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1、BRITISH STANDARD BS EN 13512:2002 Footwear Test methods for uppers and lining Flex resistance The European Standard EN 13512:2001 has the status of a British Standard ICS 61.060 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: sheffieldun sheffieldun, na, Sun Oct
2、 29 12:43:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13512:2002 This British Standard, having been prepared under the direction of the Materials and Chemicals Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 25 January
3、 2002 BSI 25 January 2002 ISBN 0 580 38926 X National foreword This British Standard is the official English language version of EN 13512:2001. The UK participation in its preparation was entrusted to Technical Committee TCI/69, Footwear and leather, which has the responsibility to: A list of organi
4、zations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standard
5、s Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard
6、does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and
7、 promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since pu
8、blication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13512 November 2001 ICS 61.060 English version Footwear - Test methods for uppers and lining - Flex resistan
9、ce Chaussures - Mthodes dessai pour les tiges et les doublures - Rsistance la flexion Schuhe - Prfverfahren fr Schfte und Futter - Knickfestigkeit This European Standard was approved by CEN on 3 October 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate t
10、he 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 be obtained on application to the Management Centre or to any CEN member. This European Standard exists in
11、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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of A
12、ustria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Manageme
13、nt Centre: rue de Stassart, 36 B-1050 Brussels 2001 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13512:2001 E Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13512:200
14、1 (E) 2 Contents page Foreword3 1Scope 4 2Normative references 4 3Term and definition4 4Apparatus and material.4 5Sampling and conditioning.5 6Test method6 6.1Principle6 6.2Procedure .6 7Test Report.8 Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:06 GMT+00:00 2006, Uncontrolled Copy,
15、(c) BSI EN 13512:2001 (E) 3 Foreword This European Standard has been prepared by Technical Committee CEN/TC 309 “Footwear”, the secretariat of which is held by AENOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement
16、, at the latest by May 2002, and conflicting national standards shall be withdrawn at the latest by May 2002. This European Standard is based on the IULTCS/IUP 20 method. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to i
17、mplement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:06 GMT+00:
18、00 2006, Uncontrolled Copy, (c) BSI EN 13512:2001 (E) 4 1 Scope This European Standard specifies a test method for determining the flex resistance of uppers and linings irrespective of the material, in order to assess the suitability for the end use. 2 Normative references This European Standard inc
19、orporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this E
20、uropean Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 12222, Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear. EN 13400, F
21、ootwear - Sampling location, preparation and duration of conditioning of samples and test pieces. EN ISO 3696, Water for analytical laboratory use - Specification and test methods (ISO 3696:1987). 3 Term and definition For the purposes of this European Standard, the following term and definition app
22、lies. 3.1 flex resistance resistance of a material to crack or otherwise fail at flexing creases 4 Apparatus and material The following apparatus and material shall be used: 4.1Test machine, including the following: 4.1.1At least four pairs of clamps. The upper clamp consists of a pair of flat plate
23、s as shown in Figure 1. The lower clamp is fixed and lies in the same vertical plane as the upper clamp. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13512:2001 (E) 5 Key 1Flexing angle 22?30 ? 0?30 2Clamp tightening screw 32 mm radius
24、 Figure 1 Upper clamp dimensions 4.1.2Means of applying a simple harmonic reciprocating action to repeatedly move the upper clamp through an angle of 22 30 0 30. The speed of oscillation shall be 100 cycles/min 5 cycles/min. The distance between the upper and lower clamp, when the upper clamp is in
25、the horizontal position, shall be 25 mm 1 mm. 4.1.3Means of counting the total number of cycles 4.2For conducting cold tests, a cabinet capable of maintaining an internal atmospheric temperature of at least - 5 ?C 2 ?C and large enough to contain the test machine. If required, temperatures down to -
26、30 ?C can be used. 4.3Press knife (70 mm 1 mm) x (45 mm 1 mm) or similar for cutting test specimens. 4.4For wetting test specimens: 4.4.1Pipette, with a capacity greater than 1 cm3. 4.4.2Clean hard flat water resistant surface greater than 71 mm x 65 mm. 4.4.3Glass rod or scraper. 4.4.4Distilled or
27、deionised water complying with Grade 3 of EN ISO 3696. 4.5Optical magnifier or stereoscopic microscope, with a magnification of approximately 10 times. 5 Sampling and conditioning 5.1Cut out the required number (see Table 1) of rectangular test specimens (70 mm 1 mm) x (45 mm 1mm). Cut half the requ
28、ired number of test specimens with the longer edge parallel with the along direction of the material Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13512:2001 (E) 6 (backbone direction for leather and selvedge (warp) or machine direction
29、 for non-leather materials) and half perpendicular to this. For test specimens cut from uppers the along direction is the X axis as defined in EN 13400. For uppers, cut a test specimen from the centre of the forepart so that the centre of the test specimen aligns with the point of most flexing in th
