Absorbent paper comprising polymer-modified fibrous pulps and we

Details Absorbent paper comprising polymer-modified fibrous pulps and we Absorbent paper comprising polymer-modified fibrous pulps and we

1989-07-11

1991-01-22

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-uniform, irregular or configured web or sheet

162111, 162112, 162113, 162123, 162146, 1621683, 162182, 162183, 162184, D21H 1302

Patent

active

049868829

ABSTRACT:
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.

REFERENCES:
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patent: 4354901 (1982-10-01), Kopolow
patent: 4552618 (1985-11-01), Kopolow
patent: 4689045 (1987-08-01), Armagnacq et al.

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