1、BRITISH STANDARD a Adhesives for leather and footwear materials - Lasting adhesives - Testing heat resistance of bonds at increasing temperature a The European Standard EN 12964:2001 has the status of a British Standard ICs 83.180 BS EN 12964:2001 a NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMIT
2、TED BY COPYRIGHT LAW BS EN 12964:2001 Amd. No. Date National foreword Comments This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15June2001 O BSI 0
3、6-2001 This British Standard is the official English language version of EN 12964:2001. The UK participation in its preparation was entrusted to Technical Committee PRU52, Adhesives, which has the responsibility to: - - aid enquirers to understand the text; present to the responsible European commit
4、tee 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-refe
5、rences 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 Cata
6、logue. 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 com
7、prises a front cover, an inside front cover, the EN title page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. ISBN O 580 37418 1 EUROPEAN STANDARD 0 NORME EUROPENNE EUROPISCHE NORM EN 12964 April 2
8、001 ICs 83.180 English version Adhesives for leather and footwear materials - Lasting adhesives - Testing heat resistance of bonds at increasing temperature Adhsifs pour cuir et matriaux pour articles chaussants - Adhsifs haute tnacit - Contrle de la rsistance la chaleur des joints une temprature le
9、ve Klebstoffe fr Leder und Schuhwerkstoffe - Zwickklebstoffe - Prfung der Wrmebestndigkeit von Klebungen bei steigender Temperatur This European Standard was approved by CEN on 1 March 2001 CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for gi
10、ving 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 Management Centre or to any CEN member. This European Standard exists in three official versi
11、ons (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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cze
12、ch Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. :. EUROPEAN COMMlTEE FOR STANDARDIZATION COMITE EUROPEEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue d
13、e Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12964:2001 E Page 2 EN 12964:2001 Contents Page Foreword 3 Scope 4 Normative references 4 Terms and definitions . 4 Principle 4 Safety 4 Apparatu
14、s . 4 Test material . 6 Test pieces . 6 Adhesive . 6 10 Procedures and evaluation . 1 0 11 Test report 10 Page 3 EN 12964:2001 Foreword O This European Standard has been prepared by Technical Committee CENTTC 193, “Adhesives“, the secretariat of which is held by AENOR. This European Standard shall b
15、e given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2001, and conflicting national standards shall be withdrawn at the latest by October 2001. According to the CENKENELEC Internal Regulations, the national standards organi
16、zations 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. Page 4 EN 12964:2001 1
17、 Scope This European standard specifies a method for determining the heat resistance of bonds produced by lasting adhesives. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appro
18、priate 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 public
19、ation referred to applies (including amendments). EN 923 Adhesives -Terms and definitions EN 1066 Adhesives - Sampling EN 1067 Adhesives - Examination and preparation of samples for testing IS0 554 Standard atmospheres for conditioning and/or testing - Specif ications 3 Terms and definitions For the
20、 purposes of this standard the terms and definitions in accordance with EN 923, and the following term and definition apply. 3.1 lasting adhesive adhesive used for bonding a shoe upper to a shoe insole during the lasting process. 4 Principle Strips of specified length and width are cut from a cotton
21、 canvas test material. The lasting adhesive to be tested is coated onto these strips and two strips are bonded to produce test pieces of a specified form. The heat resistance of the bonds is determined by heating the test pieces to cohesion (cohesive) failure in a warm air cabinet under a specified
22、constant load and at a temperature increasing at a rate of 2 “C/min. 5 Safety Persons using this standard shall be familiar with normal laboratory practice. This standard does not purport to address all safety problems, if any, associated with its use. It is the responsibility of the user to establi
23、sh safety and health practices and to ensure compliance with any European and national regulatory conditions. 6 Apparatus The items required will depend on the types of materials used: Page 5 EN 12964:2001 6.1 Cutting knife Sharp knife, for cutting test pieces in accordance with 9.3.2. The angle bet
24、ween the inner and outer cutting surface shall be approximately 20“; o 6.2 Hand brush For cleaning the surface of the test material; 6.3 Adhesive applicator To ensure a uniform and even coating of the adhesive under test using preferably the type of applicator recommended by the manufacturer of the
25、adhesive. Unless otherwise specified, for lasting adhesives supplied in liquid form use a brush, a roller or a coating machine, for solid lasting adhesives use an applicator equipped with a melting chamber and an applicator nozzle with the following requirements: a) The melting chamber shall heat th
26、e adhesive by an electric device to its application temperature (usually between 100 OC and 300 OC). The temperature of the nozzle shall be kept within * 5 OC of the specified temperature. b) The applicator shall allow the even distribution of the adhesive over the test piece surface. It shall inclu
27、de an air driven or mechanical system which produces a controlled dose of the melted adhesive. The use of a nozzle with several orifices is recommended as it facilitates the distribution of the melted adhesive over the whole surface of the test material. c) During application, the test material shal
28、l rest on a mobile carriage/ traveller which allows the application of the adhesive along the length of the test piece at a controlled speed. 6.4 Heat activator For heating adhesive coats to the required temperature. _. 6.5 Equipment for measurement of temperature Thermocouple, thermoindicator paper
29、s or melting powders for measuring the temperature of activated adhesive coats or a non-contact temperature measurement device. 6.6 Pressing device o Providing an even pressure of up to 0,6 MPa over the whole of the surface to be bonded; 6.7 Warm air cabinet With forced ventilation capable of mainta
