Polymeric microfibrous filter sheet, preparation and use

Details Polymeric microfibrous filter sheet, preparation and use Polymeric microfibrous filter sheet, preparation and use

B - Operations, Transporting

01

D

182/123, 117/183

B01D 39/16 (2006.01) A61L 2/02 (2006.01) B01D 39/08 (2006.01) C02F 1/28 (2006.01)

Patent

CA 1248418

Abstract: Microfibrous, polymeric filter sheets and filter elements prepared therefrom comprised of a normally hydrophobic, microfibrous, polymeric web, wherein the surfaces of the microfibers making up the web are coated with a cured, precipitated, cationic, thermo- setting binder resin or polymer. The filter sheet is further characterized by being hydrophilic and having a positive zeta potential. The process for preparing such filter sheets comprises four steps: (1) applying a first solution or dispersion of a precipitating agent to a hydrophobic web to at least partially wet the web; (2) applying a second solution of the binder resin or polymer to the wetted web of step (1); (3) working the wetted web of step (2) to mix the first and second solutions, thereby facilitating the precipitation of the binder resin or polymer and the distribution of the precipitated binder resin or polymer as a coating on the surface of the micro- fibers making up the worked web; and (4) drying and curing the coated web of step (3) to form the desired filter sheets. The filter sheets have enhanced mechanical strength, are hydrophilic, have positive zeta poten- tials over the pH range of from about 3 to about 10 and typically have absolute pore ratings of from about 0.5 to about 80 micrometers.

431856

Affiliated with

Also associated with

Rating

Polymeric microfibrous filter sheet, preparation and use does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polymeric microfibrous filter sheet, preparation and use, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymeric microfibrous filter sheet, preparation and use will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1233471