US 2006/0185808 A1Published application

Fixation of optical brightening agents onto papermaking fiber

OwnerXuan Nguyeninventor

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Abstract

The present invention relates to a method of increasing the brightness of pulp, pulp made from such methods and methods of using such pulp.

Claims20

Dependent claims

A method of making pulp and/or a paper substrate, comprising contacting a plurality of fibers in solution with at least one optical brightener after the last bleaching/extraction stage

Dependencies are inferred from the claim text.

Facts

Application: 11/358,543Filed 21 Feb 2006
Priority: 19 Feb 2005
Published: 24 Aug 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

D21C 9/002
Modification of pulp properties: by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives
D21C 9/10
After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking…:…
D21C 9/1036
Other features in bleaching processes: use of compounds accelerating or improving the efficiency of the processes
D21H 21/30
Characterised by function or properties in or on the paper: luminescent or fluorescent substances, e.g. for optical bleaching

Family

Application60/654,712Us provisional application · filed 19 Feb 2005
US 2006/0185808 A1This patent

From the US filing history. Foreign family members aren’t listed.

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