www bzfxw com BRITISH STANDARD BS EN 522 1998 Adhesives for leather and footwear materials — Bond strength — Minimum requirements and adhesive classification The European Standard EN 522 1998 has the[.]
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 to 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 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 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 Scope Normative references Definitions Principle Safety Requirements Test methods Test report Adhesive classification Table — Adhesive classes and codes Page 3 3 3 4 5 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ © 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 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 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 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 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 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 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 after assembling shall not be less than 1,0 N/mm 6.3.2 The peel resistance after days to 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 days at (50 ± 2) °C and days to 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 days to 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 (“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 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 09:03:06 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 522:1998 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 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 Leather 1/Leather SBR /SBR SBR /SBR NBR /NBR SBSR /SBSR PVC /PVC Use the assembly of leather 1/SBR 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 (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 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 days to days and in compliance with 6.3.5 for days to 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 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 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 or leather 1/PVC shall comply with the minimum requirements given in 6.3.5 Table — Adhesive classes and codes Test pieces Class Code Leather/SBR Leather L1 Leather 1/Leather Leather L2 SBR 1/SBR SBR SBR SBR 2/SBR SBR SBR 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 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 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