Paper making retention system of bentonite and a cationic galactomannan
AssigneeRhodia Chimie
InventorHerbert Hruschka
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Abstract
The invention concerns a novel method for making paper based on sheet cellulose fibre, wherein a novel retention system comprising a suspension of bentonite and a cationic galactomannan is used to improve in particular the retention of the incorporated mineral fillers. The invention also concerns a method for making paper using a retention system which substantially improves draining.
Claims14
A process for making a sheet of paper from a stock pulp by forming and drying an aqueous paper pulp containing cellulose pulp and mineral fillers, comprising the step of incorporating a retention system comprising (i) a cationic galactomannan containing at least two vicinal hydroxyl groups and not modified with aluminum, and (ii) a bentonite suspension into the stock pulp before formation of the sheet.
Dependencies are inferred from the claim text.