JSA JIS K 6261-2

Abstract

This Standard specifies a method for determining the brittle temperature of the rubber materials based on the state of brittle failure of test pieces when they are impacted under specified conditions. Three procedures are described: Procedure A: determination of the brittleness temperature Procedure B: determination of the brittleness temperature for 50 % failure Procedure C: determination of the number of test pieces failing when impacted at a specified temperature NOTE 1 Procedure C is used in the classification of rubber materials and for specification purposes. NOTE 2 The temperatures determined by this test method do not necessarily relate to the lowest temperature at which the material can be used since the brittleness will be affected by the test conditions and especially by the level of impact. Data obtained by this method are, therefore, intended to be used to predict the behaviour of rubbers at low temperatures only in applications in which the conditions of deformation are similar to those specified in the test. The procedure most appropriate for the intended purpose of test shall be selected. NOTE 3 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows. ISO 812: 2011 Rubber, vulcanized or thermoplastic-Determination of low-temperature brittleness (MOD) In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1. WARNING 1 Persons using this Standard should be familiar with normal laboratory practice. This Standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this Standard to establish appropriate safety and health practices. WARNING 2 Certain procedures specified in this Standard might involve the use or generation of substances, or the generation of waste, that could constitute a local environmental hazard. Reference should be made to related laws and regulations on safe handling and disposal after use.