1、DEUTSCHE NORM April 199( I I Self-adhesive tapes Measurement of unwind adhesion at low speed English version of DIN EN 1944 I EN 1944 ICs 83.180 Descriptors: Adhesive tapes, testing. Klebebnder; Messung der Abrollkraft bei niedriger Geschwindigkeit European Standard EN 1944: 1996 has the status of a
2、 DIN Standard. National foreword This standard has been prepared by CEN/TC 253. The responsible German body involved in the preparation of this standard was the Normenausschu Verpackungswesen (Packaging Standards Committee). EN comprises 5 pages. Eeuih Verlag GmbH, Berlin, has the exclusive right of
3、 sale for German Standards (DIN-Normen). DIN EN 1944 Engl. Price group 10.96 Sales No. 11 EUROPEAN STANDARD NORME EUROPENNE EUROPKISCHE NORM EN 1944 February 1996 ICs 83.180 Descriptors: Adhesive tapes, testing. English version Self-ad hesive tapes Measurement of unwind adhesion at low speed Rubans
4、auto-adhsifs; mesure de la force de droulement faible vitesse Klebebnder; Messung der Abrollkraft bei niedriger Geschwindigkeit This European Standard was approved by CEN on 1996-01-14. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipu- late the conditions for givi
5、ng 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 Central Secretariat or to any CEN member. This European Standard exists in three official versi
6、ons (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. CEN members are the national standards bodies of Austria, Belgium, D
7、enmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 3
8、6, B-IO50 Brussels O 1996. All rights of reproduction and communication in any form and by any means reserved in all countries to CEN and its members. Ref. No. EN 1944:1996 E Page 2 EN 1944:1996 Contents Foreword ._ 2 1 Scope . 3 2 Definition ._._._._. 3 3 Principle ._._. _._ 3 4 Apparatus , 3 5 Tes
9、t pieces , 3 6 Pro ce d u re . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7 Expression of results . . 4 8 Test report ._._ 4 Foreword This European S
10、tandard has been prepared by Technical Committee CENTC 253 “Self adhesive tapes“ of which the secretariat is held by AFNOR. 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 August 1996, and conflic
11、ting national standards shall be withdrawn at the latest by August 1996. According to the CENCENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria Belgium, Denmark, Finland, France, Germany, Greece. Iceland, Ireland, Italy, Luxembourg, Netherlan
12、ds, Norway, Portugal Spain, Sweden, Switzerland and the United Kingdom Page 3 EN 194411996 1 Scope The standard specifies a method to measure the force required to unwind a roll of adhesive tape at low speed under standard test conditions. 2 Definition For the purposes of this standard, the followin
13、g definition applies . unwind adhesion : The force required to unroll the tape under prescribed conditions. 3 Principle The roll of adhesive tape is mounted on a mandrel so that it can turn without appreciable friction The mandrel is fixed in one clamp of the tensile testing machine and the free end
14、 of the adhesive tape is fixed in the other clamp and the unrolling force is measured. 4 Apparatus 4.1 Tensile testing machine with the following characteristics : - the force shall be indicated with a maximum error of 2 YO ; - the speed of the moveable clamp shall be 300 mm/min i 30 mm/min ; - the
15、scale shall be such that the readings obtained are between 15 YO and 85 YO of the complete scale ; - the clamps shall be serrated to prevent slipping or tearing of the adhesive tape - if a pendulum machine is used, ensure that the pendulum can swing freely. 4.2 mandrel shall be capable of turning fr
16、eely on its axis without appreciable friction. Mandrel and mounting the assembly shall conform generally to that shown in fig. i. The 5 Test pieces Select for test a roll of adhesive tape at least 1 O metres long and preferably 25 mm wide. Condition the sample roll for 24 h at 23 “C f 2 “C and 50 O/
17、O I 5 % relative humidity. Discard at least 3 outer turns of adhesive tape from the roll. Page 4 EN 1944:1996 6 Procedure 6.1 Standard test conditions : The test shall be carried out at 23 “C f 2 “C and 50 % f 5 YO relative humidity 6.2 tensile testing machine. Reset the machine to zero. Mount the r
18、oll of adhesive tape on the mandrel and fix the assembly in one clamp of the Attach the free end of the adhesive tape in the other clamp. Set the speed at 300 mmmin i 30 mm/min and start the tensile test machine After the driven clamp has moved 25 mm, record the mean and the minimum and maximum valu
19、es recorded during the next 1 minute. If necessary, continue the test until at least one complete turn of tape has been unwound. Carry out 5 tests at approximately equal intervals (about 2 metres) 7 Expression of results Express the results in newtons per centimetre width of adhesive tape Record the
20、 individual minimum and maximum readings and the arithmetic mean of the five values. Since the measurements made using different types of tensile testing machines (for example, electronic or pendulum) may not be directly comparable. The type of tensile testing machine used shall be indicated in the
21、report. 8 Testreport The test report shall include the following information a) a reference to this European Standard ; b) all information necessary to identify the test sample ; c) the type of tensile testing machine used , d) the date of the test ; e) the results obtained ; f) any operation not specified in this European Standard, which can influence the results. Page 5 EN 194411996 Figure 1
