Absorbent composite including swellable absorbent fibers

Patent metadata

Field	Value
Publication number	US-2018193517-A1
Application number	US-201615742307-A
Country	US
Kind code	A1
Filing date	Jun 2, 2016
Priority date	Jul 29, 2015
Publication date	Jul 12, 2018
Grant date	—

Abstract

Generally, an absorbent composite comprising between about 20% and about 80% by weight of the particulate superabsorbent material and between about 20% and 80% by weight of a swellable absorbent fiber is disclosed herein. The swellable absorbent fiber is substantially water-insoluble and water-swellable and a centrifuge retention capacity of between 5 and 20 grams per gram after four hours and reaches at least 66% of centrifuge retention capacity between about 2 and about 50 seconds.

First claim

What is claimed is:

1 . An absorbent composite comprising:
a particulate superabsorbent material, wherein the absorbent composite comprises between about 20% and about 80% by weight of the particulate superabsorbent material; a swellsable absorbent fiber, wherein the absorbent composite comprises between about 20% and 80% by weight of the swellable absorbent fiber; wherein the swellable absorbent fiber is substantially water-insoluble and water-swellable; and wherein the swellable absorbent fiber exhibits a centrifuge retention capacity of between 5 and 20 grams per gram after four hours and reaches at least 66% of the centrifuge retention capacity between about 2 and about 50 seconds.

2 . The absorbent composite of claim 1 wherein the swellable absorbent fiber reaches at least 66% of the centrifuge retention capacity between about 2 and about 20 seconds.

3 . The absorbent composite of claim 1 wherein the swellable absorbent fiber has a diameter of between 10 and 50 microns

4 . The absorbent article of claim 1 wherein the absorbent core comprises at least about 45% by weight of the absorbent fibers.

5 . The absorbent article of claim 1 wherein the absorbent core comprises between 45% and 65% by weight of the absorbent fibers.

6 . The absorbent article of claim 1 wherein the absorbent core comprises at least about 35% by weight of the superabsorbent material.

7 . The absorbent article of claim 1 wherein the absorbent core comprises about 35% to about 55% by weight of the superabsorbent material.

8 . An absorbent article comprising:
a topsheet; a backsheet; and an absorbent core disposed between the topsheet and the backsheet; wherein the absorbent core includes:
a particulate superabsorbent material, wherein the absorbent composite comprises between about 20% and about 80% by weight of the particulate superabsorbent material;
a swellsable absorbent fiber, wherein the absorbent composite comprises between about 20% and 80% by weight of the swellable absorbent fiber;
wherein the swellable absorbent fiber is substantially water-insoluble and water-swellable; and
wherein the swellable absorbent fiber exhibits a centrifuge retention capacity of between 5 and 20 grams per gram after four hours and reaches at least 66% of the centrifuge retention capacity between about 2 and about 50 seconds.

9 . The absorbent article of claim 8 wherein the swellable absorbent fiber reaches at least 66% of full capacity between about 2 and about 20 seconds.

10 . The absorbent article of claim 8 wherein the swellable absorbent fiber has a diameter of between 10 and 50 microns

11 . The absorbent article of claim 8 wherein the absorbent core comprises at least about 45% by weight of the absorbent fibers.

12 . The absorbent article of claim 8 wherein the absorbent core comprises between 45% and 65% by weight of the absorbent fibers.

13 . The absorbent article of claim 8 wherein the absorbent core comprises at least about 35% by weight of the superabsorbent material.

14 . The absorbent article of claim 8 wherein the absorbent core comprises about 35% to about 55% by weight of the superabsorbent material.

15 . The absorbent article of claim 8 wherein the absorbent core further comprises fluff.

16 . The absorbent article of claim 8 wherein the article is selected from personal care absorbent articles, health/medical absorbent articles, household/industrial absorbent articles and sports/construction absorbent articles.

17 . An absorbent core comprising:
a particulate superabsorbent material, wherein the absorbent composite comprises between about 20% and about 80% by weight of the particulate superabsorbent material; a swellable absorbent fiber; wherein a total core capacity is between about 200 g and 990 g of 0.9% saline; wherein the swellable absorbent fiber is substantially water-insoluble and water-swellable; and wherein the swellable absorbent fiber exhibits a centrifuge retention capacity of between 5 and 20 grams per gram after four hours and reaches at least 60% of the centrifuge retention capacity between about 2 and about 50 seconds.

18 . The absorbent core of claim 17 wherein the swellable absorbent fiber reaches at least 66% of full capacity between about 2 and about 20 seconds.

19 . The absorbent core of claim 17 wherein the swellable absorbent fiber has a diameter of between 10 and 50 microns

20 . The absorbent core of claim 17 wherein the absorbent core comprises at least about 45% by weight of the absorbent fibers.

21 . The absorbent core of claim 17 wherein the absorbent core comprises between 45% and 65% by weight of the absorbent fibers.

22 . The absorbent core of claim 17 wherein the absorbent core comprises at least about 35% by weight of the superabsorbent material.

23 . The absorbent core of claim 17 wherein the absorbent core comprises about 35% to about 55% by weight of the superabsorbent material.

Assignees

• Kimberly Clark Co

Inventors

• Feldkamp Joseph R
• Lopez Garcia Maria Del Carmen

Classifications

• B01J20/28028

  Particles immobilised within fibres or filaments · CPC title

• A61F13/53 Primary

  characterised by the absorbing medium (A61F13/20 takes precedence) · CPC title

• A61L15/60 Primary

  Liquid-swellable gel-forming materials, e.g. super-absorbents · CPC title

• A61F2013/530226

  with polymeric fibres · CPC title

• A61F2013/5307

  characterized by the quantity or ratio of superabsorbent material · CPC title