30、ining temperatures between 25 OC and 300 OC with tolerances of * 2 OC and suitable for testing test pieces in accordance with clause 10. The test cabinet shall be fitted with a device for increasing temperature at a specified constant rate, a thermometer or a thermocouple for measuring temperature i
31、n the warm air cabinet, a window and devices for clamping 5 test pieces. These devices shall consist of upper clamps fixed on a metal bar in the cabinet and lower clamps which shall have means for attaching weights which pass through cylindrical holes in the base of the cabinet. All lower clamps sha
32、ll be of the same mass and capable of being loaded with weights so that total loads applied by the individual clamps are 1,0 kg, 2,O kg, 3,O kg, 4,O kg and 5,O kg; Page 6 EN 12964:2001 6.8 Weights With a tolerance of * 1 % for applying loads of 1,0 kg, 2,O kg, 3,O kg, 4,O kg and 5,O kg, including th
33、e weight of a clamp to the test pieces. a 7 Adhesive Identify the adhesive used completely in the test report, in particular note name and/or designation, manufacturer, date of manufacture/supply and/or lot number, type of adhesive (solvent-borne or hot melt adhesive), main polymer and colour. 8 Tes
34、t material Unless otherwise specified, use an unsized compact cotton canvas for testing. Completely identify the test material used. Record name and/or designation, manufacturer, date of manufacture/supply, type, details of threads and weight per unit area and other characteristics of the test mater
35、ial in the test report. 9 Test pieces 9.1 Form of test pieces Two strips of material up to (1 O0 2 2) mm long and (30 * 0,5) mm wide marked with lines across each strip at 30 mm, 40 mm and 70 mm in pencil or solvent resistant ink, bonded to cover each other over a length of at least 70 mm from the 3
36、0 mm marked line (Figure 1). I 100 I I 70 I I I H Figure 1 - Form and dimensions (in millimetres) of test pieces. 9.2 Number of test pieces Prepare for each test at least 5 test pieces, for carrying out the test in duplicate another 5 test pieces and, if pre- liminary creep tests are necessary for a
37、ssessing the test temperature, additionally 5 test pieces. Page 7 EN 12964:2001 9.3 Preparation of test pieces O 9.3.1 Conditioning of the test material Condition the test material to an equilibrium state in the standard atmosphere 23/50 in accordance with IS0 554. 9.3.2 Cutting of material strips W
38、hen cutting the materials for test pieces, the surface that is to be bonded shall be uppermost. The inner surface of the knife shall be at right angles to the plane of the material to be cut. The depth of the cut shall be greater than the thickness of the material being cut. NOTE It is recommended t
39、hat a thick sheet of paper be laid between the material and the cutting block. 9.3.3 Preparation of bonding surfaces Prepare the material surfaces in accordance with the instructions of the adhesive supplier. If there is no information available clean the surfaces to be bonded by a handbrush (6.2) s
40、o that they are free from contamination. 9.3.4 Preparation of the adhesive Take a significant sample of the adhesive to be tested in accordance with EN 1066 and examine and prepare it in accordance with EN 1067. Store the sample in a closed container at (23 f 2) OC until it has completely reached th
41、is temperature. 9.3.5 Application of liquid adhesives and bonding of test pieces Unless otherwise specified and recorded in the test report: - Weigh each prepared strip - Apply the adhesive (30 * 5) min after the preparation of the surface to be bonded (9.3.3) at a controlled temperature of (23 * 5)
42、 OC and relative humidity less than 70 %. Depending on the nature of the surface to be bonded apply two or more coats of adhesive in the length direction of the strips, using an appropriate device (6.3). - Coat the adhesive up to the 30 mm mark on the strips so that a 30 mm length is free from adhes
43、ive. Allow a drying interval of (30 f 5) min before applying the next coat, unless otherwise specified by the adhesive manufacturer. Reweigh each strip and calculate the total quantity of dry adhesive applied. - Record the quantity of adhesive applied, the number of coats, and the time between adhes
44、ive applications in the test report. - Between the application of the adhesive and the assembling of the two strips allow the final adhesive coat to dry for (30 * 5) min at a controlled temperature of (23 * 5) OC and a relative humidity of less than 70 Y!. - Activate the adhesive coats by using a he
45、at activator (6.4) ensuring that the optimum activation tempera- ture, usually (85 * 5) OC, is reached within 15 s. NOTE If the optimum activation temperature which ensures a full coalescence of the adhesive coat within the pressing time is unknown, preliminary tests should be made. - Determine the
46、surface temperature of the adhesive using any of the devices specified in 6.5. - Record the activation temperature measured, the device and how it was used in the test report. - Assemble two activated coats immediately after their removal from the heat activator carrying out all operations from the
47、end of activation to attainment of maximum pressure within 10 s. Page 8 EN 12964:2001 - Hold the bonded strips under a pressure of at least (0,6 * 0,02) MPa for 15 s. Ensure that the pressure is evenly distributed over the whole surface. 9.3.6 Application of solid adhesives and bonding of test piece
48、s Heat the applicator to a temperature which will allow adhesive remained from previous use to be flushed out. To do this, add some of the adhesive to be tested (previously cut to size if necessary), allow the adhesive to melt in the melting chamber and apply it to paper or other scrap material, unt
49、il it appears to be the same colour and free from pollutants. Repeat this process with further adhesive until the whole melting chamber is clean. Recharge the melting chamber and adjust it to the required application temperature. Apply a suitable amount of adhesive, in just one coat with the nozzle, to the area of the test piece to be bonded. Immediately place the other strip of material on top and apply sufficient pressure to achieve a homogeneous layer of adhesive, thickness approximately 0,4mm. The time from the start of the operation to the formation of the adhesiv
