Bsi bs en 00522 1998 (1999)

Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:03:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI

BRITISH STANDARD

Adhesives for leather
and footwear
materials — Bond
strength — Minimum
requirements and
adhesive classification

The European Standard EN 522:1998 has the status of a
British Standard

ICS 61.060; 83.180

BS EN
522:1998


BS EN 522:1998

Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:03:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI

National foreword
This British Standard is the English language version of EN 522:1998
published by the European Committee for Standardization (CEN).
The UK participation in its preparation was entrusted to Technical Committee
STI/52, Adhesives, which has the responsibility to:
— 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
promulgate them in the UK.
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 Standards
Catalogue under the section entitled “International Standards 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 does not of itself confer immunity
from legal obligations.

Summary of pages
This document comprises a front cover, an inside front cover, pages i and ii,
the EN title page, pages 2 to 5 and a back cover.
This standard has been updated (see copyright date) and may have had
amendments incorporated. This will be indicated in the amendment table on
the inside front cover.

This British Standard, having
been prepared under the
direction of the Sector Board
for Materials and Chemicals,
was published under the
authority of the Standards

Board and comes
into effect on
15 July 1998
© BSI 05-1999
ISBN 0 580 29644 X

Amendments issued since publication
Amd. No.

Date

Comments


Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:03:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI

BS EN 522:1998

Contents

National foreword
Foreword
Text of EN 522

© BSI 05-1999

Page
Inside front cover
2
3

i


ii

blank

Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:03:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI


EUROPEAN STANDARD

EN 522

NORME EUROPÉENNE
February 1998

Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:03:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI

EUROPÄISCHE NORM
ICS 61.060; 83.180

Descriptors: Adhesives, footwear, materials, leather, rubber, polyvinyl chloride, bonding, destructive test, bond strength, peel test,
shear test, creep test at elevated temperature, testing conditions, classification

English version

Adhesives for leather and footwear materials — Bond
strength — Minimum requirements and adhesive

classification

Adhésifs pour cuir et matériaux de la
chaussure — Force d’adhésion — Prescriptions
minimales et classification des adhésifs

Klebstoffe für Leder und Schuhwerkstoffe —
Festigkeit der Klebungen —
Mindestanforderungen und
Klebstoffklassifikation

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

This European Standard was approved by CEN on 24 January 1998.
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,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland,
Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and United Kingdom.

CEN
European Committee for Standardization

Comité Européen de Normalisation
Europäisches Komitee für Normung
Central Secretariat: rue de Stassart 36, B-1050 Brussels
© 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national
Members.
Ref. No. EN 522:1998 E


Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:03:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI

EN 522:1998

Foreword
This European Standard has been prepared by
Technical Committee CEN/TC 193, Adhesives, 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, at the latest by
August 1998, and conflicting national standards
shall be withdrawn at the latest by August 1998.
According to the CEN/CENELEC Internal
Regulations, the national standards organizations
of the following countries are bound to implement
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.

Contents
Foreword
1
Scope
2
Normative references
3
Definitions
4
Principle
5
Safety
6
Requirements
7
Test methods
8
Test report
9
Adhesive classification
Table 1 — Adhesive classes and codes

Page
2
3
3
3
3
3

3
4
4
5
5

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

2

© BSI 05-1999


Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:03:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI

EN 522:1998

1 Scope
This standard specifies a method for evaluating
solvent based and dispersion adhesives intended for
use for sole attachment.
It specifies minimum requirements for some
strength properties of bonds made with these
adhesives and establishes an adhesive classification
based on the results obtained with reference test
materials representing types of leather, rubber or
plastic materials often used as upper or bottom
materials in footwear manufacture.

2 Normative references

This European Standard incorporates, 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 European
Standard only when incorporated in it by
amendment or revision. For undated references the
latest edition of the publication referred to applies.
EN 923, Adhesives — Terms and definitions.
EN 1392, Adhesives for leather and footwear
materials — Solvent based and water based
adhesives — Test methods for measuring the bond
strength under specified conditions.
ISO 554, Standard atmospheres for conditioning
and/or testing — Specifications.
ISO 868, Plastic and ebonite — Determination of
indentation hardness by means of a durometer
(Shore hardness).

This standard does not purport to address all the
safety problems, if any, associated with its use.
It is the responsibility of the user to establish safety
and health practices and to ensure compliance with
any European or national regulatory conditions.

6 Requirements
6.1 General
In practice, leather and footwear material bonds are

usually part of complex structures which are
subjected to various stresses and used in different
climates.
All requirements met in practice cannot be covered
by one single standard. Therefore this standard
shall only define some minimum requirements for
the bonding properties of sole attaching adhesives.
In addition this standard establishes a suitable
classification using the results obtained with
reference test materials specified in 7.2.
6.2 Adhesive identification
The adhesive to be tested shall be completely
identified in the test report, in particular note the
name and/or designation, manufacturer, date of
manufacture/supply and/or lot number, main
polymer and colour. For two-part adhesives the
nature of the cross-linking agent and the mixing
ratio of the components shall be identified.

