Absorbent core having a dusting layer

• US 4,888,231 A
• Filed: 06/30/1987
• Issued: 12/19/1989
• Est. Priority Date: 05/28/1986
• Status: Expired due to Term

• Current Assignee: The Procter & Gamble Company
• Original Assignee: The Procter & Gamble Company
• Inventors: Angstadt, John J.
• Primary Examiner(s): Cannon, James C.
• Application Number:
  US07/068,598
• Time in Patent Office: 903 Days
• Field of Search: 428/213, 428/283, 428/286, 428/287, 428/339, 428/913, 604/368
• US Class Current: 428/213
• CPC Class Codes: A61F 13/15626 Making fibrous pads without outer layers
• CPC Class Codes: Y10S 428/913 Material designed to be responsive to temperature, light, moisture
• CPC Class Codes: Y10T 428/237 Noninterengaged fibered material encased [e.g., mat, batt, etc.]
• CPC Class Codes: Y10T 428/239 Complete cover or casing
• CPC Class Codes: Y10T 428/2495 Thickness [relative or absolute]
• CPC Class Codes: Y10T 428/249992 Linear or thermoplastic
• CPC Class Codes: Y10T 428/249993 Hydrocarbon polymer
• CPC Class Codes: Y10T 428/269 including synthetic resin or polymer layer or component

Abstract

Airlaid fibrous webs having a primary layer having discrete particles of absorbent gelling material dispersed through at least a portion of the web airlaid over a dusting layer of essentially hydrophilic fiber material. The dusting layer acts to block the passage of particles injected in the stream of fibers forming the primary layer so as to minimize equipment plugging problems and the loss of particles or fibers through the foraminous forming element and to provide a more efficient absorbent core.

Claims

1. An absorbent article comprising:

a topsheet;

a liquid impervious backsheet associated with said topsheet; and

a dual-layer absorbent core disposed between said topsheet and said backsheet, said dual-layer absorbent core comprising;

(i) a shaped core component that quickly collects and distributes discharged body liquids, and

(ii) an insert core component that absorbs and retains discharged body fluids from said shaped core component, said shaped core component being positioned between said topsheet and said insert core component, said insert core component comprising;

(a) a dusting layer consisting of hydrophilic fiber material, and

(b) a primary layer consisting of a combination of hydrophilic fiber material and particular amounts of discrete particles of absorbent gelling material airlaid over said dusting layer,

wherein said dusting layer is relatively thinner in thickness than said primary layer, and wherein said dusting layer is disposed adjacent said backsheet.

2. The absorbent article of claim 1 wherein said primary layer comprises a uniform combination of hydrophilic fiber material and particular amounts of discrete particles of absorbent gelling material.

3. The absorbent article of claim 2 wherein said hydrophilic fiber material consists of cellulose fibers.

4. The absorbent article of claim 3 wherein said insert core component has a top surface area from about 0.25 to about 1.0 times that of said shaped core component.

5. The absorbent article of claim 4 wherein said insert core component is positioned relative to said backsheet in a manner such that at least about 75% of the absorbent gelling material in said primary layer is found within the front two-thirds section of said absorbent article.

6. The absorbent article of claim 5, wherein said primary layer contains from about 9% to about 60% by weight of said primary layer of discrete particles of absorbent gelling material.

7. The dual-layer absorbent core of claim 6 wherein said shaped core component consists essentially of hydrophilic fiber material and from about 0% to about 8% by weight of said shaped core component of discrete particles of absorbent gelling material.

8. An absorbent article comprising:

a topsheet;

a liquid impervious backsheet associated with said topsheet; and

an absorbent core disposed between said topsheet and said backsheet, said absorbent core comprising;

(a) a dusting layer consisting of hydrophilic fibrous material, and

(b) a primary layer consisting of a combination of hydrophilic fibrous material and particular amounts of discrete particles of absorbent gelling material airlaid over said dusting layer,

wherein said dusting layer is relatively thinner in thickness than said primary layer, and wherein said dusting layer is positioned adjacent said backsheet.

9. The absorbent article of claim 8 wherein said primary layer consists of a uniform combination of hydrophilic fibrous material and particular amounts of discrete particles of absorbent gelling material.

10. The absorbent article of claim 9 wherein said hydrophillic fibrous material comprises cellulose fibers.