Paper Diaper

• US 20080262459A1
• Filed: 06/29/2005
• Published: 10/23/2008
• Est. Priority Date: 06/30/2004
• Status: Abandoned Application

• Current Assignee: DAIO Paper Corporation
• Original Assignee: DAIO Paper Corporation
• Inventors: Hanao, Hiroyuki, Matsui, Tomotsugu, Kubo, Taira, Kamoto, Tomoka
• Application Number:
  US11/630,912
• Publication Number:
  US 20080262459A1
• Time in Patent Office: Days
• US Class Current: 604/375
• CPC Class Codes: A61F 13/534 having an inhomogeneous composition through the thickness of the pad A61F13/538, A61F13/539 take precedence; homogeneous cores with tissue wrapping A61F13/53
• CPC Class Codes: A61F 2013/4958 with a faecal management layer

Abstract

[Problem to be Solved] To prevent shingly hand feeling and unintentional bias of absorption characteristics in the case of using tow (fiber bundle).

[SOLUTION] An absorption element having a super absorbent polymer 54, comprising a fiber aggregate formed by opening tow 21, a super absorbent polymer 54 and a wrapping sheet 58 for wrapping them, wherein the whole face or almost whole face of part provided at least with the super absorbent polymer 54 in the sheet 58 is applied with an adhesive in a continuous plane, which is bonded to the sheet 58 with the adhesive.

Claims

1. :

A disposable diapers comprising a body fluid permeable top sheet having a hole capable of passing loose stool, a body fluid impermeable sheet, an absorber provided between the body fluid permeable top sheet and the body fluid impermeable sheet, and an external sheet of non-woven fabric provided on a back surface side of the body fluid impermeable sheet;

wherein

the absorber is composed of a lower layer absorber and an upper layer absorber provided on the lower layer absorber;

the upper layer absorber includes a fiber aggregate formed by opening a tow; and

the fiber aggregate formed by opening the tow of the upper layer absorber is composed of a crimped fiber having a fineness of 1 to 16 deniers, and a fiber density of the aggregate is 0.0040 to 0.0070 g/cm³ when a thickness is set to 10 mm.

2. :

The disposable diaper according to claim 1, wherein the upper layer absorber has a passage hole for loose stool.

3. :

The disposable diaper according to claim 1, wherein the hole of the body fluid permeable top sheet is provided in a ratio of 5 to 20 in the number/cm², and a diameter of a hole M is 0.5 to 30 mm.

4. :

The disposable diaper of claim 1 according to claim 2, wherein the number of passage holes of the upper layer absorber is 1 to 20 per one absorber, and a diameter of one passage hole is 3 to 50 mm.

5. :

The disposable diaper according to claim 1, wherein

the lower layer absorber includes a fiber aggregate formed by opening a tow and containing a super absorbent polymer particle;

the fiber aggregate formed by opening the tow of the lower layer absorber is composed of a crimped fiber having a fineness of 1 to 16 deniers, and a fiber density of the aggregate is 0.0040 to 0.0070 g/cm³ when a thickness is set to 10 mm;

the super absorbent polymer particle has a particle diameter of 20 to 850 μ

m; and

a holding sheet of non-woven fabric having a rough upper surface is provided on the back surface side of the lower layer absorber.

6. :

The disposable diaper according to claim 5, wherein a basis weight of the super absorbent polymer particle in the absorber is 400 g/m² or less, and a weight ratio of the super absorbent polymer particle to a filament in a plane area of 5 cm×

5 cm in a region directly receiving body fluid in the absorber is 1 to 14.

7. :

The disposable diaper according to claim 5, wherein a wrapping sheet for wrapping at least a back surface and a side surface of the absorber is included; and

the holding sheet is provided between the absorber and a back surface side region of the wrapping sheet.

8. :

The disposable diaper according to claim 5, wherein a continuous direction of fibers of the fiber aggregate is along a longitudinal direction or a width direction of the disposable diaper.