1、September 2009DEUTSCHE NORM English price group 11No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 59.140.30!$Yx4“15485
2、17www.din.deDDIN EN ISO 11644Leather Test for adhesion of finish (ISO 11644:2009)English version of DIN EN ISO 11644:2009-09Leder Prfung der Haftfestigkeit von Zurichtungen (ISO 11644:2009)Englische Fassung DIN EN ISO 11644:2009-09SupersedesDIN EN ISO 11644:2004-01www.beuth.deDocument comprises 17 p
3、agesDIN EN ISO 11644:2009-09 National foreword This standard has been prepared by Technical Committee ISO/TC IULTCS “International Union of Leather Technologists and Chemists Societies” in collaboration with Technical Committee CEN/TC 289 “Leather” (Secretariat: UNI, Italy). The responsible German b
4、ody involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Technical Committee NA 062-05-51 AA Anforderungen und Physikalische Prfverfahren fr Leder und seine Ausgangsprodukte. The DIN Standards corresponding to the International Standards referre
5、d to in this document are as follows: ISO 105-A02 DIN EN 20105-A02 ISO 2418 DIN EN ISO 2418 ISO 2419 DIN EN ISO 2419 ISO 3696 DIN ISO 3696 Amendments This standard differs from DIN EN ISO 11644:2004-01 as follows: a) Specifications for single-component adhesives have been added. b) The test methods
6、have been updated. c) A grey scale for assessing change in colour may be used. Previous editions DIN EN ISO 11644:2004-01 National Annex NA (informative) Bibliography DIN EN 20105-A02, Tests for colour fastness of textiles Part A02: Grey scale for assessing change in colour DIN EN ISO 2418, Leather
7、Chemical, physical and mechanical and fastness tests Sampling location DIN EN ISO 2419, Leather Physical and mechanical tests Sample preparation and conditioning DIN ISO 3696, Water for analytical laboratory use Specification and test methods 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS
8、O 11644 May 2009 ICS 59.140.30 Supersedes EN ISO 11644:2003 English Version Leather Test for adhesion of finish (ISO 11644:2009) Cuir Essai dadhrence du finissage (ISO 11644:2009) Leder Prfung der Haftfestigkeit von Zurichtungen (ISO 11644:2009) This European Standard was approved by CEN on 6 May 20
9、09. 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
10、on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management C
11、entre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Pol
12、and, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by
13、any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11644:2009: EISO 11644:2009(E) Contents PageForeword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions5 4 Principle5 5 Apparatus and materials.6 6 Preparation of test specimens .8 7 Conditioning of the t
14、est specimens.9 8 Procedure .10 9 Test report 13 Annex A (informative) Commercial sources for apparatus and materials 14 Annex B (informative) Precision data from interlaboratory collaborative trial. .15 2.DIN EN ISO 11644:2009-09 EN Foreword This document (EN ISO 11644:2009) has been prepared by Te
15、chnical Committee CEN/TC 289 “Leather”, the secretariat of which is held by UNI, in collaboration with Technical Committee ISO/TC IULTCS “International Union of Leather Technologists and Chemists Societies“. This European Standard shall be given the status of a national standard, either by publicati
16、on of an identical text or by endorsement, at the latest by November 2009, and conflicting national standards shall be withdrawn at the latest by November 2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC sh
17、all not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 11644:2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, B
18、ulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. 3DIN EN ISO 11644:2009-0
19、9 EN ISO 11644:2009(E) ISO 11644:2009(E) Introduction Prior to the first edition of this International Standard in 1993, a similar test method to that specified here, using an expoxy adhesive and metal adherent-plates had been in use in the leather trade for many years, but was never declared an off
20、icial method by IULTCS or ISO. The adhesive frequently penetrates thin finish films, thus increasing the adhesion value unrealistically, and it is usually not possible to measure wet adhesion, as there is insufficient adhesion to the metal when water is present. Finishes with insufficient adhesion t
