1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 10765:2010Footwear Test methodfor the characterization ofelastic materials Tensileperformance (ISO 10765:2010)BS EN ISO 10765:2010 BRITISH STANDARDNational forewordThis
2、 British Standard is the UK implementation of EN ISO10765:2010.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 do
3、es not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 63030 9ICS 61.060Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of th
4、eStandards Policy and Strategy Committee on 31 July 2010Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10765 July 2010 ICS 61.060 English Version Footwear - Test method for the characterization of elastic materials - Tensile performance
5、(ISO 10765:2010) Chaussures - Mthode dessai de caractrisation des matriaux lastiques - Performances de traction (ISO 10765:2010) Schuhe - Prfverfahren zur Charakterisierung elastischer Materialien - Gebrauchsverhalten unter Zugbeanspruchung (ISO 10765:2010) This European Standard was approved by CEN
6、 on 9 June 2010. 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 may
7、 be obtained on application to the CEN 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 to the CE
8、N 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
9、Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploita
10、tion in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 10765:2010: EBS EN ISO 10765:2010EN ISO 10765:2010 (E) 3 Foreword This document (EN ISO 10765:2010) has been prepared by Technical Committee CEN/TC 309 “Footwear”, the secretariat of which is held by AENOR
11、, 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 January 2011, and conflicting national standards shall be withdrawn at the latest
12、 by January 2011. 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. According to the CEN/CENELEC Internal Regulations, the national stan
13、dards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
14、Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN ISO 10765:2010ISO 10765:2010(E) ISO 2010 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member
15、 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 be represented on that committee. International organizations, governmental
16、 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 Standards are drafted in accordance with the rules given in the ISO/IEC Directiv
17、es, 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 International Standard requires approval by at least 75 % of the member bodies
18、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 10765 was prepared by Technical Committee ISO/TC 216, Footwear and by Technical C
19、ommittee CEN/TC 309, Footwear in collaboration, in accordance with the Vienna Agreement. BS EN ISO 10765:2010BS EN ISO 10765:2010INTERNATIONAL STANDARD ISO 10765:2010(E) ISO 2010 All rights reserved 1Footwear Test method for the characterization of elastic materials Tensile performance 1 Scope This
20、International Standard specifies a test method for the determination of some typical parameters of elastics for footwear using the strength/elongation graph, which is obtained from the tensile strength test. This method is applicable to any elastic material used for footwear. 2 Normative references
21、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. ISO 18454, Footwear Standard atmospheres for cond
22、itioning and testing of footwear and components for footwear 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 elastic tape, cord or fabric containing rubber or a similar substance allowing it to stretch and return to its original shape NOTE Ge
23、nerally elastic materials are used in upper construction in the quarters or in the straps to hold the shoe on the foot. 3.2 elastic gradient slope of the straight part of the graph, with reference to width 3.3 modulus strength needed to stretch an elastic band until a given extension, with reference
24、 to width 3.4 limit of useful extension extension value on the point of the graph where the slope is five times bigger than the average at the initial part of the curve NOTE It is the point at which the stretching together of the textile material threads and the rubber threads that form elastic begi
25、ns. BS EN ISO 10765:2010ISO 10765:2010(E) 2 ISO 2010 All rights reserved3.5 maximum resistance extension extension at the maximum load point 3.6 extension at break extension at the moment of rupture of the material 4 Apparatus and materials 4.1 Tensile testing machine, which can provide crosshead sp
26、eeds of (100 20) mm/min and (50 10) mm/min and which permits autographic recording of the load/extension trace. 4.2 Steel ruler, accurate to the nearest 0,5 mm. 4.3 Sewing machine, with a round point needle metric size 90s or 70s, a nylon or polyester thread (approximately tex 17/3) and operating at
27、 6 stitches/cm. 4.4 Polyurethane (PU) coagulated woven fabric, of thickness of approximately 1 mm. 5 Sampling and conditioning 5.1 Sampling 5.1.1 The standard test piece dimensions are shown in Figure 1. 5.1.2 In general the testing length is 100 mm, however if the available material is limited, thi
28、s length can be reduced to 50 mm. 5.1.3 Cut three test pieces of elastic material measuring at least 150 mm in length. Draw two lines, exactly 90 mm apart on each of the test pieces, and so that none of the lines is less than 30 mm from the test piece ends. If shorter test pieces are used, they shal
29、l have a minimum length of 80 mm and the lines must be drawn 40 mm apart, so that none of them is less than 20 mm from the ends. 5.1.4 Cut 12 rectangle pieces of coated fabric (4.4), 50 mm wide and the same length as the width of elastic test piece, plus an extra 30 mm. On six of them, draw a parall
30、el line on the longest side at 5 mm from the edge. 5.1.5 Place each marked rectangle piece with the coated side facing upwards, aligned with an unmarked rectangle, with the coating facing downwards. Between these rectangles introduce the elastic test piece so that the line drawn on the elastic align
