US 6,689,934 B2 · Absorbent materials having improved fluid intake and lock-up properties

Abstract

Disclosed are absorbent composites, useful in an absorbent article, having high liquid intake rates. The absorbent composites may also have a rapid liquid lock-up. Absorbent composites of this invention have an intake rate of at least about 1.9 cc liquid/second at an 80% absorbent composite saturation level and a liquid lock-up fraction of at least about 0.70 at 50% superabsorbent material saturation. The absorbent composites of this invention can be a freeze-dried composite, an airformed absorbent composite, or other fibrous or non-fibrous absorbent composites.

Claims24

Dependent claims

An absorbent article comprising

a liquid-permeable body-side liner;
an absorbent composite;
and
a substantially liquid-impermeable outer cover adjacent to the absorbent composite material;
wherein the absorbent composite has an intake rate of at least about 1.9 cubic centimeters of 0.9% by weight sodium chloride aqueous solution per second at 80% absorbent composite saturation and a liquid lock-up fraction of at least about 0.70 at 50% superabsorbent saturation determined using 0.9% by weight sodium chloride aqueous solution, the intake rate and the liquid lock-up fraction being determined by the methods set forth herein.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/291,239Filed 8 Nov 2002 · continuation in part

Priority

14 Dec 2001

Published

US 2003/0130640 A110 Jul 2003

Granted

10 Feb 2004

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

A61L 15/60
Use of materials characterised by their function or physical properties: liquid-swellable gel-forming materials, e.g. super-absorbents
Y10T 442/2484
Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with…
Y10T 442/659
Nonwoven fabric [i.e., nonwoven strand or fiber material]: including an additional nonwoven fabric
Y10T 442/692
Autogenously bonded nonwoven fabric: containing at least two chemically different strand or fiber materials

Absorbent materials having improved fluid intake and lock-up properties

Life of this patent

Absorbent materials having improved fluid intake and lock-up properties

Life of this patent

Abstract

Claims24