1、April 2012 Translation by DIN-Sprachendienst.English price group 9No 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 9
2、7.150!$C=“1883226www.din.deDDIN EN ISO 23999Resilient floor coverings Determination of dimensional stability and curling after exposure to heat(ISO 23999:2008)English translation of DIN EN ISO 23999:2012-04Elastische Bodenbelge Bestimmung der Manderung und Schsselung nach Wrmeeinwirkung(ISO 23999:20
3、08)Englische bersetzung von DIN EN ISO 23999:2012-04Revtements de sol rsilients Dtermination de la stabilit dimensionnelle et de lincurvation aprs exposition lachaleur (ISO 23999:2008)Traduction anglaise de DIN EN ISO 23999:2012-04SupersedesDIN EN 434:1994-11www.beuth.deDocument comprises pagesIn ca
4、se of doubt, the German-language original shall be considered authoritative.1303.12 DIN EN ISO 23999:2012-04 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 219 “Floor coverings” of the International Organization for Standardiz
5、ation (ISO) and has been taken over as EN ISO 23999:2012 by Technical Committee CEN/TC 134 “Resilient, textile and laminate floor coverings”, (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Kunststoffe (Plastics Standards Committee)
6、, Working Committee NA 054-04-05 AA Bodenbelge. Amendments This standard differs from DIN EN 434:1994-11 as follows: a) Clause 3 “Principle” has been editorially revised; b) the test apparatus used is represented graphically; c) Clause 7 “Test procedure” has been modified; d) Clause 10 “Test report”
7、 has been revised. Previous editions DIN 51962: 1971-08, 1977-05 DIN EN 434: 1994-11 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 23999 February 2012 ICS 97.150 Supersedes EN 434:1994English Version Resilient floor coverings - Determination of dimensional stability and curling after expo
8、sure to heat (ISO 23999:2008) Revtements de sol rsilients - Dtermination de la stabilit dimensionnelle et de lincurvation aprs exposition la chaleur (ISO 23999:2008) Elastische Bodenbelge - Bestimmung der Manderung und Schsselung nach Wrmeeinwirkung This European Standard was approved by CEN on 31 D
9、ecember 2011. 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 alteration. Up-to-date lists and bibliographical references concerning such national standards may be
10、 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 made by translation under the responsibility of a CEN member into its own language and notified to t
11、he 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, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxemb
12、ourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN A
13、ll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 23999:2012: E(ISO 23999:2008) Contents EN ISO 23999:2012 (E) DIN EN ISO 23999:2012-04 2 Contents PageForeword 3 1 Scope 4 2 Terms and definitions .4 3 Principle 4 3.1 Dimensional stabi
14、lity .4 3.2 Curling 4 4 Apparatus .5 5 Test specimens 7 6 Conditioning .7 7 Test procedure .7 7.1 Test specimen preparation .7 7.2 Initial measurement .8 7.2.1 Curling 8 7.2.2 Linear dimensions .8 7.3 Heat exposure 8 7.4 Reconditioning .9 7.5 Final measurement 9 7.5.1 Curling 9 7.5.2 Linear dimensio
15、ns .9 8 Calculation and expression of results .9 8.1 Curling 9 8.2 Dimensional stability .9 9 Precision .10 10 Test report 10 Bibliography 11 Foreword The text of ISO 23999:2008 has been prepared by Technical Committee ISO/TC 219 “Floor coverings” of the International Organization for Standardizatio
16、n (ISO) and has been taken over as EN ISO 23999:2012 by Technical Committee CEN/TC 134 “Resilient, textile and laminate floor coverings” the secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by
17、endorsement, at the latest by August 2012, and conflicting national standards shall be withdrawn at the latest by August 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for id
18、entifying any or all such patent rights. This document supersedes EN 434:1994. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic
19、, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 23999:2008 h
20、as been approved by CEN as a EN ISO 23999:2012 without any modification. EN ISO 23999:2012 (E) DIN EN ISO 23999:2012-04 3 1 Scope This International Standard specifies a method for determining dimensional stability and curling of resilient floor coverings, in the form of sheets and tiles, in linear
