![]() Furthermore, due to PTFEbeing a niche polymer, some of the standards – such as ASTM D 2240 – actually pertain to other materials and the test method is simply employed for PTFE. ![]() This is not a complete list: more options can be found in the standard. The below table is a list of commonly used rubber polymers used in the sealing industry. For a whole list of properties, the standards only tell you how to check the value, but do not make any recommendations on what those values should be. ASTM D1418 is commonly used to designate the correct polymer to be used in rubber compounds listed on material specification or part drawings. However, as the table below shows, very few of the standards actually give any values.
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