1、Resilient and laminate floor coverings Determination of indentation and residual indentation Part 2: Short-term residual indentation of resilient floor covering Revtements de sol rsilients et stratifis Dtermination du poinonnement et du poinonnement rmanent Partie 2: Poinonnement rmanent de courte d
2、ure des revtements de sol rsilients ISO 2011 Reference number ISO 24343-2:2011(E) First edition 2011-08-15 ISO 24343-2 INTERNATIONAL STANDARDISO 24343-2:2011(E)COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or util
3、ized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax
4、+ 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2011 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 Standard
5、s 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, governmental and non-governmental, in liaison with ISO, also take
6、part in the work. ISO collaborates closely with the International Electrotechnical 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 t
7、o prepare International Standards. Draft International Standards adopted by the 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
8、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. ISO 24343-2 was prepared by Technical Committee ISO/TC 219, Floor coverings. ISO 24343 consists of the following parts, under the general t
9、itle Resilient and laminate floor coverings Determination of indentation and residual indentation: Part 1: Residual indentation Part 2: Short-term residual indentation of resilient floor covering Part 3: Indentation of resilient semi-flexible/vinyl composition tiles ISO 24343-2:2011(E) ISO 2011 All
10、rights reserved iiiINTERNATIONAL STANDARD ISO 24343-2:2011(E) Resilient and laminate floor coverings Determination of indentation and residual indentation Part 2: Short-term residual indentation of resilient floor covering 1 Scope This part of ISO 24343 describes a method for determining the short-t
11、erm indentation and residual indentation produced in a resilient floor covering after the application and removal of a constant load. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 indentation difference between the initial thickness and the
12、 thickness measured after removal of the load 2.2 residual indentation difference between the initial thickness and the thickness measured after removal of the load and a specified recovery period 2.3 thickness distance between two parallel plates where the floor covering is inserted under a specifi
13、c load 3 Principle A test piece is subjected to a static loading, the thickness being measured before loading, after removal of the load and after a specified recovery period. 4 Apparatus 4.1 Indenter, a straight, steel cylinder of diameter as specified below with a hemispherical foot. Diameter of t
14、he indenter: (19,05 0,01) mm; weight of the indenter: (0,45 0,05) kg. 4.2 Rigid, horizontal platform, of minimum diameter 35 mm. 4.3 Device, by means of which a force of 22,7 kg can be smoothly applied. The frame shall not deform by more than 0,05 mm measured in the direction of the axis under the m
15、aximum force. 4.4 Comparator, for measuring the depth of indentation to 0,025 mm. 4.5 Apparatus for measuring the thickness of the test piece to 0,01 mm. Diameter of the flat foot: (3,50 0,02) mm ; mass applied (0,085 0,003) kg. ISO 2011 All rights reserved 14.6 Stopwatch. Key 1 horizontal platform
16、2 test piece 3 annula weight 4 lever arm 5 comparator 6 dead weight 7 indenter Figure 1 Example of a device to apply force on an indenter 5 Atmosphere for conditioning and testing Condition the test piece at a temperature of (23 2) C and a relative humidity of (50 5) % for a minimum of 24 h. Maintai
17、n these conditions when carrying out the test. 6 Sampling and selection of specimens Take a representative sample from the available material. Take three test pieces with dimensions at least 50 mm by 50 mm cut from a roll or different tiles or planks. 7 Test procedure 7.1 Mark the place of measureme
18、nt and measure the initial thickness of the test piece, t 0 , at its centre to 0,01 mm, using the appropriate mass specified in 4.5. 7.2 Zero comparator on base (horizontal platform). 7.3 Place the test piece on the platform. ISO 24343-2:2011(E)2 ISO 2011 All rights reserved7.4 Place the indenter on
19、 the marked spot and gently apply the total force specified in 4.3 and start the stopwatch within 2 s. 7.5 Record the depth of indentation after (15 1) s to 0,01 mm, t 1 . 7.6 Record the depth of indentation after (300 2) s to 0,01 mm, t 2 , and remove the force and the test piece from the platform.
20、 7.7 After a further (150 1) m, measure the final thickness of the test piece, t 3 , at the marked position, using the appropriate apparatus in 4.5. 7.8 Repeat the test on the remaining test pieces. Calculate the mean value from the measurements taken and express the result to 0,01 mm. 8 Calculation
21、 and expression of results Calculate the indentation at (15 1) s, t 0 t 1 , for each test piece. Calculate the indentation at (300 2) s, t 0 t 2 , for each test piece. Calculate the residual indentation, t 0 t 3 , for each test piece. 9 Precision statement A round robin test shall be conducted to de
22、termine the precision of this test method. 10 Test report The test report shall contain the following information: a) a statement that the tests were performed in accordance with this part of ISO 24343, i.e. ISO 24343-2; b) complete identification of the product tested, including type, source, colou
23、r, and manufacturers reference numbers; c) history of the sample; d) the mean value for the initial thickness to the nearest 0,02 mm; e) the mean value for the depth of indentation at 15 s to the nearest 0,02 mm; f) the mean value for the depth of indentation at 300 s to the nearest 0,02 mm; g) the
24、mean value for residual indentation at 150 m to the nearest 0,02 mm; h) any deviation from this part of ISO 24343, which could have affected the results. ISO 24343-2:2011(E) ISO 2011 All rights reserved 3Bibliography 1 ASTM F 1914, Standard Test Methods for Short-Term Indentation and Residual Indentation of Resilient Floor Covering 2 JIS A 1454, Test methods Resilient floorcoverings ISO 24343-2:2011(E)4 ISO 2011 All rights reservedISO 24343-2:2011(E) ICS 97.150 Price based on 4 pages ISO 2011 All rights reserved
