1、October 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!%nU“2577550www.din.deDIN E
2、N 12704Adhesives for paper and board, packaging and disposable sanitary products Determination of foam formation for aqueous adhesives;English version EN 12704:2016,English translation of DIN EN 12704:2016-10Klebstoffe fr Papier und Pappe, Verpackung und Hygieneprodukte Bestimmung der Schaumbildung
3、von wssrigen Klebstoffen;Englische Fassung EN 12704:2016,Englische bersetzung von DIN EN 12704:2016-10Adhsifs pour papier, carton, emballage et produits sanitaires jetables Dtermination de la formation de mousse des adhsifs aqueux;Version anglaise EN 12704:2016,Traduction anglaise de DIN EN 12704:20
4、16-10SupersedesDIN EN 12704:201206www.beuth.deDocument comprises 10 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.09.16 DIN EN 12704:2016-10 2 A comma is used as the decimal marker. National foreword This document (EN 12704:2
5、016) has been prepared by Technical Committee CEN/TC 193 “Adhesives” (Secretariat: AENOR, Spain). At present, a DIN committee does not exist for this standard since the parties concerned have not shown any interest in work on the subject. Amendments This standard differs from DIN EN 12704:2012-06 as
6、 follows: a) references to ISO 554 have been deleted; b) the standard has been editorially revised. Previous editions DIN EN 12704: 2000-01, 2012-06 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12704 August 2016 ICS 83.180 Supersedes EN 12704:2012English Version Adhesives for paper and board
7、, packaging and disposable sanitary products - Determination of foam formation for aqueous adhesives Adhsifs pour papier, carton, emballage et produits sanitaires jetables - Dtermination de la formation de mousse des adhsifs aqueux Klebstoffe fr Papier, Verpackung und Hygieneprodukte - Bestimmung de
8、r Schaumbildung von wssrigen Klebstoffen This European Standard was approved by CEN on 6 May 2016. 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-t
9、o-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 European Standard exists in three official versions (English, French, German). A version in any other language made by transla
10、tion 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 the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland,
11、 Former 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION C
12、OMIT 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 any means reserved worldwide for CEN national Members. Ref. No. EN 12704:2016 E2 Contents Page European foreword . 3 In
13、troduction 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Principle . 5 5 Apparatus . 5 6 Procedure. 6 7 Expression of results 7 8 Test report . 7 Bibliography 8 EN 12704:2016 (E) DIN EN 12704:2016-10 3 European foreword This document (EN 12704:2016) has been prepared by Technica
14、l 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 February 2017, and conflicting national standards shall be withdrawn
15、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 patent rights. This document supersedes EN 12704:2012. According to the CEN-CENELEC
16、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, Germany, Greece, Hungary, Icelan
17、d, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. EN 12704:2016 (E) DIN EN 12704:2016-10 4 Introduction SAFETY STATEMENT Persons using this document should be familia
18、r with the normal laboratory practice, if 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 conditio
19、ns. ENVIRONMENTAL STATEMENT It is understood 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
20、the test, the user of the standard should take care to carry out an appropriate disposal of the wastes, according to local regulation. EN 12704:2016 (E) DIN EN 12704:2016-10 5 1 Scope This European Standard specifies a test method to determine the foam formation, or air entrainment during rapid stir
21、ring of aqueous adhesives with a maximum viscosity of 10 000 MPas at room temperature determined in accordance with EN 12092. 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 referenc
22、es, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 923, Adhesives - Terms and definitions EN 1067, Adhesives - Examination and preparation of samples for testing EN ISO 15605, Adhesives - Sampling (ISO 1560
23、5) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 923 apply. 4 Principle The adhesive is stirred under defined conditions and the foam formation determined from the differences between the initial and final volumes of the adhesive. 5 Apparatus Specim
24、ens shall be conditioned for 24 h at 23 C and 50 % RH. 5.1 Stirrer motor, capable of driving the stirrer at an adjustable rotary speed up to 3 000 min1. 5.2 Stirrer, with dimensions as shown in Figure 1. 5.3 Beaker, 2 l, of transparent material of approximately dimensions, h = 230 mm, d = 105 mm. 5.
25、4 Balance, accuracy 1,0 g. 5.5 Mechanical system, to secure the stirrer and beaker. 5.6 Timer, accuracy 1 s. 5.7 Ruler, accuracy 1 mm. EN 12704:2016 (E) DIN EN 12704:2016-10 6 Dimensions in millimetres Figure 1 Stirrer 6 Procedure 6.1 Take the sample in accordance with EN ISO 15605 and prepare the s
26、ample in accordance with EN 1067. Weigh (400 10) g directly into the clean beaker (5.3). 6.2 Position the stirrer (5.2) in the beaker so that it is approximately 1 mm from the bottom and the shaft of the stirrer is in the centre of the beaker, (1,00 mm). 6.3 Measure the initial height hi(in millimet
27、res) of the adhesive in the beaker. 6.4 Begin stirring slowly and increase to 2 500 min1over 10 s. 6.5 Start the timer (5.6) and continue stirring for 5 min. 6.6 Stop stirring and immediately measure the final max height hf(in millimetres) of the adhesive in the beaker. 6.7 Measure the height of the
28、 adhesive also after 1 min and 5 min. 6.8 Carry on minimum of 3 tests, each test consisting of three measurements of adhesive height after stirring (immediately, 1 min and 5 min), as described in 6.6 and 6.7. NOTE Comparison of the values of adhesive height taken immediately after stirring, after 1
29、min and after 5 min are an indication of foam stability. Faster decrease in foam height with time means worse foam stability. EN 12704:2016 (E) DIN EN 12704:2016-10 7 7 Expression of results Calculate the Foam Formation, f, as a percentage, calculated from the difference in height of the adhesive be
30、fore and after stirring, using the following equation: = fii00(%) 1hhfh(1) where hffinal height of adhesive after stirring, in millimetres; hiinitial height of adhesive before stirring, in millimetres; f (%) foam formation (as %). In each test, calculate the foam formation as the arithmetic mean of
31、the results of the three measurements of adhesive height carried out immediately after stirring, after 1 min and after 5 min. Express final value of Foam Formation obtained in the last three tests. 8 Test report Test report shall include: a) a reference to this European Standard; b) identification o
32、f the adhesive, giving all information for the sample; c) description of the adhesive (i.e. chemical type, pH, viscosity); d) number of tests carried out; e) foam formation; f) date of test. EN 12704:2016 (E) DIN EN 12704:2016-10 8 Bibliography EN 12092, Adhesives - Determination of viscosity EN 12704:2016 (E) DIN EN 12704:2016-10
