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!%nT“2577549www.din.deDIN E
2、N 12703Adhesives for paper and board, packaging and disposable sanitary products Determination of low temperature flexibility or cold crack temperature;English version EN 12703:2016,English translation of DIN EN 12703:2016-10Klebstoffe fr Papier und Pappe, Verpackung und Hygieneprodukte Bestimmung d
3、es Kaltbruchverhaltens oder der Kaltbruchtemperatur;Englische Fassung EN 12703:2016,Englische bersetzung von DIN EN 12703:2016-10Adhsifs pour papier, carton, emballage et produits sanitaires jetables Dtermination de la flexibilit basse temprature ou de la temprature de fissuration froid;Version angl
4、aise EN 12703:2016,Traduction anglaise de DIN EN 12703:2016-10SupersedesDIN EN 12703:201206www.beuth.deDocument comprises 10 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.09.16 DIN EN 12703:2016-10 2 A comma is used as the de
5、cimal marker. National foreword This document (EN 12703:2016) 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. Amen
6、dments This standard differs from DIN EN 12703:2012-06 as follows: a) references to ISO 554 have been deleted; b) the standard has been editorially revised. Previous editions DIN EN 12703: 1999-10, 2012-06 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12703 August 2016 ICS 83.180 Supersedes E
7、N 12703:2012English Version Adhesives for paper and board, packaging and disposable sanitary products - Determination of low temperature flexibility or cold crack temperature Adhsifs pour papier, carton, emballage et produits sanitaires jetables - Dtermination de la flexibilit basse temprature ou de
8、 la temprature de fissuration froid Klebstoffe fr Papier, Verpackung und Hygieneprodukte - Bestimmung des Kaltbruchverhaltens oder der Kaltbruchtemperatur This European Standard was approved by CEN on 6 May 2016. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipula
9、te 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 or to any CEN member. This European Sta
10、ndard 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 official versions. CEN members are the na
11、tional 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, Norway, Poland, Portugal, Romania, S
12、lovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited 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 exploitation in any form and by any me
13、ans reserved worldwide for CEN national Members. Ref. No. EN 12703:2016 E2 Contents Page European foreword . 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Principle . 5 5 Apparatus . 5 6 Test specimens . 6 6.1 Sampling . 6 6.2 Dimensions 6 6.3 Preparation of the a
14、dhesive film . 6 7 Conditioning 6 8 Procedure. 7 8.1 Pass/fail test . 7 8.2 Determination of cold crack temperature . 7 9 Expression of results 8 9.1 Pass/fail test . 8 9.2 Cold crack temperature 8 10 Test report . 8 EN 12703:2016 (E) DIN EN 12703:2016-10 3 European foreword This document (EN 12703:
15、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 publication of an identical text or by endorsement, at the latest by February 2017, and conflicting nat
16、ional 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 held responsible for identifying any or all such patent rights. This document supersedes EN 12703:
17、2012. 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, Former Yugoslav Republic of Macedonia, Franc
18、e, 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. EN 12703:2016 (E) DIN EN 12703:2016-10 4 Introduction SAFETY STATEMENT Persons us
19、ing this document should be familiar 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 comp
20、liance with any regulatory conditions. 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
21、the extent possible. At the end of the test, the user of the standard should take care to carry out an appropriate disposal of the wastes, according to local regulation. EN 12703:2016 (E) DIN EN 12703:2016-10 5 1 Scope This European Standard specifies a method to determine whether a film of adhesive
22、 of given dimensions will craze, crack or fracture at a specified temperature. Alternatively, the temperature at which the film will craze, crack or fracture can be determined. The method described can be used as a quality control test, or to compare the flexibility of adhesives at low temperatures.
