1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-626-23456-0 SANS 10183-3-2:2009Edition 1 EN 205:2003Edition 2SOUTH AFRICAN NATIONAL STANDARD Adhesives for wood Part 3-2:Non-structural applicat
4、ions Determination of tensile shear strength of lap joints This national standard is the identical implementation of EN 205:2003 and is adopted with the permission of CEN, rue de Stassart 36, B-1050 Brussels. Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria
5、 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 10183-3-2:2009 Edition 1 EN 205:2003 Edition 2 Table of changes Change No. Date Scope Acknowledgement The SABS Standards Division wishes to acknowledge the valuable assistance derived from publications of the European Committee
6、for Standardization (CEN). National foreword This South African standard was approved by National Committee SABS SC 1010A, Adhesives for wood Adhesives for wood, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was
7、published in November 2009. This SANS document supersedes SANS 10183:2000 (edition 1.1), in part. SANS 10183 consists of the following parts, under the general title Adhesives for wood: Part 1: Terminology and classification. Part 2: Structural applications. Part 3: Non-structural applications. Part
8、 4: Test methods. SANS 10183-3, in turn consists of the following sections: Section 1: Classification of thermoplastic wood adhesives for non-structural applications. Section 2: Determination of tensile shear strength of lap joints. Section 3: Classification of thermosetting wood adhesives for non-s
9、tructural applications. EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 205March 2003ICS 83.180 Supersedes EN 205:1991English versionAdhesives - Wood adhesives for non-structural applications -Determination of tensile shear strength of lap joints .Adhsifs - Colles pour bois usages non structuraux
10、-Dtermination du pouvoir adhsif des collageslongitudinaux par lessai de cisaillementKlebstoffe - Holzklebstoffe fr nichttragende Anwendungen- Bestimmung der Klebfestigkeit von Lngsklebungen imZugversuchThis European Standard was approved by CEN on 21 November 2002.CEN members are bound to comply wit
11、h the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre o
12、r to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.
13、CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATI
14、ONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2003 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 205:2003 ESANS 10183-3-2:2009This s tandard may only be used an
15、d printed by approved subscription and freemailing clients of the SABS .EN 205:2003 (E)2ContentspageForeword3Introduction .41 Scope 52 Normative references 53 Terms and definitions54 Principle55 Safety 56 Apparatus .67 Procedure .67.1 Preparation of bonded assemblies 67.2 Preparation of test pieces.
16、87.3 Number of test pieces .107.4 Treatment prior to tensile shear testing 107.5 Tensile shear test.108 Expression of results 109 Test report 10Annex A (informative) Single lap joint test pieces.12Bibliography 13SANS 10183-3-2:2009This s tandard may only be used and printed by approved subscription
17、and freemailing clients of the SABS .EN 205:2003 (E)3ForewordThis document (EN 205:2003) has been prepared by Technical Committee CEN/TC 193, “Adhesives“, thesecretariat of which is held by AENOR.This European Standard shall be given the status of a national standard, either by publication of an ide
18、ntical text orby endorsement, at the latest by September 2003, and conflicting national standards shall be withdrawn at thelatest by September 2003.This document supersedes EN 205:1991.Annex A is informative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of t
19、he followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SANS 10183-3
20、-2:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 205:2003 (E)4IntroductionEuropean Standards giving a common classification with respect to durability classes for wood adhesives will allowconsiderable improvement in consumer protecti
21、on in any future product liability system with regard to propertiesguaranteed by the adhesive manufacturer.The methods described in this standard are suitable for the following and other applications:- assessing the usability and quality of adhesives for wood and derived timber products;- classifyin
22、g these adhesives into the durability classes D1 to D4 of EN 204 (thermoplastic adhesives) and C1 to C4of EN 12765 (thermosetting adhesives);- assessing effects on the bond strength resulting from the bonding conditions chosen, the various conditioningsequences and the treatment of the test pieces b
23、efore and after bonding;SANS 10183-3-2:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 205:2003 (E)51 ScopeThis European Standard describes tests for adhesives for wood and derived timber products for the assessment oftheir resistance
24、to hot and cold water. It can be used for the assessment of the strength of bonds with a thin or thickbond-line. It does not apply to adhesives for structural use or to the manufacture of particle boards, fibreboardsand plywood. It does not replace tests on finished products.2 Normative referencesTh
25、is European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publica
26、tions apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 204, Classification of thermoplastic wood adhesives for non-structural applications.EN 923:1998, Adhes
27、ives Terms and definitionsEN 12765, Classification of thermosetting wood adhesives for non-structural applicationsISO 5893, Rubber and plastics test equipment Tensile, flexural and compression types (constant-rate-of-traverse) Specification.3 Terms and definitionsFor the purposes of this European St
28、andard, the terms and definitions given in EN 923:1998 and the followingapply.3.1thin bond lineclose contact adhesive joint where the adhesive layer is nominally 0.1 mm thick3.2thick bond linegap filled joint where the adhesive layer is (1,0 0,1) mm thick4 PrincipleA symmetrical bonded single lap jo
29、int between two symmetrical wooden adherends subjected to specifiedconditioning treatments and strained to rupture by a tensile force parallel to the grain.5 SafetyPersons using this standard shall be familiar with normal laboratory practice.This standard does not purport to address all the safety p
30、roblems, if any, associated with its use.It is the responsibility of the user to establish health and safety practices and to ensure compliance with anyEuropean or national regulatory conditions.SANS 10183-3-2:2009This s tandard may only be used and printed by approved subscription and freemailing c
31、lients of the SABS .EN 205:2003 (E)66 ApparatusThe testing machine shall be a constant-rate-of-traverse machine as described in ISO 5893.If a constant-rate-of-traverse machine is not available, a constant-rate-of-loading machine shall be used causing arupture within the time limits specified in 7.5.
