SIST EN ISO 20864:2005

Footwear - Test methods for stiffeners and toepuffs - Mechanical characteristics (ISO 20864:2004)

ISO 20864:2004 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

Schuhe - Prüfverfahren für Hinterkappen und Vorderkappen - Mechanische Kenngrößen (ISO 20864:2004)

Dieses Dokument legt drei Verfahren zur Bestimmung der Eigenschaften des Formhaltevermögens und der
Druckfestigkeit eines gewölbten Prüfstücks fest. Diese Verfahren werden im Folgenden aufgeführt und gelten
für Hinter- und Vorderkappen von Schuhen:
Verfahren 1: Geeignet für heißaktivierte Werkstoffe
Verfahren 2: Geeignet für getauchte Werkstoffe
Verfahren 3: Geeignet für nichtthermoplastische Hartpappe.
ANMERKUNG Obwohl es üblich ist, sowohl die Eigenschaften des Formhaltevermögens als auch die Druckfestigkeit
eines gewölbten Prüfstücks zu bestimmen, dürfen sie auch gesondert mit den Verfahren für die entsprechende
Eigenschaft bestimmt werden.

Chaussures - Méthodes d'essai des contreforts et des bouts durs - Caractéristiques mécaniques (ISO 20864:2004)

L'ISO 20864:2004 spécifie trois méthodes de détermination de l'indéformabilité et de la résistance à la compression d'une éprouvette convexe. Ces méthodes sont applicables aux contreforts et bouts des chaussures et sont respectivement:
méthode 1: applicable aux matériaux à réactivation thermique
méthode 2: applicable aux matériaux à réactivation chimique
méthode 3: applicable aux cartons-fibre à réactivation non thermoplastique

Obutev - Preskusne metode za ojačitve v petnem in prstnem delu čevlja - Mehanske značilnosti (ISO 20864:2004)

General Information

• Status: Published
• Publication Date: 31-Mar-2005
• ICS: 61.060 - Footwear
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-2005
• Due Date: 01-Apr-2005
• Completion Date: 01-Apr-2005
• Ref Project: EN ISO 20864:2004 - Footwear - Test methods for stiffeners and toepuffs - Mechanical characteristics (ISO 20864:2004)

Overview

EN ISO 20864:2004 - "Footwear - Test methods for stiffeners and toepuffs - Mechanical characteristics" (CEN adoption of ISO 20864:2004) defines standardized laboratory procedures to evaluate the shape retention and compression strength of domed test specimens used for footwear toepuffs and stiffeners. The standard specifies three distinct methods tailored to common material types: heat‑activated, solvent‑activated, and non‑thermoplastic fibreboard components.

Key topics and technical requirements

• Three test methods
  • Method 1: For heat‑activated materials (oven activation then dome forming).
  • Method 2: For solvent‑activated materials (solvent application then forming).
  • Method 3: For non‑thermoplastic fibreboard (moulding under hydraulic press/steam).
• Measured properties
  • Shape retention value (ability to maintain the domed shape after repeated loading).
  • Collapsing (compression) load - force required to deform the dome.
  • Shape retention after ten collapses, resilience, and moisture resistance.
• Apparatus and dimensions
  • Standardized dome forming tools or two‑part moulds, height gauges with specified spindle geometry and force, compression plunger (approx. 19 mm diameter), and tensile/compression testing machines with defined accuracy (force measurement per EN ISO 7500‑1).
  • Conditioning and sampling requirements (controlled atmospheres per EN 12222), specimen cutting and clamping, activation procedures (heat or solvent) and controlled cooling/settling before testing.
• Test procedure essentials
  • Conditioning, forming the domed specimen, repeated compression cycles or single collapse tests, and clear instructions for expressing results and reporting.

Applications and users

• Footwear manufacturers - validate and compare toepuff and stiffener materials during product development or incoming quality control.
• Component suppliers - specify mechanical characteristics for material data sheets and supplier declarations.
• Testing laboratories - perform accredited mechanical tests for compliance, R&D and failure analysis.
• Design and R&D teams - select appropriate stiffener/toepuff materials to meet performance and comfort requirements (shape stability, support, durability).
• Quality assurance - integrate results into acceptance criteria and supplier audits.

Keywords: EN ISO 20864:2004, footwear test methods, stiffeners, toepuffs, mechanical characteristics, shape retention, compression strength, dome test specimen.

Related standards

• EN 12222 - Standard atmospheres for conditioning and testing of footwear and components.
• EN ISO 7500‑1 - Verification of static uniaxial testing machines (force‑measuring system).

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2005
2EXWHY3UHVNXVQHPHWRGH]DRMDþLWYHYSHWQHPLQSUVWQHPGHOXþHYOMD
0HKDQVNH]QDþLOQRVWL,62
Footwear - Test methods for stiffeners and toepuffs - Mechanical characteristics (ISO
20864:2004)
Schuhe - Prüfverfahren für Hinterkappen und Vorderkappen - Mechanische Kenngrößen
(ISO 20864:2004)
Chaussures - Méthodes d'essai des contreforts et des bouts durs - Caractéristiques
mécaniques (ISO 20864:2004)
Ta slovenski standard je istoveten z: EN ISO 20864:2004
ICS:
61.060 Obuvala Footwear
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 20864
NORME EUROPÉENNE
EUROPÄISCHE NORM
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 Schuhe - Prüfverfahren für Hinterkappen und Vorderkappen
bouts durs - Caractéristiques mécaniques (ISO - Mechanische Kenngrößen (ISO 20864:2004)
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 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 20864:2004: E
worldwide for CEN national Members.

Contents page
Foreword.3
1 Scope .4
2 Normative references .4
3 Terms and definitions .4
4 Apparatus and material.4
4.1 General.4
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 testing .15
6.1.2 Wet testing.15
6.2 Collapsing load of the test specimen .15
6.2.1 Dry testing .15
6.2.2 Wet testing.16
6.3 Shape retention after ten collapses.16
6.3.1 Dry testing .16
6.3.2 Wet testing.16
7 Expression of results .16
7.1 Shape retention.16
7.2 Collapsing load .17
7.3 Shape retention after ten collapses.17
7.4 Resilience .17
7.5 Moisture resistance .17
8 Test report .17
Annex ZA (normative) Normative references to International publications with their
corresponding European publications.18
Bibliography .19

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.
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.
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.

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.
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.
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;
• 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).
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.
...