1、BSI Standards PublicationBS ISO 24334:2014Laminate floor coverings Determination of lockingstrength for mechanicallyassembled panelsBS ISO 24334:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 24334:2014. Itsupersedes BS ISO 24334:2006 which is withdrawn.T
2、he UK participation in its preparation was entrusted to TechnicalCommittee PRI/60, Resilient and Laminate Floor Coverings.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a con
3、tract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 85270 1ICS 97.150Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authori
4、ty of theStandards Policy and Strategy Committee on 30 November 2014.Amendments issued since publicationDate Text affectedBS ISO 24334:2014 ISO 2014Laminate floor coverings Determination of locking strength for mechanically assembled panelsRevtements de sol stratifis Dtermination de la rsistance la
5、traction des lames assembles mcaniquement INTERNATIONAL STANDARDISO24334Second edition2014-12-01Reference numberISO 24334:2014(E)BS ISO 24334:2014ISO 24334:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publ
6、ication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the coun
7、try of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 24334:2014ISO 24334:2014(E)Contents PageForeword iv1 Scope . 12 Normative references 13 Principle 14 Apparatus . 1
8、5 Sampling and conditioning of panels 26 Testing . 26.1 Cutting of the short panel sides 26.2 Cutting of the long panel sides 36.3 Assembling of test specimens 46.4 Tensile testing 67 Repetition testing 68 Expression of results 79 Test report . 7 ISO 2014 All rights reserved iiiBS ISO 24334:2014ISO
9、24334:2014(E)ForewordISO (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 interested in a subject f
10、or 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 Electrotechnical Commission (IEC) on
11、 all matters of electrotechnical standardization.The procedures used to develop this document and those 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.
12、 This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see 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 an
13、y or all such patent rights. Details of any patent rights identified during the development of the document 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 u
14、sers and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplemen
15、tary informationThe committee responsible for this document is ISO/TC 219, Floor coverings.This second edition cancels and replaces the first edition (ISO 24334:2006), which has been technically revised.iv ISO 2014 All rights reservedBS ISO 24334:2014Laminate floor coverings Determination of locking
16、 strength for mechanically assembled panels1 ScopeThis International Standard specifies a method for the determination of the locking strength of joints between laminate floor covering panels which are assembled with both vertical and horizontal mechanical locking systems.2 Normative referencesThe f
17、ollowing 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 references, the latest edition of the referenced document (including any amendments) applies.ISO 7500-1, M
18、etallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system3 PrincipleMechanically assembled panels with mechanical locking systems are pulled apart to an opening of 0,20 mm or until the lo
19、ck breaks.4 ApparatusThe following set of equipment is needed:4.1 Tensile testing machine, verified and calibrated in accordance with ISO 7500-1 and conforming to class 3 for the force range which is applied for the locking strength measurement.4.2 External extensometer or optical measurement system
20、, with an accuracy of 0,01 mm.4.3 Two clamping devices, attached to the tensile testing machine to hold the grippers.NOTE Zwick/Roell clamps Type 83551), 20 kN are found suitable for the purpose.4.4 Two grippers, 50 mm 210 mm, attached to the clamping devices to hold the specimen with an anti-slip c
21、oating material (see Figure 6 and Figure 7).4.5 Sliding calliper, with an accuracy of 0,1 mm, to determine the length, width, and thickness of the specimen.4.6 Saw, for cutting the specimen.4.7 Balance, with an accuracy of 0,1 g.1) Zwick/Roell clamps Type 8355 are examples of suitable products avail
22、able commercially. This information is given for the convenience of users of this document and does not constitute an endorsement by ISO of these products. Equivalent products may be used if they can be shown to lead to the same results.INTERNATIONAL STANDARD ISO 24334:2014(E) ISO 2014 All rights re
23、served 1BS ISO 24334:2014ISO 24334:2014(E)4.8 Calibration plate, iron steel 200 mm 200 mm, (7 1) mm thick, to adjust the clamping device coplanar in the tensile testing machine.5 Sampling and conditioning of panelsSample five panels, preferably from the same package, for the preparation of five test
24、 specimens for the short side locks and five for the long side locks. If panel dimensions allow it, the sampling of the short side and the long side can come from the same panel.The panels from which the test specimens are cut shall be conditioned to a constant mass at (50 5) % relative humidity (RH
25、) and (23 2) C.Constant mass is considered to be reached when the results of two successive weighing operations, carried out at an interval of 24 h, do not differ more than 0,1 % of the mass of the panels.6 Testing6.1 Cutting of the short panel sidesCut two specimens, A1 and B1, from each panel. The
26、 length of the specimen shall be a minimum of 110 mm (to fit the machine).If the width of the panel is equal to or less than 210 mm, but more than 100 mm, the actual width shall be used in the specimen (see Figure 1).If the width of the panel is less than 100 mm, the long-side profiles of two panels
27、 shall be glued together. The new actual width shall be used in the specimen (see Figure 2).If the width of the panel is more than 210 mm, the specimen shall be cut down to a width of 200 10 mm (see Figure 3).Dimensions in millimetresKeyl surface dimension, length of panelw surface dimension, width
28、of panelA1, B1 test specimensFigure 1 Cutting of panels for short side testing (w 100 mm and 210 mm)Dimensions in millimetresKeyl surface dimension, length of panel2 ISO 2014 All rights reservedBS ISO 24334:2014ISO 24334:2014(E)w surface dimension, width of panelA1, B1 test specimensFigure 2 Cutting
