1、BRITISH STANDARDBS EN ISO 14678:2005Adhesives Determination of resistance to flow (sagging)The European Standard EN ISO 14678:2005 has the status of a British StandardICS 83.180g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54
2、g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 14678:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 20 October 2005 BSI 20 October 2005ISBN 0 580 46658 2National forewordThis British Standard is th
3、e official English language version of EN ISO 14678:2005. It is identical with ISO 14678:2005.The UK participation in its preparation was entrusted to Technical Committee PRI/52, Adhesives, which has the responsibility to: A list of organizations represented on this committee can be obtained on requ
4、est to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Ele
5、ctronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to
6、understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises
7、 a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii to v, a blank page, pages 1 to 27 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationA
8、md. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 14678July 2005ICS 83.180English versionAdhesives - Determination of resistance to flow (sagging) (ISO14678:2005)Adhsifs - Dtermination de la rsistance au fluage(coulure) (ISO 14678:2005)Klebstoffe - Bestimmung des Widerstande
9、s gegen Flieen(Sagging) (ISO 14678:2005)This European Standard was approved by CEN on 29 April 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-t
10、o-date lists and bibliographical references concerning such nationalstandards 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 translationunder th
11、e responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, I
12、reland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050
13、 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 14678:2005: EForeword This European Standard (EN ISO 14678:2005) has been prepared by Technical Committee CEN/TC 193 “Adhesives“, the secretariat of which is held by
14、AENOR, in collaboration with Technical Committee ISO/TC 61 “Plastics, Subcommittee SC 11, Products“. 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 February 2006, and conflicting national standar
15、ds shall be withdrawn at the latest by February 2006. 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
16、, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom EN ISO 14678:2005Reference numberISO 14678:2005(E)INTERNATIONAL STANDARD ISO14678First edition2005-08-15Adhesives
17、 Determination of resistance to flow (sagging) Adhsifs Dtermination de la rsistance au fluage (coulure) EN ISO 14678:2005ii iii Contents Page Foreword.iv1 Scope 1 2 Normative references 1 3 Terms and definitions .1 4 Guidance: Typical applications for the seven test methods are as follows: 2 5 Sampl
18、ing.2 6 Safety 2 7 Method 1: Use of an applicator to apply a wet film2 8 Method 2: Use of a plug former6 9 Method 3: Use of a scraper.11 10 Method 4: Use of test blocks 13 11 Method 5: Flow from a lap joint17 12 Method 6: Flow of adhesive through a hole20 13 Method 7: Flow of structural adhesive fil
19、ms.21 Introductionv EN ISO 14678:2005ivForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member bod
20、y interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrote
21、chnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by
22、 the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rig
23、hts. ISO shall not be held responsible for identifying any or all such patent rights. ISO 14678 was prepared by the European Committee for Standardization (CEN) in collaboration with Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products, in accordance with the Agreement on tec hnical
24、 cooperation between ISO and CEN (Vienna Agreement). T hroughout the text of this document, read “.this European Standard.” to mean “.this International Stan dard.”. EN ISO 14678:2005vEN ISO 14678:2005Introduction When an adhesive joint is prepared, it is important that the applied adhesive does not
25、 flow away from the area of the joint. Flow can occur before the joint has been assembled, e.g. before solvent or water has evaporated, or after the joint has been closed, but before the adhesive has set, e.g. during the curing, solidification, or drying process. The flow of an applied adhesive will
26、 be influenced by the stress applied and the duration and temperature of the bonding process. The extent of flow of an adhesive will also be influenced by the surface energies involved and the degree of roughness of the adherents. The occurrence of flow under gravity is called sagging (see Clause 3)
27、. This European Standard describes three types of test for the assessment of sagging. In the first type of test, which simulates the conditions before joint assembly, the extent of flow of an adhesive down a surface which is either vertical (Methods 1, 2 and 3) or at 60 to the horizontal (Method 4)
28、is measured. In the second type of test, which simulates conditions after assembly (Methods 5 and 6), the flow of adhesive from a hole or slot is observed. The third type of test simulates conditions during the cure cycle for structural film adhesives (Method 7). The method appropriate to the type o
29、f adhesive and its consistency should be selected. blank11 Scope This European Standard describes seven methods for the assessment of the flow characteristics of adhesives after application at room temperature and during cure, by the measurement of sagging. These methods may be used both for specify
30、ing an adhesive and for quality control purposes. 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 an
