1、February 2014 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).IC
2、S 97.140!%,B“2093157www.din.deDDIN EN 12721Furniture Assessment of surface resistance to wet heat;English version EN 12721:2009+A1:2013,English translation of DIN EN 12721:2014-02Mbel Bewertung der Bestndigkeit von Oberflchen gegen feuchte Hitze;Englische Fassung EN 12721:2009+A1:2013,Englische bers
3、etzung von DIN EN 12721:2014-02Ameublement valuation de la rsistance de la surface la chaleur humide;Version anglaise EN 12721:2009+A1:2013,Traduction anglaise de DIN EN 12721:2014-02SupersedesDIN EN 12721:2009-07www.beuth.deIn case of doubt, the German-language original shall be considered authorit
4、ative.Document comprises 14 pages 01.14 DIN EN 12721:2014-02 2 A comma is used as the decimal marker. National foreword This document (EN 12721:2009+A1:2013) has been prepared by Technical Committee CEN/TC 207 “Furniture”, (Secretariat: UNI, Italy). The responsible German body involved in its prepar
5、ation was the Normenausschuss Holzwirtschaft und Mbel (Timber and Furniture Standards Committee), Joint Working Committee NA 042-05-08 GA Gemeinschaftsarbeitsausschuss NHM/NAB: Anforderungen und Prfverfahren fr Mbeloberflchen, SpA CEN/TC 207/WG 7. Amendments This standard differs from DIN EN 12721:2
6、009-07 as follows: a) the former Annex A “Direct light source” and all references to Annex A have been deleted. Previous editions DIN 68861-8: 1985-04 DIN EN 12721: 1997-10, 2009-07 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12721:2009+A1 October 2013 ICS 97.140 Supersedes EN 12721:2009 En
7、glish Version Furniture - Assessment of surface resistance to wet heat Ameublement - valuation de la rsistance de la surface la chaleur humide Mbel - Bewertung der Bestndigkeit von Oberflchen gegen feuchte Hitze This European Standard was approved by CEN on 3 January 2009 and includes Amendment 1 ap
8、proved by CEN on 3 September 2013. 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 nati
9、onal standards may be 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 langu
10、age and notified to the 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece,
11、 Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, 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 CEN
12、-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12721:2009+A1:2013: E EN 12721:2009+A1:2013 (E) 2 Contents Page Foreword . 3 1 Scope 4 2 Normative references . 4 3
13、Terms and definitions 4 4 Principle 5 5 Apparatus and materials 5 5.1 Thermometer 5 5.2 Heat source 5 5.3 Oven 6 5.4 Cleaning cloth 6 5.5 White polyamide fibre cloth . 6 5.6 Deionized or distilled water . 6 5.7 Heat-insulating foam 6 5.8 Diffuse light source 6 6 Preparation and conditioning 7 6.1 Co
14、nditioning . 7 6.2 Test surface 7 7 Test procedure . 7 7.1 Testing 7 7.2 Test temperatures 8 8 Examination of the test panel 8 9 Assessment of results . 8 10 Test report 9 Annex A (informative) Significant technical changes in revised edition of this standard . 11 Bibliography 12 Tables Table 1 Desc
15、riptive numerical rating code 8 Figures Figure 1 Aluminium block used as heat source . 6 DIN EN 12721:2014-02 EN 12721:2009+A1:2013 (E) 3 Foreword This document (EN 12721:2009+A1:2013) has been prepared by Technical Committee CEN/TC 207 “Furniture”, the secretariat of which is held by UNI. This Euro
16、pean Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2014, and conflicting national standards shall be withdrawn at the latest by April 2014. Attention is drawn to the possibility that some of the element
17、s of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document includes Amendment 1 approved by CEN on 2013-09-03. This document supersedes !EN 12721:2009“. The start and finish of text introduced
18、or altered by amendment is indicated in the text by tags !“. Informative !Annex A“ provides details of significant technical changes between this European Standard and the previous edition. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following count
19、ries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Port
20、ugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DINEN 12721:2014-02EN 12721:2009+A1:2013 (E) 4 1 Scope This European standard specifies a method for the assessment of the resistance to wet heat of all rigid furniture surfaces regardless of materials. It
