Fluid-absorbent article

Patent metadata

Field	Value
Publication number	US-9814634-B2
Application number	US-201213649559-A
Country	US
Kind code	B2
Filing date	Oct 11, 2012
Priority date	Oct 18, 2011
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

The present invention relates to fluid-absorbent articles, comprising a fluid-absorbent core comprising at least 60% by weight of fluid-absorbent polymer particles and not more than 40% by weight of cellulose based fibers and an acquisition-distribution layer comprising at least 90% by weight of synthetic non-cellulose based fibers and not more than 10% by weight of cellulose based fibers. The thickness deviation of the bi-folded fluid-absorbent article in longitudinal direction is less than 10%. More particularly, the present invention relates to folding and packaging of disposable fluid-absorbent articles such as diapers, training pants.

First claim

The invention claimed is:

1. A bi-folded diaper comprising
a) an upper liquid-pervious layer,
b) a lower liquid-impervious layer,
c) a fluid-absorbent core between (A) and (B) comprising at least 90% by weight of fluid-absorbent polymer particles and not more than 10% by weight of cellulose based fibers, based on a sum of the fluid-absorbent polymer particles and the cellulose based fibers, and
d) an acquisition-distribution layer between (A) and (C) comprising at least 90% by weight of synthetic non-cellulose based fibers and not more than 10% by weight of cellulose based fibers, based on a sum of the synthetic non-cellulose based fibers and the cellulose based fibers,
wherein (i) the acquisition-distribution layer (D) is in longitudinal direction asymmetric positioned on the fluid-absorbent core (C) wherein a distance between the centers of the fluid-absorbent core (C) and the acquisition-distribution layer (D) is from 5 to 20% of a total length of the fluid-absorbent core in longitudinal direction, (ii) a thickness of the acquisition-distribution layer (D) is not more than 60% of a thickness of the fluid-absorbent core (C), (iii) a thickness deviation of the bifolded diaper in longitudinal direction is less than 10%, (iv) and a thickness of an unfolded diaper is less than 3 mm,
and wherein the diaper is bi-folded such that each longitudinal side is folded inward, then the diaper is folded once at the centre such that the diaper overlaps itself to form a rectangular shape.

2. The diaper according to claim 1 , wherein the acquisition-distribution layer is essentially free of cellulose based fibers.

3. The diaper according to claim 1 , wherein the fluid-absorbent core comprises less than 10% by weight of the cellulose based fibers.

4. The diaper according to claim 1 , wherein the fluid-absorbent core comprises a hotmelt adhesive.

5. The diaper according to claim 1 , herein the synthetic non-cellulose based fibers are based on polyester, polyethylene, polypropylene, polylactic acid, polyamide and/or blends thereof.

6. The diaper according to claim 1 , wherein the fluid-absorbent core is encapsulated by wrapping with a nonwoven material or a tissue paper.

7. The diaper according to claim 1 , wherein the fluid-absorbent polymer particles are placed in discrete regions of the fluid-absorbent core.

8. The diaper according to claim 1 , wherein the fluid-absorbent core comprises at least 8 g of fluid-absorbent polymer particles.

9. The diaper according to claim 1 wherein the fluid-absorbent polymer particles have a bulk density of at least 0.55 g/cm 3 .

10. The diaper according to claim 1 , wherein the fluid-absorbent polymer particles have a centrifuge retention capacity of at least 24 g/g.

11. The diaper according to claim 1 , wherein the fluid-absorbent polymer particles have absorbency under high load of at least 18 g/g.

12. The diaper according to claim 1 , wherein the fluid-absorbent polymer particles have a saline flow conductivity of at least 20×10 −7 cm 3 s/g.

13. A package comprising diapers according to claim 1 .

14. The diaper according to claim 1 wherein the thickness of the unfolded diaper is 1.6 mm to less than 3 mm.

Assignees

• Basf Se

Inventors

• Schröder Ulrich
• Funk Rüdiger
• Louden John Joseph

Classifications

• A61F2013/5307

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

• A61F13/55115

  characterized by the features before use, e.g. how are the diapers folded or arranged in a package · CPC title

• A61F13/53708 Primary

  the layer having a promotional function on liquid propagation in at least one direction · CPC title

• A61F13/55105

  packaging of diapers · CPC title

• A61F13/5323

  having absorbent material located in discrete regions, e.g. pockets · CPC title