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

3 Definitions
For the purposes of this standard, the definitions in
accordance with EN 923, EN 1392 and the following
definition applies:
3.1
adhesives for footwear materials
adhesives intended for the permanent bonding of
footwear materials

4 Principle
Two strips of reference test material are bonded
with the adhesive to be tested to produce test pieces
of defined form. These test pieces are stored under
specified conditions and their bond strength is
determined under specified conditions.

5 Safety
Persons using this standard shall be familiar with
normal laboratory practice.

© BSI 05-1999

6.3 Minimum requirements
6.3.1 The initial peel resistance 2 min after
assembling shall not be less than 1,0 N/mm.
6.3.2 The peel resistance after 3 days to 5 days
storage in the standard atmosphere 23/50 in
accordance with ISO 554 shall not be less
than 5,0 N/mm.
6.3.3 The peel resistance after 7 days at (50 ± 2) °C
and 2 days to 4 days storage in the standard
atmosphere 23/50 in accordance with ISO 554 shall
be at least 80 % of the value determined in
accordance with 6.3.2 but shall not be less
than 5,0 N/mm.
6.3.4 The shear strength after 3 days to 5 days
storage in the standard atmosphere 23/50 in
accordance with ISO 554 shall not be less
than 2,0 MPa.

6.3.5 The peel resistance at a load of 1,5 kg
at (50 ± 2) °C for 10 min (“creep resistance”)
shall be less than 10 mm.
NOTE These minimum requirements refer only to bonds in
everyday footwear worn under ambient conditions.
For special footwear, for instance safety, work or sports shoes,
which are subjected to additional stresses and/or different
environmental conditions, other additional testing can be
necessary.

3


Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:03:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI

EN 522:1998

7 Test methods
7.1 Types of tests
7.1.1 Peel test at (23 ± 2) °C
In accordance with EN 1392.
7.1.2 Shear test at (23 ± 2) °C
In accordance with EN 1392.
7.1.3 Peel test at (50 ± 2) °C for 10 min at a
constant load of 1,5 kg (“creep test”)
In accordance with EN 1392.
7.2 Reference test materials
A large number of different materials are used in
leather processing and in the footwear industry.
From the most important and most often used

material groups the following materials shall be
selected as reference test materials:
a) Reference test material leather 1: Upper
leather, chrome tanned split;
b) Reference test material leather 2: Sole leather,
butt, vegetable tanned;
c) Reference test material SBR 1: Resin rubber,
nominal Shore A hardness 95 in accordance with
ISO 868;
d) Reference test material SBR 2: SBR rubber,
nominal Shore A hardness 70 in accordance with
ISO 868;
e) Reference test material NBR: Nitrile rubber,
Shore A hardness 80 nominal in accordance with
ISO 868;
f) Reference test material SBSR: Thermoplastic
rubber, nominal Shore A hardness 60 in
accordance with ISO 868;
g) Reference test material polyvinylchloride
(PVC): Plasticized (PVC), nominal Shore A
hardness 70 in accordance with ISO 868.
NOTE The properties and the suitability of the reference test
materials listed are checked and ensured by the supplier. The
properties specified (e.g. tannage, Shore hardness) serve only to
distinguish the different materials, if necessary.

7.3 Preparation of test pieces
Prepare peel and shear test pieces in accordance
with EN 1392 using the reference test materials
specified in 7.2 in the following combinations:

Leather 1/SBR 1
Leather 1/Leather 2
SBR 1 /SBR 1
SBR 2 /SBR 2
NBR
/NBR
SBSR /SBSR
PVC
/PVC

4

Use the assembly of leather 1/SBR 1 to evaluate the
suitability of the adhesive for bonding upper
leather, the most widely used upper material in the
shoe industry.
For the evaluation of the adhesive for bonding all
other reference test materials specified in 6.2
having a higher inherent strength than leather 1
(leather 2, SBR 1, SBR 2, NBR, SBSR, and PVC)
use test pieces prepared from two strips of the same
reference test material.
To carry out the creep test (see 7.1.3) at (50 ± 2) °C,
depending on the polymer base of the adhesive
under test, prepare leather 1/SBR 1 test pieces
(e.g. for polychloroprene adhesives) or
leather 1/PVC test pieces (e.g. for polyurethane
adhesives).
7.4 Storage of test pieces
Before testing, store all test pieces as specified

in 6.3.
Store test pieces for measuring the minimum
requirements in compliance with 6.3.3 for 3 days
to 5 days and in compliance with 6.3.5 for 5 days
to 7 days in the standard atmosphere of 23/50 in
accordance with ISO 554 before warming up
to (50 ± 2) °C in an oven or in a warm air cabinet
respectively.

