1、BRITISH STANDARD BS EN ISO 22776:2004 Footwear Test method for accessories: Touch and close fasteners Shear strength before and after repeated closing The European Standard EN ISO 22776:2004 has the status of a British Standard ICS 61.060 BS EN ISO 22776:2004 This British Standard was published unde
2、r the authority of the Standards Policy and Strategy Committee on 6 January 2005 BSI 6 January 2005 ISBN 0 580 45208 5 National foreword This British Standard is the official English language version of EN ISO 22776:2004. It is identical with ISO 22776:2004. The UK participation in its preparation w
3、as entrusted to Technical Committee TCI/69, Footwear and leather, 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 Standards which implement international or European publications referred
4、 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. This publication does not purport to include all the necessary provision
5、s 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 international/European committee any enquiries on the interpretation, or
6、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 EN ISO title page, pages 2 to 12, an inside back cover and a back cover.
7、 The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO22776 December2004 ICS61.060 Englishversion FootwearTestmethodsforaccessories:Touchandclose
8、fastenersShearstrengthbeforeandafterrepeatedclosing (ISO22776:2004) ChaussuresMthodesdessaipouraccessoires: fermeturesautoagrippantesRsistancelatraction avantetaprsunusagerpt(ISO22776:2004) SchuhePrfverfahrenfrZubehr:Haftverschlsse ScherfestigkeitvorundnachwiederholtemSchlieen(ISO 22776:2004) ThisEu
9、ropeanStandardwasapprovedbyCENon23August2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtai
10、nedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial versions
11、. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMM
12、ITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO22776:2004:EEN ISO 22776:2004 (E) 2 Contents Page Foreword3 1 Scope
13、 4 2 Normative references 4 3 Terms and definitions .4 4 Principle4 4.1 Shear strength4 4.2 Shear strength after repeated opening and closing 4 5 Apparatus .5 6 Test specimens8 7 Conditioning.8 8 Procedure .9 9 Calculation and expression of results.11 10 Test report 11 Annex ZA (normative) Normative
14、 references to International publications with their corresponding European publications12 EN ISO 22776:2004 (E) 3Foreword This document (EN ISO 22776:2004) has been prepared by Technical Committee CEN/TC 309 “Footwear“, the secretariat of which is held by AENOR, in collaboration with Technical Comm
15、ittee ISO/TC 216 “Footwear“. 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 June 2005, and conflicting national standards shall be withdrawn at the latest by June 2005. According to the CEN/CENEL
16、EC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta
17、, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN ISO 22776:2004 (E) 4 1 Scope This document specifies a test method for determining the longitudinal shear strength of touch and close fasteners before and after repeated use. 2 Normative re
18、ferences The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12222, Footwear - Standard atmosphere
19、s for conditioning and testing of footwear and components for footwear EN 12240, Touch and close fasteners Determination of the overall and effective widths of tapes and the effective width of a closure EN ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tensio
20、n/compression testing machines Verification and calibration of the force-measuring system (ISO 7500-1:2004) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 longitudinal shear strength maximum force per unit effective area required to separate
21、 the two tapes forming the specified closure in a shearing action under the specified conditions of test 3.2 effective width width of the pile at 90 to the length of the tape and which does not include the selvedge 3.3 effective area of a closure product of the effective width of a closure and the l
22、ength of a closure 4 Principle 4.1 Shear strength Mated component tapes of a touch and close fastener are separated at a constant rate along the closure in a direction parallel to the length of the tapes forming the closure and in the plane of the closure. 4.2 Shear strength after repeated opening a
23、nd closing A touch and close fastener is repeatedly opened and closed a standard number of times by a machine. The shear strength is then measured by repeating the test described in 4.1. EN ISO 22776:2004 (E) 5 5 Apparatus 5.1 A tensile testing machine complying with the requirements of EN ISO 7500-
24、1 to an accuracy corresponding to class 2, and with the following: 5.1.1 A jaw separation rate of 100 mm/min 10 mm/min. 5.1.2 The means of producing a continuous record of force throughout the test. 5.2 A roller device with a roller (see Figure 1) of diameter 100 mm 5 mm capable of applying a force
25、of 1,0 N 0,1 N per millimetre width of the test specimen. This is to close the fastener under a standard pressure. 5.3 Fork with a handle (see Figure 2) which engages the roller (5.2) and allows it to be moved without any extra down force being applied (see Figure 3). Dimensions in mm Figure 1 Rolle
26、r EN ISO 22776:2004 (E) 6 Dimensions in mm Key 1 Handle 2 Forks 3 Space between the forks to be 2 mm greater than the roller width Figure 2 Fork with a handle Figure 3 Rolling mechanism for touch and close fasteners EN ISO 22776:2004 (E) 7 5.4 A touch and close cycling machine (see Figure 4) with: 5
27、.4.1 Two circular drums of minimum width 70 mm, one of diameter 160,0 mm 0,5 mm and the other diameter 162,5 mm 0,5 mm. Each drum has a single slot of length 55 mm 2 mm across its width to hold the free ends of the specimen fastener. The drums are mounted next to each other with their axes parallel.
