1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1721:1999 The Europ
2、ean Standard EN 1721:1998 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 rolling ball t
3、ackBS EN 1721:1999 This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemcials, was published under the authority of the Standards Committee and comes into effect on 15 March 1999 BSI 03-1999 ISBN 0 580 30863 4 Amendments issued since publicati
4、on Amd. No. Date Text affected National foreword This British Standard is the English language version of EN 1721:1998. The UK participation in its preparation was entrusted to Technical Committee PRI/52, Rubber compounding ingredients, which has the responsibility to: aid enquirers to understand th
5、e text; present to the responsible 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
6、obtained on request to its 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 “Fin
7、d” facility of the BSI Standards 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
8、 obligations. Summary of pages 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
9、 de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. 1721:1998 E EUROPEAN STANDARD EN 1721 NORME EUROPE ENNE EUROPA ISCHE NORM October 1998 ICS 83.180 Descriptors: adhesives, tests, measurements, adhes
10、ive strength, balls, procedures English version Adhesives for paper and board, packaging and disposable sanitary products Tack measurement for pressure sensitive adhesives Determination of rolling ball tack Adhe sifs pour papier et carton, emballages et produits sanitaires consommables Mesurage de l
11、adhe sivite des produits autoadhe sifs De termination de ladhe sivite dune bille roulante Klebstoffe fu r Papier, Verpackung und Hygieneprodukte Messung der Oberfla chenklebrigkeit von Haftklebstoffen Bestimmung der Oberfla chenklebrigkeit nach der Methode “Rollende Kugel” This European Standard was
12、 approved by CEN on 25 September 1998. 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
13、national standards may be obtained on application 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 an
14、d notified to the Central Secretariat has the same 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, Switzer
15、land and United Kingdom.Page 2 EN 1721:1998 BSI 03-1999 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 iden
16、tical text or by endorsement, at the latest by April 1999, and conflicting national standards shall be withdrawn at the latest by April 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standa
17、rd: Austria, Belgium, Czech Republic, Denmark, Finland, France, 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 equipme
18、nt 3 6 Materials 6 7 Preparation and conditioning of test pieces 6 8 Test procedure 6 9 Expression of results 6 10 Test report 6Page 3 EN 1721:1998 BSI 03-1999 1 Scope This test method specifies a “Rolling Ball Tack” test method for coated pressure sensitive adhesives. 2 Normative references This Eu
19、ropean Standard incorporates, by dated or undated reference, 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 publicati
20、ons apply to this European Standard only when incorporated 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
21、 for testing. 3 Definition For the purpose of this standard the definitions in accordance with EN 923 and the following definition apply. 3.1 rolling ball tack distance a specified rolling ball travels on an adhesive layer before stopping, after it has been allowed to roll down a defined incline 4 S
22、afety 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 Eur
23、opean and national regulatory conditions. 5 Test equipment 5.1 An inclined trough, equipped with a release lever at the top through which the ball gains downhill momentum. 5.2 A solid ball, with 10 mm diameter made of stainless steel which shall be thoroughly cleaned. The equipment is described in F
24、igures 1 and 2. 5.3 A test table, with a hard horizontal surface e.g. a metal or glass plate. 5.4 Suitable equipment for the preparation of an adhesive coating, with a consistent dry coating weight of (25 2) g/m 2 . Deviation from this coating weight shall be reported. BSI 03-1999 Page 4 EN 1721:199
25、8 Dimensions in millimetres SURFACES M AND N MUST BE PARALLEL 1 these two edges to be parallel 2 release position 3 adhesive layer Figure 1 Incline for rolling ball testPage 5 EN 1721:1998 BSI 03-1999 1 circular spirit level 5 distance between end of incline and ball 2 release level 6 10 mm diameter
26、, steel ball 3 release 7 Adhesive coating 4 inclined trough 8 Hold down tape or weight Figure 2 Apparatus and specimen showing distance of roll that is measuredPage 6 EN 1721:1998 BSI 03-1999 6 Materials 6.1 Adhesive, sampling shall be carried out in accordance with EN 1066 and preparation of sample
27、s in accordance with EN 1067. 6.2 Polyester film, with a thickness of 50mm. 6.3 Release paper. 7 Preparation and conditioning of test pieces Coat the adhesive sample onto the polyester film to produce a consistent coating of (25 2) g/m 2 . Deviation from this coating weight shall be reported. Cover
28、this coating with release paper. Coating and drying of the adhesive shall conform to the appropriate commercial practice. NOTE A transfer coating technique can also be used. Test specimens are strips taken from the coated polyester film and generally about 50 mm wide and approximately 380 mm long. S
29、pecific dimensions can be selected for the adhesive to be tested since the length needs only to be sufficient to allow the adhesive to stop the ball, and the width needs to be only wide enough to encompass the ball track. A minimum of 5 test specimens shall be prepared. The adhesive coatings shall b
30、e conditioned for (24 4) h before testing at standard climate of (23 2)8C and (50 5) % R.H. Prior to use the cleaned balls shall be left for a minimum of 30 min under the same conditions. Balls shall only be handled using tools. 8 Test procedure The test shall be performed at standard climate as des
31、cribed in clause 7. Prior to each test ensure that the inclined trough is clean. Arrange the strips to be tested with the adhesive coating uppermost in line with the inclined trough. The strips shall be free of any wrinkles, creases, or splices. The end of the strips opposite the incline shall be he
32、ld to the table with a tape or a weight as shown in Figure 2. Only one test shall be run on each strip. For each test a new cleaned and conditioned ball is placed with a suitable tool on the upper side of the release of the inclined trough. Release the ball and allow it to roll to a stop on the adhe
33、sive. Measure the distance in millimetres from the centre of contact between the ball and adhesive to the near end of the incline. 9 Expression of results The rolling ball tack shall be expressed as the average in millimetres of the stopping distance measurements of the five strips tested. 10 Test r
34、eport The test report shall include the following information: a) reference to this European Standard; b) adhesive manufacturers name, grade and batch number or other means of uniquely identifying the adhesive sample; c) method of preparation of the adhesive coating; d) coating weight (if other than
35、 25 g/m 2 2 g/m 2 ); e) specifications of polyester film and release paper used; f) rolling ball tack value in millimetres; g) lowest and highest test result in millimetres found in test series; h) comments based on visual inspection, e.g. adhesive transfer, lift of adhesive from substrate, etc.; i)
36、 the date of test.blankBSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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