Sheet-like superabsorbent structures

US6051317A · kind A · utility

Assignee

• Stockhausen GmbH & Co. KG · DE

Inventors

• Helmut Brueggemann · Duisburg, DE
• Kurt Dahmen · Rheydt, DE
• Dieter Lehwald · Kürten, DE
• Roland Theilmann · Krefeld, DE

Key dates

• Filing date: Aug 20, 1997
• Grant date: Apr 18, 2000
• Expiry date: Aug 20, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T442/2885
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

The invention relates to sheet-like absorbents for water and aqueous solutions, containing at a defined distribution PA1 A) at least one water-swellable synthetic and/or natural superabsorbent polymer, and PA1 B) at least one water-soluble synthetic and/or natural polymer as a matrix of sheet-like design wherein the superabsorbent component A) is integrated or fixed. The sheet-like absorbents have an increased absorptive capacity for water and aqueous liquids, particularly under load. They are manufactured by forming a sheet-like matrix from the water-soluble synthetic and/or natural polymers B) and providing same with said water-swellable synthetic and/or natural superabsorber A), e.g., by applying a solution of matrix B) on a surface, sprinkling same with component A), and drying the sheet-like structure thus obtained. Such sheet-like absorbents are used in hygienic articles, as components in natural or artificial soils, as insulating material for pipes and lines, primarily cables and building constructions, as liquid-absorbing and liquid-storing component in packaging materials, as a part in articles of clothing, and as a depot for the controlled release of an active substance.