1、 BSI BS*EN*L941 96 W 1624669 0567732 282 D BRITISH STANDARD Self adhesive tapes - Measurement of elongation at break * m * The European Standard EN 1941 : 1996 has the status of a British Standard ICs 83.180 BS EN 1941 : 1996 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW i ,
2、 I r - BSI BS*EN*1941 96 m 1624669 0567733 119 Amd. No. Date BS EN 1941 : 1996 Text affected Committees responsible for this British Standard The preparation of this British Standxd was entrusted to Technical Committee PKWB, Distribution packaging, tramport, packaging and unit loads, upon which the
3、following bodies were represented This British Standard, having been prepared under the direction of the Consumer Products and Services Sector Board, was published under the authority of the Sandards Board and comes into effect on 15 October 1996 O BSI 1996 British Adhesives and Sealants Association
4、 British Apparel and Textile Confederation British Carton Association British Coatings Federation Ltd. British Fibreboard Packaging Association British Glass Manufacturers Confederation British industnal Truck Association British Plastics Federation British Retail Consortium British Rubber Manufactu
5、rers Association Ltd. British Tensional Srapping Association Ltd. British Timber Merchants Association British Wood Preserving and Damp-proofing Chamber of Shipping Chemical Industries Association China Clay Association Cranfield Logistics Department of Transport Engineering Equipment and Materials
6、Users Federation of the Electronics Industry Flexible IBC Association Food and Drink Federation independent Pallet Repair Committee institute of Grocery Distribution Metal Packaging Manufacturers Association Ministry of Defence National Association of Pallet Distributors Power Fastenings Association
7、 pira International Road Haulage Association Ltd. Society of Motor Manufacturers and Traders Storage Equipment Manufacturers Association Timber Packaging and Pallet Confederation amber Research and Development United Kingdom Softwood Sawmillers Association Association Ltd. Association Associa ti on
8、The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Adhesive Tape Manufacturers Association British Footwear Manufacturers Federation British Steel industry (Wire Section) Packaging Distributors Association Pressure Sensitive Manufacturers As
9、sociation The following BSI references relate to the work on this standard: Committee reference PKW/3 Draft for comment 92/4244 DC ISBN O 680 26228 6 BSI BS*EN*L4L b 1624bb 05b7734 055 BS EN 1941 : 1996 Contents page Committees responsible Inside front cover National foreword ii Foreword 2 Text of E
10、N 1941 3 * * u O BSI 1996 i BSI BS*EN*l4L b m Lb24bb9 0567735 T91 m BS EN 1941 : 1996 National foreword This British Standard has been prepared by Technical Committee PKWB and is the English language version of EN 1941 : 1996 Self adhes.ive tupe-s - Mmurement of elongation at break published by the
11、European Committee for Standardization ICEN). Compliance with a British Standard does not of itself confer immunity from legal obligations. ii O BSI 1996 BSI BS*EN*iL941 b Lb24bb9 05b773b 928 m EuRopEAN STANDARD EN 1941 NORME EuR0PEE;”E EUROP- NOFW February 199 ICs 83.180 Descriptors: Adhesive tapes
12、, tension tapes, elongation at break English version Self adhesive tapes - Measurement of elongation at break Rubans autuadha - Mesure de lallongement ia rupture Klebebnder - Messung der Reidehnung This European Standard was approved by CEN on 1!29641-14. CEN members are bound to comply with the CEN
13、/CENELEC Internal Regdations which stipulate the conditions for giving this European Standard the status of a national stanard without any alteration. Upto-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any
14、 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 same status as the officiai versions. CE
15、N members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Gemx Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. European Committee for Standardhtion Comit Europen de Normalisation Europisches K
16、omitee fur Normung Central Secretariat: rue de Stassart 36, B-1060 Brussels O 1996 All rights of reproduction and communication in any form and by any means reserved in all counh-ies to CEN and its members. Ref, No. EN 1941 : 1996 E Foreword This European Standard has been prepared by khnical Commit
17、tee CENK 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 confiicting national standards shall be withdrawn at
