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1、BRITISH STANDARD BS EN 13780:2003 Touch and close fasteners Determination of longitudinal shear strength The European Standard EN 13780:2003 has the status of a British Standard ICS 61.040 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
2、 EN 13780:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 13 February 2004 BSI 13 February 2004 ISBN 0 580 43416 8 National foreword This British Standard is the official English language version of EN 13780:2003. It supersedes BS 7271:1
3、990, which will be withdrawn in April 2004. The UK participation in its preparation was entrusted to Technical Committee TCI/66, Apparel, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British S
4、tandards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.
5、This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible i
6、nternational/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. Summary of pages This document comprises a front cover, an inside front cover, the
7、EN title page, pages 2 to 9 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:19 GMT+00:00 2006, Uncontrolled Copy,
8、(c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13780 February 2003 ICS 61.040 English version Touch and close fasteners - Determination of longitudinal shear strength Fermetures auto-agrippantes - Dtermination de la rsistance la traction longitudinale Haftverschlsse - Bestimmung der Ln
9、gsscherfestigkeit This European Standard was approved by CEN on 12 December 2002. 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
10、bibliographical references concerning such national standards may be obtained on application to the Management Centre 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
11、 of a CEN member into its own language and notified to the Management Centre 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, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta
12、, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2003 CENAll rights of exploitation in any form and by
13、any means reserved worldwide for CEN national Members. Ref. No. EN 13780:2003 E Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13780:2003 (E) 2 Contents page Foreword3 1Scope 4 2Normative references 4 3Terms and definitions4 4Principle4
14、5Apparatus .4 6Test specimens5 7Conditioning.5 8Procedure .6 9Calculation and expression of results.7 10Test report 8 Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13780:2003 (E) 3 Foreword This document (EN 13780:2003) has been prepare
15、d by Technical Committee CEN/TC 248 “Textiles and textile products“, the secretariat of which is held by BSI. 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 2003, and conflicting national
16、standards shall be withdrawn at the latest by August 2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hu
17、ngary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13780:2003 (E) 4 1 Scope This European Standard
18、 specifies a method for determining the longitudinal shear strength of a touch and close fastener. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text
19、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 edition of the publication referred to applies
20、(including amendments). EN 12240, Touch and close fasteners - Determination of the overall and effective widths of tapes and the effective width of a closure. EN 20139, Textiles - Standard atmospheres for conditioning and testing (ISO 139:1973). EN ISO 7500-1, Metallic materials - Verification of st
21、atic uniaxial testing machines Part 1: Tension/compression testing machines (ISO 7500-1:1999). 3 Terms and definitions For the purposes of this European Standard, the following terms and definitions apply: 3.1 longitudinal shear strength maximum force per unit effective area required to separate the
22、 two tapes forming the specified closure in a shearing action under the specified conditions of test 3.2 effective area of a closure effective area of a closure is the product of the effective width of a closure and the length of a closure 4 Principle Mated component tapes of a touch and close faste
23、ner are separated at a constant rate such that the separation occurs progressively along the closure in a direction parallel to the length of the tapes forming the closure and in the plane of the closure. 5 Apparatus 5.1Constant rate of extension tensile testing machine, as specified in EN ISO 7500-
24、1, connected to a computer, via a suitable interface, capable of recording data at a rate of at least 20 points per second. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13780:2003 (E) 5 5.2Metal roller, made of phosphor-bronze, with a
25、diameter of (100 2) mm (see Figure 2), which shall be selected in accordance with Table 1. Table 1 Selection of metal roller Effective width of closure W as determined by EN 12240 mm Metal roller mass kg W 12,01,0 0,1 12,0 52,010,0 0,1 NOTEThe most important parameters for the roller are its diamete
26、r and mass. Its width should be chosen in accordance with the specific density of the phosphor-bronze used in its manufacture. 5.3Set of forks with a handle (see Figure 3) which engages the metal roller (5.2) and allows the roller to be moved without any extra down force being applied (see Figure 4)
