1、July 2011 Translation by DIN-Sprachendienst.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
2、.180!$sG4“1803617www.din.deDDIN EN 12962Adhesives Determination of elastic behaviour of liquid adhesives (elasticity index)English translation of DIN EN 12962:2011-07Klebstoffe Bestimmung des elastischen Verhaltens flssiger Klebstoffe (Elastizittsindex)Englische bersetzung von DIN EN 12962:2011-07Ad
3、hsifs Dtermination du comportement lastique des adhsifs liquides (indice dlasticit)Traduction anglaise de DIN EN 12962:2011-07SupersedesDIN EN 12962:2001-07www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1006.11 DIN EN 12962:2011-0
4、7 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 193 “Adhesives” (Secretariat: AENOR, Spain). Amendments This standard differs from DIN EN 12962:2001-07 as follows: a) the foreword now includes a “Safety Statement” and an “Env
5、ironmental Statement” to replace the former Clause 5 “Safety”; b) Clause 2 “Normative references” has been updated: EN ISO 15605, Adhesives Sampling (ISO 15605:2000) has been added; EN 1066, Adhesives Sampling has been deleted; EN 923:2005+A1:2008 is now a dated reference; c) Figure 1 “Spindle” has
6、been revised; d) in Subclause 6.10, the stopwatch and the motor of the rotating stirrer are to be stopped after (30 1) s from starting (instead of (300 1) s); e) the standard has been editorially revised. Previous editions DIN EN 12962: 2001-07 The responsible German body involved in its preparation
7、 was the Normenausschuss Kunststoffe (Plastics Standards Committee), Working Committee NA 054-04-06 AA Klebstoffe Terminologie; physikalisch-chemische Prfungen. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12962 April 2011 ICS 83.180 Supersedes EN 12962:2001English Version Adhesives - Determ
8、ination of elastic behaviour of liquid adhesives (elasticity index) Adhsifs - Dtermination du comportement lastique des adhsifs liquides (indice dlasticit) Klebstoffe - Bestimmung des elastischen Verhaltens flssiger Klebstoffe (Elastizittsindex) This European Standard was approved by CEN on 10 March
9、 2011. 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 and bibliographical references concerning such national standards may be obtain
10、ed 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 the responsibility of a CEN member into its own language and notified to the CEN-
11、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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, M
12、alta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of ex
13、ploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12962:2011: EEN 12962:2011 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 53 Terms and definitions .54 Principle 55 Apparatus .56 Procedure .57 Expression of results 78 Test
14、 report 7Bibliography 8DIN EN 12962:2011-07 EN 12962:2011 (E) 3 Foreword This document (EN 12962:2011) 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 public
15、ation of an identical text or by endorsement, at the latest by October 2011, and conflicting national standards shall be withdrawn at the latest by October 2011. 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 s
16、hall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12962:2001. The main modifications regarding the previous version are in Figure 1 and 6.10. SAFETY STATEMENT Persons using this document should be familiar with the normal laboratory practice, if
17、applicable. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices and to ensure compliance with any regulatory conditions. ENVIRONMENTAL STATEMENT It is understo
18、od that some of the material permitted in this standard may have negative environmental impact. As technological advantages lead to acceptable alternatives for these materials, they will be eliminated from this standard to the extent possible. At the end of the test, the user of the standard should
19、take care to carry out an appropriate disposal of the wastes, according to local regulation. 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, Croatia, Cyprus,
20、Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 12962:2011-07 EN 12962:2011 (E) 4
21、Introduction Many liquid elastomeric adhesives show, depending on the nature of basic elastomer, under specific conditions an elastic behaviour. The elastic behaviour of an adhesive apart of its viscosity is of great practical significance. It affects both processability (by brush or roller) of an a
22、dhesive and its bonding properties to porous substrates like wood, leather or fabric. For achieving optimum bond strength on porous substrates it is indispensable to adjust both viscosity and elasticity to the porosity of the substrates to be bonded. At a given viscosity, if the elasticity is too hi
