Filler and a process for the production thereof

Details Filler and a process for the production thereof Filler and a process for the production thereof

2006-08-01

2006-08-01

Chin, Peter (Department: 1731)

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With chemical or physical modification of liberated fiber

C162S149000, C162S181100, C162S181200, C162S182000, C162S189000, C106S136100, C106S137100, C106S140100, C106S139100, C106S407000, C106S501100, C106S823000

Reexamination Certificate

active

07083703

ABSTRACT:
A filler comprising cellulose or lignocellulose fibrils on which light-scattering material particles have been deposited, and a process for the manufacture thereof. In the filler according to the invention, an alkyl derivative of cellulose, such as CMC, has been sorbed to the fibrils. Such a filler can be prepared from a source material containing cellulose or lignocellulose fibrils by first forming a fibril suspension, into which there are fed source materials forming an inorganic or organic salt that, when precipitating, forms a light-scattering pigment. The filler according to the invention has very good strength properties; in particular, good bond strength is achieved by means of it. The concentration of mineral pigment in paper can be increased and, furthermore, the grammage of paper can be lowered without the other important properties of the paper deteriorating.

REFERENCES:
patent: 5223090 (1993-06-01), Klungness et al.
patent: 5824364 (1998-10-01), Cousin et al.
patent: 5830364 (1998-11-01), Bleakley
patent: 2 240 396 (1974-03-01), None
patent: 0 791 685 (1997-08-01), None
patent: 0 930 345 (1999-07-01), None
patent: 96/36750 (1996-11-01), None
patent: 97/01670 (1997-01-01), None
patent: 99/57370 (1999-11-01), None

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