BS-EN-ISO-20864-2004.pdf

BRITISH STANDARD BS EN ISO 20864:2004 Footwear Test methods for stiffeners and toepuffs Mechanical characteristics The European Standard EN ISO 20864:2004 has the status of a British Standard ICS 61.060 ? BS EN ISO 20864:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 21 December 2004 © BSI 21 December 2004 ISBN 0 580 45128 3 National foreword This British Standard is the official English language version of EN ISO 20864:2004. It is identical with ISO 20864:2004. The UK participation in its preparation was 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 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 provisions 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 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 title page, pages 2 to 19 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN ISO 20864 December 2004 ICS 61.060 English version Footwear - Test methods for stiffeners and toepuffs - Mechanical characteristics (ISO 20864:2004) Chaussures - Méthodes d'essai des contreforts et des bouts durs - Caractéristiques mécaniques (ISO 20864:2004) Schuhe - Prüfverfahren für Hinterkappen und Vorderkappen - Mechanische Kenngrößen (ISO 20864:2004) This European Standard was approved by CEN on 23 August 2004. 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 be obtained on application to the Central Secretariat 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2004 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 20864:2004: E 2 Contents page Foreword3 1 Scope 4 2 Normative references4 3 Terms and definitions .4 4 Apparatus and material.4 4.1 General4 4.2 Methods 1 and 2.4 4.3 Method 1 (only) 7 4.4 Method 2 (only) 7 4.5 Method 3.7 4.6 All methods 8 5 Sampling and conditioning.12 5.1 Method 1.12 5.2 Method 2.13 5.3 Method 3.14 6 Procedure (all methods)15 6.1 Shape retention value .15 6.1.1 Dry testing15 6.1.2 Wet testing15 6.2 Collapsing load of the test specimen15 6.2.1 Dry testing15 6.2.2 Wet testing16 6.3 Shape retention after ten collapses.16 6.3.1 Dry testing16 6.3.2 Wet testing16 7 Expression of results 16 7.1 Shape retention16 7.2 Collapsing load17 7.3 Shape retention after ten collapses.17 7.4 Resilience .17 7.5 Moisture resistance.17 8 Test report17 Annex ZA (normative) Normative references to International publications with their corresponding European publications18 Bibliography19 EN ISO 20864:2004 3 Foreword This document (EN ISO 20864:2004) 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 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. This document includes a Bibliography. According to the CEN/CENELEC 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, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN ISO 20864:2004 4 1 Scope This document specifies three methods for determining the shape retention properties and compression strength of a domed test specimen. These methods are the following and they are applicable to footwear toepuff and stiffener: Method 1: Applicable to heat activated materials Method 2: Applicable to solvent activated materials Method 3: Applicable to non-thermoplastic fibreboard NOTE Although it is usual to determine both the shape retention properties and the compression strength of a domed test specimen, either can be determined alone by carrying out the procedures relating to the respective property. 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. EN 12222, Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear. EN ISO 7500-1, Metallic materials - Verification of static uniaxial testing machines - Part 1: Tension/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 shape retention aptitude of the material to maintain the original shape (dome) after loading the test piece several times 3.2 compression strength force required to deform the test piece in determined extent 4 Apparatus and material 4.1 General The following apparatus and material shall be used. 4.2 Methods 1 and 2 4.2.1 A dome forming tool made of a rigid heat and solvent resistant material and consisting of: 4.2.1.1 A dome capped piston of diameter 47,5 mm ± 0,5 mm and dome of curvature radius 35,0 mm ± 0,5 mm. This will produce a dome of height 9,3 mm ± 0,2 mm. EN ISO 20864:2004 5 4.2.1.2 A metal cylinder with: an internal diameter less than 48 mm but large enough to allow the piston (4.2.1.1) to move freely within it; a length of at least 25 mm; a clamping ring flange on one end to take the clamping ring as specified (4.2.1.4). 4.2.1.3 Means of holding the piston to the cylinder in a position such that the edge of the domed cap is aligned with the outer surface of the clamping ring flange. 4.2.1.4 A clamping ring with: an internal diameter of less than 48 mm but large enough to allow the piston (4.2.1.1) to move freely within it; an external diameter and design of any surface pattern that should ensure that the test specimen does not slip during the test, and should neither stretch nor compress the central area of the test specimen as it is clamped; a method of tightening the clamping ring to the clamping flange on the end of the cylinder (4.2.1.2). A diagram of the apparatus is given in Figure 1. EN ISO 20864:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:38:54 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 Key 1 Clamping ring (4.2.1.4) 2 Test specimen 3 Metal cylinder (4.2.1.2) 4 Piston Figure 1 Dome forming tool 4.2.1.5 A device, such as a press, for forcing the piston (4.2.1.1) into the metal cylinder (4.2.1.2). 4.2.2 A device, such as a press knife, for cutting circular test specimens of diameter to fit the dome forming tool (4.2.1). 4.2.3 Thin polyethylene sheet material. 4.2.4 A device, such as a press knife, for cutting circular polyethylene rings of suitable diameter for the dome forming tool (4.2.1). 