23、 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 references, the latest edition of the referenced document (including any amen
24、dments) applies. EN 923, 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 definitions given in EN 923 apply. 4 Princip
25、le An unsupported film of the adhesive, after conditioning, is bent through 180 over specified diameter cylindrical mandrel. The test piece is then examined for signs of fracture, crazing or cracking. The test may be carried out either as a pass/fail test or at successively lower temperatures until
26、a failure occurs. 5 Apparatus Specimens shall be conditioned for 24 h at 23 C and 50 % RH. 5.1 Bend test apparatus, as shown in Figure 1. The mandrel shall be made of rigid and suitably corrosion-resistant material, e.g. stainless steel. EN 12703:2016 (E) DIN EN 12703:2016-10 6 Key 1 stop of identic
27、al height to mandrel 2 mandrel 3 mandrel pin Figure 1 Bend test apparatus The diameter of the mandrel shall be (6,0 0,1) mm and the gap between the surface of the mandrel and the plates of the hinge shall be (0,55 0,1) mm. Other dimensions of the apparatus are not critical. The mandrel shall be free
28、 to rotate on its pin and the apparatus shall be provided with a stop to ensure that when the test piece is bent, the two plates of the hinge are parallel. 5.2 Chamber, capable of maintaining a specified temperature to an accuracy of 2 C throughout the test. NOTE A suitable range of temperature for
29、most purposes is 40 C to + 20 C. 6 Test specimens 6.1 Sampling The specimens shall be taken in accordance with EN ISO 15605 and prepared in accordance with EN 1067. 6.2 Dimensions The thickness of the test specimens shall be (0,4 0,1) mm but the other dimensions of the test specimens are not critica
30、l provided that the test specimen is rectangular and fits into the bend test apparatus. The test specimens shall be without visible flaws. 6.3 Preparation of the adhesive film The adhesive film shall be (0,4 0,1) mm thick and prepared by any suitable method. 7 Conditioning Condition the specimens an
31、d test apparatus at the temperature at which the test is to be carried out for a minimum period of 4 h. EN 12703:2016 (E) DIN EN 12703:2016-10 7 8 Procedure 8.1 Pass/fail test Open fully the bend test apparatus (5.1) and insert a conditioned specimen under the mandrel so that one end is against the
32、stop. Close the apparatus in not less than 1 s and not more than 2 s thus bending the specimens around the mandrel through 180 (see Figures 1 and 2). Figure 2 Bend test apparatus in use Care should be taken not to affect the temperature of the specimen with the fingers. Tongs conditioned at the test
33、 temperature or cotton gloves should be used. Preferably carry out the test in the chamber (5.2), but in any case ensure that warm air is excluded from the test specimen and mandrel while the test is carried out. Carry out a series of five tests using different test specimens conditioning the mandre
34、l before each test for an appropriate time to restore it to the test temperature. Examine the test specimen for visible signs of crazing, cracking or fracture. If any specimen shows signs of fracture, crazing or cracking, repeat the test. 8.2 Determination of cold crack temperature Carry out the pro
35、cedure described in 8.1 over a range of test temperatures at 5 C intervals using a fresh set of five test specimens at each temperature. NOTE It is advisable to carry out exploratory tests to determine the broad range within which the cold crack temperature lies. If any test specimen shows signs of
36、crazing, cracking or fracture, repeat the test. EN 12703:2016 (E) DIN EN 12703:2016-10 8 9 Expression of results 9.1 Pass/fail test Express the result as a failure at the specified temperature, if two or more of the test specimens show signs of crazing, cracking or fracture (this includes the result
37、 of a repeat test if any test specimen in the first set failed). Alternatively, express the result as a pass at the specified temperature. 9.2 Cold crack temperature Express the cold crack temperature as the highest temperature at which more than one test specimen shows signs of crazing, cracking or
38、 fracture. 10 Test report The report shall include: a) a reference to this European Standard; b) identification of the adhesive, giving all information for the sample; c) dimensions of the test specimens; d) details of the conditioning of the test specimen and test climatic conditions; e) the result of the pass/fail test at the specified temperature or the determined cold crack temperature; f) date of test. EN 12703:2016 (E) DIN EN 12703:2016-10
