1、BRITISH STANDARD Classification of thermosetting wood adhesives for non-st ruct ur al applications The European Standard EN 127652001 has the status of a British Standard ICs 83.180 BS EN 12765:2001 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Copyright European Committee f
2、or Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12765:2001 Amd. No. National foreword Date Comments This British Standard is the official English language version of EN 12765:2001. The UK participation
3、in its preparation was entrusted to Technical Committee PRY52, Adhesives, which has the responsibility to: - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor
4、 related international and European developments and promulgate them in the UK. - A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this docum
5、ent may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of Br
6、itish Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the au
7、thority of the Standards Committee and comes into effect on 15 August 2001 O BSI 07-2001 Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates
8、when the document was last issued. Amendments issued since publication I I ISBN O 580 38093 9 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-EUROPEAN STANDARD NORME EUROPENNE EU
9、ROPISCHE NORM O EN 12765 May 2001 English version Classification of thermosetting wood adhesives for non-structural applications Classification des colles bois rsine thermodurcissable usages non structuraux Klassifizierung von duroplastischen Holzklebstoffen fr nichttragende Anwendungen This Europea
10、n Standard was approved by CEN on 16 April 2001. CEN members are bound to comply with the CENKENELEC 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 concern
11、ing such national standards may be obtained on application to the 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 lang
12、uage and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Sw
13、itzerland and United Kingdom. EUROPEAN COMMIITEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMITE EUROPEEN DE NORMALISATION Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.
14、Ref. No. EN 12765:2001 E Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 2 EN 127652001 Contents Page Foreword 3 Introduction . 4 Scope 5 Normative references 5 Terms and de
15、finitions . 5 Classification . 5 Test method . 6 Requirements . 6 Bibliography 8 O Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 3 EN 12765:2001 Foreword This European Sta
16、ndard 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 the latest by November 2001, and conflicting nat
17、ional standards shall be withdrawn at the latest by November 2001. This standard includes a Bibliography. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic,
18、 Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permit
19、ted without license from IHS-,-,-Page 4 EN 127652001 Introduction 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 guaran
20、teed by the adhesive manufacturer. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 5 EN 12765:2001 O 1 Scope This European Standard classifies thermosetting resin based wood
21、 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 standard, could
22、be applicable. The adhesives described in this standard are suitable for the bonding of furniture and interior structures, panelling, doors, windows, stairs etc made of wood or derived timber products. NOTE Thermosetting resin is defined in EN 923 as: monomer, polymer or copolymer, which when cured,
23、 changes into a substantially infusible and insoluble product. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed here
24、after. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). O EN 205 Tes
25、t methods for 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 of this European standard the terms and definitions given in EN 923 and the following terms and defin
26、itions apply. 3.1 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 accordance with Table 1, which gives examples of climatic conditions and fields of application in
27、which the bonded member is to be used. The classification shall be based on tests on thin bond- lines except when gap-filling properties are claimed, in which case it shall be based on tests using both thin and thick bond-lines as defined in EN 205. Copyright European Committee for Standardization P
28、rovided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 6 EN 12765:2001 Durability classes c1 c2 c3 c4 Table 1 - Description of durability classes Examples of climatic conditions and fields of application Interior, in which the moi
29、sture content of the wood does not exceed 15 %. 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 %. Interior with frequent short-term exposure to running or condensed water and/o
30、r to heavy exposure to high humidity. Exterior not exposed to weather. 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 and as
31、follows: a) either thin, or both thin and thick bond-lines shall be tested as appropriate (see clause 4); b) the tests shall be performed using the appropriate conditioning sequence given in Table 2; c) the individual values and the mean value for 10 valid test pieces for each conditioning sequence
32、test shall be recorded. The standard atmosphere used as a control climate is either (2OI2)“C and (65*5)% relative humidity (rh), (20/65), or (23I2)“C and (50I5)% relative humidity (rh),(23/50). 6 Requirements When tested in accordance with EN 205, the mean strength of an adhesive shall: a) for thin
33、bond-lines conform to the values shown in Table 2; b) for thick bond-lines, when required, be not lower than 80 % of the values shown in Table 2; NOTE The values given in Table 2 are comparative values and should not be used as a basis for calculation, e.g. of design data. They are not comparable wi
34、th values obtained using test pieces of other dimensions. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 7 EN 127652001 Table 2- Minimum values of adhesive strength for thi
35、n bond lines Adhesive strength in N/mmz Conditioning sequences Durability classes Clj C2j C4j C3j Serial number 1 Duration and condition 7days“ in standard atmosphere2) - rl o 21 o 21 o 21 o 2 7 days in standard atmosphere 1 day in water at (2OI5)“C 27 27 27 3 7 days in standard atmosphere 3 h in wa
36、ter at (67f2)“C 2 h in water at (20f5)“C 24 4 7 days in standard atmosphere 3 h in boiling water 2 h in water at (20f5)“C 24 NOTE 1 A longer conditioning time between gluing and testing might be necessary as ad glue manufacturer. sed by the NOTE 2 The number used in the designation does not indicate
37、 ranking order. A given adhesive can be assigned to more than one durability class. “ 1 day = 24 hours 2, (2W2)“C and (65f5)% relative humidity or (23f2)“C and (50I5)% relative humidity - = No test required 3, All minimum values indicated in the columns of durability classes C1 to C4 shall be reache
38、d as mean values for the classification of an adhesive (for example for C4 the conditioning sequences are 1,2 and 4). Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Page 8 EN 12
39、7652001 Bibliography EN 204:2001 Classification of thermoplastic wood adhesives for non-structural applications Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12765:2001 B
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