4.2.5 An electric fan. EN ISO 20864:2004 7 4.3 Method 1 (only) 4.3.1 A fan assisted oven capable of maintaining a temperature of 80 °C ± 5 °C. 4.3.2 Heat resistant gloves. 4.4 Method 2 (only) 4.4.1 Acetone or other solvent recommended by the material manufacturer. 4.4.2 Silicone based release agent in the form of a spray. 4.5 Method 3 4.5.1 A two part metal mould (see Figure 2) with: a lower block having a spherical recess of diameter 47,5 mm ± 0,5 mm, depth 9,3 mm ± 0,2 mm and radius of curvature 35,0 mm ± 0,5 mm; an upper block having a downward facing spherical dome of the same dimensions as the spherical recess in the lower block, such that the dome will fit into the recess; a mechanism for holding together the two halves of the mould. EN ISO 20864:2004 8 Key 1 Spherical dome 2 Test specimen 3 Spherical recess Figure 2 Two part metal mould 4.5.2 A hydraulic press capable of applying a force of up to 120 kN ± 10 kN to the mould. 4.5.3 A device, such as a press knife, for cutting circular test specimens of diameter to fit the mould (4.5.1). 4.5.4 A source of steam, such as an electric kettle which can be kept boiling. 4.5.5 Thongs or similar apparatus for holding test specimens in a jet of steam. 4.6 All methods 4.6.1 A height gauge (see Figure 3), consisting of: 4.6.1.1 A flat plate with: a clamping ring meeting the requirements of (4.2.1.4) fitted on its lower surface; means of supporting the plate so that: it is horizontal; EN ISO 20864:2004 9 the clamping ring is lowermost; there is at least 20 mm of clearance below the plate. a hole through the plate which is at the centre of the clamping ring and of diameter less than the clamping ring but large enough to allow the spindle of the thickness gauge (4.6.1.2) to move freely within it. 4.6.1.2 A thickness gauge which: has a spindle with a spherical lower surface of radius 1,5 mm ± 0,2 mm. applies a force of 0,55 N ± 0,10 N to the spindle. is capable of measuring to the nearest 0,05 mm. is mounted so that the spindle passes vertically through the hole in the flat plate (4.6.1.1). EN ISO 20864:2004 10 Key 1 Thickness gauge (4.6.1.2) 2 Flat plate (4.6.1.1) 3 Clamping ring 4 Test specimen Figure 3 Height gauge 4.6.2 A device that can be used to cover the hole in the flat plate (4.6.1.1) from the lower surface. The device should have a flat face such that, when placed over the hole, it provides a surface which is flush with the lower surface of the flat plate. A metal cylinder is suitable. 4.6.3 A tensile testing machine with: 4.6.3.1 A jaw separation rate of 50 mm/min ± 5 mm/min. EN ISO 20864:2004 11 4.6.3.2 A force range appropriate to the test specimen material. This will usually be less than: 200 N for toe puff materials 500 N for stiffener materials 4.6.3.3 Means of measuring the force to an accuracy of better than 2 % as specified by class 2 in EN ISO 7500-1. 4.6.4 A compression cage (see Figure 4), for use with the tensile testing machine, with: 4.6.4.1 A vertically mounted plunger, the end face of which is circular and has a diameter of 19,00 mm ± 2,5 mm. 4.6.4.2 A platform upon which the domed test specimen can be mounted centrally under the plunger. 4.6.4.3 A minimum clearance of 20 mm between the plunger and the platform. Key 1 Compression cage 2 Plunger 3 Test specimen Figure 4 Compression cage NOTE If suitable apparatus is available, the specimen can be compressed directly, without the use of the compression cage. EN ISO 20864:2004 12 4.6.5 A device (see Figure 5) for manually compressing the domed test specimens with: 4.6.5.1 A vertically mounted plunger, the end face of which is circular and has a diameter of 19,00 mm ± 2,5 mm. 4.6.5.2 A rigid base plate upon which the domed test specimen can be mounted centrally under the plunger. 4.6.5.3 A minimum clearance of 20 mm between the base plate and the plunger. Key 1 Test specimen 2 Plunger 3 Base plate Figure 5 Manual compression device 4.6.6 Distilled or deionised water. 5 Sampling and conditioning 5.1 Method 1 5.1.1 Use the device (4.2.2) to cut six circular specimens of suitable diameter. In the case of sheet material, no part of any test specimen should be cut from an area closer than 50 mm to a manufactured edge. EN ISO 20864:2004 13 5.1.2 If the test specimen is coated with adhesive on only one side, use the device (4.2.4) to cut six rings from the polyethylene sheet material (4.2.3). 5.1.3 If the test specimen material is coated with adhesive on both sides, use the device (4.2.2) to cut six circular discs of polyethylene. Additionally, follow the procedure in 5.1.2 to cut six rings of polyethylene. 5.1.4 If the test specimen material is not coated with adhesive, place one of the test specimens centrally over the flange of the metal cylinder (4.2.1.2). 5.1.5 If the test specimen material is coated with adhesive on only one side, place one of the test specimens centrally over the flange of the metal cylinder (4.2.1.2) with the coated side uppermost. Place a polyethylene ring (5.1.2) over the test specimen before fitting the clamping ring. 5.1.6 If the test specimen material is coated with adhesive on both sides, place a polyethylene disc (5.1.3) centrally over the flange of the metal cylinder, followed by one of the test specimens and a polyethylene ring. 5.1.7 Fit the clamping ring (4.2.1.4) centrally over the test specimen and fully tighten it to the flange of the metal cylinder so that the specimen is securely clamped. 5.1.8 Activate the test specimen by heating the clamped test specimen assembly in the oven (4.3.1) at the temperature specified by the manufacturer or, if it is not provided, at 80 °C ± 5 °C for 2 min ± 0,5 min. Remove the test specimen assembly from the oven wearing heat resistant gloves (4.3.2) then form the test specimen into a dome shape within 30 s. 5.1.9 Use the device (4.2.1.5) to force the piston (4.2.1.1) into the test specimen un