21、dimensions after exposure to heat. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 dimensional stability ability of a resilient floor covering to retain its original dimensions after exposure to heat, under specified conditions 2.2 curling ve
22、rtical deformation appearing on the specimen after exposure to a heat treatment, under specified conditions 2.3 domed reverse curl when centered, area of specimen that does not lie flat against support plate 3 Principle 3.1 Dimensional stability The relative change in distance between marks or a spe
23、cific location on a test specimen is measured before and after exposure to a heat treatment, under specified conditions. In the case of tiles, measurements may be made using a block and dial gauge assembly and marking of the test specimen is not necessarily required. 3.2 Curling The vertical deforma
24、tions are measured in the test specimen after the specified heat treatment. Test specimens are placed in an oven at an elevated temperature, after which curl and dimensional stability are determined. In the case of domed material, turn the test specimen over to measure inverted or with the back of t
25、he sample facing up. Measure curl and mark appropriately as negative curl. EN ISO 23999:2012 (E) DIN EN ISO 23999:2012-04 4 4 Apparatus 4.1 Oven, thermostatically controlled and ventilated, capable of being maintained at a uniform temperature of 80 2 C. In operation, ensure that radiation from the h
26、eating element does not directly reach the test specimens or support plates. 4.2 Support plates, of solid metal, e.g. aluminium or stainless steel, of dimensions larger than the test specimen and not less than 1,5 mm in thickness. Ensure that the support plates are kept smooth and polished so that s
27、urface friction does not interfere with free shrinkage or growth of the test specimens. The plates shall be flat and free of convex or concave warp. The shapes and dimensions of the apparatus specified in 4.1 and 4.2 shall be such that: a) curling can be measured without removing the test specimens
28、from the support plates, except in the case of domed material; b) the clearance between the plates and the vertical walls of the oven is W 50 mm; c) the vertical clearance between the support plates and between the plates and the oven is W 100 mm. 4.3 Measuring device. 4.3.1 Measuring equipment (for
29、 sheet or tile test specimens): preferably an optical bench, for non-contact measurements. The equipment shall have a range of at least 200 mm and a precision of 0,02 mm. For many types of optical benches, take care that the test specimen is properly seated against the base horizontal index guide wh
30、en a specific measurement is being taken. Test specimens with concave or convex edges can be read incorrectly. 4.3.2 Micrometer (for sheet or tile test specimens), pillar-mounted, or other device accurate to at least 0,1 mm. 4.3.3 Rigid plate (for sheet or tile test specimens), of steel, squared and
31、 finished, of dimensions 240 mm 240 mm with holes for the scores (see Figure 1). 4.3.4 Square template (for sheet or tile test specimens), of side 610 mm or 508 mm or 305 mm or 229 mm. Dimensions in millimetres Figure 1 Rigid steel plate EN ISO 23999:2012 (E) DIN EN ISO 23999:2012-04 5 4.3.5 Block a
32、nd dial gauge (for tile test specimens only). See Figure 2. Dimensions in millimetres Key 1 edge 1 2 edge 2 3 edge 3 4 edge 4 A1template 610 mm 610 mm A2template 508 mm 508 mm A3template 305 mm 305 mm A4template 229 mm 229 mm aWithin 10 % of the corner of the tile edge. bWithin the central 10 % of t
33、he tile edge. cWithin 10 % of the corner of the tile edge. dWithin 10 % of the corner of the tile edge. Figure 2 Apparatus for measuring side length, straightness and squareness 4.4 Scoring device, e.g. a single edge razor blade, scalpel or scribe point. EN ISO 23999:2012 (E) DIN EN ISO 23999:2012-0
34、4 6 5 Test specimens For sheet material, before cutting the test specimens, lay out the product as flat as possible and mark the direction of manufacture. Cut out three (3), nominal 240 mm square test specimens, at equal distance, from the sample material (see Figure 3). The distance between the out
