1、 Reference number ISO 25620:2008(E) ISO 2008INTERNATIONAL STANDARD ISO 25620 First edition 2008-07-01 Laminate floor coverings Determination of long-side friction for mechanically assembled panels Revtements de sol stratifis Dtermination de la force de frottement latrale des panneaux assembls mcaniq
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7、All rights reserved iii Foreword 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 interested in
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11、not be held responsible for identifying any or all such patent rights. ISO 25620 was prepared by Technical Committee ISO/TC 219, Floor coverings. INTERNATIONAL STANDARD ISO 25620:2008(E) ISO 2008 All rights reserved 1 Laminate floor coverings Determination of long-side friction for mechanically asse
12、mbled panels 1 Scope This International Standard specifies a method for the determination of the long-side friction of joints between laminate floor panels which are held together on the floor by mechanical locking systems. 2 Normative references The following referenced documents are indispensable
13、for the application 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 7500-1:2004, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/
14、compression testing machines Verification and calibration of the force-measuring system 3 Principle The long-side friction of mechanically assembled panels is determined in a tensile test. During the test, a test specimen with long-side joints is moved through two outer mechanically assembled panel
15、parts. The maximum force determined is the parameter for the long-side friction. 4 Apparatus 4.1 Tensile testing machine, verified and calibrated in accordance with ISO 7500-1:2004, and conforming to class 3 for the force range which is applied by the locking strength measurement. 4.2 Measuring inst
16、rument (caliper gauge), to determine the length, width and thickness of the specimen. 4.3 Balance, which can be read to the nearest 0,1 g. 4.4 Supporting frames of steel, thickness W 6 mm, width W 25 mm, for a parallel tensile measurement of the friction of the long-side joints, assembled (see Figur
17、e 1) using a) 4 screws (e.g. M12), b) 8 washers, and c) 4 nuts. ISO 25620:2008(E) 2 ISO 2008 All rights reservedDimensions in millimetres 40 5 1 3 4 2Key 1 upper grip 2 lower grip 3 screws M12 4 parallel tension 5 washers Figure 1 Specimen position in tensile test 5 Sampling and conditioning of pane
18、ls Sample ten panels for the preparation of five specimens. Condition the panels from which the specimens are cut to constant mass at (50 5) % relative humidity and (23 2) C. Constant mass is considered to have been reached when the results of two successive weighing operations, carried out at an in
19、terval of 24 h, do not differ by more than 0,1 % of the mass of the panels. 6 Testing 6.1 Cutting and assembling of test specimens Assemble the test specimen from panel parts cut from the centre parts of two different panels (see Figure 2) and drill parallel holes for the screws on the 300 mm long p
20、anels. The position of the holes are indicated in Figure 1. The diameter of the holes shall be 0,2 mm greater than the outer diameter of the screws. Assemble the specimen along the long-side joints according to the instructions of the laminate producer, without pressure or tensile forces, on the pro
21、files. For testing, assemble the specimen with the supporting frames according to 4.4, with the use of washers on all four screws on both sides of the specimen to ensure that the centre part of the specimen is free from contact with the frame. ISO 25620:2008(E) ISO 2008 All rights reserved 3 The spe
22、cimen shall be flat and without torsion. The test shall be carried out using a cardanic suspension. For each product type, a minimum of five specimens shall be tested. Dimensions in millimetres 1 2 200 300Key 1 long-side joints 2 panel width Figure 2 Cutting of samples 6.2 Determination of the long-
23、side friction The pulling direction is parallel to the long-side joints. The suspension of the tensile testing machine (4.1) shall be assembled in the middle of the moved part of the specimen (i.e. the 200 mm-long part). The tensile speed shall be at 0,5 mm/min. Using the tensile testing machine, ca
24、rry out the test over a traversing distance of about 3 mm. 7 Expression of results The maximum force necessary to slide the panels within the assembly (adhesion sliding) to overcome friction is considered to be the long-side friction, F RL . (See Figure 3.) The standard deviation and the coefficient
25、 of variation of F RLshall be mentioned. ISO 25620:2008(E) 4 ISO 2008 All rights reservedKey l traversing distance, in millimetres (mm) F force, in newtons (N) Figure 3 Determination of the parameter long-side friction, F RL , by tensile test 8 Test report The test report shall include the following
26、 information: a) a reference to this International Standard (ISO 25620); b) any deviations from this International Standard; c) the name and address of the laboratory that performed the test; d) the name and address of the company requesting the test; e) the name and the type of laminate floor covering tested; f) the date of delivery of the test specimens; g) the test results according to Clause 7. ISO 25620:2008(E) ICS 97.150 Price based on 4 pages ISO 2008 All rights reserved
