This International Standard establishes a nomenclature system for thermoplastic elastomers based onthe chemical composition of the polymer or polymers involved. It defines symbols and abbreviated termsused to identify thermoplastic elastomers in industry, commerce, and government. It is not intended toconflict with, but to supplement, existing trade names and trademarks.NOTE 1 The name of the thermoplastic elastomer should be used in technical papers and presentationsfollowed by the abbreviated term used to designate the elastomer in this International Standard.NOTE 2 Annex A gives thermoplastic-elastomer abbreviated terms that have been used in the past in materialsstandards, technical bulletins, textbooks, patents, and trade literature.