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:
Nov. 25, 2025
Filed:
Jun. 10, 2022
Mitsubishi Chemical Corporation, Tokyo, JP;
Masaya Nakai, Tokyo, JP;
Kuniyasu Kato, Tokyo, JP;
MITSUBISHI CHEMICAL CORPORATION, Tokyo, JP;
Abstract
A laminate is provided, which requires a shorter period of time for delamination thereof and hence is excellent in recoverability. The laminate includes a first outer layer, an intermediate layer, and a second outer layer which are disposed in this order. The intermediate layer contains a polyvinyl alcohol resin. A difference in water vapor transmission rate between the first outer layer and the second outer layer is not less than 100 cc·30 μm/m·day, and the water vapor transmission rate of the first outer layer and the water vapor transmission rate of the second outer layer satisfy the following expression (1):WVTR1<WVTR2 (1)wherein WVTR1 is the water vapor transmission rate of the first outer layer and WVTR2 is the water vapor transmission rate of the second outer layer.