Patent ID: 9120912
Filing Date: 2015-09-01
Classification: A61L,C08J,C08K

Abstract:
1. An irradiated fluoropolymer article having low leachable fluoride ions comprising at least one fluoropolymer composition layer that will contact a fluid, wherein said fluoropolymer composition comprises a blend of at least one fluoropolymer selected from the group consisting of a polyvinylidene fluoride polymer having greater than 70 percent by weight of vinylidene fluoride monomer units, and polyethylene trifluoroethylene and from 50 to 50,000 ppm of at least one metal salt or a metal oxide, and wherein said fluoropolymer article has low leachable fluoride ions as determined by forming said fluoropolymer composition into a 2 mil thick bag, irradiating said bag with 25-50 KGray of gamma radiation, filling said bag with a 80% strill water for injection/20% ethanol solution, with a surface to liquid volume ratio of 2.2 l/cm for 14 days at 40° C., with the measured extracted fluoride ion being less than 10 ppm, and wherein said fluoropolymer composition contains less than 5 weight percent of additives selected from the group consisting of pigments, dyes, fillers, surfactants, flame retardants, antioxidants, heat stabilizers and polymers that are non-fluoropolymers.