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:
Jul. 26, 2022
Filed:
May. 18, 2018
Riken Technos Corporation, Tokyo, JP;
Hideaki Yambe, Tokyo, JP;
Kohei Nakashima, Tokyo, JP;
Abstract
Embodiments provide a multilayer film in which: a first acrylic resin layer (α1), an aromatic polycarbonate resin layer (β), and a second acrylic resin layer (α2) are directly laminated in the stated order; the aromatic polycarbonate resin constituting the aromatic polycarbonate resin layer (β) is a product of ester exchange between a polycarbonic acid ester of an aromatic dihydroxy compound and a low-crystalline or amorphous aromatic polyester; and the relationships (Tβ−Tα1)≤30 and (Tβ−Tα2)≤30 (where Tα1 is the glass transition temperature of the acrylic resin constituting the first acrylic resin layer (α1), Tα2 is the glass transition temperature of the acrylic resin constituting the second acrylic resin layer (α2), Tβ is the glass transition temperature of the aromatic polycarbonate resin constituting the aromatic polycarbonate resin layer (β), and all of the temperatures are measured in degrees Celsius) are satisfied. The glass transition temperature of the aromatic polycarbonate resin should be 100-140° C.