21、does not apply to leather and textile surfaces. The test is intended to be carried out on a part of the finished furniture, but can be carried out on test panels of the same material, finished in an identical manner to the finished product, and of a size sufficient to meet the requirements of the te
22、st. The test should be carried out on unused surfaces. !deleted text“ 2 Normative references !The 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 referen
23、ces, the latest edition of the referenced document (including any amendments) applies.“ EN ISO 4287:1998, Geometrical Product Specifications (GPS) Surface texture: Profile method Terms, definitions and surface texture parameters (ISO 4287:1997) EN ISO 4288:1997, Geometrical Product Specifications (G
24、PS) Surface texture: Profile method Rules and procedures for the assessment of surface texture (ISO 4288:1996) ISO 209:2007, Aluminium and aluminium alloys Chemical composition ISO 1770:1981, Solid-stem general purpose thermometers 3 Terms and definitions For the purposes of this document, the follo
25、wing terms and definitions apply. 3.1 test panel panel including the test surface NOTE It may be cut from a finished item of furniture or it may be a separate panel produced in the same manner as the finished item of furniture. 3.2 test surface part of the test panel 3.3 test area part of the test s
26、urface under the heat source (5.2) 3.4 roughness Ra arithmetic mean of the absolute values of the profile deviations from the mean line DINEN 12721:2014-02EN 12721:2009+A1:2013 (E) 5 4 Principle A standard aluminium alloy block at a specified test temperature is placed on a damp cloth in contact wit
27、h the test surface. After a specified test period, the block and damp cloth are removed and the test surface is left for 16 h to 24 h. Thereafter, the test surface is cleaned and examined for damages such as discolouration, change in gloss, change in colour, blistering and swelling. The test result
28、is stated in a numerical rating code. 5 Apparatus and materials 5.1 Thermometer As specified in ISO 1770:1981, capable of insertion to the bottom of the centre bore of the heat source (5.2) or other means of measuring the temperature of the heat source to an accuracy of 1 C. 5.2 Heat source A block
29、as shown in Figure 1 manufactured from aluminium alloy according to ISO 209:2007, Al Mg Si (alloy shall contain more than 94% aluminium). The roughness of bottom surface shall be (2 1) m, expressed as Ra, according to EN ISO 4287:1998 and EN ISO 4288:1997. NOTE Alloy 6060 and 64430 are suitable The
30、following tolerances are applicable: Lengths: 0,2 mm of the nominal length Angles: 2 of the nominal angle DIN EN 12721:2014-02 EN 12721:2009+A1:2013 (E) 6 Dimensions in millimetres Figure 1 Aluminium block used as heat source 5.3 Oven An oven which can heat the heat source to a temperature higher th
31、an the test temperature. 5.4 Cleaning cloth White soft absorbent cloth. 5.5 White polyamide fibre cloth A plain weave having approximately 40 threads/cm in both warp and weft direction, weighing approximately 50 g/m, and cut (120 3) mm square. 5.6 Deionized or distilled water 5.7 Heat-insulating foa
32、m A melamine foam, with the following characteristics: density between 8,5 kg/m3 and 11,5 kg/m3; heat conductivity, less than 0,035 W/mK. The foam shall withstand at a temperature higher than 200 C. 5.8 Diffuse light source Light source providing evenly diffused light, giving an illumination on the
33、test surface of (1200 400) lx. This may either be diffused daylight or be diffused artificial daylight. DIN EN 12721:2014-02 EN 12721:2009+A1:2013 (E) 7 NOTE The daylight should be unaffected by surrounding trees, etc. When artificial daylight is used it is recommended that it should have a correlat
34、ed colour temperature of (6500 50) K and an Ragreater than 92, by using a colour matching booth in accordance with EN ISO 3668:2001. 16 Preparation and conditioning 6.1 Conditioning Conditioning of test surface shall begin at least one week before testing and shall be carried out in air at a tempera
