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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11433157 B1

PDFFull Text
Date of Patent:
Sep. 06, 2022

Filed:

Jun. 19, 2019

Absorbent article

Applicant:

Unicharm Corporation, Ehime-Ken, JP;

Inventors:

Koichi Yamaki, Kanonji, JP;

Takayoshi Konishi, Kanonji, JP;

Hideaki Ichiura, Kochi, JP;

Assignee:

Unicharm Corporation, Ehime, JP;

Attorney:

Osha Bergman Watanabe & Burton LLP

Primary Examiner:

Catharine L Anderson

Assistant Examiner:

Lynne Anderson

Int. Cl.
CPC ...
A61F 13/514 (2006.01); A61L 15/62 (2006.01); A61L 15/18 (2006.01); A61F 13/15 (2006.01); A61L 15/22 (2006.01); B32B 27/18 (2006.01); C08L 101/00 (2006.01); A61F 13/53 (2006.01); B01J 20/24 (2006.01); C08K 3/00 (2018.01); A61F 13/511 (2006.01); A61F 13/534 (2006.01); A61F 13/496 (2006.01);
U.S. Cl.
CPC ...
A61L 15/18 (2013.01); A61F 13/15 (2013.01); A61F 13/15252 (2013.01); A61F 13/511 (2013.01); A61F 13/514 (2013.01); A61F 13/53 (2013.01); A61F 13/534 (2013.01); A61L 15/22 (2013.01); A61L 15/62 (2013.01); B01J 20/24 (2013.01); B32B 27/18 (2013.01); C08K 3/00 (2013.01); C08L 101/00 (2013.01); A61F 13/496 (2013.01); A61F 2013/1526 (2013.01); A61F 2013/51433 (2013.01); A61F 2013/53481 (2013.01);
Abstract

An absorbent article may include a top sheet that is liquid-permeable, a back sheet that is liquid-impermeable, and an absorbent body situated between the top sheet and the back sheet in a thickness direction. At least one of the top sheet and the back sheet may include a synthetic resin sheet that includes a synthetic resin component and an oxidative decomposer comprising a mixture of a carboxylate and a rare earth compound. The synthetic resin sheet may contain the oxidative decomposer in a mass ratio such that a decomposition rate index (D), as determined by formula (1), is 7.8 or less:  (1)where Brepresents a mass ratio (g/g) of the oxidative decomposer with respect to the synthetic resin component, and Srepresents a specific surface area (cm/g) of the synthetic resin sheet.

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