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.:
Date of Patent:
Sep. 18, 2012
Filed:
Dec. 14, 2010
Eisuke Chiba, Tokyo, JP;
Tatsuya Ogawa, Tokyo, JP;
Hiroshi Koyama, Tokyo, JP;
Shinichi Koizumi, Tokyo, JP;
Eisuke Chiba, Tokyo, JP;
Tatsuya Ogawa, Tokyo, JP;
Hiroshi Koyama, Tokyo, JP;
Shinichi Koizumi, Tokyo, JP;
Kyodo Printing Co., Ltd., Tokyo, JP;
Abstract
A packaging bag and a drying agent with a moisture absorption indicator function are provided without using a heavy metal harmful to the human body. The packaging bag includes a first packaging material () and a second packaging material (). The first packaging material () is provided on an outermost side thereof with a transparent barrier film () having a barrier property against water vapor. The second packaging material () has a light-reflective or light-absorbing film () and a pattern printed layer () overlaid on a bag interior side thereof, the pattern printed layer () having a printed moisture-absorbing indicator pattern (). A desiccant-containing resin film () which becomes transparent due to moisture absorption is overlaid on a bag interior side of at least one of the first packaging material () and the second packaging material (). The drying agent with a moisture absorption indicator function includes an indicator film layer () having a barrier film (), a pattern printed layer () for a moisture absorption indicator, and a moisture-absorbing film () containing zeolite, the pattern printed layer () and moisture-absorbing film () being laminated in this order on the barrier film (). The drying agent further includes a main desiccant layer () and a moisture permeable film () that are overlaid on the moisture-absorbing film ().