18、the latest by August 1996, According to the CEN/CENELEC Internai Regulations, the following countries are bound to implement this European Smdard Austria, Belgium, Denmark, Finkuid, France, Germany, Greece, Iceland, Irehd, Italy, Luxembourg, Netherlands, Norway, Portugai, Spain, Sweden, Switzerland
19、and the United Kingdom. Contents Foreword 1 Scope 2 Denition 3 principle 4 4P- 6 6 Procedure 7 Expression of results 8 Test report Test sample and test pieces page 2 3 3 3 3 3 3 3 3 O BSI 1996 1 scope This standard specifies a method to measure the elongation of a self adhesive tape when it is subje
20、cted to a tensile force sufcient to cause it to break. The elongation at break of the adhesive tape is of value as an indication of its uniformity and quality, as well as a rough indication of its ability to conform to curved and irregular surfaces. It is usually determined at the same time as the b
21、reakang strength. The maximum width of adhesive tape tested by this method is 25 m. For adhesive tapes of this width or less, the elongation at break measured corresponds to that as supplied commerciaiiy, with factory-cut edges. For adhesive tapes wider than 25 mm, this test method provides for the
22、tape to be cut down to 25 mm with a wellsharpened instrument. In such cases, because of the better cutting of the edges, the results can be higher than would be found on commercial adhesive tape. 2 Denition For the purposes of this standard, the following definition applies: elongation at break The
23、increase in length of the adhesive tape at the time of breaking as a percentage of the 0righ-d length. 3 Principle The method consists of holding the adhesive tape vertically by the two clamps of a tensile testing machine. The elongation test is carried out una the adhesive tape breaks. 4 Apparatus
24、Tm testing machine, with the following characteristcs: - the force shall be indicated with a maximum error - the speed of the moveable clamp shall be 300 mm/min f 30 mm/h, - the scale shall be such that the re- obtained are between 15 % and 85 % of the complete scale; - the clamps shall be serrated
25、to prevent slipping or tearing of the adhesive tape; - if a pendulum machine is used, ensure that the pendulum can swing freely. of 2 04 5 Wst sample and test pieces Condition the sample roll for 24 hours at 23 “C f 2 “C and 50 % f 5 % relative humidity Discard the 3 outer turns of adhesive tape fro
26、m the roll. We from each roll 5 test pieces. Each test piece shall be 200 mm long and the same width as the adhesive tape. For widths greater than 25 mm, a test piece 25 mm wide shall be cut longitudinally from the adhesive tape. Use a sharp knife to obtain clean-cut edges. 6 Procedure 6.1 The test
27、shall be carried out at the standard conditions of 23 “C * 2 “C and 50 % f 5 % relative humidity 6.2 Remove the test pieces radially from the roil at an approxjmate speed of 300 mms, then condition for a further 2 h in the standard test conditions in order to remove all srain and distortion due to u
28、nwinding. 6.3 Set the clamps 100 mm apart. Clamp the test piece finnly so that the longitudinal axis is vertical and in lhe with the direction of the applied force. Check that the clamps move in the .same plane and parallel to the applied force and that the speed of separation is 300 mm/min 30 mmmin
29、. Reject ali test pieces which break within 5 mm of the clamps and carry out sufficient further tests to obtain 5 test pieces which break in the correct manner. Measure the distance between the clamps at break. 7 Expression of results Record the results as the percentage increase in the length of ad
30、hesive tape between the clamps when the adhesive tape breaks. Express the results as a percentage to the nearest whole number. Arrange the five readings in ascending numerical order. We the central value (median) as the elongation at break of the adhesive tape under test Because the resuits obtained
31、 with different tensie testing machines (pendulum or electronic) may not be directly comparable, the type of machine used shall be included in the test report. 8 !kst report The test report shail include the following information: a) a reference to this European Standard; b) ai information necessary
32、 to identify the test sample; c) the type of tensile testing machine used; d) the date of the test; e) the result obtained; f) any operation not specified in this European Standard which can influence the results. O BSI 1996 BSI BS*EN*L4L 96 Lb24bb9 05b7739 637 = BS EN 1941 : 1996 BSI 389 Chiswick H
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