1、November 2016 English price group 7No 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 83.180!%Sw“2584884www.din.deDIN
2、EN 12765Classification of thermosetting wood adhesives for nonstructural applications;English version EN 12765:2016,English translation of DIN EN 12765:2016-11Klassifizierung von duromeren Holzklebstoffen fr nichttragende Anwendungen;Englische Fassung EN 12765:2016,Englische bersetzung von DIN EN 12
3、765:2016-11Classification des colles thermodurcissable pour bois usages non structuraux;Version anglaise EN 12765:2016,Traduction anglaise de DIN EN 12765:2016-11SupersedesDIN EN 12765:200109www.beuth.deDocument comprises 9 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-languag
4、e original shall be considered authoritative.10.16 DIN EN 12765:2016-11 2 A comma is used as the decimal marker. National foreword This document (EN 12765:2016) has been prepared by Technical Committee CEN/TC 193 “Adhesives” (Secretariat: AENOR, Spain). The responsible German body involved in its pr
5、eparation was DIN-Normenausschuss Holzwirtschaft und Mbel (DIN Standards Committee Timber and Furniture), Working Committee NA 042-04-05 AA Spiegelausschuss zu CEN/TC 193/SC 1 Holzklebung. Amendments This standard differs from DIN EN 12765:2001-09 as follows: a) the title of the standard has been mo
6、dified; b) in the German version, the term “duroplastisch has been replaced by “duromer”. The corresponding English term “thermosetting” has not been changed; c) references to tests with thick bond lines have been deleted; d) 20 test pieces are now to be used for evaluation; e) additional informatio
7、n regarding conditioning sequences has been included in Table 2. Previous editions DIN EN 12765: 2001-09 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12765 August 2016 ICS 83.180 Supersedes EN 12765:2001English Version Classification of thermosetting wood adhesives for non-structural applica
8、tions Classification des colles thermodurcissables pour bois usages non structuraux Klassifizierung von duromeren Holzklebstoffen fr nichttragende Anwendungen This European Standard was approved by CEN on 8 July 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which st
9、ipulate 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 application to the CEN-CENELEC Management Centre or to any CEN member. This Europea
10、n 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 Management Centre has the same status as the official versions. CEN members are t
11、he 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, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Roman
12、ia, 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 Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by
13、any means reserved worldwide for CEN national Members. Ref. No. EN 12765:2016 E2 Contents Page European foreword . 3 Introduction 4 1 Scope 4 2 Normative references 4 3 Terms and definitions . 4 4 Classification . 4 5 Test method 5 6 Requirements . 5 Bibliography 7 EN 12765:2016 (E) DIN EN 12765:201
14、6-11 3 European foreword This document (EN 12765:2016) has been prepared by Technical Committee CEN/TC 193 “Adhesives”, the secretariat of which is held by AENOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at
15、 the latest by February 2017, and conflicting national standards shall be withdrawn at the latest by February 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such
16、patent rights. This document supersedes EN 12765:2001. Compared to EN 12765:2001 the following modifications have been made: a) references to tests with thick bond lines have been removed; b) assessment is based on 20 test pieces; c) additional information on conditioning sequences added in Table 2.
