Walter Terrine Dean

US Patent:

48880930, Dec 19, 1989

Filed:

Feb 23, 1989

Appl. No.:

7/315204

Inventors:

Walter L. Dean - Memphis TN
Danny R. Moore - Germantown TN
James W. Owens - Memphis TN
Howard L. Schoggen - Memphis TN
Robert M. Bourbon - Memphis TN
Jeffrey T. Cook - Memphis TN

Assignee:

The Procter & Gamble Cellulose Company - Memphis TN

International Classification:

D21M 512
D06M 100

US Classification:

1621576

Abstract:

Individualized, crosslinked fiber, and process for making such fibers. The individualized, crosslinked fibers have between about 0. 5 mole % and about 3. 5 mole % crosslinking agent, calculated on a cellulose anhydroglucose molar basis, reacted with fibers in the form of intrafiber crosslink bonds, wherein the crosslinking agent is selected from the group consisting of C. sub. 2 -C. sub. 8 dialdehydes, C. sub. 2 -C. sub. 8 dialdehyde acid analogues having at least one aldehyde functionality, and oligomers of such C. sub. 2 -C. sub. 8 dialdehydes, and dialdehyde acid analogues. Preferably, the crosslinking agent is glutaraldehyde, and between about 0. 75 mole % and about 2. 5 mole % crosslinking agent react to form the intrafiber crosslink bonds. The individualized crosslinked fibers are useful in a variety of absorbent structure applications.

US Patent:

48224537, Apr 18, 1989

Filed:

Jun 27, 1986

Appl. No.:

6/879708

Inventors:

Walter L. Dean - Memphis TN
Danny R. Moore - Germantown TN
James W. Owens - Memphis TN
Howard L. Schoggen - Memphis TN

Assignee:

The Procter & Gamble Cellulose Company - Memphis TN

International Classification:

D21H 512

US Classification:

1621576

Abstract:

Absorbent structures containing individualized, crosslinked fibers. The individualized, crosslinked fibers preferably have between about 0. 5 mole % and about 3. 5 mole % crosslinking agent, calculated on a cellulose anhydroglucose molar basis, reacted with the fibers in the form of intrafiber crosslink bonds, wherein the crosslinking agent is selected from the group consisting of C. sub. 2 -C. sub. 8 dialdehydes, C. sub. 2 -C. sub. 8 dialdehyde acid analogues having at least one aldehyde functionality, and oligomers of such C. sub. 2 -C. sub. 8 dialdehydes and dialdehyde acid analogues. More preferably, the crosslinking agent is glutaraldehyde, and between about 0. 75 mole % and about 2. 5 mole % crosslinking agent react to form the intrafiber crosslink bonds. Also preferably, the absorbent structures have actual dry densities greater than their corresponding equilibrium wet densities, and expand upon wetting.

US Patent:

48895954, Dec 26, 1989

Filed:

Mar 1, 1989

Appl. No.:

7/317125

Inventors:

Carlisle M. Herron - Memphis TN
Walter L. Dean - Memphis TN
Danny R. Moore - Germantown TN
James W. Owens - Memphis TN
Howard L. Schoggen - Memphis TN

Assignee:

The Procter & Gamble Cellulose Company - Memphis TN

International Classification:

D21H 512
D06M 100

US Classification:

1621576

Abstract:

A process for making individualized, crosslinked fibers having low levels of residual crosslinking agent. The fibers are made by contacting the fibers with a crosslinking agent; reacting the crosslinking agent with the fibers to form intrafiber crosslink bonds in the substantial absence of interfiber bonds; and washing the fibers with an alkaline solution.

US Patent:

55497918, Aug 27, 1996

Filed:

Jun 15, 1994

Appl. No.:

8/259842

Inventors:

Carlisle M. Herron - Cincinnati OH
Walter L. Dean - Memphis TN

Assignee:

The Procter & Gamble Company - Cincinnati OH

International Classification:

D21H 1304

US Classification:

1621576

Abstract:

Disclosed are individualized, crosslinked fibers, and processes for making such fibers, and absorbent structures containing the fibers. The individualized, crosslinked fibers have a polymeric polyacrylic acid crosslinking agent reacted with the fibers in the form of intrafiber crosslink bonds. Preferably, the crosslinking agent is a copolymer of acrylic acid and maleic acid and preferably, between about 1. 0 weight % and about 10. 0 weight % of the crosslinking agent reacts with the individualized fibers to form the intrafiber crosslink bonds. The individualized, crosslinked fibers are useful in a variety of absorbent structure applications. The absorbent structures may also contain hydrogel-forming material.