1、DEUTSCHE NORM November 1998 Adhesives for paper and board, packaging and disposable sanitary products Tack measurement for pressure-sensitive adhesives - I EN 1719 Determination of loop tack Enalish version of DIN EN 1719 ICs 83.1 80 Descriptors: Adhesives, tack, testing. Klebstoffe fr Papier, Verpa
2、ckung und Hygieneprodukte - Messung der Oberflchenklebrigkeit von Haft- klebstoffen - Bestimmung der Oberflchenklebrigkeit nach der Schlaufenmethode European Standard EN 1719 : 1998 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been prep
3、ared by CEN/TC 193. The responsible German body involved in its preparation was the Normenausschu Materialprfung (Mate- rials Testing Standards Committee), Technical Committee Prfung von Klebstoffen fr Papier, Verpackung und Hygieneprodukte. EN comprises 7 pages. No pari of this standard may be repr
4、oduced without the prior permission of Ref. No. DIN EN 1719: 1998-1 . . V Deutsches Institut fur Normung e VI Berlin Luth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen) English price group 06 Sales No 1106 04 99 COPYRIGHT DIN DEUTSCHES Institut Fur Nor
5、mung E.V.- EnglishLicensed by Information Handling ServicesCOPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1719 September 1998 ICs 83.180 Descriptors: Adhesives, tack, testing. English version Adh
6、esives for paper and board, packaging and disposable sanitary products Determination of loop tack Tack measurement for pressure-sensitive adhesives Adhsifs pour papier et carton, embal- lages et produits sanitaires consom- mables - Mesurage de Iadhsivit des produits autoadhsifs - Dtermination de Iad
7、hsivit dune boucle Klebstoffe fr Papier, Verpackung und Hygieneprodukte - Messung der Ober- flchenklebrigkeit von Haftklebstoffen - Bestimmung der Oberflchenklebrig- keit nach der Schlaufenmethode This European Standard was approved by CEN on 1998-09-04. CEN members are bound to comply with the CENK
8、ENELEC 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 stand- ards may be obtained on application to the Central Secretariat or to
9、any CEN member. The European Standards exist 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 Central Secretariat has the same status as the official versions.
10、CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Com
11、it Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1998. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN 1719 : 1998 E COPYRIGHT DIN DEUTSCHES Institut Fur Normun
12、g E.V.- EnglishLicensed by Information Handling ServicesPage 2 EN 1719: 1998 Contents Page Foreword 2 1 Scope . 3 2 Normative references . . . . . . . . . . . . , . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . . 3 3 Definition . 3 4 Safety . 3 5 Testrnethod 3 6 Expression of resul
13、ts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7 Testreport 6 Foreword This European Standard 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 st
14、atus of a national standard, either by publication of an identical text or by endorsement, at the latest by March 1999, and conflicting national standards shall be withdrawn at the latest by March 1999. According to the CENEENELEC Internal Regulations, the national standards organizations of the fol
15、lowing countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. COPYRIGHT DIN DEUTSCHES Institut Fur Nor
16、mung E.V.- EnglishLicensed by Information Handling ServicesPage 3 EN 1719: 1998 1 Scope This European Standard specifies a test method for the determination of “Loop Tack“ for coated pressure sensitive adhesives. 2 Normative references This European Standard incorporates, by dated or undated referen
17、ce, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporate
18、d in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 923 Adhesives - Terms and definitions EN 1066 Adhesives - Sampling EN 1067 Adhesives - Examination and preparation of samples for testing 3 Definition For the purposes of this stand
19、ard the definitions in accordance with EN 923 and the following definition apply: 3.1 loop tack: The maximum force required to separate at a specified speed, a loop of adhesive coated material (adhesive outermost) which has been brought into contact with a specified area of a defined surface. 4 Safe
20、ty Persons using this standard shall be familiar with normal laboratory practice. This standard does not purport to address all the safety problems, if any, associated with its use. It is the responsibility of the user to establish safety and health practices and to ensure compliance with any Europe
21、an and national regulatory conditions. 5 lest method 5.1 Test equipment 5.1.1 A tensile testing machine, with reversing facility and a vertical jaw separation rate of 5 mm/s with an accuracy of * 2%. It shall also have a capability of measuring loads up to 100 N. The measuring cell shall have an acc
22、uracy of 2%. COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 4 EN 1719: 1998 5.1.2 A flat rigid plate of glass or metal with a defined surface finish, of minimum dimensions 30 mm x 30 mm x 3,O mm. The test plates shall be thoroughly cleaned. 5.
