B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
B01D 69/10 (2006.01)
Patent
CA 2043224
TITLE A SEMI-PERMEABLE MEMBRANE PRODUCING APPARATUS INVENTORS André Y. Tremblay Thomas A. Tweddle Mauro M. Dal-Cin Oleh Kutowy ABSTRACT OF THE DISCLOSURE A semi-permeable membrane producing apparatus comprising a tensioned membrane backing sheet supplying device, a casting device for casting a casting solution coating on the backing sheet, a backing sheet cross cutting device, a coated backing sheet support, a solvent evaporating casing over the support, a gelation bath, and a variable speed take-up for drawing the backing sheet at the casting speed and, once the coated backing sheet is severed from the supply device, drawing the coated backing sheet into the gelation bath at a rapid entry rate of at least about 15 cm/second. The solvent evaporating casing contains a heater and fan for circulating heated or unheated gas over the coating for polymer migration enrichment of the coating towards its exposed surface by solvent evaporation. The same apparatus may be used with a different gelation bath for gelation to occur at the casting rate.
Dal-Cin Mauro M.
Kutowy Oleh
Tremblay Y. Andre
Tweddle Thomas A.
Anderson J. Wayne
Dal-Cin Mauro M.
Kutowy Oleh
Tremblay Y. Andre
Tweddle Thomas A.
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