27、. 6 Test specimens Cut 4 test specimens of both male and female components at least 100 mm long and mark each with an “X“ at one end and a “Y“ at the other end, such that each test specimen of like tape is marked identically. 7 Conditioning Condition the test specimens for a minimum of 24 h in accor
28、dance with the standard temperate atmosphere for testing as specified in EN 20139. The closing of the test specimens and the testing of the touch and close fasteners shall also take place under these conditions. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:19 GMT+00:00 2006, Uncontro
29、lled Copy, (c) BSI EN 13780:2003 (E) 6 8 Procedure 8.1 Combinations of closure Make 4 closures in total, 1 closure each being made as per the combinations shown in Figure 1. Key 1 Combination A 2Combination B 3Combination C 4Combination D Figure 1 Longitudinal shear strength combinations of closure
30、8.2 Method of closure Select the length of overlap in accordance with the following table: 50 mm for fastener systems comprised of woven hook tape and woven loop tape; 20 mm for fastener systems comprised of either woven or knitted mushroom tape and knitted loop tape; 20 mm for fastener systems comp
31、rised of a plastic male tape and knitted loop tape; 50 mm for fastener systems not listed here above, but in the event that tensile failure occurs to either of the tapes during testing, the overlap should be reduced to 20 mm. Make each closure as follows: Place the male tape on a flat surface with t
32、he pile uppermost and then place the female tape on top with the pile facing downwards so that only the selected length of overlap together with the overall width make a closure, using minimal hand pressure. Traverse the metal roller (5.2) at a rate of approximately 200 mm/s along the tapes in one d
33、irection, then immediately traverse in the opposite direction, then turn the mating tapes over. Repeat the procedure until the roller has traversed the mating tapes 5 times in each direction i.e. a total of 10 times. Take care that the centre of gravity of the roller does not deviate from the centre
34、 line of the tapes during this operation. Take care that the roller covers the entire width of the mating tapes. NOTE The tapes are turned over to minimise curvature. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13780:2003 (E) 7 8.3 Co
35、nduct the test for each closure Set up the tensile testing machine (5.1) such that the jaws are 100 mm apart. Mount the combined test specimen into the jaws of the tensile testing machine (5.1) such that the free end of the female tape is in the upper jaw and the free end of the male tape is in the
36、lower jaw, taking care to align the test specimen in order that the force applied is uniformly distributed across the width of the closure. Set the tensile machine in motion at a constant rate of jaw separation of (100 10) mm/min. Record force against jaw separation, until either the closure has bee
37、n separated or one of the tapes has undergone tensile failure. Record the mode of failure. 9 Calculation and expression of results 9.1 In the event that a tensile failure occurs, then the breaking force shall be considered as the force required to shear the closure. 9.2Calculate the effective area o
38、f closure, by multiplying the effective width of the closure by the length of the overlap and express the result in square centimetres. 2 100 cm WL A eo e =(1) 9.3For each combination calculate the longitudinal shear strength by dividing the maximum force required to shear the closure by the effecti
39、ve area of the closure and express the result in newtons per square centimetre. 2 /cmN A F S e i i = (2) 9.4Calculate the mean longitudinal shear strength of the closure by calculating the arithmetic mean of the longitudinal shear strengths of the 4 combinations. Notes to the above calculations : We
40、 = effective width of the closure (mm) Lo = length of overlap (mm) Ae = effective area of the closure (cm2) Fi = individual force required to shear a closure (N) Si = individual longitudinal shear strength (N/cm2) 9.5Express the minimum longitudinal shear strength of the closure of the 4 combination
41、s. 9.6Express the maximum longitudinal shear strength of the closure of the 4 combinations. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13780:2003 (E) 8 10 Test report Report the following information: a) number and date of this Europ
42、ean Standard ; b) date of the test ; c) identification of the touch and close fastener tapes ; d) length of the overlap ; e) the minimum and maximum longitudinal shear strengths for the 4 combinations, and the mean longitudinal shear strength of the closure ; f) the modes of failure ; g) any deviati
43、on from this standard and any incident likely to have affected the results. Dimensions in millimetres 1 9,5 9,5 100 Key 1 Choose roller width to meet specified mass Figure 2 Metal roller Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 137
44、80:2003 (E) 9 Dimensions in millimetres 2 3 1 100100 70 10 10 10 10 Key 1 Handle 2 Forks 3 Space between the forks to be 2 mm greater than the roller width Figure 3 Set of forks with a handle Figure 4 Rolling mechanism for touch and close fasteners Licensed Copy: sheffieldun sheffieldun, na, Sun Oct
45、 29 12:43:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13780:2003 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the internationa
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