1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1941 : 1996 The Eur
2、opean Standard EN 1941 : 1996 has the status of a British Standard ICS 83.180 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Self adhesive tapes Measurement of elongation at breakThis British Standard, having been prepared under the direction of the Consumer Products and Serv
3、ices Sector Board, was published under the authority of the Standards Board and comes into effect on 15 October 1996 BSI 1996 The following BSI references relate to the work on this standard: Committee reference PKW/3 Draft for comment 92/42644 DC ISBN 0 580 26228 6 BS EN 1941 : 1996 Amendments issu
4、ed since publication Amd. No. Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee PKW/3, Distribution packaging, transport, packaging and unit loads, upon which the following bodies were represented: Britis
5、h Adhesives and Sealants Association British Apparel and Textile Confederation British Carton Association British Coatings Federation Ltd. British Fibreboard Packaging Association British Glass Manufacturers Confederation British Industrial Truck Association British Plastics Federation British Retai
6、l Consortium British Rubber Manufacturers Association Ltd. British Tensional Strapping Association Ltd. British Timber Merchants Association British Wood Preserving and Damp-proofing Association Chamber of Shipping Chemical Industries Association China Clay Association Cranfield Logistics Department
7、 of Transport Engineering Equipment and Materials Users Association 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 A
8、ssociation of Pallet Distributors Power Fastenings Association Pira International Road Haulage Association Ltd. Society of Motor Manufacturers and Traders Ltd. Storage Equipment Manufacturers Association Timber Packaging and Pallet Confederation Timber Research and Development Association United Kin
9、gdom Softwood Sawmillers Association 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 Associatio
10、n Pressure Sensitive Manufacturers AssociationBS EN 1941 : 1996 BSI 1996 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 1941 3ii BSI 1996 BS EN 1941 : 1996 National foreword This British Standard has been prepared by Technical Committee PKW/3 and
11、 is the English language version of EN 1941 : 1996 Self adhesive tapes Measurement of elongation at break published by the European Committee for Standardization (CEN). Compliance with a British Standard does not of itself confer immunity from legal obligations.CEN European Committee for Standardiza
12、tion Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 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 1941 : 1996 E EUROPEAN STAND
13、ARD EN 1941 NORME EUROPE ENNE EUROPA ISCHE NORM February 1996 ICS 83.180 Descriptors: Adhesive tapes, tension tapes, elongation at break English version Self adhesive tapes Measurement of elongation at break Rubans auto-adhe sifs Mesure de lallongement a la rupture Klebeba nder Messung der Reibdehnu
14、ng This European Standard was approved by CEN on 1996-01-14. 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 refer
15、ences 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 versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member in
16、to 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, S
17、witzerland and United Kingdom.Page 2 EN 1941 : 1996 BSI 1996 Foreword This European Standard has been prepared by Technical Committee CEN/TC 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 publica
18、tion of an identical text or by endorsement, at the latest by August 1996, and conflicting national standards shall be withdrawn at the latest by August 1996. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, D
19、enmark, 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 Definition 3 3 Principle 3 4 Apparatus 3 5 Test sample and test pieces 3 6 Procedure 3 7 Expression of
20、 results 3 8 Test report 3Page 3 EN 1941 : 1996 BSI 1996 1 Scope This standard specifies a method to measure the elongation of a self adhesive tape when it is subjected to a tensile force sufficient to cause it to break. The elongation at break of the adhesive tape is of value as an indication of it
21、s 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 breaking strength. The maximum width of adhesive tape tested by this method is 25 mm. For adhesive tapes of this width or less, the elo
22、ngation at break measured corresponds to that as supplied commercially, with factory-cut edges. For adhesive tapes wider than 25 mm, this test method provides for the tape to be cut down to 25 mm with a well-sharpened instrument. In such cases, because of the better cutting of the edges, the results
23、 can be higher than would be found on commercial adhesive tape. 2 Definition For the purposes of this standard, the following definition applies: elongation at break The increase in length of the adhesive tape at the time of breaking as a percentage of the original length. 3 Principle The method con
24、sists of holding the adhesive tape vertically by the two clamps of a tensile testing machine. The elongation test is carried out until the adhesive tape breaks. 4 Apparatus Tensile testing machine, with the following characteristics: the force shall be indicated with a maximum error of 2 %; the spee
25、d of the moveable clamp shall be 300 mm/min 30 mm/min; the scale shall be such that the readings obtained are between 15 % and 85 % 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 swi
26、ng freely. 5 Test sample and test pieces Condition the sample roll for 24 hours at 23 C 2C and 50 % 5 % relative humidity. Discard the 3 outer turns of adhesive tape from the roll. Take from each roll 5 test pieces. Each test piece shall be 200 mm long and the same width as the adhesive tape. For wi
27、dths 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 shall be carried out at the standard conditions of 23 C 2 C and 50 % 5 % relative humidity. 6.2 Remove the test pieces radially f
28、rom the roll at an approximate speed of 300 mm/s, then condition for a further 2 h in the standard test conditions in order to remove all strain and distortion due to unwinding. 6.3 Set the clamps 100 mm apart. Clamp the test piece firmly so that the longitudinal axis is vertical and in line with th
29、e 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 mm/min. Reject all test pieces which break within 5 mm of the clamps and carry out sufficient further tests to obtain 5 test pieces which
30、 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 adhesive tape between the clamps when the adhesive tape breaks. Express the results as a percentage to the nearest whole number. Arra
31、nge the five readings in ascending numerical order. Take the central value (median) as the elongation at break of the adhesive tape under test. Because the results obtained with different tensile testing machines (pendulum or electronic) may not be directly comparable, the type of machine used shall
32、 be included in the test report. 8 Test report 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 result obtained; f)
33、 any operation not specified in this European Standard which can influence the results.BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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