1、BSEN 12721:2009ICS 97.140NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDFurnitureAssessmentof surfaceresistancetowetheat+A1:2013National forewordThis British Standard is the UK implementation of EN 12721:2009+A1:2013. It supersedes BS EN 12721:2009 which is wit
2、hdrawn.The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by !“.The UK participation in its preparation was entrusted b
3、y Technical Committee FW/0, Furniture to Subcommittee FW/0/1, Common Test Methods for Furniture.A list of organizations represented on this subcommittee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are resp
4、onsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN 12721:2009+A1:2013This British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 31 March2009 The British StandardsInstitution 2013. Publi
5、shedby BSI Standards Limited2013Amendments/corrigenda issued since publicationDate Comments 31 December 2013 Implementation of CEN amendment A1:2013ISBN 978 0 580 82224 7EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12721:2009+A1 October 2013 ICS 97.140 English Version Furniture - Assessment
6、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 approved by CEN on 3 September 2013. CE
7、N 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 obtained on app
8、lication 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 the CEN-CENELEC M
9、anagement 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, Hungary, Iceland, Ireland, Italy, La
10、tvia, 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-CENELEC Management Centre: Avenue Ma
11、rnix 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 2 Foreword This document (EN 12721:2009+A1:2013) has been prepared by Technical Committee CEN/TC 207 “Furniture”, the secretariat o
12、f which is held by UNI. This European 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 pos
13、sibility 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 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 sta
14、rt and finish of text introduced 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 org
15、anizations of the following countries 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,
16、Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12721:2009+A1:2013 EN 12721:2009+A1:2013 (E)3 Contents Page 1 Scope 4 2 Normative references . 4 3 Terms and definitions 4 4 Principle 5 5 Apparatus and materials 5 5.
17、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 Conditioning . 7 6.2 Test surface 7 7 Test procedure . 7 7.1 Testing 7
18、 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 Descriptive numerical rating code 8 Figures Figure 1 Aluminium block use
19、d as heat source . 6 BS EN 12721:2009+A1:2013 EN 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 does not apply to leather and textile surfaces. The test is intended
20、 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 test. The test should be carried out on unused surfaces. !deleted text
21、“ 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 references, the latest edition of the referenced document (including any am
22、endments) 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 (GPS) Surface texture: Profile method Rules and procedures for the ass
23、essment 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 following terms and definitions apply. 3.1 test panel panel including the
24、 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 surface under the heat source (5.2) 3.4 roughness Ra arithmetic mean
25、of the absolute values of the profile deviations from the mean line BS EN 12721:2009+A1:2013 EN 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 with the test surface. After a specified test period, the block an
26、d 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 is stated in a numerical rating code. 5 Apparatus and materials
27、 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 as shown in Figure 1 manufactured from aluminium alloy accordin
28、g 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 following tolerances are applicable: Lengths: 0,2 mm of the nom
29、inal length Angles: 2 of the nominal angle BS EN 12721:2009+A1:2013 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 than the test temperature. 5.4 Cleaning cloth White soft absor
30、bent 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 foam A melamine foam, with the following characteristics: densi
31、ty 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 test surface of (1200 400) lx. This may either be diffused d
32、aylight or be diffused artificial daylight. BS EN 12721:2009+A1:2013 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 correlated colour temperature of (6500 50) K and an Ragreater tha
33、n 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 temperature of (23 2) C and relative humidity of (50 5)%. The co
34、nditioning 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 test shall be carried out in a test atmosphere of (23 2)
35、 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 the panel. Where tests are carried out simultaneously, t
36、he 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 lightly wiped with a cleaning cloth (5.4) before the tes
37、ting. 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 temperature in the centre bore of the heat source (5.2). If the
38、 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) cm3of distilled or deionized water (5.6) uniformly over
39、 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 place it on the centre of the white polyamide fibre cloth. Af
40、ter 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 24 h. Wipe each test surface with the cleaning cloth (5.4)
41、 and examine the test panel. BS EN 12721:2009+A1:2013 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 panel Carefully examine the test surface using the l
42、ight 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 combinations such that the light is reflected from the
43、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 area surrounding it according to Table 1: Table 1 Des
44、criptive 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 the test surface and is reflected towards the observer
45、s 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 several viewing directions, e. g. discoloration, change in
46、 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, change in gloss and colour, and / or structure of th
47、e 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
48、 adhering to the surface BS EN 12721:2009+A1:2013 EN 12721:2009+A1:2013 (E)9 Each test surface shall be rated by an experienced observer. In cases of doubt, three observers shall be required. All observers shall have good colour vision. In case of three observers, the reported rating for the test su
49、rface shall be the average to the nearest nominal value. Duplicate tests shall be assessed and reported separately. 10 Test report The test report shall include at least the following information: a) reference to this European Standard; b) description of the test panel (relevant data); c) the test temperature or temperatures; d) conditioning time; e) the assessment of each test surface in accordance with Clause 9; !deleted text“; f) if applicable, additional information regarding type of damage; g) any deviati
