NTERNATIONAL STANDARD (TSO 3038 Corrugated fibreboard - Determination of the water resistance of the glue bond by immersion Carton ondule - Détermination par immersion de la resistance a I'eau des lignes de collage First edition - 1975-05-01 ISO 3038-1975 (E) UDC 676.273.3 : 676.017.63 Ref. No. 1SO 3038-1975 (E) Descriptors : corrugated cardboards, tests, adhesion tests, submerging tests. Price based on 4 pages Not for Resale FOREWORD Iso (the International Organization for Standardization) is a worldwide federation of national standards institutes (ISO Member Bodies). The work of developing International Standards is carried out through ISO Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set governmental and non-governmental, in liaison with isO, also take part in the work. Draft International Standards adopted by the Technical Committees are circulated the Member Bodies for approval before their acceptance as International to Standards by the ISO Council. International Standard ISO 3038 was drawn up by Technical Committee ISO/TC 6, Paper, boardand pulps,and circulated to the Member Bodies in January 1973 It has been approved by the Member Bodies of the following countries : Belgium India Spain Bulgaria Ireland Sweden Israel Switzerland Czechoslovakia Egypt, Arab Rep. of New Zealand Thailand Norway Finland Turkey Poland France United Kingdom Germany Romania U.S.S.R. Hungary South Africa, Rep. of The Member Body of the following country expressed disapproval of the document on technical grounds : Canada @ International Organization for Standardization, 1975 : Printed in Switzerland Copyrightlinternational Organization for Standardization icense from IHS Not for Resale ISO 3038-1975 (E) INTERNATIONAL STANDARD Corrugated fibreboard - Determination of the water resistance of the glue bond by immersion 5.7 Punch pliers. 1 SCOPE This International Standard specifies an immersion method 5.8 Eyelet pliers and eyelets. for determining the water resistance of the glue bond of corrugated fibreboard. 5.9 Piece of copper, fitted with a hook or a gripper, having total mass of 250 ± 1 g per test piece. A piece of a different 2 FIELD OF APPLICATION metal may be used provided that corrections are made to the hydrostatic weight. This method is applicable to all types of corrugated fibreboard and in particular to corrugated fibreboards in 5.10 Adhesive tape, pressure sensitive, 20 to 30 mm which a high degree of resistance to wet conditions is width, and resistant to water under the conditions of the required. test. 3 REFERENCE ISO/R 186, Method of sampling paper and board for 6SAMPLING testing. be carried out in accordance with Sampling shall ISO/R 186. 4 PRINCIPLE Individual samples shall be large enough to permit the Measurement of the length of time during which a cutting of five test pieces of 20 ± 1 mm by 150 mm (i.e. at predetermined combination of glue lines, immersed in least 100 mm X 150 mm), with the flutes at right angles to water, resists the pull of a suspended weight in the plane the length of the test piece. vertical axis of the corrugated fibreboard, perpendicular to The corrugated fibreboard to be tested shall generally be 3 the glue lines. days old to allow it to develop its water-resistance properties. The time will be dependent on temperature and adhesive formulation. 5 APPARATUS 5.1 Water tank, preferably made of glass for easy observation, large enough for the free suspension of the required number of test pieces and having a depth of not 7 PREPARATION OF TEST PIECES less than 250 mm. The bottom of a glass tank may be lined Mark at least five specimens of the corrugated fibreboard with a rubber sheet to prevent damage. with the rubber stamp (5.4) and cut out the five test pieces from each specimen, taking care not to damage the glue 5.2 Rods or bars, with hooks, placed across the tank for bond. Unless otherwise agreed, test pieces shall be free from suspension o