Process for the production of paper

Details Process for the production of paper Process for the production of paper

2000-10-18

2008-10-28

Fortuna, José A (Department: 1791)

Paper making and fiber liberation

Processes and products

Non-fiber additive

C162S168200, C162S168300, C162S181600, C162S189000

Reexamination Certificate

active

07442280

ABSTRACT:
A process for the production of paper from a suspension containing cellulosic fibers, and optional fillers, which comprises adding to the suspension a drainage and retention aid comprising a cationic organic polymer, forming and dewatering the suspension on a wire, wherein the cationic organic polymer has an aromatic group and the suspension which is dewatered on the wire has a conductivity of at least 2.0 mS/cm. The invention further relates to a process for the production of paper from a suspension containing cellulosic fibers, and optional fillers, comprising adding to the suspension a drainage and retention aid comprising a cationic organic polymer having an aromatic group, forming and dewatering the suspension on a wire to obtain a wet web of paper and white water, recirculating the white water and optionally introducing fresh water to form a suspension containing cellulosic fibers, and optional fillers, to be dewatered, wherein the amount of fresh water introduced is less than 30 tons per ton of dry paper produced.

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