Process for adding superabsorbent to a pre-formed fibrous web using two polymer precursor streams

US6918981B2 · kind B2 · utility

Assignee

• Kimberly-Clark Worldwide, Inc. · US

Inventors

• Young Chan Ko · Seoul, KR
• Stanley R. Kellenberger · Appleton, US
• David M. Jackson · Roswell, US
• Dave Allen Soerens · Neenah, US
• Jason Matthew Laumer · Appleton, US
• Sridhar Ranganathan · Suwanee, US
• Richard Harry Thiessen · Appleton, US
• Varunesh Sharma · Atlanta, US

Key dates

• Filing date: Dec 14, 2001
• Grant date: Jul 19, 2005
• Expiry date: Aug 19, 2022

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61L15/60
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A process for making an absorbent fibrous web composite including a stable, controllable dispersion of superabsorbent polymer is provided. A pre-formed web, desirably including cellulose fibers and, optionally, thermoplastic fibers is provided. First and second superabsorbent polymer precursor compositions are added to the fibrous web using separate streams. The first and second superabsorbent polymer precursor compositions combine with each other and chemically react on or in the fibrous web, to form a superabsorbent polymer which sticks to the surface of the fibrous web.