BS ISO 36:2020 pdf download – Rubber, vulcanized or thermoplastic — Determination of adhesion to textile fabrics

BS ISO 36:2020 pdf download – Rubber, vulcanized or thermoplastic — Determination of adhesion to textile fabrics b) For non-product tests, the maximum time between vulcanization and test shall be four weeks, and for evaluations intended to be comparable the tests shall be carried out, as far as possible, after the same time-interval. c) For product tests, whenever possible, the time between vulcanization and testing shall not exceed three months. In other cases, tests shall be made within two months of the date of receipt of the product by the customer. 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 h 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 7.1 or 7.2. 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 (5.1) 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 180° . 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 5.2) the force values over a length separation of...