30、e shoe. For materials cut test specimens from a range of positions across the full usable width and length of the sheet material. For a material with a woven structure this shall prevent any two test specimens containing the same warp or weft threads. It can be that it is impossible to cut a test sp
31、ecimen of sufficient size from certain types of footwear especially childrens. The test specimen size may be reduced slightly but it is preferred to test the materials themselves and if necessary introduce perforations or seams (or other design features) similar to that found in the forepart the sho
32、e. Table 1 Standard test conditions and number of test specimens Type of materialTesting conditions being testedDryWetCold Grain leather22- Coated leather222 Suede-2- Coated fabric4-4 Fabric4- 5.2Place all the test specimens which will be tested dry in a standard controlled atmosphere complying with
33、 EN 12222 for at least 24 h prior to test. 6 Test method 6.1 Principle A rectangular test specimen is clamped in a flexing machine. The mounting of the test specimen is complex. One end of the test specimen is held in an upper clamp with the face or grain surface folded inwards so that these surface
34、s touch and the fold line is horizontal. It is then turned inside out and bent through 90? before being inserted in the lower clamp. In the lower clamp the test specimen is folded so that the reverse or flesh surface of the test specimen touch and the fold line is vertical. The test simulates the da
35、mage caused by the inward folding of the vamp of the upper but does not readily reproduce damage occurring on outward folds. During the test the clamps oscillate at a constant speed so that the test specimen is repeatedly flexed. The tests can be carried out with either wet or dry test specimens at
36、room temperature, or dry test specimens at sub-zero temperatures. After a predetermined number of cycles the tests are stopped and the test specimen is visually examined for signs of damage or salt spue. 6.2 Procedure 6.2.1Mark on the back of each test specimen the along direction of the material, e
37、.g. with an arrow, and determine the required testing conditions. It should be noted that linings will be tested face down and uppers face up. 6.2.2Carry out the test in the conditioned standard atmosphere specified in EN 12222. 6.2.3Place any test specimens that are to be tested wet onto the surfac
38、e (see 6.1) with their reverse face uppermost. Spot 1 cm3 of water from a pipette onto the reverse side of the test specimen and use the glass rod (see 4.4.3) to work it uniformly into the material, to within 5 mm of the edge of the test specimen. It usually takes between 1 min and 2 min for the wat
39、er to be absorbed. When testing leather two of the four test specimens shall normally be tested wet. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13512:2001 (E) 7 6.2.4If conducting a cold test, ensure that the atmosphere surrounding t
40、he flexing machine is at the required temperature (usually -5 ?C 2 ?C). Flexing of the test specimens shall commence 10 min 1 min after they are placed in the cold environment. Therefore the procedure for loading the test specimens onto the flexing machine shall not take longer than 11 min. 6.2.5Loa
41、d each test specimen as follows: 6.2.5.1Set the machine so that each upper clamp is horizontal, i.e. until it is at the upper extremity of its flexing stroke. 6.2.5.2Unscrew the clamping plates of the upper clamp so that they are separated by a distance that is approximately twice the thickness of t
42、he material being tested. 6.2.5.3Fold the test specimen with the face or grain surface inwards, so that the two longer edges of the test specimen are brought together. Insert one end of the folded test specimen between the clamping plates of the upper clamp so that the fold line is horizontal and re
43、sts on the ledge of the clamp (see Figure 2). 6.2.5.4Tighten the clamping plates of the upper clamp to hold the test specimen in place. 6.2.5.5Fold the test specimen inside out round the upper clamp to bring the reverse or flesh sides of the material into contact (see Figure 2). 6.2.5.6Bend the test
44、 specimen through 90? and insert the free end of the test specimen (folded so that the reverse or flesh surface of the specimen touch) in the lower clamp, see Figure 2. Tighten the plates of the lower clamp to hold the test specimen in place ensuring that the specimen is taut and there is no baggine
45、ss around the top clamp. Figure 2 Loading of test specimens 6.2.6Run the machine until the first inspection stage, see Table 2. 6.2.7In addition to the normal inspection stages wet test specimens shall be removed from the machine after every 6 000 cycles and assessed for salt spue before rewetting b
46、y repeating the procedure in 6.2.3. Table 2 Suitable inspection stages DryWetSub zero 1 000NOYESYES 2 000NOYESYES 5 000NOYESYES 10 000YESYESYES 25 000YESNONO 50 000YESNONO 100 000YESNONO The inspection stages used during each individual test will depend on the total time available for the test and t
47、he expected performance of the material. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 12:43:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13512:2001 (E) 8 6.2.8Stop the test and remove the test specimens. Use both the unaided eye and the optical magnifier (see 4.5) to assess the flexing
48、 damage. When looking for damage inspect the specimen both folded and flat. Inspect the inward fold (i.e. the central fold close to the edge of the upper clamp) of each test specimen and record any signs of damage. Any damage to the parts of the test specimen held within either clamp of the flexing
49、machine shall be ignored as shall any damage caused by rubbing of the test specimen on the clamps. 6.2.9For materials with a continuous surface coating record the following: a) whether the specimen shows slight or heavy creasing in the fold; b) the number of cracks in fold; c) the depth of the deepest crack in the fold using the terms: ? into but not through the surface finish; ? extending through the surface finish to expose an underlying layer - state whether the exposed layer is a contrasting colour; ? extending through
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