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. 29, 2026
Filed:
Oct. 21, 2022
Maxell, Ltd., Kyoto, JP;
Satoki Taniguchi, Otokuni-gun, JP;
Atsushi Yusa, Otokuni-gun, JP;
Satoshi Yamamoto, Otokuni-gun, JP;
Toshiharu Goto, Otokuni-gun, JP;
Kei Mizutani, Otokuni-gun, JP;
MAXELL, LTD., Kyoto, JP;
Abstract
A co-extruded sheet reduces swelling and/or cracking of the surface occurring during thermal shaping such as vacuum forming and provides improved mechanical strength. A co-extruded sheet contains a polycarbonate resin, and includes a core layer formed from a foam resin and skin layers formed from a non-foaming resin. The skin layer is laminated to one major surface of the core layer, while the skin layer is laminated to the other major surface of the core layer. The co-extruded sheet has a density of 0.4 to 0.9 g/cm. The co-extruded sheet has a thickness of 1 to 5 mm and satisfies expression (1): 0.10≤(t+t)/T≤0.5. In expression (1), tindicates the thickness of the skin layer, tindicates the thickness of the second skin layer, and T indicates the thickness of the co-extruded sheet.