1、December 2010 Translation by DIN-Sprachendienst.English price group 8No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).IC
2、S 61.060!$lp“1735977www.din.deDDIN EN ISO 10765Footwear Test method for the characterization of elastic materials Tensile performance (ISO 10765:2010)English translation of DIN EN ISO 10765:2010-12Schuhe Prfverfahren zur Charakterisierung elastischer Materialien Gebrauchsverhalten unter Zugbeanspruc
3、hung (ISO 10765:2010)Englische bersetzung von DIN EN ISO 10765:2010-12Chaussures Mthode dessai de caractrisation des matriaux lastiques Performances de traction (ISO 10765:2010)Traduction anglaise de DIN EN ISO 10765:2010-12www.beuth.deDocument comprises pagesIn case of doubt, the German-language or
4、iginal shall be considered authoritative.1212.10 DIN EN ISO 10765:2010-12 2 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 309 “Footwear” (Secretariat: AENOR, Spain) in collaboration with Technical Committee ISO/TC 216 “Footwear
5、”. The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Committee NA 062-04-52 AA Schuhe. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 10765 July 2010 ICS 61.060 English Version Footwear - Test met
6、hod for the characterization of elastic materials - Tensile performance (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 Zugb
7、eanspruchung (ISO 10765:2010) This European Standard was approved by CEN 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 lis
8、ts and bibliographical references concerning such national standards may 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 res
9、ponsibility of a CEN member into its own language and notified to the CEN 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,
10、Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, 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 C
11、entre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 10765:2010: EContents DIN EN ISO 10765:2010-12 EN ISO 10765:2010 (E) 2 Page Foreword3 1 Scope 4 2 Normative references 4 3 Terms and
12、definitions .4 4 Apparatus and materials.5 5 Sampling and conditioning.5 5.1 Sampling.5 5.2 Conditioning.6 6 Procedure .6 7 Expression of results 7 7.1 General7 7.2 Modulus 7 7.3 Elastic gradient (EG) .8 7.4 Limit of useful extension (LUE)8 7.5 Maximum extension resistance9 7.6 Calculating extension
13、 at break point.9 8 Test report 10 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, in collaboration with Technical Committee ISO/TC 216 Footwear”. This European Standard shall be given the status of
14、 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 by January 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject
15、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 standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgar
16、ia, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. “ DIN EN ISO 10765:2
17、010-12 EN ISO 10765:2010 (E) 3 1 Scope This 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 materia
18、l used for footwear. 2 Normative references 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 1
19、8454, Footwear Standard atmospheres for conditioning 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 stre
20、tch and return to its original shape NOTE Generally 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
21、band until a given extension, with reference 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 a
22、nd the rubber threads that form elastic begins. DIN EN ISO 10765:2010-12 EN ISO 10765:2010 (E) 4 3.5 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
23、 can provide crosshead speeds 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 t
24、ex 17/3) and operating at 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
25、 material is limited, this 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 p
26、ieces are used, they shall 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 s
27、ix of them, draw a parallel 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 d
28、rawn on the elastic aligns 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 se
29、w parallel to and 5 mm from 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
30、order to prepare the other two samples. DIN EN ISO 10765:2010-12 EN ISO 10765:2010 (E) 5 Dimensions 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 Dimen
31、sions 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 se
32、ams of 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 tes
33、ting machine (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
34、twice the jaws separation speed so as to improve precision of extension measurements on the graph. DIN EN ISO 10765:2010-12 EN ISO 10765:2010 (E) 6 6.3 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 the materials
35、 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 results 7.1
36、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 strength of elastic
37、 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 % modulus using
38、Equation (1). 20 % modulus = 20yb(1) DIN EN ISO 10765:2010-12 EN ISO 10765:2010 (E) 7 7.2.2 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 = 50yb(2) In all cases calculate
39、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) (x0,y0) are any two points on the
40、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 touches the lower part of the c
41、urve. 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, and trace a line parallel to it
42、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 point A of the graph, expressed in
43、millimetres; L is the tested length, expressed in millimetres. DIN EN ISO 10765:2010-12 EN ISO 10765:2010 (E) 8 When shorter test pieces and a recorder speed double than that of the crosshead speed is used, Equation (5) shall be used. ALUE 50xL= (5) f) If any damage to the elastic occurs before the
44、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 force, in newtons Figure 3 Procedure for calculating
45、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 three test pieces, expressed as a percentage. 7.6 Calcu
46、lating 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. DIN EN ISO 10765:2010-12 EN ISO 1
47、0765:2010 (E) 9 8 Test report The test report shall include, at least, the following information: a) reference to this International Standard (i.e. ISO 10765:2010); b) a complete description of the elastic material; c) the average value of the modulus at 20 % elongation and 50 % elongation, expresse
48、d in newtons per centimetre; d) the average value of the limit of useful extension, expressed as a percentage; e) the average value of elastic gradient, expressed in newtons per centimetre per 1 % elongation; f) the average value of the maximum extension resistance, expressed as a percentage; g) the average value of the extension at break point, expressed as a percentage; h) any deviations from this method. DIN EN ISO 10765:2010-12 EN ISO 10765:2010 (E) 10
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