US 7,018,508 B2 · Process for producing dried singulated crosslinked cellulose pulp fibers

Abstract

This invention provides a dried singulated crosslinked cellulose pulp fiber product as well as an apparatus and a method for forming singulated, crosslinked, and dried fibers. In accordance with the process, a feed pulp containing a crosslinker is delivered to a jet drier. The jet drier singulates and dries the feed pulp. The singulated and dried fibers are collected from the jet drier. The feed pulp may be further treated with a treatment substance. The jet drier may be maintained at negative pressure. The product fibers may have low knot count, a low fines count, as well improved kink, curl and twist. The apparatus for carrying out the process may include a pretreatment station for supplying the treatment substance, a pulp feed device designed for pulp, a pulp feed device designed for pulp and foam suspensions, and/or a fiber separation station having a vacuum conveyor.

Claims28

Dependent claims

A process for producing crosslinked, singulated pulp fibers comprising:

treating never-dried wet pulp received directly from a pulp mill with a crosslinker;
introducing said never-dried wet pulp directly from a pulp mill and air into a jet drier;
thereafter drying and crosslinking said pulp in said jet drier to form singulated pulp fibers;
and
removing said pulp from said jet drier and separating said dried pulp fibers from said air in said jet drier, thereby producing a crosslinked singulated pulp fibers having knots, fines and accepts.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/051,872Filed 16 Jan 2002 · continuation in part

Priority

30 Oct 2001

Published

US 2003/0188838 A19 Oct 2003

Granted

28 Mar 2006

Term ends

Not estimatedThe source records don’t support an estimate.

Classification19 codes

C04B 18/241
Vegetable refuse, e.g. rice husks, maize-ear refuse; Cellulosic materials, e.g. paper , cork: paper, e.g. waste paper; Paper pulp
C08J 3/12
Processes of treating or compounding macromolecular substances: powdering or granulating
D21C 9/001
After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking…:…
D21C 9/002
Modification of pulp properties: by chemical means; preparation of dewatered pulp, e.g. in sheet or bulk form, containing special additives

Process for producing dried singulated crosslinked cellulose pulp fibers

Life of this patent

Process for producing dried singulated crosslinked cellulose pulp fibers

Life of this patent

Abstract

Claims28