29、 of panels for short side testing (w 210 mm)6.2 Cutting of the long panel sidesCut two test specimens, A2 and B2, from each panel. The length of the specimen shall be (200 10) mm and the width shall be a minimum of 110 mm (to fit the machine).If the width of the panel is more than or equal to 110 mm
30、, the specimen shall be cut from the centre line of the panel (see Figure 4).If the width of the panel is less than 110 mm, the long-side profiles of two panels shall be glued together and the specimen should be cut from the centre line of the panel (see Figure 5).Dimensions in millimetresKeyl surfa
31、ce dimension, length of panelw Surface dimension, width of panelC-C centre line of the panelA2, B2 test specimensFigure 4 Cutting of panels for long side testing (w 110 mm) ISO 2014 All rights reserved 3BS ISO 24334:2014ISO 24334:2014(E)Dimensions in millimetresKeyl surface dimension, length of pane
32、lw Surface dimension, width of panelC-C centre line of the panelA2, B2 test specimensFigure 5 Cutting of panels for long side testing (w 110 mm)6.3 Assembling of test specimens6.3.1 Assembling of short side specimensMeasure the width of A1 and B1 to the nearest millimetre and their thickness to the
33、nearest 0,1 mm.As shown in Figure 1, Figure 2, and Figure 3, connect the short side lock from A1 and B1 according to the fitting instruction from the manufacturer.4 ISO 2014 All rights reservedBS ISO 24334:2014ISO 24334:2014(E)Dimensions in millimetresKeyF1 attachment area 1 for the first gripperF2
34、attachment area 2 for the second gripperA1, B1 test specimensFigure 6 Assembled test piece for short side testing6.3.2 Assembling of long side specimensMeasuring of A2 and B2 to the nearest millimetre and their thickness to the nearest 0,1 mm.As shown in Figure 4 and Figure 5 connect the long side l
35、ock from A2 and B2 according to the fitting instructions from the manufacturer.Dimensions in millimetresKeyF1 attachment area 1 for the first gripperF2 attachment area 2 for the second gripperA2, B2 test specimensFigure 7 Assembled test piece for long side testing ISO 2014 All rights reserved 5BS IS
36、O 24334:2014ISO 24334:2014(E)6.4 Tensile testing6.4.1 GeneralThe test atmosphere shall be (50 5) % RH and (23 2) C unless the test is completed within 60 min of removal of the test specimens from the conditioning atmosphere.The pulling direction shall be perpendicular to the lock in a coplanar direc
37、tion of the specimen.6.4.2 PreparationThe coplanar guiding of the clamping devices shall be adjusted with the calibration plate.Assemble the grippers in the clamping devices. Fix the calibration plate in the gripper of the upper clamping device and adjust the lower clamping device with the help of t
38、he calibration plate to the upper clamping device.6.4.3 Procedure6.4.3.1 Short side testingFor the short side testing, first, attach the clamp to A1 (in attachment area F1). When attaching the clamp to B1 (attachment area F2), ensure that there is no added stretch or pull. Therefore, the tensile tes
39、ting machine shall have zero-force adjustment control software installed to avoid the additional force resulting from clamping the specimen.If the width of the specimen is smaller than 210 mm, attach the specimen in the vertical centre line of the gripper perpendicular to the attachment areas, no mo
40、re than 200 mm apart.Adjust the external extensometer (or optical measurement) in the vertical centre line of the test specimen as close as possible to the joint.Operate the testing machine, employing a 10 N pre-tension, then pull the test specimens apart at a speed of 0,5 mm/min.Record the force (i
41、n Newton), F0,2, required to reach an opening of 0,20 mm.Record the force (in Newton), Fmax, required for reaching the joint breaking point, as well as the opening between the separated elements, s, at joint break. Measure s to the nearest 0,01 mm.Perform the test on five specimens, made from five d
42、ifferent panels.Calculate the average value of the five measurements of F0,2, Fmax, and s respectively. Check their validity according to Clause 7.6.4.3.2 Long side testingFor the long side testing, use the same procedure as the short side testing, but with the samples A2 and B2.7 Repetition testing
43、For the three parameters (Fmax, F0,2, and s), each result shall not differ more than 20 % (tolerance of repetition) from the average value of the five results in order to be valid.If only one of the five results in a test series is outside the tolerance of repetition, either for Fmax, F0,2, or for s
44、, one new test specimen shall be prepared and tested. If the result of this single test is within the tolerance of repetition, this result shall replace the earlier result that was outside the tolerance of repetition. If not, five completely new tests shall be carried out and checked for validity in
45、 the same way as the first series.6 ISO 2014 All rights reservedBS ISO 24334:2014ISO 24334:2014(E)If two or more of the five results in a test series are outside the tolerance of repetition, either for Fmax, F0,2, or s, five completely new tests shall be carried out and checked for validity in the s
46、ame way as the first series.The new results shall be checked for validity in the same way as the first ones. The procedure shall be repeated until five test specimens give valid results. If more than three complete test series are needed to achieve results within the tolerance of repetition, the tes
47、t shall be interrupted and considered not possible to finish.8 Expression of resultsFor F0,2and Fmax, the average values shall be divided by the average measured width of the clamped side of the test specimen. The results, which are designated f0,2and fmaxrespectively, are expressed in kilo-Newton p
48、er metre (kN/m). fmaxis the locking strength for the assembled panels.f0,2, fmax, and s shall be stated separately for the long sides and for the short sides of the panels.If s is equal or less than 0,2 mm, the relevant locking strength for f0,2is fmax.All reported values shall be according to the r
49、egistration from the external extensometer.9 Test reportThe test report shall contain at least the following information:a) name of the product;b) indication of the sample;c) reference to this International Standard, i.e. ISO 24334;d) f0,2in kN/m, to the nearest 0,1 kN/m, for the long sides and for the short sides;e) the locking strength, fmax, in kN/m, to the nearest 0,1 kN/m, for the long sides and for the short sides;f) the average opening s in mm, to the nearest 0,01 mm, for the lon
