EN 26922:1993

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Klebstoffe - Bestimmung der Zugfestigkeit von Stumpfklebungen (ISO 6922:1987)Adhésifs - Détermination de la résistance en traction des joints a bout (ISO 6922:1987)Adhesives - Determination of tensile strength of butt joints (ISO 6922:1987)83.180LepilaAdhesivesICS:Ta slovenski standard je istoveten z:EN 26922:1993SIST EN 26922:1998en01-februar-1998SIST EN 26922:1998SLOVENSKI
STANDARD



SIST EN 26922:1998



SIST EN 26922:1998



SIST EN 26922:1998



INTERNATIONAL STANDARD INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION MEXflYHAPOflHAfl OPI-AHM3AL/Mfl I-IO CTAH~APTM3A~MM Adhesives - Determination of tensile strength of butt joints Adhksifs - Determination de Ia rksistance en traction des joints 21 bout ISO 6922 First edition 1987-12-15 Reference number ISO 6922 : 1987 (E) SIST EN 26922:1998



Foreword 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. Esch member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 6922 was prepared by Technical Committee ISO/TC 61, Plas tics. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. 0 International Organization for Standardization, 1987 Printed in Switzerland SIST EN 26922:1998



INTERNATIONAL STANDARD ISO 6922 : 1987 (E) Adhesives - Determination of tensile strength of butt joints 1 Scope and field of application This International Standard specifies a method for determining the bond strength of a butt joint when subjected to tensile forte. The method tan be applied to all types of adhesives. Although primarily intended for use under ambient conditions, the basic method tan also be applied to testing under a wide range of temperature and other environmental conditions. The method requires rigid adherends that tan be produced to the required dimensional tolerantes and that will withstand the forces applied to them during the test. 2 References ISO 291, Plastics - Standard a tmospheres for conditioning and tes ting. ISO/R 527, Plastics - Determination of tensile properties. ISO 3534, Statistics - Vocabulary and symbols. ISO 5393, Rubber and plastics test equipment - Tenside, flex- Ural and compression types konstant rate of traverse) - Descrip tion. ISO 6354, Adhesives - Vocabulary. 3 Principle A joint formed from two bar or rod adherends bonded by faces normal to their length is stressed to rupture by a tensile forte, applied through the long axis of the test specimen. The reported result is the observed forte at rupture. 4 Apparatus 4.1 Testing machine, so selected that the rupture of the specimen falls between 10 % and 90 % of the full-scale ca- pacity. In addition, the response time of the machine shall be short enough not to affect the accuracy with which the forte applied at the time of rupture tan be measured. The recorded forte shall not differ from the true applied forte by more than 1 %. The machine shall be capable of applying a tensile forte that increases at a steady rate (sec the note). lt shall be pro- vided with a suitable pair of self-aligning grips to hold the specimen. The grips shall be so constructed that they will move into alignment with the test specimen as soon as the load is applied so that the long axis of the test specimen will coincide with the direction of the applied forte through the centre-line of the grip assembly. NOTE - If the equipment does not allow for constant rate of load application, use a rate of jaw Separation that approximates the rate of loading (sec ISO/R 527). 4.2 Jig, for accurately aligning the adherends during bond- ing. An example of a simple jig is shown in the figure. SIST EN 26922:1998



ISO 6922: 1987 (E) Figure - Example of suitable simple jig for butt joint assembly NOTES 1 In the jig shown, first adjust the Position of end ‘B’ so that any fillet of adhesive forced from the joint coincides with the groove. 2 Then adjust end ‘A’ so that, with the joint in Position, the spring will exert the required pressure. 3 Then withdraw the pressure pad by turning the wing nut and insert the joint. Slacken the wing nut so that the full spring pressure is applied to the joint. 5 Test specimens 5.1 Adherends 5.1.1 For purposes of comparison of adhesives and for inter- laboratory testing, the two adherends shall be of identical material and shall be strong enough to prevent appreciable deformations. For other purposes, the two adherends may differ. 5.1.2 Unless othetwise specified, the d adherends sha I be as follows: imens ions of the - for circular sections: diameter IO, 15, 25 or 50 mm; - for Square sections: length of side of Square 10, 15, 25 or 50 mm. The tolera
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