1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1719:1999 The Europ
2、ean Standard EN 1719:1998 has the status of a British Standard ICS 83.180 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Adhesives for paper and board, packaging and disposable sanitary products Tack measurement for pressure-sensitive adhesives Determination of loop tackBS EN
3、 1719:1999 This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 February 1999 BSI 02-1999 ISBN 0 580 30864 2 Amendments issued since publication Am
4、d. No. Date Text affected National foreword This British Standard is the English language version of EN 1719:1998. The UK participation in its preparation was entrusted to Technical Committee PRI/52, Adhesives, which has the responsibility to: aid enquirers to understand the text; present to the res
5、ponsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its
6、 secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Sta
7、ndards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of p
8、ages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Br
9、ussels 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 EUROPEAN STANDARD EN 1719 NORME EUROPE ENNE EUROPA ISCHE NORM September 1998 ICS 83.180 Descriptors: adhesives, tests, measurements, adhesive strength, loops, p
10、rocedures English version Adhesives for paper and board, packaging and disposable sanitary products Tack measurement for pressure-sensitive adhesives Determination of loop tack Adhe sifs pour papier et carton, emballages et produits sanitaires consommables Mesurage de ladhe sivite des produits autoa
11、dhe sifs De termination de ladhe sivite dune boucle Klebstoffe fu r Papier, Verpackung und Hygieneprodukte Messung der Oberfla chenklebrigkeit von Haftklebstoffen Bestimmung der Oberfla chenklebrigkeit nach der Schlaufenmethode This European Standard was approved by CEN on 4 September 1998. CEN memb
12、ers 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 obtained on applicati
13、on to the Central Secretariat 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 Central Secretariat has the s
14、ame status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1719:1998 BSI
15、 02-1999 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 status of a national standard, either by publication of an identical text or by endorsement, at the latest by
16、March 1999, and conflicting national standards shall be withdrawn at the latest by March 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France,
17、 Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Definition 3 4 Safety 3 5 Test method 3 6 Expression of results 4 7 Test report 4Page 3 EN 1719:1998
18、BSI 02-1999 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 reference, provisions from other publications. These normative references a
19、re 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 incorporated in it by amendment or revision. For undated references the latest
20、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 standard the definitions in accordance with EN 923 and the following defi
21、nition 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 Safety Persons using this standard shall be familiar with normal laborator
22、y 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 European and national regulatory conditions. 5 Test method 5.1 Test equipmen
23、t 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 accuracy of 2%. 5.1.2 A flat rigid plate, of glass or metal with a defined
24、 surface finish, of minimum dimensions 30 mm3 30 mm3 3,0 mm. The test plates shall be thoroughly cleaned. 5.1.3 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 dr
25、y coating weight of (25 2) g/m 2 (deviation from this coating weight shall be reported). 5.2 Materials 5.2.1 Adhesives, 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 50mm. Th
26、e use of any other substrate shall be reported. 5.2.3 Release paper. 5.3 Preparation and conditioning of test pieces Coat the adhesive sample onto the polyester film to produce a consistent dry coating of (25 2) g/m 2 (deviation of this coating weight shall be reported). Cover this coating with rele
27、ase paper. Coating and drying the adhesive shall conform to the appropriate practice. Test pieces are stripes taken from the coated polyester film and shall be (25 0,5) mm wide and have a length of (175 2) mm in the machine direction. The cuts shall be clean and straight. A minimum of five strips sh
28、all be taken for each test. The strips shall be conditioned for (24 4) h before testing at standard climate of (23 2)8C and (50 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.Page
29、4 EN 1719:1998 BSI 02-1999 5.4 Test procedure The test shall be performed at standard climate as described in 5.3. Remove the release 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
30、 outermost, by bringing the two ends together. Clamp the ends of the loop for a distance of (10 1) mm into the top jaw of the tensile tester leaving the loop with a length of (155 4) mm hanging freely. The sides of the jaw should be protected from the adhesive coating. Clamp the plate in the jig as
31、described in 5.1.3 in the lower jaw (see Figure 1). Start the machine and bring the loop into contact with the plate at a speed of 5 mm/s. When a contact area of 25 mm3 25 mm approx. has been achieved, immediately reverse the direction of the machine and separate at a speed of 5 mm/s (see Figure 2).
32、 Record the maximum force (N) necessary to completely separate the loop from the plate. 6 Expression of results The loop tack value is expressed as the average in newtons (N) of five strips tested. 7 Test report The test report shall include the following: a) reference to this European Standard; b)
33、adhesive manufacturers name, grade and batch number of the other means of uniquely identifying the adhesive sample; c) method of preparation of the adhesive coating; d) coating weight if other than (25 2) g/m 2 ; e) specification of polyester film and release paper used; f) description of the surfac
34、e of flat rigid plate used; g) loop tack value in newtons (N); h) lowest and highest test result in newton (N) found in test series; i) comments based on visual inspection such as adhesive transfer, lift of adhesive from substrate, etc.; j) date of test.Page 5 EN 1719:1998 BSI 02-1999 Dimensions in
35、millimetres Figure 1 Test configuration at startPage 6 EN 1719:1998 BSI 02-1999 Dimensions in millimetres Figure 2 Test configuration at reverseblankBSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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