1、February 2014 Translation by DIN-Sprachendienst.English price group 10No 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).I
2、CS 97.140!%,BZ“2093155www.din.deDDIN EN 12720Furniture Assessment of surface resistance to cold liquids;English version EN 12720:2009+A1:2013,English translation of DIN EN 12720:2014-02Mbel Bewertung der Bestndigkeit von Oberflchen gegen kalte Flssigkeiten;Englische Fassung EN 12720:2009+A1:2013,Eng
3、lische bersetzung von DIN EN 12720:2014-02Ameublement valuation de la rsistance de la surface aux liquides froids;Version anglaise EN 12720:2009+A1:2013,Traduction anglaise de DIN EN 12720:2014-02SupersedesDIN EN 12720:2009-07www.beuth.deIn case of doubt, the German-language original shall be consid
4、ered authoritative.Document comprises 16 pages 01.14 DIN EN 12720:2014-02 2 A comma is used as the decimal marker. National foreword This document (EN 12720:2009+A1:2013) has been prepared by Technical Committee CEN/TC 207 “Furniture”, (Secretariat: UNI, Italy). The responsible German body involved
5、in its preparation 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 D
6、IN EN 12720:2009-07 as follows: a) the former Annex B “Direct light source” and all references to Annex B have been deleted. Previous editions DIN 68860: 1977-07 DIN 68861-1: 1978-06, 1981-12 DIN EN 12720: 1997-10, 2009-07 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12720:2009+A1 October 20
7、13 ICS 97.140 Supersedes EN 12720:2009 English Version Furniture - Assessment of surface resistance to cold liquids Ameublement - valuation de la rsistance de la surface aux liquides froids Mbel - Bewertung der Bestndigkeit von Oberflchen gegen kalte Flssigkeiten This European Standard was approved
8、by CEN on 3 January 2009 and includes Amendment 1 approved 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
9、 and bibliographical references concerning such national 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 t
10、he responsibility of a CEN member into its own language 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 Yugo
11、slav Republic of Macedonia, France, Germany, Greece, 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
12、 DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-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 12720:2009+A1:2013: E EN 12720:2009+A1:2013 (E) 2 Contents Page
13、Foreword . 3 1 Scope 4 2 Normative references . 4 3 Terms and definitions 4 4 Principle 5 5 Apparatus and materials 5 5.1 Discs . 5 5.2 Glass Petri dish 5 5.3 Tweezers . 5 5.4 Absorbent paper or tissue . 5 5.5 Cleaning cloth 5 5.6 Diffuse light source 5 5.7 Test liquid . 5 5.8 Deionized or distilled
14、 water . 5 5.9 Cleansing solution . 5 5.10 Cleansing agent . 5 6 Preparation and conditioning 6 6.1 Conditioning . 6 6.2 Test surface 6 7 Test procedure . 6 7.1 Testing 6 7.2 Test periods 7 8 Examination of the test panel 7 9 Assessment of results . 8 10 Test report 8 Annex A (normative) Liquids for
15、 testing surface 10 A.1 General . 10 A.2 Liquids 10 Annex B (informative) Significant technical changes in revised edition of this standard . 13 Bibliography 14 Tables Table 1 Test periods . 7 Table 2 Descriptive numerical rating code 8 Table A.1 Liquids 10 !deleted text“ DINEN 12720:2014-02EN 12720
16、:2009+A1:2013 (E) 3 Foreword This document (EN 12720:2009+A1:2013) has been prepared by Technical Committee CEN/TC 207 “Furniture”, the secretariat of 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 endor
17、sement, 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 elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifyi
18、ng any or all such patent rights. This document includes Amendment 1 approved by CEN on 2013-09-03. This document supersedes !EN 12720:2009“. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Informative !Annex B“ provides details of significant tec
19、hnical changes between this European Standard and the previous edition. 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, Cyprus, Czech Republic, Denmark, Eston
20、ia, Finland, Former Yugoslav Republic of Macedonia, 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. DIN EN 12720:2014-02 EN
21、12720:2009+A1:2013 (E) 4 1 Scope This European standard specifies a method for the assessment of the resistance to cold liquids of all rigid furniture surfaces regardless of materials. It does not apply to leather and textile surfaces. The test is intended to be carried out on a part of the finished
22、 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 shall be carried out on unused surfaces. The type and number of test liquids (Annex A) and the test
23、 periods (Table 1) shall be stated in requirement specifications or shall be agreed upon between purchaser and supplier or interested parties. Annex A (normative) includes a selection of suitable test liquids. Other liquids can be used if required. !deleted text“ 2 Normative references !The followin
24、g 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 amendments) applies.“ EN ISO 105 E04:199
25、6, Textiles Tests for colour fastness Part E04: Colour fastness to perspiration (ISO 105-E04:1994) ISO 1065:1991, Non-ionic surface-active agents obtained from ethylene oxide and mixed non-ionic surface-active agents Determination of cloud point 3 Terms and definitions For the purposes of this docum
26、ent, the following 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
27、 of the test surface under the glass Petri dish (5.2) DIN EN 12720:2014-02 EN 12720:2009+A1:2013(E)5 4 Principle Discs saturated with the test liquids are placed on the test surface and covered by a glass Petri dish. After a specified test period, the discs are removed and the test surface is left f
28、or 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 5.1 Discs Discs with a diameter of (25 2) mm, of soft
29、filter paper with a grammage of 400 g/m to 500 g/m, without colouring agent and glue. 5.2 Glass Petri dish Glass Petri dish with ground edges and without lips, external diameter (40 2) mm, and height (25 2) mm. 5.3 Tweezers 5.4 Absorbent paper or tissue 5.5 Cleaning cloth White soft absorbent cloth.