28、 5.4.2 A means of rotating the smaller of the two drums at a rate of 60 rev/min 5 rev/min with the direction of rotation being reversed every 30 s 5 s. The larger of the two drums rotates freely and is driven by physical contact with the smaller drum via the test specimen. 5.4.3 A means of applying
29、a force of 1,0 N 0,1 N between the two drums for every 1 mm width of the test specimen. 5.4.4 A method of counting the total number of rotations of the smaller of the two drums regardless of the direction of rotation. Key 1 Idling drum (diameter 162.5 mm 0,5 mm) 2 Hook tape 3 Driven drum (diameter 1
30、60 mm 0,5 mm) 4 Loop tape F Force between drums = 1 N for every millimetre of effective width of fastener X Drum Figure 4 Touch and close fastener cycling machine EN ISO 22776:2004 (E) 8 6 Test specimens 6.1 Shear strength Cut four test specimens of both hook and loop components at least 100 mm long
31、 and mark each with a “1” at one end and a “2” at the other end (see Figure 5). 6.2 Shear strength after repeated opening and closing 6.2.1 Cut one piece of length 540 mm 10 mm from both the hook and loop tapes. 6.2.2 Mark four test specimens, each of length 100 mm 5 mm on the central portion of bot
32、h tapes. 6.2.3 Mark each 100 mm test specimen section with a “1” at one end and a “2” at the other (see Figure 5). Do not cut the test specimens out at this stage. Key A Hook tape B Loop tape C Spare tape X Specimen Figure 5 Marking and cutting of test specimens 7 Conditioning The test specimens sha
33、ll be conditioned in accordance with the standard atmosphere specified in EN 12222 for a minimum of 24 h prior to the test. The closing of the test specimens and the testing shall also take place under these conditions. EN ISO 22776:2004 (E) 9 8 Procedure 8.1 Shear strength 8.1.1 Measure the effecti
34、ve width (3.2), W e , of both a hook and loop tapes (see 6.1), according to EN 12240, to an accuracy of 0,5 mm and use the smaller of these two values as the width of all the assembled fasteners. 8.1.2 Assemble (in accordance with the combinations of closure shown in Figure 6) the test specimens (se
35、e 6.1) as follows: 8.1.2.1 Select the length of overlap, L o , in accordance with the following: 50 mm for fastener systems (see Figure 6) 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
36、fastener systems comprised of a plastic hook 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. 8.1.2.2 Place the hook tape on a flat surface with th
37、e pile uppermost and then place the loop 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. 8.1.3 Traverse the roller device (5.2) at a rate of approximately 200 mm/s along the tapes in o
38、ne direction, then immediately traverse in the opposite direction, then turn the mating tapes over. NOTE The tapes are turned over to minimise curvature. 8.1.4 Repeat the procedure until the roller has traversed the mating tapes five times in each direction, i.e. a total of ten times, taking care th
39、at: the centre of gravity of the roller does not deviate from the centre line of the tapes during this operation; the roller covers the entire width of the mating tapes. 8.1.5 Conduct the test for each closure as follows: 8.1.5.1 Set up the tensile testing machine (5.1) such that the jaws are 100 mm
40、 apart. 8.1.5.2 Mount the combined test specimen (see 8.1) into the jaws of the tensile testing machine (5.1) such that the free end of the loop tape is in the upper jaw and the free end of the hook tape is in the lower jaw, taking care to align the test specimen in order that the force applied is u
41、niformly distributed across the width of the closure. 8.1.5.3 Set the tensile machine in motion at a constant rate of jaw separation of 100 mm/min 10 mm/min. Record the maximum force against jaw separation, F i , until either the closure has been separated or one of the tapes has undergone tensile f
42、ailure. If failure occurs, record the mode of failure. In the event that a tensile failure occurs, then the breaking force shall be considered as the force required to shear the closure. 8.2 Shear strength after repeated opening and closing 8.2.1 Measure the effective width of the fasteners by using
43、 the procedure in 8.1.1. EN ISO 22776:2004 (E) 10 8.2.2 Attach the length of loop tape (see 6.2) round the circumference of the smaller drum (5.4.1) so that its backing surface is against the drum. Tuck the free ends of the tape into the slot in the drum. 8.2.3 Attach the length of hook tape (6.2) r
44、ound the circumference of the larger drum (5.4.1) so that its backing surface is against the drum. Tuck the free ends of the tape into the slot in the drum. 8.2.4 Bring the two drums together so that the hook and loop tapes are in contact with each other, and apply a force, in N, between the drums w
45、hich is numerically equal to, or within 1 N of the effective width of the fastener, in mm. 8.2.5 Rotate the smaller drum at a speed of 60 rev/min 5 rev/min for 5 000 revolutions. 8.2.6 Remove both the hook and loop tapes from the drums and cut each tape into four test specimens as shown in Figure 5.
46、 8.2.7 Carry out the procedure in 8.1.1 to 8.1.4 to assess the shear strength of the fasteners after repeated opening and closing. Key A Combination A B Combination B C Combination C D Combination D Figure 6 Longitudinal shear strength combinations of closure EN ISO 22776:2004 (E) 11 9 Calculation a
47、nd expression of results 9.1 Shear strength 9.1.1 Calculate the effective area of closure, A e , in cm 2 , using the following equation: 100 W L A e o e = where L ois the length of overlap, in mm; W eis the effective width of the closure, in mm. 9.1.2 Calculate the longitudinal shear strength, S i ,
48、 in N/cm 2 , using the following equation: e i i A F S = where F iis the maximum force required to shear a closure, in N; A eis the effective area of the closure, in cm 2 . 9.1.3 Express the minimum and maximum longitudinal shear strength, in N/cm 2 , of the closure of the four combinations and calculate the mean longitudinal shear strength, in N/cm 2 , of the closure by calculating the arithmetic mean of the longitudinal shear strengths of the four combinations. 9.2 Shear st
