Process for making paper
AssigneeCooperatieve Verkoop-en Productievereniging van Aardappelmeel en Derivaten AVEBE B.A.
InventorsJacob Terpstra, Jan Hendriks
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Abstract
The invention relates to a process for making paper wherein an anionic starch, which is based on a starch comprising at least 95 wt. %, based on dry substance of the starch, of amylopectin, or a derivative of said starch, is used in combination with a fixative as a strengthening agent.
Claims9
A process for making paper wherein an anionic starch, which is based on a starch comprising at least 95 wt. %, based on dry substance of the starch, of amylopectin, or a derivative of said starch, is used in combination with a fixative as a strengthening agent.
A process according to any one of the preceding claims, wherein the fixative is a cationic compound having a charge density of at least 1 μeq/mg.
A process according to any one of the preceding claims, wherein the fixative is chosen from the group of polyaluminum compounds, alum, cationic starch or a derivative thereof, polydimethyldiallylammonium chlorides, polyamines, polyvinylamines, polyethylene imines, and dicyandiamide polycondensates.
Paper obtainable by a process according to any one of the preceding claims.
The use of an anionic starch, which is based on a starch comprising at least 95 wt. %, based on dry substance of the starch, of amylopectin, or a derivative of said starch, as a strengthening agent in paper.
The use of an anionic starch, which is based on a starch comprising at least 95 wt. %, based on dry substance of the starch, of amylopectin, or a derivative of said starch, for reducing the amount of a fixative in a process for making paper wherein an anionic starch is used as a strengthening agent.
Dependencies are inferred from the claim text.