High bulk calendered paper containing vesiculated beads

Details High bulk calendered paper containing vesiculated beads High bulk calendered paper containing vesiculated beads

D - Textiles, Paper

21

H

9/56

D21H 21/54 (2006.01) D21H 17/37 (2006.01) D21H 17/53 (2006.01) D21H 17/69 (2006.01)

Patent

CA 1286061

HIGH BULK CALENDERED PAPER CONTAINING VESICULATED BEADS ABSTRACT A high bulk calendered paper comprises from 2% to about 6% of the weight of the paper of highly cross-linked, titanium dioxide-pigmented, polymeric vesiculated beads having a volume average particle size of at least about 5 microns up to about 35 microns. The calendered paper preferably has a basis weight of from about 20 to about 40 pounds per ream, and the vesiculated beads are preferably used in an amount of from 4% to 6%. As a feature of the invention, it is found that the carboxyl-functional cross-linked beads used herein when used in aqueous suspension thickened with a neutralized polycarboxylic acid polymer thickener, enhance the retention of fines in the papermaking process when used in conjunction with anionic retention aids, especially carboxyl-functional acrylamide copolymers, and particularly when used in an aqueous furnish having a pH of from 4 to 6.

533890

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