1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 16177:2012Footwear Resistance to crackinitiation and growth Beltflex methodBS EN ISO 16177:2012 BRITISH STANDARDNational forewordThis British Standard is the UK impleme
2、ntation of EN ISO16177:2012.The UK participation in its preparation was entrusted to TechnicalCommittee TCI/69, Footwear, leather and coated fabrics.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the n
3、ecessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 74402 0ICS 61.060Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was
4、published under the authority of theStandards Policy and Strategy Committee on 31 October 2012.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 16177 October 2012 ICS 61.060 English Version Footwear - Resistance to crack initiation and gro
5、wth - Belt flex method (ISO 16177:2012) Chaussures - Rsistance la fissuration et sa croissance - Mthode de flexion de la ceinture (ISO 16177:2012) Schuhe - Bestndigkeit gegen Risserzeugung und Risswachstum - Verfahren mit flexiblem Band (ISO 16177:2012) This European Standard was approved by CEN on
6、30 September 2012. 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 references concerning such national standards m
7、ay be obtained on application to the CEN-CENELEC 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 of a CEN member into its own language and notified
8、 to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Icelan
9、d, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre:
10、Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 16177:2012: EBS EN ISO 16177:2012EN ISO 16177:2012 (E) 3 Foreword This document (EN ISO 16177:2012) has been prepared by Technical Committee
11、 CEN/TC 309 “Footwear”, the secretariat of which is held by AENOR, in collaboration with Technical Committee 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 April 2013, and
12、conflicting national standards shall be withdrawn at the latest by April 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. Accordi
13、ng to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, G
14、reece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN ISO 16177:2012ISO 16177:2012(E)ForewordISO (the International Organization for Standardi
15、zation) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to b
16、e represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standar
17、ds are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Interna
18、tional Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 16177 was p
19、repared by the European Committee for Standardization (CEN) Technical Committee CEN/TC 309, Footwear, in collaboration with ISO Technical Committee ISO/TC 216, Footwear, in accordance with the agreement on technical cooperation between ISO and CEN (Vienna Agreement). ISO 2012 All rights reserved iii
20、BS EN ISO 16177:2012BS EN ISO 16177:2012Footwear Resistance to crack initiation and growth Belt flex method1 ScopeThis International Standard specifies a test method for determining the resistance of a component or material to crack initiation and growth due to repeated flexing. The method is mainly
21、 applicable to outsoles of footwear but may also be used with certain other flexible components.2 Apparatus and materials2.1 Flexing machine with:2.1.1 Free wheeling, slightly crowned flexing roller, with a width of (170 20) mm and for high performance soles, diameter at its centre (60,0 0,5) mm,dia
22、meter at its ends (57 1) mm;NOTE This roller will normally only be used for footwear which is expected to be subjected to abnormally high flexing demands. for typical sole units,diameter at its centre (90,0 0,5) mm,diameter at its ends (87 1) mm; for soles with a thickness greater than 15 mm,diamete
23、r at its centre (120,0 0,5) mm,diameter at its ends (117 1) mm.2.1.2 Driven, slightly crowned roller, with a diameter of (225 5) mm and a width of (170 20) mm.2.1.3 Flexible continuous belt of cotton canvas of length (1 930 50) mm and width (140 5) mm which passes over the two rollers (2.1.1) and (2
24、.1.2). The cotton canvas is 2-ply 100 % cotton belting having a mass per unit area of (500 25) g/m2and an extension at break along the belt of (14 2) % at a breaking force of (2 000 200) N. The corresponding across-the-belt values are (14 2) % and (750 50) N.2.1.4 Means of driving the larger roller
25、(2.1.2) at a speed of (247 20) r/min so that the belt (2.1.3) completes (90 8) flexing cycles per minute.2.1.5 Method of counting the number of cycles completed by the belt (2.1.3).2.2 Polyurethane adhesive system to bond the test specimen to the surface of the belt (2.1.3), consisting of:2.2.1 Pre-
26、reacted PU adhesive.2.2.2 Single-component PU adhesive.INTERNATIONAL STANDARD ISO 16177:2012(E) ISO 2012 All rights reserved 1BS EN ISO 16177:2012ISO 16177:2012(E)2.3 Cutting device, such as a sharp knife or scalpel, capable of cutting test specimens.2.4 Smooth-surfaced hand tool for the application
27、 of localized pressure by a rubbing action.NOTE A rapid acting platen press with the capability of applying a pressure of (500 50) kPa over the whole area of the test specimen may be suitable for some types of sole specimen.2.5 Means of heating adhesive film, for activating adhesive film or removing
28、 samples from the belt. This can be achieved by using a hot air gun or an oven set at 50 C. Heat should be applied in short bursts to prevent partial melting of soles.NOTE Commercial equipment for heat reactivating outsoles and uppers in production is suitable.2.6 Method of checking that the tempera
29、ture of the adhesive film is within the range between 80 C and 90 C. Heat sensitive crayons, such as Tempilstik1), are suitable, preferably with a melting temperature of 83 C.2.7 Primers.2.7.1 Vulcanized and thermoplastic rubber test specimens. A halogenation primer for rubber will be necessary for
30、producing satisfactory bonds.2.7.2 EVA test specimens. An EVA primer will be necessary for producing satisfactory bonds.2.8 Device, such as a T square, with an internal angle of (90 1).2.9 Device for checking whether the depth of a crack is greater than 1,5 mm. A thin strip of metal with a length sc
