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US 3,998,690 AGranted
Fibrous assemblies from cationically and anionically charged fibers
AssigneeThe Procter & Gamble Company
InventorsWarren Irl Lyness, Robert Andrew Gloss, Norman Andrew Bates
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Abstract
Fibrous assemblies, such as paper, having advantageous properties related to bulk, absorbency, and compaction resistance are obtained from discrete fiber aggregates by a process which comprises contacting a slurry of anionically charged fibers with a slurry of cationically charged fibers to form said discrete fiber aggregates and thereafter forming fibrous assemblies by conventional processes.
Claims6
A process for the preparation of fibrous assemblies comprising the steps of:
- a. forming separate anionically charged and cationically charged slurry aliquots of a single slurry stock, wherein said cationically charged aliquot is prepared from fibers treated at a level of from about 0,1% to about 10.0%, fiber dry weight basis, with a cationic fiber-substantive agent and wherein said anionically charged aliquot is prepared from like fibers treated at a level of from about 0.1% to about 10.0%, fiber dry weight basis, with an anionic fiber-substantive agent;
- b. mixing said anionically charged aliquot and said cationically charged aliquot in a mixing zone, simultaneously or immediately thereafter;
- c. collecting the resulting discrete fiber aggregates;
- and
- d. draining and drying said aggregates.
2 more elements
A process for the production of cellulosic fibrous assemblies comprising the steps of:
- a. forming separate anionically charged and cationically charged slurry aliquots of a single slurry stock, wherein said cationically charged aliquot is prepared from fibers treated at a level of from about 0.1% to about 10.0%, fiber dry weight basis, with a cationic cellulose fiber-substantive agent selected from the group consisting of metal salts, quaternary ammonium salts, urea-formaldehyde resin, melamine-formaldehyde resin, polyalkylene polyamines, polyamides, polyamide-epichlorohydrin reaction products, and polyalkylene polyamine-polysaccharide reaction products, and wherein said anionically charged aliquot is prepared from fibers treated at a level of from about 0.1% to about 10.0%, fiber dry weight basis, with an anionic cellulose fiber-substantive agent selected from the group consisting of bentonite, carboxylated polysaccharides, polycarboxylic acids and anhydrides thereof and ethoxylated alcohol sulfates and sulfonates;
- b. mixing said anionically charged aliquot and said cationically charged aliquot in a mixing zone, simultaneously or immediately thereafter;
- c. sheeting the resulting discrete fiber aggregates;
- and
- d. draining and drying said aggregates.
2 more elements
A cellulosic fibrous assembly comprising fiber aggregates formed by:
- a. forming separate anionically charged and cationically charged slurry aliquots of a single slurry stock, wherein said cationically charged aliquot is prepared from fibers treated at a level of from about 0.1% to about 10.0%, fiber dry weight basis, with a cationic cellulose fiber-substantive agent selected from the group consisting of metal salts, quaternary ammonium salts, urea-formaldehyde resin, melamine-formaldehyde resin, polyalkylene polyamines, polyamides, polyamide-epichlorohydrin reaction products, and polyalkylene polyamine-polysaccharide reaction products, and wherein said anionically charged aliquot is prepared from fibers treated at a level of from about 0.1% to about 10.0%, fiber dry weight basis, with an anionic cellulose fiber-substantive agent selected from the group consisting of bentonite, carboxylated polysaccharides, polycarboxylic acids and anhydrides thereof, and ethoxylated alcohol sulfates and sulfonates;
- b. mixing said anionically charged aliquot and said cationically charged aliquot in a mixing zone, simultaneously or immediately thereafter;
- c. sheeting the resulting discrete fiber aggregates;
- and
- d. draining and drying said aggregates.
2 more elements
Dependencies are inferred from the claim text.