1、BS EN 204:2016Classification of thermoplasticwood adhesives for non-structural applicationsBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 204:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 204:2016. Itsupersedes BS E
2、N 204:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/52, Adhesives.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a c
3、ontract. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 89029 1ICS 83.180Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the autho
4、rity of theStandards Policy and Strategy Committee on 31 August 2016.Amendments issued since publicationDate Text affectedBS EN 204:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 204 August 2016 ICS 83.180 Supersedes EN 204:2001English Version Classification of thermoplastic wood adhesives
5、 for non-structural applications Classification des colles thermoplastiques pour bois usages non structuraux Klassifizierung von thermoplastischen Holzklebstoffen fr nichttragende Anwendungen This European Standard was approved by CEN on 8 July 2016. CEN members are bound to comply with the CEN/CENE
6、LEC 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 application to the CEN-CENELEC Management Centre o
7、r 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 Management Centre has the same status as the off
8、icial 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, Latvia, Lithuania, Luxembourg, Malta, Netherlands
9、, 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 Marnix 17, B-1000 Brussels 2016 CEN All rights of
10、 exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 204:2016 EBS EN 204:2016EN 204:2016 (E) 2 Contents Page European foreword . 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Classification . 5 5 Test method 6 6 Requi
11、rements . 6 Bibliography 8 BS EN 204:2016EN 204:2016 (E) 3 European foreword This document (EN 204:2016) 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 publ
12、ication of an identical text or by endorsement, at 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
13、 held responsible for identifying any or all such patent rights. This document supersedes EN 204:2001. Compared to EN 204:2001 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 informati
14、on on conditioning sequences added in Table 2. 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, For
15、mer 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. BS EN 204:2016EN 204:2016 (E) 4 Introduc
16、tion European Standards giving a common 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. BS EN 204:2016EN 204:2016
17、(E) 5 1 Scope This European Standard classifies thermoplastic resin based wood adhesives for non-structural applications into durability classes D1 to D4 based on the dry and wet strengths of bond-lines measured under specified conditions after various conditioning treatments. For special applicatio
18、ns, further tests that do not fall within the scope of this European 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. This E
19、uropean Standard does not specify the temperature resistance of bond-lines. 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 re
20、ferences, the latest edition of the referenced document (including any amendments) applies. EN 205:2016, Adhesives Wood adhesives for non-structural applications Determination of tensile shear strength of lap joints EN 923, Adhesives - Terms and definitions 3 Terms and definitions For the purposes o
21、f this document, the terms and definitions given in EN 923 and the following apply. 3.1 thermoplastic resin thermoplast polymer or copolymer capable of being softened by heating and hardened by cooling SOURCE: EN 923:2015, modified NOTE 1 to entry has been removed 3.2 thermoplastic wood adhesive adh
22、esive whose main constituent is a thermoplastic resin and which has been formulated for bonding wood 4 Classification An adhesive shall be classified in accordance with Table 1, which gives examples of climatic conditions and fields of application in which the bonded member is to be used. The classi
23、fication shall be based on tests on thin bond-lines as defined in EN 205:2016. BS EN 204:2016EN 204:2016 (E) 6 Table 1 Description of durability classes Durability class Examples of climatic conditions and fields of application D1 Interior, in which the moisture content of the wood does not exceed 1
24、5 % D2 Interior with occasional short-term exposure to running or condensed water and/or to occasional high humidity provided the moisture content of the wood does not exceed 18 % D3 Interior with frequent short-term exposure to running or condensed water and/or to heavy exposure to high humidity. E
25、xterior not exposed to weather D4 Interior with frequent long-term exposure to running or condensed water. Exterior exposed to weather but with protection 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 t
26、ested according to their assigned durability class (see Table 1); b) the tests shall be performed using the appropriate conditioning sequence given 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
27、be recorded. Results from tests in which failure occurred in the wood at values below the specified minimum are invalid. Test pieces that are twisted, bended or showing other irregularities in form are valid if they reach the requirements; otherwise, or if visual examination shows that the adhesive
28、was not correctly applied, the results are invalid. All results, valid or invalid, shall be reported. Explanation of the invalid values shall be 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) % relat
29、ive humidity (RH), (23/50). 6 Requirements When tested in accordance with EN 205:2016 the mean strength of an adhesive shall conform to the values shown in Table 2. BS EN 204:2016EN 204:2016 (E) 7 Table 2 Minimum values of adhesives strength for thin bond-lines Conditioning sequences Adhesive streng
30、th in N/mm2Durability classes Sequence number Duration and condition D1cD2cD3cD4c1 7 daysain standard atmosphereb 10 10 10 10 2 7 days in standard atmosphere 3 h in water at (20 5) C 7 days in standard atmosphere 8 3 7 days in standard atmosphere 4 days in water at (20 5) C 2 4 4 7 days in standard
31、atmosphere 4 days in water at (20 5) C 7 days in standard atmosphere 8 5 7 days in standard atmosphere 6 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 immediately (not gradually). For the conditioning sequences 3 and 5 th
32、e 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 gluing and testing might be necessary as advised by the adhesive manufactu
33、rer. 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) % relative humidity. cAll minimum values indicated in the columns of dura
34、bility classes D1 to D4 shall be reached as mean values for the classification of an adhesive (for example for D4, the conditioning sequences are 1, 3 and 5). = No test required. BS EN 204:2016EN 204:2016 (E) 8 Bibliography 1 EN 12765, Classification of thermosetting wood adhesives for non-structura
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