21、o the adhesive also occur quite frequently. In spite of these drawbacks, this old method was used regularly and was referred to in many specifications. The method specified in this International Standard eliminates most of these drawbacks. The adhesives used in this method harden quickly and there i
22、s no time for them to penetrate even quite thin finishes unless the finish has open cracks in it. While adhesion to most finishes is sufficient, a few cases still exist in which the adhesion is insufficient and either a different adhesive has to be used or the surface lightly roughened. As the adhes
23、ive does not penetrate, it is quite possible to test different layers of a multi-layer finish separately. Such a finish can be tested several times until all the layers have been removed from the leather. It would be advisable for specifications to make allowance for this fact. A strip of hard PVC i
24、s used as the adherent-plate; this gives good adhesion under wet conditions. Wet adhesion can therefore be measured easily. Experience has shown that this “real” wet-adhesion value is often lower, a fact that must also be considered when drawing up specifications based on this method. 4DIN EN ISO 11
25、644:2009-09 EN 1 Scope This International Standard specifies a method for measuring the adhesion of the finish to leather or the adhesion between two adjacent layers of the finish. The method is valid for all finished leathers with a smooth surface that can be bonded to an adherent-plate without the
26、 adhesive penetrating into the finish. Preliminary experiments might be necessary to determine whether these conditions are met. This test method is valid for finished leathers with a finish-coat thickness of at least 15 m. 2 Normative references The following referenced documents are indispensable
27、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. ISO 105-A02, Textiles Tests for colour fastness Part A02: Grey scale for assessing change in colour IS
28、O 2418, Leather Chemical, physical and mechanical and fastness tests Sampling location ISO 2419, Leather Physical and mechanical tests Sample preparation and conditioning ISO 3696, Water for analytical laboratory use Specification and test methods 3 Terms and definitions For the purposes of this doc
29、ument, the following terms and definitions apply. 3.1 adhesion force required to pull the leather away from its surface finish layer, the force being applied steadily, at an angle of about 90, to a rigid adherent-plate to which the finished side of the leather has been bonded 4 Principle The finishe
30、d side of part of a strip of leather is bonded to an adherent-plate by means of an adhesive film. Force is applied to the free end of the strip to peel the leather from the finish over a given distance, the finish layer remaining on the adherent-plate together with the film of adhesive. The force re
31、quired is measured and reported as the adhesion value of the finish. The test is usually carried out on specimens conditioned in a standard atmosphere before testing. If required, the test may additionally be carried out on wetted specimens or on specimens that have previously been subjected to othe
32、r treatments. 5DIN EN ISO 11644:2009-09 EN ISO 11644:2009(E) ISO 11644:2009(E) 5 Apparatus and materials 5.1 Tensile-testing machine, incorporating the following features: a) a force range appropriate to the specimen under test; b) a uniform speed of separation of the jaws of 100 mm/min 5 mm/min; c)
33、 suitable means for fixing the adherent-plate holder (5.3) and either the hook link (5.4) or clamp (5.5); d) provision for recording a force-distance diagram during the test. 5.2 Adherent-plate, comprising a piece of hard poly(vinyl chloride) (PVC), or another suitable material, measuring approximat
34、ely 70 mm 20 mm 3 mm, to which the leather specimen is bonded. PVC with a high infrared (IR) absorption is preferred. 5.3 Adherent-plate holder (see Figure 1), made of any suitable material, for holding the adherent-plate, to which the leather specimen has been bonded, in the lower clamp of the tens
35、ile-testing machine. Optionally, the plates can be held firmly by screws through the sides of the plate holder, see Figure 5. Dimensions in millimetres Figure 1 Adherent-plate holder ( 2 mm for 35 mm, otherwise 1 mm) Either: 5.4 Hook link, made of steel wire 1 mm to 2 mm in diameter, at least 200 mm