23、1.3 A jig to attach the plate in a horizontal position to the lower jaw of the tensile test machine. 5.1.4 Suitable equipment for the preparation of an adhesives coating with a consistent dry coating weight of (25 I 2) um2 (deviation from this coating weight shall be reported). 5.2 Materials 5.2.1 A
24、dhesives Take the samples to be tested in accordance with EN 1066. Examine and prepare this sample for testing in accordance with EN 1067. 5.2.2 Polyester film with a thickness of 50 pm The use of any other substrate shall be reported. 5.2.3 Release paper 5.3 Preparation and conditioning of test pie
25、ces Coat the adhesive sample onto the polyester film to produce a consistent dry coating of (25 I 2) g/m2 (deviation of this coating weight shall be reported). Cover this coating with release paper. Coating and drying the adhesive shall conform to the appropriate practice. Test pieces are stripes ta
26、ken from the coated polyester film and shall be (25 I 0,5) mm wide and have a length of (175 rt 2) mm in the machine direction. The cuts shall be clean and straight. A minimum of five strips shall be taken for each test. The strips shall be conditioned for (24 f 4) h before testing at standard clima
27、te of (23 * 2) OC and (50 I 5)% R.H. Prior to use the cleaned plates shall be left for a minimum of 30 min under the same conditions. Care shall be taken to handle clean plates by the edge only. 5.4 Test procedure The test shall be performed at standard climate as described in 5.3 Remove the release
28、 paper from each strip immediately prior to the test being carried out. Hold the two ends of the adhesive coated strip and form the strip into a loop, adhesive surface outermost, by bringing the two ends together. Clamp the ends of the loop for a distance of (10 I 1) mm into the top jaw of the tensi
29、le tester leaving the loop with a length of (155 * 4) mm hanging freely. COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 5 EN 1719: 1998 The sides of the jaw should be protected from the adhesive coating. Clamp the plate in the jig as described
30、 in 5.1.3 in the lower jaw (see Figure 1). Dimensions in millimeters zi = 5 mm/s 4 Figure 1 : Test configuration at stad Start the machine and bring the loop into contact with the plate at a speed of 5 mds. When a contact area of 25 mm x 25 mm approx. has been achieved, immediately reverse the direc
31、tion of the machine and separate at a speed of 5 mm/s (see Figure 2). COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 6 EN 1719: 1998 Dimensions in millimeters 25 approx. - Figure 2: Test configuration at reverse Record the maximum force (N) ne
32、cessary to completely separate the loop from the plate. 6 Expression of results The loop tack value is expressed as the average in newton of five strips tested. 7 Test report The test report shall include the following: a) reference to this European Standard; b) adhesive manufacturers name, grade an
33、d batch number of the other means of uniquely identifying the adhesive sample; c) method of preparation of the adhesive coating; COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling ServicesPage 7 EN 1719: 1998 d) coating weight (if other than 25 * 2 g/m2); e) s
34、pecification of polyester film and release paper used; f) g) description of the surface of flat rigid plate used; loop tack value in Newton; h) lowest and highest test result in Newton found in test series; 0 comments based on visual inspection such as adhesive transfer, lift of adhesive from substrate, etc.; j) date of test. COPYRIGHT DIN DEUTSCHES Institut Fur Normung E.V.- EnglishLicensed by Information Handling Services