35、ture of (23 2) C and relative humidity of (50 5)%. The conditioning time shall be stated in the test report. 6.2 Test surface The test surface shall be substantially flat and with a size sufficient to meet the requirements of Clause 7. 7 Test procedure 7.1 Testing Immediately after conditioning, the
36、 test shall be carried out in a test atmosphere of (23 2) C. The test surface shall be placed horizontally. It shall accommodate the required number of tests, with at least 15 mm spacing between the perimeter of adjacent test surfaces, and between the perimeters of the test surfaces and the edges of
37、 the panel. Where tests are carried out simultaneously, the perimeters of the test surfaces shall be separated by a minimum of 50 mm. If there is any reason to suppose that the properties of the test surface may vary, two identical tests shall be carried out simultaneously. The test surface shall be
38、 lightly wiped with a cleaning cloth (5.4) before the testing. Using the oven (5.3), raise the temperature of the heat source to a temperature higher than the specified test temperature, and transfer it to the heat insulating foam (5.7). Place the thermometer (5.1) or other means of measuring temper
39、ature in the centre bore of the heat source (5.2). If the temperature is not higher than the specified test temperature, the heat source shall be placed again in the oven until achieving this higher temperature. Place the white polyamide fibre cloth (5.5) centrally on the test surface. Spread (2 0,2
40、) cm3of distilled or deionized water (5.6) uniformly over the whole area of the white polyamide fibre cloth. NOTE A graduated eye dropper is suitable for dispensing the distilled or deionised water. When the heat source reaches the specified test temperature with an accuracy of 1 C, immediately plac
41、e it on the centre of the white polyamide fibre cloth. After 20 min in this position, remove the block. Wipe the test surface dry with the cleaning cloth (5.4) when it has cooled. Record the position of each test surface and its temperature. Allow the test surface to stand undisturbed from 16 h to 2
42、4 h. Wipe each test surface with the cleaning cloth (5.4) and examine the test panel. DIN EN 12721:2014-02 EN 12721:2009+A1:2013(E)8 7.2 Test temperatures The test temperatures shall be stated in requirement specifications, selected from the following: 55 C 70 C 85 C 100 C 8 Examination of the test
43、panel Carefully examine the test surface using the light source (5.8), for damage, e. g. discoloration, change in gloss and colour, blistering, swelling and other defects. For this purpose illuminate the surface separately and examine from different angles, directions and planes, including angle com
44、binations such that the light is reflected from the test surface and towards the observers eye. Viewing distance shall be 0,25 m to 1,0 m. Changes caused by the test shall also be determined by touching the surface. 9 Assessment of results Rate the test surfaces by comparing the test area with the a
45、rea surrounding it according to Table 1: Table 1 Descriptive numerical rating code Numerical rating Description 5 No change test area indistinguishable from adjacent surrounding area 4 Minor change test area distinguishable from adjacent surrounding area, only when the light source is mirrored on th
46、e test surface and is reflected towards the observers eye, e. g. discoloration, change in gloss and colour no change in the surface structure, e.g. deformation, swelling, fibre raising, cracking, blistering 3 Moderate change test area distinguishable from adjacent surrounding area, visible in severa
47、l viewing directions, e. g. discoloration, change in gloss and colour no change in the surface structure, e.g. swelling, fibre raising, cracking, blistering 2 Significant change test area clearly distinguishable from adjacent surrounding area, visible in all viewing directions, e. g. discoloration,
48、change in gloss and colour, and / or structure of the surface slightly changed, e.g. swelling, fibre raising, cracking, blistering 1Strong change the structure of the surface being distinctly changed and / or discoloration, change in gloss and colour, and / or the surface material being totally or partially removed, and / or the polyamide fibre cloth adhering to the surface DINEN 12721:2014-02EN 12721:2009+A1:2013(E)9 Each test surface shall be rated by an experienced observ
