Absorbent paper comprising polymer-modified fibrous pulps...

Details Absorbent paper comprising polymer-modified fibrous pulps... Absorbent paper comprising polymer-modified fibrous pulps...

D - Textiles, Paper

21

H

92/11, 92/65

D21H 11/20 (2006.01) A61L 15/28 (2006.01)

Patent

CA 2020566

Processes are described for making highly absorbent tissues and towels by wet-laying pulps comprising particular polycarboxylate polymer-modified fibrous pulps such as mildly hydrolyzed methyl acrylate-grafted softwood kraft pulps; these pulps have distinct protonated and alkali-metal-cation-exchanged states. The wet-laying processes are adapted to exploit the very different behavior of the polymer-modified fibrous pulps in function of the two states. The preferred wet-laying processes described herein are continuous processes embodying one or more on-line chemical treatment steps which chemically switch state of the polymer-modified fibrous pulp component in a wet web on the papermaking machine to improve the processing thereof by averting or minimizing tendencies to mechanically or thermally degrade.

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