Absorbent composite including swellable absorbent fibers

Patent metadata

Field	Value
Publication number	US-10813798-B2
Application number	US-201615742307-A
Country	US
Kind code	B2
Filing date	Jun 2, 2016
Priority date	Jul 29, 2015
Publication date	Oct 27, 2020
Grant date	Oct 27, 2020

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 swellable 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 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 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 swellable 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 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 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 66% 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 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 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

• B01J20/28004

  Sorbent size or size distribution, e.g. particle size · CPC title

• A61L15/60 Primary

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

• A61F2013/15463

  Absorbency · CPC title

• A61F13/53 Primary

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