35、er edge of the sample and nearest edge of the test specimen shall be at least 100 mm. The test specimen edges shall be parallel/transverse to the direction of manufacture. For tiles, remove tiles from package, discard top and bottom tile, spread them out, then randomly select three test specimens. T
36、he direction of manufacture shall, if possible, be marked on each test specimen. Dimensions in millimetres Key b total width Figure 3 Cutting of test specimens 6 Conditioning Condition test specimens on a flat surface, such as a table surface, to ensure they will contact the support plate uniformly
37、during the measurements. Condition the test specimens at a temperature of 23 2 C and relative humidity of 50 5 % for a minimum of 24 h. 7 Test procedure 7.1 Test specimen preparation Make eight scores (4.4) on each sheet or tile test specimen approximately 20 mm from the edges. Make four scores in e
38、ach direction to form four crosses, at a distance of 200 1 mm (see Figure 4). Mark the two reference points for measurement on the top of the test specimen and measure, with the wear surface up, on the block and the optical bench assembly (4.3.1), to ensure that any embossing along the edge of the t
39、est specimen wear surface does not affect the measurements. To make the scores more easily visible, the scores may be marked with a solution of dye in aqueous alcohol (i.e. whiteboard marker or equivalent). Place each test specimen on a support plate (4.2) with its surface facing upward. Condition t
40、he test specimen (see Clause 6). EN ISO 23999:2012 (E) DIN EN ISO 23999:2012-04 7 Dimensions in millimetres Figure 4 Scoring of test specimens 7.2 Initial measurement 7.2.1 Curling Measure the vertical distance between the support plate (4.2) and the wear surface of the test specimen in four places
41、around the edge (usually the corners), where the distance is greatest. Carry out the measurements with the micrometer (4.3.2). CAUTION When handling test specimens and making measurements, to avoid distortion, do not apply undue force to the test specimen. 7.2.2 Linear dimensions On each test specim
42、en, determine the length of four measurement sections: two in the manufacturing direction (MD) of the flooring material; and two in the transverse or across-manufacturing (TD or AMD) direction. Put the rigid plate (4.3.3) on top of the test specimen and measure the length between the crosses formed
43、by the scores (see Figure 1). Start the heat exposure portion of the test within 1 h of making the initial dimensional measurements. 7.3 Heat exposure Place the test specimens horizontally on to support plates (4.2), previously placed in the oven (4.1), and allow to come to (80 2) C. Maintain the te
44、st specimens at this temperature for 1506h min+in the oven. EN ISO 23999:2012 (E) DIN EN ISO 23999:2012-04 8 7.4 Reconditioning Remove the test specimens from the oven. Allow the test specimens to recondition (see Clause 6) for 24 h (unless otherwise specified for the product). Do not remove the tes
45、t specimens from the metal plate until the reconditioning time has elapsed and the measurements are to be performed. 7.5 Final measurement After reconditioning, measure the dimensional changes to the test specimen. 7.5.1 Curling Re-measure curling as described in 7.2.1. Make sure that the optical de
46、vice (4.3.1) is at the same reference points for both the initial and final measurements. 7.5.2 Linear dimensions 7.5.2.1 For sheet and tile test specimens Make sure to place the rigid metal plate on top of the specimens and re-measure the length between the crosses formed by the scores, i.e. the ne
47、w distance of each measurement section (see Figure 1). Make sure that the optical device (4.3.1) is at the same reference points for both the initial and final measurements. 7.5.2.2 For tile test specimens measured using block and dial gauge Place the test specimen on the block and dial gauge (4.3.5
48、). Record the length at the specified location (see Figure 2). 8 Calculation and expression of results 8.1 Curling Calculate the mean value of the four differences for each test specimen and the mean value for the three test specimens. Express the results in millimetres to the nearest 0,5 mm. 8.2 Dimensional stability For each of the test directions, record the variations for the six length measurements (two readings from three test specimens). Calculate the dimensional change for each measuremen