31、s exactly with the edge of the textile rectangle and about 15 mm of this protrudes from either side of the elastic. 5.1.6 Holding the three pieces of material in this position, sew along the marked line on the coated fabric (4.4). On reaching the edge, turn the sample and sew parallel to and 5 mm fr
32、om the previous seam. Double-sided tape can be used when preparing the test piece to avoid any of the materials being displaced whilst they are being sewn. 5.1.7 Likewise, sew the other two rectangles on the other end of the elastic test piece. 5.1.8 Repeat the procedure in order to prepare the othe
33、r two samples. BS EN ISO 10765:2010ISO 10765:2010(E) ISO 2010 All rights reserved 3Dimensions in millimetres Key 1 stitch line 2 coated fabric 3 stitching 4 line drawn on elastic 5 elastic aIn the case of shorter test pieces the lines between the two samples are spaced at 40 mm. Figure 1 Dimensions
34、of a standard test piece in millimetres 5.2 Conditioning Samples and test pieces shall be conditioned for at least 24 h at (23 2) C and (50 5) % relative humidity (RH) before testing, in accordance with ISO 18454. 6 Procedure 6.1 Using the steel ruler (4.2), measure the distance between the seams of
35、 the elastic test piece ends, 5 mm from the edges of the coated material. Measure this distance twice and record the average length, L. Furthermore, measure the sample width at three different points, to the nearest 1 mm; record the average of the three values, b. 6.2 Calibrate the tensile testing m
36、achine (4.1) to a force range between 100 N and 500 N and a speed of separation of the jaws of (100 20) mm/min. The recorder speed should be equal to the crosshead speed. If the test pieces are 50 mm long, the crosshead speed shall be (50 10) mm/min and if possible the recorder speed shall be twice
37、the jaws separation speed so as to improve precision of extension measurements on the graph. BS EN ISO 10765:2010ISO 10765:2010(E) 4 ISO 2010 All rights reserved6.3 Clamp one of the test pieces symmetrically in the jaws of the tensile testing machine so that the edge of the jaws aligns exactly with
38、the materials seam, at 5 mm from the edge. If the edges of the material protrude from the jaws and there is not enough space, they may be cut off. 6.4 Keep the tensile testing machine switched on until the elastic test piece breaks. 6.5 Repeat the procedure for the other test pieces. 7 Expression of
39、 results 7.1 General The strength/elongation graph shown in Figure 2 was obtained from the elastic material tensile strength test. Key X percent extension Y force, in newtons a Elastic gradient (EG). Figure 2 Graph showing the relationship between load and percentage extension for the tensile streng
40、th of elastic materials 7.2 Modulus 7.2.1 20 % modulus Mark the point with the coordinate x = 20 % on the graph. The coordinate, y, of this point corresponds to the load needed for reaching said extension, y20. Divide this value by the width of the test piece, b, in centimetres, to obtain the 20 % m
41、odulus using Equation (1). 20 % modulus = 20yb(1) BS EN ISO 10765:2010ISO 10765:2010(E) ISO 2010 All rights reserved 57.2.2 50 % modulus This is obtained in the same manner as in 7.2.1 but in this case, mark the point on the graph with the coordinate x = 50 % (y50) using Equation (2). 50 % modulus =
42、 50yb(2) In all cases calculate the average of three test pieces. 7.3 Elastic gradient (EG) The EG is calculated by dividing the slope of the straight line (straight slope) of the graph by the width of the sample using Equation (3). EG = straight slopeb(3) where straight slope = ()()00yyxx; (x,y) (x
43、0,y0) are any two points on the straight line; b is the width of the sample, in centimetres. The final result shall be the arithmetic mean of three test pieces. 7.4 Limit of useful extension (LUE) The procedure shown in Figure 3 is used to calculate the LUE. a) Draw a tangent through the origin that
44、 touches the lower part of the curve. b) Choose a convenient point, C, of the tangent that has a “round number” y value. c) Draw point, D, on the graph, with the same coordinate x than point C but with coordinate y being five times bigger. d) Draw a straight line that joins the origin with point D,
45、and trace a line parallel to it that is a tangent to the curve; thus point A is obtained. This is the point that indicates the elastic materials useful extension. e) Equation (4) shall be used to calculate the limit value, expressed as a percentage: ALUE 100xL= (4) where xAis the coordinate x of poi
46、nt A of the graph, expressed in millimetres; L is the tested length, expressed in millimetres. BS EN ISO 10765:2010ISO 10765:2010(E) 6 ISO 2010 All rights reservedWhen shorter test pieces and a recorder speed double than that of the crosshead speed is used, Equation (5) shall be used. ALUE 50xL= (5)
47、 f) If any damage to the elastic occurs before the calculated extension (fibres or rubber breaking, ladders, etc.), then the limit of useful extension shall be considered as the time of said damage ocurring. The final result shall be the average of the three test pieces. Key X percent extension Y fo
48、rce, in newtons Figure 3 Procedure for calculating the limit of useful extension 7.5 Maximum extension resistance Mark on the graph the greatest peak of the force curve. The coordinate “x” of said point will be the maximum extension resistance value. The final result shall be the average of the thre
49、e test pieces, expressed as a percentage. 7.6 Calculating extension at break point Mark on the graph the point where the elastic material appears to break. The coordinate “x” of this point will be the extension at break point. The final result shall be the average of the three test pieces, expressed as a percentage. BS EN ISO 10765:2010ISO 10765:2010(E) ISO 2010 All rights reserved 78 Test report The test report shall include, at least, the following information: a) reference to this International Standard (i.
