Copolymer of tetrafluoroethylene and trifluoro(heptafluoropropoxy)ethylene, containing 3,2 % or more but not more than 4,6 % by weight of trifluoro(heptafluoropropoxy)ethylene and less than 1 mg/kg of extractable fluoride ions
Tetrafluoroetüleeni ja trifluoro(heptafluoropropoksü)etüleeni kopolümeer, mis sisaldab trifluoro(heptafluoropropoksü)etüleeni vähemalt 3,2 %, kuid mitte üle 4,6 % massist ja alla 1 mg/kg ekstraheeritavaid fluoriidioone