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

7.5 Procedures and evaluation
In accordance with EN 1392.

8 Test report
The test report shall include:
a) a reference to this European Standard;
b) a complete identification of the adhesive used
(see 6.2), particularly the name and/or
designation, manufacturer, lot number and/or
manufacturing date, type of adhesive, adhesive
base polymer type, and mixing proportions in the
case of multi-part adhesives;
c) designation of the reference test materials used
(see 7.2), the preparation of the bonding surfaces
in accordance with EN 1392 and, if used,
identification of the halogenation agent,
particularly the name and/or designation,
manufacturer, lot number, number of parts,
solvent (if known) and date of expiry;

d) a detailed description of the bonding procedure
in accordance with EN 1392, particularly the
number of adhesive coats applied with
intermediate drying times, the heat activation
temperature used, and all operations not
specified in this European Standard;
e) a description of the conditions of storage of test
specimens;

© BSI 05-1999


Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:03:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI

EN 522:1998

f) test results, individual and mean values and
mode of failure in accordance with EN 1392;
g) all factors which have affected the results;
h) classification of the adhesive in accordance
with clause 9;
i) date of test.

9 Adhesive classification
9.1 General
Where tests have been carried out on various
standard reference test materials as specified in 7.2
and satisfactory results obtained in compliance
with 6.3.1 to 6.3.5 the adhesive shall be regarded as
being generally suitable for bonding those types of

material.
NOTE The test results obtained with test material are not
necessarily applicable to similar shoe materials. The actual
leather or footwear material to be used should be tested with the
adhesive to ensure that minimum requirements specified in 6.3
are met.

9.2 Adhesive classes
The adhesives shall be classified in accordance with
the test results obtained with test pieces prepared
from the reference test materials.
An adhesive shall be suitable for bonding a class of
material listed in Table 1, provided that the results
for test specimens prepared from this material meet
or surpass the minimum requirements specified
in 6.3.1 to 6.3.4. In addition the results for test
pieces of leather 1/SBR 1 or leather 1/PVC shall
comply with the minimum requirements given
in 6.3.5.
Table 1 — Adhesive classes and codes
Test pieces

Class

Code

Leather/SBR 1

Leather 1

L1

Leather 1/Leather 2

Leather 2

L2

SBR 1/SBR 1

SBR 1

SBR 1

SBR 2/SBR 2

SBR 2

SBR 2

NBR/NBR

NBR

NBR

SBSR/SBSR

SBSR

SBSR

PVC/PVC

PVC

PVC

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ
NOTE An adhesive should be included in each class for which
it completely meets the five minimum requirements.

© BSI 05-1999

5


BS EN
522:1998

BSI — British Standards Institution

Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:03:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI

BSI is the independent national body responsible for preparing
British Standards. It presents the UK view on standards in Europe and at the
international level. It is incorporated by Royal Charter.
Revisions
British Standards are updated by amendment or revision. Users of
British Standards should make sure that they possess the latest amendments or

editions.
It is the constant aim of BSI to improve the quality of our products and services.
We would be grateful if anyone finding an inaccuracy or ambiguity while using
this British Standard would inform the Secretary of the technical committee
responsible, the identity of which can be found on the inside front cover.
Tel: 020 8996 9000. Fax: 020 8996 7400.
BSI offers members an individual updating service called PLUS which ensures
that subscribers automatically receive the latest editions of standards.
Buying standards
Orders for all BSI, international and foreign standards publications should be
addressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001.
In response to orders for international standards, it is BSI policy to supply the
BSI implementation of those that have been published as British Standards,
unless otherwise requested.
Information on standards

ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ

BSI provides a wide range of information on national, European and
international standards through its Library and its Technical Help to Exporters
Service. Various BSI electronic information services are also available which give
details on all its products and services. Contact the Information Centre.
Tel: 020 8996 7111. Fax: 020 8996 7048.
Subscribing members of BSI are kept up to date with standards developments
and receive substantial discounts on the purchase price of standards. For details
of these and other benefits contact Membership Administration.
Tel: 020 8996 7002. Fax: 020 8996 7001.
Copyright
Copyright subsists in all BSI publications. BSI also holds the copyright, in the
UK, of the publications of the international standardization bodies. Except as

permitted under the Copyright, Designs and Patents Act 1988 no extract may be
reproduced, stored in a retrieval system or transmitted in any form or by any
means – electronic, photocopying, recording or otherwise – without prior written
permission from BSI.

This does not preclude the free use, in the course of implementing the standard,
of necessary details such as symbols, and size, type or grade designations. If these
details are to be used for any other purpose than implementation then the prior
written permission of BSI must be obtained.

BSI
389 Chiswick High Road
London
W4 4AL

If permission is granted, the terms may include royalty payments or a licensing
agreement. Details and advice can be obtained from the Copyright Manager.
Tel: 020 8996 7070.