D - Textiles – Paper – 06 – M
Patent
D - Textiles, Paper
06
M
D06M 15/15 (2006.01) B01D 39/16 (2006.01) D06M 15/61 (2006.01)
Patent
CA 2289883
A cationically charge-modified fiber which includes amphiphilic macromolecules adsorbed onto at least a portion of the surface of a hydrophobic polymer fiber, and a crosslinkable, functionalized cationic polymer associated with at least a portion of the amphiphilic macromolecules, in which the functionalized cationic polymer has been crosslinked. Crosslinking may be accomplished by treating the resulting coated fibrous filter with a crosslinking agent, or with heat at a temperature and for a time sufficient to crosslink the functionalized cationic polymer. The amphiphilic macromolecules may be milk protein macromolecules. The functionalized cationic polymer contains a plurality of positively charged groups and a plurality of other functional groups which are capable of being crosslinked chemically or by the application of heat, such as epichlorohydrin- functionalized polyamines and epichlorohydrin-functionalized polyamido-amines. The present invention also provides a fibrous filter which includes a plurality of the cationically charge-modified hydrophobic polymer fibers described above. The present invention further provides a method of preparing a fibrous filter. The method involves providing a fibrous filter which includes hydrophobic polymer fibers, passing a solution containing amphiphilic macromolecules through the fibrous filter under shear stress conditions to give an amphiphilic macromolecule-coated fibrous web, passing a solution of a functionalized cationic polymer through the amphiphilic macromolecule-coated fibrous web to give a functionalized cationic polymer-coated fibrous web, and crosslinking the functionalized cationic polymer.
Gadsby Elizabeth Deibler
Lyng Robert John
Mcgrath Kevin Peter
Myers David Lewis
Wei Ning
Borden Ladner Gervais Llp
Kimberly-Clark Worldwide Inc.
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