FilmTec Corporation was a US company established in Minnesota in 1977 that specialized in manufacturing the then new thin-film composite membranes used in water treatment applications.In August 1984, the company was acquired by Dow Chemical Company forming its Dow Water & Process Solutions business unit. In August 2017, FilmTec Corporation moved to DowDuPont, the company resulting from the merger of Dow and DuPont. On 2019, after the spin-offs of Dow and Corteva, FilmTec remained now part of DuPont Water Solutions, which is currently among the world's main membrane manufacturers.