30、 5.6 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 daylight or be diffused artificial daylight. NOTE The daylight should be unaffected by surrounding trees, etc. When artificial daylight is u
31、sed it is recommended that it should have a correlated colour temperature of (6500 50) K and an Ragreater than 92, by using a colour matching booth in accordance with EN ISO 3668:2001.15.7 Test liquid Examples of the test liquids are given in Annex A (normative). 5.8 Deionized or distilled water 5.9
32、 Cleansing solution Solution containing 15 ml/l of the cleansing agent (5.10) in water (5.8). The solution shall be discarded after one day. 5.10 Cleansing agent Cleansing agent of the following composition: a) 12,5% (m/m) of a sodium primary C10 to C14polymer alkyl aryl sulphonate, DINEN 12720:2014
33、-02EN 12720:2009+A1:2013 (E) 6 b) 12,5% (m/m) polyethoxylated derivatives of primary or secondary C8 to C16alcohols with 5 to 15 ethoxylated groups having a cloud point of 25 C to 75 C in 1% (m/m) aqueous solution (determination of cloud point is described in ISO 1065:1991), c) 5,0% (m/m) ethanol, d
34、) 70% (m/m) water (5.8). The cleansing agent shall be stored in a glass bottle in a cool dark place and shall be used within one year of the day of preparation. 6 Preparation and conditioning 6.1 Conditioning Conditioning of test surface shall begin at least one week before testing and shall be carr
35、ied out in air at a temperature 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 of a size sufficient to meet the requirements of Clause 7 regarding the separation of the discs (
36、5.1). 7 Test procedure 7.1 Testing Immediately after conditioning, the test shall be carried out in a test atmosphere of (23 2) C. The test surface shall be placed horizontally. It shall be tested with the chosen test liquids at points which shall be not less than 60 mm apart, from centre to centre,
37、 and if possible, with centres not less than 40 mm from any edge of the test surface. If there is any reason to suppose that the properties of the test surface may vary, two tests shall be carried out. The test surface shall be lightly wiped with a cleaning cloth (5.5) before testing. Use clean twee
38、zers for each type of liquid. Immerse a disc (5.1) into the test liquid (5.7) between 30 s and 60 s, lift with the tweezers (5.3) and quickly wipe off the edge of the disc once against the edge of the vessel. Quickly place it on the test surface and immediately cover with an inverted glass Petri dis
39、h (5.2). The filter paper shall not be in contact with the edge of the glass Petri dish. Record the position of each test liquid. After the test period, remove the glass Petri dish and lift off the disc with the tweezers. Do not remove fibres of paper adhering to the test surface. Soak up any remain
40、ing test liquid with the absorbent paper (5.4) without rubbing and leave the test surface undisturbed for 16 h to 24 h in the test atmosphere without covering it. The test surface shall be sufficiently protected against dust without limiting in any way the free access of air. After the above 16 h to
41、 24 h, wash the test surface by lightly rubbing it with the cleaning cloth (5.5) soaked first in cleansing solution (5.9) and then only water (5.8). Finally wipe the surface lightly with a dry cleaning cloth (5.5). DINEN 12720:2014-02EN 12720:2009+A1:2013 (E) 7 Leave the test surface undisturbed, wi
42、thout covering it, for 30 min in the test atmosphere. 7.2 Test periods Test periods shall be selected from the Table 1. The periods have been chosen to simulate the range of times that may elapse before a liquid, applied to the surface of furniture, would be removed. Table 1 Test periods Period Exam
43、ples under consideration 10 s Immediate removal 2 min Quick removal 10 min After a short time 1 h After a meal or similar 6 h After work or other activity 16 h As soon as possible next day 24 h After one day 7 days After one week 28 days Long-term action 8 Examination of the test panel Carefully exa
44、mine the test surface using the light source (5.6), for changes caused by the test liquids, 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
45、angle combinations such that the light is reflected from the test surface and towards the observers eye. The viewing distance shall be 0,25 m to 1,0 m. Changes caused by the test liquids shall also be determined by touching the surface. DIN EN 12720:2014-02 EN 12720:2009+A1:2013 (E) 8 9 Assessment o
46、f results Rate the test surfaces by comparing the test area with the area surrounding it for each liquid according to Table 2: Table 2 Descriptive numerical rating code Numerical rating Description 5 No change test area indistinguishable from adjacent surrounding area 4 Minor change test area distin
47、guishable from adjacent surrounding area, only when the light source is mirrored on the 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. swelling, fibre raising, cracking, blistering 3 Moderate change te
48、st area distinguishable from adjacent surrounding area, visible in several 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, change in gloss and colour, and / or structure of the surface slightly changed, e.g. swelling, fibre raising, cracking, bli
