Patent ID: 11896932
Assignee: ENTEGRIS, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B | IPC B

Claim 10:
11. A filter component comprising:
a filtration membrane comprising:
a porous fluoropolymer membrane,
thermally stable ionic groups, at least one ionic group-containing reactive compound, and at least one nonionic group-containing reactive compound grafted to the porous fluoropolymer membrane, and
an edge; and
a fluoropolymer end piece, wherein the edge of the filtration membrane is potted to the end piece with a melt-processable fluoropolymer to provide a fluid-tight seal along the edge, and
wherein, after exposure of the filtration membrane to a temperature of at least 240 degrees Celsius for a time sufficient to soften the melt-processable fluoropolymer so that the edge of the filtration membrane is potted to the end piece, the filtration membrane contains at least 50 percent of an amount of ionic groups present on the filtration membrane before the exposure.