 printing or converting conditions.DIN ISO 16260:2017-06 5 1 ScopeThis International Standard describes a method to measure the energy required to rapidly delaminate a test piece of paper or board. Rupture of the test piece in the “Z” or thickness direction is initiated by a pendulum having a define
22、d mass, moving at a defined velocity.The procedure is suitable for both single- and multi-ply papers and boards, including coated sheets and those that are laminated with synthetic polymer films. It is particularly suitable for papers and boards that may be subjected to z-direction48rapid impacts, i
23、mpulses or shock loads during printing or conversion.The test procedure entails the adherence of double-sided adhesive tape to both sides of the test piece under pressure. For this reason, the method may be unsuitable for materials that might be structurally damaged by compression or are porous enou
24、gh to permit migration of the tape adhesive into or through the test piece.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated refe
25、rences, the latest edition of the referenced document (including any amendments) applies.ISO 186, Paper and board Sampling to determine average qualityISO 187, Paper, board and pulps Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samp
26、lesEN 755-2:2013, Aluminium and aluminium alloys Extruded rod/bar, tube and profiles Part 2: Mechanical properties3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1internal bond strengthaverage potential energy, expressed as J/m2of surface, requir
27、ed to delaminate a test piece under the conditions of the testNote 1 to entry: The result is the difference of the potential energy before and the remaining energy after delaminating the test piece.3.2test assemblytest piece, laminated between two pieces of double-sided adhesive tape, with the botto
28、m side of the lower tape adhered to a rigid metal anvil and the upper side of the upper tape adhered to an “L”-shaped aluminium platenDIN ISO 16260:2017-06 6 4 PrincipleA square test piece is adhered to a flat metal anvil by means of double-sided adhesive tape. An “L”-shaped aluminium platen with th
29、e same surface area as the test piece is then adhered to the upper surface of the test piece, again, using double-sided adhesive tape. The assembly is shown in Figure 1. The assembly is secured in position and a pendulum allowed to impact the upper inside surface of the platen, causing it to rotate
30、about its outside corner, splitting the test piece in the “Z” or thickness direction (see Figure 2). The energy absorbed in rupturing the test piece is calculated from the measurement of the subsequent over-swing of the pendulum and the known masses and dimensions of the system components.13Key1 tes
31、t piece2 double-sided adhesive tape3 aluminium platen4 metal anvilFigure 1 Components of a test assembly1Key1 pendulum strike point and directionFigure 2 Pendulum to anvil strike pointPrecision data are provided in Annex B.Verification of the measuring instrument compliance using an impact device is
32、 described in Annex C.5 Apparatus and technical data5.1 Apparatus5.1.1 Device for the preparation of the test assembly, with the dimensions 25,4 mm 0,2 mm 25,4 mm 0,2 mm for testing by pressing the components of the test assembly together at a controlled pressure for a controlled time. During the pr
33、essure cycle, the aluminium platen (5.1.4) should be securely clamped in position to prevent flexing.DIN ISO 16260:2017-06 7 NOTE Most commercially available preparation stations are capable of simultaneously preparing five test assemblies.Ensure that the test instrument is levelled in the frontback
34、 and leftright directions and the pendulum is horizontal when in the latched position.5.1.2 Pendulum, mounted on a pedestal by means of a horizontal spindle supported on low-friction bearings. The pendulum shall be free to rotate from a horizontal position through at least 180. At its free end, the
35、pendulum carries a metal striker ball which contacts the inside face of the aluminium platen on the test assembly when the pendulum reaches the vertical position. To minimize energy losses due to vibration, the centre of gravity of the pendulum should be at the point of impact of the striker ball wi
36、th the aluminium platen. There should be no looseness in the construction of pendulums that have augmented weight assemblies.5.1.3 A means for securing the pendulum in a horizontal position, with provision for a rapid, vibration-free release.5.1.4 Test assembly, is formed from a stationary anvil (ba
37、se) and a separable aluminium platen that is a right angle in cross section together with the test piece and adhesive tape (see Figure 1).Anvils intended for use in multiple test piece preparation stations should be indelibly marked to ensure that they are always placed in the same position in the p
38、reparation station. The test assembly is securely held in position so that the pendulum strikes the centre of percussion of the aluminium platen when the axis of rotation is at the outside corner of the right angle of the platen (see Figure 2).5.1.5 A means of registering the peak angular swing of t
39、he pendulum after impact with the test assembly.5.1.6 A means to convert the peak angular swing of the pendulum to an internal bond strength value. Commonly employed methods include optical encoder computer and mechanical scale/friction pointer.5.1.7 An optional means to extend the range of the inst
40、rument. This may be achieved by fitting pendulums of different masses, or by adding augmenting weights to the pendulum, or reducing the surface area of the test piece by an amount not exceeding 50 %. The user of this International Standard should consult the manufacturer of the test instrument regar
41、ding the installation and verification of such options. Any such modifications to the instrument shall be included in the test report.5.1.8 Device suitable for cutting strips of the test material 25,4 mm 0,2 mm (5.2.5) wide and of sufficient length to mount in the test assembly preparation device.5.
42、1.9 Knife or multi-blade cutting device, for separating test assemblies prepared in a multi-station test assembly preparation device.5.1.10 Double-sided adhesive paper tape, with a creped release liner (see 5.2.4).5.1.11 Solvent, suitable for removing adhesive residue from the anvils and aluminium p
43、latens.DIN ISO 16260:2017-06 8 5.2 Technical data5.2.1 Instrument/pendulum rangesTable 1 Instrument and pendulum rangesRange 0 Range 1 SB lowRange 2 SB highRange 3Measuring range (J/m2) (recommendation, otherwise, manufacturers instructions)50 to 400 100 to 600 200 to 1 200 300 to 2 400Corresponds t
44、o Scott-Bond (SB) scale. Low-range0 to 525High-range210 to 1 050Pendulum length, L, (mm), to 0,2 mm 228,6 228,6 228,6 228,6Reduced pendulum lengtha, Lred, (mm) 130 to 140 145 to 170 170 to 190 180 to 200Mass of pendulum 4 g 133 190 380 760Tolerance range potential energyaPotential Energy (Nm) calcul
45、ated from m g h0,29 to 0,31 0,41 to 0,44 0,84 to 0,88 1,60 to 1,72aThe decisive factor is the potential energy that is stored in the pendulum at the start of the test. Once the pendulum is released, the potential energy is converted into kinetic energy as the pendulum impacts the aluminium platen. T
46、he determination of the reduced pendulum length serves as a fast check-up of the devices condition. A more accurate examination is possible by applying the method described in 5.2.3 (reduced pendulum length, Lred).5.2.2 Aluminium platen/anvilAluminium platen:Alloy EN AW 6060 T66 (AlMgSi0,5 F 22) acc
47、ording to EN 755-2:2013, Table 38.Devices where the alloy, used for the platen, cannot be identified, only original aluminium platen shall be used.NOTE “Newer” devices have a marking on the platen that identifies the alloy used. This is not the case for “old” devices.Compensation: The scales of the
48、Scott-Bond devices contain a compensation that takes account of the original alloy of the platen. If the alloy is changed, the compensation used may not be appropriate and this would lead to erroneous values being obtained. This correction factor is not applicable for digital devices.Surface: Surface roughness: Rz 3,8 m12Mass of an aluminium platen