31、ale or stepped thickness is suitable.3 PrincipleA test specimen is bonded with a strong adhesive to a continuous belt, which is driven around two rollers. The spacing and radius of the rollers is such that the test specimen is repeatedly subjected to a short period of rapid flexing followed by a lon
32、ger period unflexed as the belt passes around the rollers, which simulates the wear conditions of a footwear outsole. The specimen is flexed for a fixed number of cycles and the number of cracks that form and their severity is recorded.4 Preparation of test specimens4.1 If the test specimen has been
33、 moulded, then the time between moulding and testing should be at least 48 h.4.2 If the test specimen is an outsole attached to a made item of footwear: cut off the upper just above the level of the insole; remove the insole; scour or rough away the lasted margin of the upper, taking care not to dam
34、age the outsole; check for the presence of a metallic penetration-resistant insert.Do not use heat to soften the bond of the outsole to the upper as this may damage the outsole.1) Tempilstik is an example of a suitable product available commercially. This information is given for the convenience of
35、users of this International Standard and does not constitute an endorsement by ISO of this product.2 ISO 2012 All rights reservedBS EN ISO 16177:2012ISO 16177:2012(E)4.3 Mark the toe-heel centre line on the outer surface of the outsole as follows.4.3.1 Place the points A and B (see Figure 1) on the
36、inside edge of the outsole against the longer edge of the T square (2.8) and the toe against the shorter edge.Key1 cut as described in 4.4Figure 1 Marking and cutting of test specimen (see also Figure 42 of ISO 20344:2011)4.3.2 Make a mark on the toe at the point that is in contact with the shorter
37、edge of the T square.4.3.3 Repeat the procedure described in 4.3.1 and 4.3.2 for the heel of the test specimen.4.3.4 Mark a line between the point at the heel and the point at the toe, XY in Figure 1.4.4 Cut off the heel and part of the waist portion so as to leave 10mm to 20 mm length of the waist
38、on the forepart (see Figure 1).4.5 If the edge of the forepart on the reverse side is cupped or includes any form of rand or imitation welt, scour this off until this surface is flat. Do not remove ribs in the central section of the outsole on the reverse side.4.6 For outsoles which are thicker than
39、 15 mm, reduce the thickness to 15 mm before preparation in order to ensure reasonable flexibility. In such cases, it will be necessary to use the 120 mm diameter flexing roller (2.1.1). Outsoles containing a metal insert are also tested using the 120 mm roller.NOTE To help prevent thick soles peeli
40、ng from the belt during the test, it is acceptable to taper the thickness at the extreme ends of the specimen (toe and waist) by scouring material away from the outside surface for a length of not more than 2,5 cm from each end, which will alleviate the flexing stress on the bond.4.7 Prepare the rev
41、erse side of the forepart for bonding as follows.4.7.1 Cellular polyurethane outsoles: lightly scour the whole of the surface.4.7.2 Vulcanized and microcellular rubber: lightly scour the whole of the surface, then scrub it with a halogenation primer for rubber (2.7) using a stiff brush. Leave to dry
42、 for between 15 min and 8 h before applying any adhesive.4.7.3 Thermoplastic rubber: lightly coat the whole of the reverse surface with a halogenation primer for rubber (2.7) using a soft brush. Leave to dry for between 30 min and 8 h before applying any adhesive.4.7.4 Microcellular EVA: lightly sco
43、ur the whole of the reverse surface, then coat it with an EVA primer (2.7) using a soft brush. Leave to dry for between 30 min and 8 h before applying any adhesive. ISO 2012 All rights reserved 3BS EN ISO 16177:2012ISO 16177:2012(E)4.7.5 PVC and solid (thermoplastic) PU: wipe the whole of the revers
44、e surface with butan-2-one (methyl ethyl ketone, MEK). Leave to dry for between 15 min and 1 h before applying any adhesive.5 Procedure5.1 In order to prepare the belt for test, proceed as follows.5.1.1 Cut a strip of cotton canvas fabric (140 5) mm (2 000 20) mm, and mark its centre on both sides.5
45、.1.2 Draw two lines across the strip of fabric (see Figure 2): at 90 to the longer edges of the strip; one line (930 3) mm on either side of the centre of the strip; one line on the upper surface and the other on the lower surface.Dimensions in millimetresNOTE Line AB should be drawn on the opposite
46、 surface to line XY.Figure 2 Diagram for marking lines on the belt5.1.3 A belt used for previous tests can be reused provided that it is not excessively frayed and there is a sufficiently large unused area for the new test specimens.5.2 Place the specimens to be tested (see Figure 3) onto the belt s
47、o that: their wearing surfaces are uppermost; they are evenly spaced between the two lines (5.1.2); they are no closer than 50 mm to each other or the lines (5.1.2); they are centred across the width of the belt; their toes are pointing in the same direction; their centre line (4.3.4) is parallel to
48、 the longer edge of the belt; they do not cover any previously used areas of the belt.4 ISO 2012 All rights reservedBS EN ISO 16177:2012ISO 16177:2012(E)Dimensions in millimetresKey1 adhesive applied to the same surface as line AB2 adhesive applied to the same surface as line XYNOTE AB and XY are on
49、 opposite surfaces.Figure 3 Diagram for placing the specimens on the belt5.3 Mark the perimeter of each test specimen on the belt.5.4 Apply the pre-reacted adhesive (2.2.1) to the surface of the belt over: the whole area of each of the marked specimen positions; the area between the lines (5.1.2) and the ends of the belt (on opposite surfaces at one end to the other).5.5 Apply a coat of the PU adhesive (2.2.2) to: the prepared surface of each test specimen; the areas of