36、 long, for attaching the free end of the leather specimen to the upper clamp of the tensile-testing machine (see Figures 2 and 4). The length of the hook link ensures that the angle of peel always remains close to 90. Or: 5.5 Flat-jawed laboratory screw clamp (see Figure 3), suitable for clamping th
37、e leather sample with a suitable attachment for connecting the laboratory clamp to the upper jaw of the tensile-testing machine, see Figure 5. The length of this attachment should be approximately 250 mm long to ensure that the angle of peel remains close to 90. Alternatively, a flat-jawed device fi
38、tted directly to a tensile-testing machine, such that a peel angle of 90 can be maintained throughout the test, may be used. 5.6 Punch, suitable for making a hole 2 mm to 3 mm in diameter in the leather specimen, if using the hook link (5.4). 6DIN EN ISO 11644:2009-09 EN Dimensions in millimetres Fi
39、gure 2 Hook link Figure 3 Flat-jawed clamp 5.7 Adhesive, suitable for bonding the leather specimen to the adherent-plate. Types of adhesives found to give satisfactory, reproducible results are a single-component cyanoacrylate adhesive, of the instant adhesive type that hardens and bonds within a ve
40、ry short time to avoid penetration of the adhesive through the finish layer, and a two-component polyurethane adhesive, comprising a resin and a hardener. For the two-component adhesive, usually 20 g of solid resin is dissolved in 80 g of ethyl acetate and 5 g of hardener is added, unless otherwise
41、instructed by the supplier of the adhesive. The adhesive shall be used within 8 h of adding the hardener, unless otherwise instructed by the supplier. NOTE Examples of suitable adhesives available commercially are given in Annex A. 7DIN EN ISO 11644:2009-09 EN ISO 11644:2009(E) ISO 11644:2009(E) 5.8
42、 Infrared lamp or oven, capable of heating the adherent-plate (5.2) such that the adhesive is activated. This lamp (oven) is only required if the two-component adhesive is used. 5.9 Weight-piece, of mass approximately 4,5 kg, with a flat base. 5.10 Cleaning solvent, hexane or a mixture of alkanes bo
43、iling within the range of 40 C to 80 C (e.g. petroleum ether), for cleaning the surface of the adherent-plate and the finished side of the leather specimen before bonding. 5.11 Cutter, capable of cutting a specimen of 100 mm 2 mm 10 mm 1 mm from the leather with one stroke. 5.12 Apparatus for wettin
44、g the test specimen, comprising the elements specified in 5.12.1 to 5.12.3. This apparatus is only required when wetted leathers are to be tested. 5.12.1 Vacuum-desiccator vessel, or another glass container suitable for evacuation. 5.12.2 Vacuum pump, capable of evacuating the desiccator vessel (5.1
45、2.1) to approximately 5 kPa (50 mbar) within approximately 4 min. 5.12.3 Beaker, filled with distilled water at approximately 20 C, in which the test specimens (leather bonded to adherent-plate) can be completely submerged. 5.13 Grey scale for assessing change in colour, in accordance with ISO 105-A
46、02. (This is only required when the change in colour of the leather surface is to be assessed after undergoing the test and re-polishing). 5.14 Demineralized water, grade 3 in accordance with ISO 3696. 6 Preparation of test specimens 6.1 From the piece of leather to be tested, cut out, with one stro
47、ke of the cutter (5.11), strips measuring 100 mm 2 mm 10 mm 1 mm. Take at least four leather specimens, two with their long axis parallel to the backbone and two with their long axis at right angles to the backbone, for each leather specimen location and for each type of test specimen conditioning.
48、The adhesion of a finish to the leather may vary considerably, even within a single piece (skin, side, shoulder, etc.). If it is necessary to evaluate these variations, it is recommended that the leather specimens be taken not only from the positions specified in ISO 2418, but also from the shoulder
49、 and belly. NOTE For some types of shoe upper leather it might be desirable to use a wider specimen size and correspondingly wider adherent-plates. If another specimen size is used, this must be included in the test report. 6.2 If using the hook link system of removing the finish, then using the punch (5.6), make holes approximately 2 mm to 3 mm in diameter at each end of the centreline of each strip, about 5 mm from the end. Either: 6.3 For the two-component adhesive, attach the leather specimen to