32、The jaws shall grip the test pieces with a wedge action and permit self alignment whilst the test pieces are beingpulled.7 Procedure7.1 Preparation of bonded assemblies7.1.1 GeneralPrepare two panels (see Figure 1) from a thick unsteamed, conditioned, straight-grained board of beech (Fagussylvatica
33、L.) with a nominal density of (700 50) kg/m3 with a moisture content of (12 1) %. It is permissible toprepare panels from different boards unless it is essential to minimize differences in the wood in order to conductspecial comparative tests (see note 1).Ensure that the angle between the growth rin
34、gs and the surface to be bonded is between 30 and 90.Cut the panels across the direction of the grain to a length equal to a multiple of 300 mm with the necessaryallowance for cross-cutting and along the grain to a width of approximately 130 mm making an allowance for thewidth of cut as shown in Fig
35、ure 1.For tests on thin bond-lines, use two panels of (5,0 0,1) mm thickness.For tests on thick (1,0 0,1) mm bond-lines, use one thick panel of (6,0 0,1) mm thick and one panel of (5,0 0,1) mm thick. Make grooves (1,0 0,1) mm deep and (14 1) mm wide in the 6 mm thick panel as shown inFigure 1.NOTE 1
36、 When comparing the strength of an adhesive in thick and thin bond-lines, the differences in bond strength causedby differences in the wood should be minimized. In such cases, it is recommended that the panels to be tested are cut from thesame board in the direction of the grain in the following ord
37、er: two 5 mm panels for thin bond-lines; one 5 mm panel and one 6mm panel for thick bond-lines. The panels are usually cut slightly oversize and planed down to the required thickness beforeuse.SANS 10183-3-2:2009This s tandard may only be used and printed by approved subscription and freemailing cli
38、ents of the SABS .EN 205:2003 (E)7Dimensions in millimetres.Keya = 1,0 0,1 : thickness of bond-line l1 = 150 5: length of test pieceb = 20,0 0,2 : width of test piece s = 5,0 0,1 : thickness of the panelsc = grooves for thick bond-lineFigure 1 Example of a bonded panel marked for division into indiv
39、idual test pieces using 2,5 mm sawcutsSANS 10183-3-2:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 205:2003 (E)8For conventional tests, condition the panels at a temperature of either (20 2) C and (65 5) % relative humidityor (23 2)
40、C and (50 5) % relative humidity subsequently referred to as the standard atmosphere (20/65) or(23/50) for a minimum of 7 days.NOTE 2 For special materials or service conditions, conditioning environments other than that given above can be used ifrecommended by the manufacturer of the adhesive.Prepa
41、re bonded assemblies using thin (approximately 0,1 mm) bond-lines and if specified thick (1,00,1)mm)bond-lines.Not more than 24 h before bonding, either lightly plane or lightly sand each surface to be bonded (using anabrasive paper of grain size P100 complying with FEPA 43-1984 is recommended). Rem
42、ove any dust carefully. Donot touch or soil the prepared surfaces.Comply with the adhesive manufacturers instructions regarding the processing conditions, including thepreparation of the adhesive, the amount of adhesive to be applied, whether the adhesive is to be applied on one orboth surfaces, the
43、 open and closed assembly time and the magnitude and duration of the assembly pressure andreport them in the test report.Bond the panels with the pressure uniformly distributed over the bonded surface.7.1.2 Thin bond-lines (Close contact joints)Assemble under pressure two 5 mm thick panels as shown
44、in Figure 1.7.1.3 Thick bond-lines (Gap joints)Pour sufficient adhesive into the grooves of the grooved panel so that excessive adhesive will be squeezed outwhen pressure is applied. Assemble under pressure one 6 mm thick grooved panel with one 5 mm thick ungroovedpanel as shown in Figure 1.7.2 Prep
45、aration of test piecesAfter pressing and before cutting and testing, condition the assembly for a minimum of 7 days in a standardatmosphere.NOTE A longer conditioning time can be used if recommended by the adhesive manufacturer.Cut five strips of width b = (20 0,2) mm from each bonded assembly along
46、 the grain, avoiding areas within 7,5mm of the outside long edges of the panel as shown in Figure 1. Cut these strips into test pieces of length l1= (150 5) mm as shown in Figure 2.Make flat bottomed cuts of (2,5 0,5) mm wide in the bonded sections across the grain so that an overlap of widthl2= (10
47、,0 0,2) mm is defined in the middle section (see Figure 2). The cuts are to separate the wood layers. Takecare that the cuts completely cut through the bond line but only penetrate as little as possible into the other part ofthe joint.SANS 10183-3-2:2009This s tandard may only be used and printed by
48、 approved subscription and freemailing clients of the SABS .EN 205:2003 (E)9Dimensions in millimetres.a) with thin bond lineb) with thick bond-lineKeyl1= 150 5 : total length of test piece; s = 5,0 0,1: thickness of the panels:b = 20,0 0,2: width of test piece (width of tested surface); a = 30 to 90
49、 : angle between growth ring andsurfaces to be bonded;l2= 10,0 0,2: length of overlap (length of tested surface); a = 1,0 0,1: thickness of the thick bond-lineFigure 2 Lap joint test piecesSANS 10183-3-2:2009This s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .EN 205:2003 (E)107.3 Number of test piecesTest a sufficient number of test pieces to provide 10 valid results for each of the conditioning sequences chosen.Results from tests in which failure
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