17、 According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Ge
18、rmany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. EN 12765:2016 (E) DIN EN 12765:2016-11 4 Introduction European Standards giving a comm
19、on classification with respect to durability classes for wood adhesives will allow considerable improvement in consumer protection in any future product liability system with regard to properties guaranteed by the adhesive manufacturer. 1 Scope This European Standard classifies thermosetting resin b
20、ased wood adhesives for non-structural applications into durability classes C1 to C4 based on the dry and wet strengths of bond-lines measured under specified conditions after various conditioning treatments. For special applications, further tests, which do not fall within the scope of this Europea
21、n Standard can be applicable. The adhesives specified in this European Standard are suitable for the bonding of furniture and interior structures, panelling, doors, windows, stairs etc. made of wood or derived timber products. 2 Normative references The following documents, in whole or in part, are
22、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 205:2016, Adhesives Wood adhesives for non-structural
23、applications - Determination of tensile shear strength of lap joints EN 923, Adhesives - Terms and definitions 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 923 and the following apply. 3.1 thermosetting resin thermoset monomer, polymer or copolymer
24、, which when cured, changes into a substantially infusible and insoluble product SOURCE: EN 923:2015, 2.2.9 3.2 thermosetting wood adhesive adhesive whose main constituent is a thermosetting resin and which has been formulated for bonding wood 4 Classification An adhesive shall be classified in acco
25、rdance with Table 1, which gives examples of climatic conditions and fields of application in which the bonded member is to be used. The classification shall be based on tests on thin bond-lines as defined in EN 205:2016. EN 12765:2016 (E) DIN EN 12765:2016-11 5 Table 1 Description of durability cla
26、sses Durability class Examples of climatic conditions and fields of application C1 Interior, in which the moisture content of the wood does not exceed 15 % C2 Interior with occasional short-term exposure to running or condensed water and/or to occasional high humidity provided the moisture content o
27、f the wood does not exceed 18 % C3 Interior with frequent short-term exposure to running or condensed water and/or to heavy exposure to high humidity. Exterior not exposed to weather C4 Interior with frequent long-term exposure to running or condensed water. Exterior exposed to weather but with prot
28、ection by an adequate surface coating 5 Test method The adhesive shall be tested in accordance with EN 205:2016, and as follows: a) bond-lines shall be tested as according to their assigned durability class (see Table 1); b) the tests shall be performed using the appropriate conditioning sequence gi
29、ven in Table 2; c) the individual strength values in N/mm2rounded to 0,1 N/mm2and the mean value of the 20 test pieces for each conditioning sequence shall be recorded. Results from tests in which failure occurred in the wood at values below the specified minimum are invalid. Test pieces that are tw
30、isted, bended or showing other irregularities in form are valid if they reach the requirements; otherwise, or if visual examination shows that the adhesive was not correctly applied, the results are invalid. All results, valid or invalid, shall be reported. Explanation of the invalid values shall be
31、 reported; The standard atmosphere used as a control climate is either (20 2) C and (65 5) % relative humidity (RH), (20/65), or (23 2) C and (50 5) % relative humidity (RH), (23/50). 6 Requirements When tested in accordance with EN 205:2016, the mean strength of an adhesive shall conform to the val
32、ues shown in Table 2. EN 12765:2016 (E) DIN EN 12765:2016-11 6 Table 2 Minimum values of adhesive strength for thin bond lines Conditioning sequences Adhesive strength in N/mm2Durability classes Sequence number Duration and condition C1cC2cC3 cC4 c1 7 daysain standard atmosphereb 10 10 10 10 2 7 day
33、s in standard atmosphere 1 day in water at (20 5) C 7 7 7 3 7 days in standard atmosphere 3 h in water at (67 2) C 2 h in water at (20 5) C 4 4 7 days in standard atmosphere 3 h in boiling water 2 h in water at (20 5) C 4 In each conditioning sequence, specimens shall change from one step to another
34、 immediately (not gradually). For the conditioning sequences 2,3 and 4 the specimens shall be tested in wet state after removing them from water. NOTE 1 The seven days in standard atmosphere are included in the conditioning time mentioned EN 205:2016, 6.2. NOTE 2 A longer conditioning time between g
35、luing and testing might be necessary as advised by the adhesive manufacturer. NOTE 3 The number used in the designation does not indicate ranking order. A given adhesive can be assigned to more than one durability class. a1 day = 24 h. b(20 2) C and (65 5) % relative humidity or (23 2) C and (50 5)
36、% relative humidity. cAll minimum values indicated in the columns of durability classes C1 to C4 shall be reached as mean values for the classification of an adhesive (for example for C4 the conditioning sequences are 1, 2 and 4). = No test required. EN 12765:2016 (E) DIN EN 12765:2016-11 7 Bibliography 1 EN 204, Classification of thermoplastic wood adhesives for non-structural applications EN 12765:2016 (E) DIN EN 12765:2016-11
