Method of forming an absorbent structure

Patent metadata

Field	Value
Publication number	US-9808381-B2
Application number	US-201715399100-A
Country	US
Kind code	B2
Filing date	Jan 5, 2017
Priority date	Sep 30, 2013
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

A liquid absorbent structure is made by dry laying a fibrous web having incorporated therein a superabsorbent material, and applying an aqueous composite stabilizer to at least one surface of the web. The aqueous composite stabilizer imparts integrity to the resulting structure without substantially impairing the effectiveness of the superabsorbent material to absorb liquid while forming the absorbent structure without removing the water from aqueous composite stabilizer or drying out the absorbent structure. The absorbent composite absorbs the water from the aqueous composite stabilizer. The absorbent composite comprises about 70% by weight of a superabsorbent material.

First claim

We claim:

1. An absorbent article comprising:
a. a topsheet,
b. a backsheet, and
c. an absorbent core manufactured by providing an absorbent structure forming surface; forming an absorbent composite on the absorbent structure forming surface, wherein the absorbent composite comprises about 70% by weight of a superabsorbent material; applying an aqueous composite stabilizer to the absorbent composite on at least a first side to form an absorbent structure; wherein the aqueous composite stabilizer comprises a stabilizing component, the stabilizing component is applied to the absorbent composite at an add-on rate of between about 1% and about 4% by weight of the absorbent structure and wherein the absorbent composite absorbs the water from the aqueous composite stabilizer.

2. The article of claim 1 wherein the stabilizing component is applied at an add-on rate of between about 1.5% and about 2.5% by weight of the absorbent structure.

3. The article of claim 1 wherein the aqueous composite stabilizer comprises from about 7.5% to about 55% by weight solids.

4. The article of claim 1 wherein the aqueous composite stabilizer comprise from about 11.5% to about 15.5% by weight solids.

5. The article of claim 1 wherein the absorbent composite has a basis weight of between 200 and 1000 grams per square meter.

6. The article of claim 1 wherein the absorbent forming surface is a fluid acquisition layer selected from metlblown-spunbond-meltblown, spunbond fabric, meltblown fabric, coform fabric, carded web, bonded-carded web, bicomponent spunbond fabric, spunlace, tissue, and combinations thereof.

7. The article of claim 1 further comprising forming the absorbent core without curing the absorbent structure.

Assignees

• Kimberly Clark Co

Inventors

• Fell David Arthur
• Hurley Steven Michael
• Smith Donald Leroy
• Williams Kendell Jean
• Kraft Nicholas Alan
• Buss Johanna Marie
• Paulson David John
• Vercauteren Thomas Gerard
• Rosack Sara Lynn
• Van Himbergen James George

Classifications

• B32B27/065

  of foam · CPC title

• A61F2013/530489

  being randomly mixed in with other material · CPC title

• A61F13/00991

  for treating webs, e.g. for moisturising, coating, impregnating or applying powder · CPC title

• A61F13/531 Primary

  having a homogeneous composition through the thickness of the pad (A61F13/538, A61F13/539 take precedence) · CPC title

• A61F13/15626 Primary

  Making fibrous pads without outer layers · CPC title