BS ISO 36-2020 Rubber, vulcanized or thermoplastic – Determination of adhesion to textile fabrics

BS ISO 36-2020 Rubber, vulcanized or thermoplastic – Determination of adhesion to textile fabrics. 10 Conditioning of test pieces and temperature of test Condition all test pieces in accordance with ISO 23529. If the preparation of test pieces involves buffing, the interval between buffing and testing shall be not less than 16 ii and not greater than 72 h. For tests at a standard laboratory temperature (see ISO 23529). test pieces that do not require further preparation may be tested immediately, if cut from conditioned test samples. Where additional preparation is involved, a minimum conditioning period of 3 h at a standard laboratory temperature shall be allowed. For tests at temperatures other than a standard laboratory temperature, condition the test pieces at the temperature at which the test is to be conducted for a period sufficient to enable the test pieces to attain substantial equilibrium in accordance with ISO 23529. 11 Procedure Take the test piece as described in Zi or 72. For test pieces taken from a product, separate a ply of fabric or a rubber layer by hand for a distance of approximately 50 mm. The use of a scalpel or similar implement might be necessary to initiate the separation. Fix the separated ends of the test piece in the grips of the test machine (&1) and adjust so that the tension is distributed uniformly and so that no twisting of the test piece will occur during the test. Place the body of the test piece in the non-driven grip and the ply to be separated in the power-driven grip so that the angle of separation Is approximately 1800. It is important to ensure that the strips of test piece held in the grips lie in the same plane. Start the machine and continue the ply separation while recording on the chart recorder or in the memory of the computer (see &Z) the force values over a length separation of at least 100 mm. The rate of travel of the power-driven grip shall be 50 mm/mm ± 5 mm/mm. Examine the separated pieces for separation or failure. 12 Expression of results 12.1 Calculate the adhesion strength of the test piece by dividing the separation force, determined in accordance with ISO 6133:2015 using method A, B, C, D or E, as appropriate to the trace, by the width of the test piece. Report the result as the median of...