BS 903-0:2012 pdf download – Physical testing of rubber Part 0: General

BS 903-0:2012 pdf download – Physical testing of rubber Part 0: General 6 Usage 6.1 Application For the testing of rubber, the use of BS 903 and BS ISO test methods should always be considered before resorting to other methods or procedures. These methods are intended for use with small, laboratory test pieces taken either from specially prepared samples or test sheets or from fnished rubber products. In most instances, these test pieces are cut by dies or knives from a representative sample. In these cases attention is drawn to the procedures specifed in BS ISO 23529 as the method of preparation can affect test performance, especially where strength measurements are involved. For some tests, directly moulded test pieces are necessary or most appropriate. The test methods are applicable to unvulcanized and vulcanized rubber prepared from dry rubber or latex. Most, although not all, of the test methods described for vulcanized rubber are suitable for use with thermoplastic rubbers and their products. The scopes of many of the test methods have already been extended to include thermoplastic rubbers. The test methods are not intended for use with cellular rubber or with rubber-coated fabrics except where specifed, although several standards may be applied to some cellular rubber materials and products. Dedicated test methods for fexible cellular materials are given in BS 4443 and in several BS ISO and BS EN standards, whilst dedicated methods for coated fabrics are given in BS 3424 (all parts) and several BS ISO and BS EN standards. 6.2 Selection of test method Detailed guidance on the selection and use of laboratory-scale tests is given in BS 903-1. Many of the methods give options for test piece size and shape, test procedure, test environment and, where appropriate, test duration. For example, heat ageing tests conducted in accordance with BS ISO 188 may be carried out at one or more of several standard or recommended test temperatures and times. Such options should be selected to suit the particular application, and in all cases the conditions used should be specifed and reported. The size of sample or product, the overall test time, the anticipated service environment and, for example, whether or not the test is for quality control or type approval purposes should be considered. Attention is drawn to BS ISO 24453 and BS ISO 24454 on the acquisition and presentation of comparable test data. These standards specify test...