SIST EN ISO 20864:2005

• Abstract:

  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

• 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)

• Refers: SIST EN ISO 7500-1:2018 - Metallic materials - Calibration and verification of static uniaxial testing machines - Part 1: Tension/compression testing machines - Calibration and verification of the force-measuring system (ISO 7500-1:2018)
• Effective Date: 28-Jan-2026
• Refers: SIST EN 12222:2000 - Footwear - Standard atmospheres for conditioning and testing of footwear and components for footwear
• Effective Date: 28-Jan-2026
• Referred By: SIST-TP CEN ISO/TR 22648:2007 - Footwear - Performance requirements for components for footwear - Stiffeners and toepuffs (ISO/TR 22648:2007)
• Effective Date: 28-Jan-2026

SIST EN ISO 20864:2005 is a Slovenian standard published by SIST that adopts EN ISO 20864:2004 for footwear testing. It specifies three test methods for the shape retention properties and compression strength of a domed test specimen used for footwear toepuff and stiffener materials. The methods cover heat activated materials, solvent activated materials, and non-thermoplastic fibreboard, so the document is aimed at people who test, specify, or compare these components in footwear.

What does SIST EN ISO 20864:2005 specify?

SIST EN ISO 20864:2005 specifies how to prepare a domed test specimen and how to measure its shape retention and compression behaviour for footwear toepuff and stiffener materials. Clause 1 limits the standard to three material-specific methods, and the test can be used to determine either property on its own or both together.

The document is organized in the usual test-method structure:

• Clause 1 - Scope
• Clause 2 - Normative references
• Clause 3 - Terms and definitions
• Clause 4 - Apparatus and material
• Clause 5 - Sampling and conditioning
• Clause 6 - Procedure
• Clause 7 - Expression of results
• Clause 8 - Test report
• Annex ZA - Normative references to International publications with their corresponding European publications
• Bibliography - EN ISO 2589

In practice, that structure tells the reader where to find the equipment, how to prepare specimens, how to run dry and wet tests, and what to report.

What are the key requirements of SIST EN ISO 20864:2005?

Specimen preparation and conditioning

Clause 1 and Clause 5 set out three different preparation routes, one for each material type. Method 1 is for heat activated materials, Method 2 for solvent activated materials, and Method 3 for non-thermoplastic fibreboard.

Each method uses six circular specimens, and sheet material specimens must not be cut closer than 50 mm to a manufactured edge. That matters because edge effects can change the measured behaviour and make results harder to compare.

Conditioning is done in a standard controlled environment according to EN 12222. For Methods 1 and 2, the standard also specifies time limits after forming and before testing, so the specimen reaches a defined state before the measurements are taken.

Apparatus and test setup

Clause 4 specifies the forming and measuring equipment in detail. For Methods 1 and 2, the document uses a dome forming tool with a piston and cylinder, a clamping ring, a heating oven for Method 1, and solvent plus release agent for Method 2. For Method 3, it uses a two part metal mould, a hydraulic press, and steam treatment.

The measurement side uses a height gauge, a tensile testing machine with a compression cage, or a manual compression device. The force-measuring system on the machine is tied to EN ISO 7500-1, which matters because the peak load results depend on force accuracy.

Test procedures for dry and wet testing

Clause 6 gives the main test sequence. Shape retention is measured by comparing the height reading on the empty gauge setup with the reading on the domed specimen, while collapsing load is measured from the peak force needed to deform the specimen.

The standard covers both dry testing and wet testing. For wet testing, specimens are soaked in distilled or deionised water at 23 °C ± 2 °C for about 16 h before the same measurements are repeated. That makes the results useful when a buyer or lab needs to compare behaviour after moisture exposure, not just in dry conditions.

For shape retention after ten collapses, the specimen is collapsed repeatedly and then measured again. This is important because some materials hold their form at first but lose structure after repeated use.

Result calculations

Clause 7 defines the reported values:

• shape retention is calculated from the measured specimen height and the height of the forming tool
• collapsing load is reported as the arithmetic mean of peak load values
• shape retention after ten collapses is reported as an arithmetic mean
• resilience is calculated from the tenth dry collapsing load and the first dry collapsing load
• moisture resistance is calculated from the first wet collapsing load and the first dry collapsing load

In practice, these calculations turn the test into comparable percentage and load values that can be used in specifications, incoming inspection, or product comparison.

Test report content

Clause 8 requires the report to include the initial area shape retention value, the first and tenth collapsing load values, the area shape retention after ten collapses, resilience, moisture resistance, a full sample description, the reference to the test method, the test date, and any deviations from the method. That gives the reader enough information to trace how the result was produced and whether the conditions were standard.

What terms does SIST EN ISO 20864:2005 define?

• shape retention - the aptitude of the material to maintain the original dome shape after repeated loading.
• compression strength - the force required to deform the test piece by a specified extent.
• domed test specimen - the circular specimen formed into a dome before the retention and load measurements are taken.
• first collapsing load - the mean peak force from the initial collapse test on three specimens.
• tenth dry collapsing load - the mean peak force after the specimen has been collapsed ten times under dry conditions.
• resilience - the percentage ratio of tenth dry collapsing load to first dry collapsing load.
• moisture resistance - the percentage ratio of first wet collapsing load to first dry collapsing load.

Who uses SIST EN ISO 20864:2005?

SIST EN ISO 20864:2005 is used in footwear testing for toe puff and stiffener materials. Footwear laboratories use it to prepare specimens, run the dry and wet tests, and report comparable results.

Manufacturers and material suppliers use it when they need to compare heat activated, solvent activated, or fibreboard components before they are built into footwear. Quality and product development teams use the reported shape retention, collapsing load, resilience, and moisture resistance values to judge whether a material behaves as expected in use.

What changed in SIST EN ISO 20864:2005 from the previous edition?

SIST EN ISO 20864:2005 is the Slovenian standard identical to EN ISO 20864:2004. The document shown here carries the same technical content as that European Standard.

Which standards are used with SIST EN ISO 20864:2005?

Clause 2 names two normative references:

• EN 12222 - gives the standard atmospheres used for conditioning and testing footwear and footwear components.
• EN ISO 7500-1 - sets the verification and calibration requirements for the force-measuring system on tension/compression testing machines.

Annex ZA links these to the international publications ISO 18454 and ISO 7500-1. The Bibliography also cites EN ISO 2589, which is mentioned in a note for measuring the thickness of the unmoulded test specimen.

What does the SIST EN ISO 20864:2005 document contain?

SIST EN ISO 20864:2005 contains the three preparation methods, the apparatus descriptions, and the measurement procedures needed to test footwear stiffeners and toepuffs. It includes drawings of the dome forming tool, the two part metal mould, the height gauge, the compression cage, and the manual compression device.

The document also gives the wet and dry test sequences, the calculation formulas for shape retention, collapsing load, resilience, and moisture resistance, and the required test report items. For a reader, that means the standard is not just a result definition - it is a complete laboratory method from specimen preparation through reporting.

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.
...