Disposable diaper

• US 20050154363A1
• Filed: 03/10/2005
• Published: 07/14/2005
• Est. Priority Date: 04/12/1999
• Status: Abandoned Application

• Current Assignee: KAO Corporation
• Original Assignee: KAO Corporation
• Inventors: Masuki, Tetsuya, Suzuki, Mikio, Ishiguro, Kenji, Minato, Masanori, Yanagihara, Shigeto
• Application Number:
  US11/075,920
• Publication Number:
  US 20050154363A1
• Time in Patent Office: Days
• US Class Current: 604/367
• CPC Class Codes: A61F 13/15203 Properties of the article, e.g. stiffness or absorbency chemical aspects A61L15/00
• CPC Class Codes: A61F 13/531 having a homogeneous composition through the thickness of the pad A61F13/538, A61F13/539 take precedence
• CPC Class Codes: A61F 2013/530708 characterized by the absorbency properties
• CPC Class Codes: A61F 2013/530715 by the acquisition rate
• CPC Class Codes: A61F 2013/530722 by the delayed absorbency

Abstract

A disposable diaper is provided comprising a liquid permeable topsheet, a liquid impermeable backsheet, and a liquid retentive absorbent member interposed between the topsheet and the backsheet. The absorbent member comprises, in admixture, a superabsorbent polymer A having a rate of absorption of 8 g/30 sec/0.3 g or more measured by DW method and a superabsorbent polymer B having a rate of absorption of 5 g/30 sec/0.3 g or less measured by DW method at a polymer A/polymer B weight ratio of 90/10 to 10/90. The admixture optionally further comprises fluff pulp in an amount of from 0 to 30% by weight.

Claims

1. An absorbent article comprising a liquid permeable topsheet, a liquid impermeable backsheet, and a liquid retentive absorbent member interposed between said topsheet and said backsheet, wherein said absorbent member has a fluff pulp content of 0 to 30% by weight, and the ratio of the thickness of an unloaded absorbent article is at least 1.3 times the thickness of said absorbent article under a load of 180 gf/cm².

2. An absorbent article according to claim 1, wherein said absorbent member comprises a superabsorbent polymer A having a rate of absorption of 8 g/30sec/0.3 g or more measured by Demand Wettability DW method.

3. An absorbent article according to claim 1, wherein said absorbent member comprises a superabsorbent polymer B having a rate of absorption of 0.5 g/30sec/0.3 g to 5 g/30sec/0.3 g measured by DW method.

4. An absorbent article according to claim 1, wherein said absorbent article contains superabsorbent polymers in an amount of 60 to 95% by weight based on the weight of said absorbent member.

5. An absorbent article according to claim 4, wherein said absorbent member contains superabsorbent polymers A and B having different rates of absorption.

6. An absorbent article according to claim 5, wherein the total content of the superabsorbent polymer A and the superabsorbent polymer B in said absorbent member is 60 to 95% by weight based on the weight of said absorbent member.

7. An absorbent article according to claim 5, wherein said superabsorbent polymers A and B are present in said absorbent member in a weight ratio of polymer A/polymer B of 90/10 to 10/90.

8. An absorbent article according to claim 1, wherein said absorbent member comprises at least one superabsorbent polymer in an amount of 50% by weight or more.

9. An absorbent article according to claim 8, wherein said absorbent member comprises at least one superabsorbent polymer in an amount of from 50 to 99% by weight.

10. An absorbent article according to claim 1, wherein said absorbent member has a fluff content of 20% by weight or less.

11. An absorbent article according to claim 1, wherein said article is selected from the group consisting of disposable diapers, sanitary napkins, incontinence pads, and panty liners.