23、gh, the adhesive will only rest on the surface of the substrate without penetration and anchoring in the substrate. If, on the contrary, the elasticity is too low, the adhesive is almost completely absorbed by the porous substrate without being able to form a bond-line. In both cases a lower bond st
24、rength results. A “cone and plate rheometer“ as specified in EN 12092 allows to determine viscosity and elasticity of an adhesive by measurement of shear tension and tension vertical to shear tension (“normal tension“). However, a “cone and plate rheometer“ is very expensive and its maintenance too,
25、 operating requires a skilled staff, and cleaning is time-consuming. It is mainly used for scientific purposes. DIN EN 12962:2011-07 EN 12962:2011 (E) 5 1 Scope This European Standard specifies a test method to determine the elastic behaviour of and elastomeric monocomponent liquid adhesive under sp
26、ecified conditions. This method is particularly suitable for production control. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the r
27、eferenced document (including any amendments) applies. EN 923:2005+A1:2008, Adhesives Terms and definitions EN 1067, Adhesives Examination and preparation of samples for testing EN ISO 15605, Adhesives Sampling (ISO 15605:2000) 3 Terms and definitions For the purposes of this document, the terms and
28、 definitions given in EN 923:2005+A1:2008 apply. 4 Principle A specifically shaped and graduated spindle (see Figure 1) is dipped into the adhesive to be tested. The shaft of the spindle is attached to a motor rotating at a constant specified speed for a certain period of time. During rotation, the
29、adhesive under test rises (in equilibrium to gravitation) up to a reproducible height on reading of the spindle shaft. The height (in millimetres) measured is taken as “elasticity index“. 5 Apparatus 5.1 Beakers, of 100 mm diameter, capacity about 1 000 ml (see Figure 1). 5.2 Spindle, with size and
30、dimensions shown in Figure 1, with markings at 10 mm intervals and sub-graduated to millimetres. 5.3 Mechanical or electronic stirrer, with the possibility of fine speed control. 5.4 Analytical balance, with scale divisions of 0,01 g. 5.5 Stopwatch, or other suitable timing-device with accuracy of 0
31、,2 s or higher. 5.6 Temperature-controlled room or enclosure, capable of maintaining the sample and the necessary apparatus at (23,0 0,5) C. 6 Procedure 6.1 Carry out the determination in duplicate. DIN EN 12962:2011-07 EN 12962:2011 (E) 6 6.2 A significant sample of the adhesive shall be taken in a
32、ccordance with EN ISO 15605 and prepared for testing as described in EN 1067. Store the sample in a closed container and keep it in the temperature-controlled room (5.6) until the sample reaches (23 2) C (at least 30 min). In order to minimize evaporation of solvent, the operations from 6.3 to 6.8 s
33、hall be carried out in the shortest possible time. 6.3 Weight (200,0 0,1) g of the adhesive under test into the beaker (5.1). 6.4 Place the beaker containing the adhesive under the stirrer (5.3) taking care to centre the beaker. Dimensions in millimetres Key 1 Solution level Figure 1 Spindle DIN EN
34、12962:2011-07 EN 12962:2011 (E) 7 6.5 Dip slowly the spindle (5.2) into the adhesive avoiding trapping air bubbles in the liquid (for example hold the spindle at an angle of approximately 45 to the surface of the product and manually turn during the immersion). 6.6 Insert the spindle in the mandrel
35、of the stirrer. 6.7 Regulate the spindle immersion until the liquid reaches the highest part of the cone: position zero, and lock the mandrel of the stirrer. 6.8 Protect the adhesive by covering the beaker with a properly shaped paper. 6.9 Start the motor set at the speed of (300 10) min-1. 6.10 Sta
36、rt the stopwatch simultaneously with the motor and then stop both after (30 1) s from the starting. 6.11 Read and note the height reached by the adhesive on the shaft of the spindle for the test report. Ignore any value exceeding 50 mm and the results of any tests during which an irregular, irreprod
37、ucible behaviour of the adhesive on the rotating stirrer was stated, e.g. a “throwing“ caused by centrifugal forces. 6.12 Clean the spindle with a suitable solvent (acetone, aliphatic hydrocarbons or ethanol) and repeat the measurement. 6.13 Take the average of the two values measured. 7 Expression
38、of results Express the “elasticity index“ as the mean of the duplicate determination (6.11) in millimetres rounded to the nearest 1 mm. 8 Test report The test report shall include: a) a reference to this European Standard, i.e. EN 12962; b) all details necessary for a complete identification of the adhesive tested; c) any circumstances which may have affected the result; d) the test results according to Clause 7, individual and mean values; e) date of the test. DIN EN 12962:2011-07 EN 12962:2011 (E) 8 Bibliography EN 12092, Adhesives Determination of viscosity DIN EN 12962:2011-07