31、y amendments) applies. EN 923:1998, Adhesives Terms and definitions EN 1067, Adhesives Examination and preparation of samples for testing EN 13887, Structural Adhesives - Guidelines for surface preparation of metals and plastics prior to adhesive bonding EN ISO 15605, Adhesives - Sampling (ISO 15605
32、:2000) 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 923:1998 together with the following apply. 3.1 flow deformation of an adhesive or adhesive layer 3.2 sagging downward movement of an adhesive film between the time of application and set
33、ting resulting in an uneven coating having a thick lower edge NOTE The resulting sagging is usually restricted to a local area of a vertical surface. EN ISO 14678:20052 4 Guidance: Typical applications for the seven test methods are as follows: * Method 1: Use of an applicator to apply a wet film (s
34、ee Clause 7) - Resistance to flow after application. * Method 2: Use of a plug former (see Clause 8) - Resistance to sagging after application. * Method 3: Use of a scraper (see Clause 9) to apply a film of adhesive - Resistance to flow after application during cure. * Method 4: Use of test blocks (
35、see Clause 10) to measure static flow of adhesives after application and during cure. * Method 5: Flow from a lap joint (see Clause 11) - Resistance to flow after application. * Method 6: Flow of adhesive through a hole (see Clause 12) - Resistance to dripping after application. * Method 7: Flow of
36、structural adhesive films (see Clause 13) - Resistance to flow during the cure cycle. 5 Sampling Take a sample of the product to be tested in accordance with EN ISO 15605. Examine and prepare this sample for testing in accordance with EN 1067, where applicable, depending on which of the seven test m
37、ethods is to be employed. 6 Safety Persons using this standard shall be familiar with normal laboratory practice. This standard does not purport to address all the safety problems, if any, associated with its use. It is responsibility of the user to establish safety and health practices and to ensur
38、e compliance with any European and national regulatory conditions. 7 Method 1: Use of an applicator to apply a wet film 7.1 Principle A wet film of the adhesive of defined thickness and shape is applied to a flat horizontal surface of a substrate using an applicator. After application the test panel
39、 is placed vertically in the test atmosphere for a specified time. The extent of sagging of the applied adhesive is measured (using the top edge of the test panel as a reference). 7.2 Supplementary information This method of test requires that the following supplementary information shall be specifi
40、ed when the method is performed: a) description of the test substrate; b) procedure for preparation of the test surface; c) details of the conditioning atmosphere; EN ISO 14678:20053d) details of the test atmosphere; e) temperature; f) method of mixing of two-component adhesives and the time between
41、 mixing and application; g) method of application of the adhesive and the applicator gap size; NOTE The wet film thickness given by an applicator is generally less than the depth of the gap. h) duration of the test. 7.3 Apparatus and materials 7.3.1 Test panel(s), of glass or other specified materia
42、l. Dimensions of approximately (300 200) mm are convenient. Sufficient panels to allow for three strips of adhesive of similar thickness are required. 7.3.2 Applicator(s), of different gap sizes (or stencils and suitable applicators, if the nature of the adhesive requires this apparatus). 7.3.3 Encl
43、osure(s), to provide the specified conditioning and/or test atmospheres. 7.4 Conditioning and pretreatment Cut test panels as required. Thoroughly clean each panel and carry out any specified pretreatment. Condition the adhesive and the prepared test panels (if required) in the specified conditionin
44、g atmosphere. NOTE If not otherwise specified, the recommended conditions are (23 2) C and (50 5) % RH. 7.5 Procedure Place a prepared test panel in a horizontal position and apply strips of the adhesive parallel to the longer edge (see Figure 1). Mark one of the longer edges as the reference edge a
45、nd, as quickly as possible, measure the distance in millimetres of the further edge of each strip from it. EN ISO 14678:20054 Key 1 Reference edge 2 Applicator 3 Test panel 4 Extruded strips Figure 1 Applicator for preparing adhesive strips (Method 1: Use of an applicator to apply a wet film) Taking
46、 care to avoid vibration, mount the test panel within 2 of the vertical so that the strips are horizontal and the reference edge is at the top (see Figure 2). Place the panel in the test atmosphere for the specified time and then determine the sagging of the adhesive by measuring the maximum distanc
47、e of flow of each strip from the reference edge. EN ISO 14678:20055Key 1 Reference edge 2 Line of lower edge of strip before test 3 Maximum distance of flow Figure 2 Flow of adhesive strips (Method 1: Use of an applicator to apply a wet film) NOTE The test panel may be reused only if the surface con
48、dition in the actual bonding process can be reproduced in the test. Repeat the test for at least three strips at each applicator gap size. 7.6 Expression of results For each strip calculate the sagging as the maximum difference in millimetres between the distance of the further edge of the strip fro
49、m the reference edge before and after the test. Express the result as the mean sagging in millimetres of the repeated tests at each specified applicator gap size. 7.7 Test report The report shall state the following: a) reference to this European Standard; b) all information necessary for the complete identification of the adhesive; EN ISO 14678:20056 c) items of supplementary information given in 7.2; d) result for each applicator gap depth; e) that the method of test complied with the requirements of this standard, i.e. Method 1, or if it did not, th
