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:
May. 26, 2020
Filed:
Jul. 22, 2016
Teijin Film Solutions Limited, Tokyo, JP;
Takatoshi Sato, Tokyo, JP;
Shinichiro Okada, Tokyo, JP;
TEIJIN FILM SOLUTIONS LIMITED, Tokyo, JP;
Abstract
[Problem] To provide a biaxially drawn colored polyester film for laminating and forming metal sheet that: exhibits excellent formability such that even under severe processing or high-temperature heat treatments, the film is prevented from chipping or cracks during forming into a can etc.; and yields formed articles such as cans that have excellent concealability, appearance, and printability. [Solution] The invention is arrived at using a biaxially drawn colored polyester film for laminating and forming metal sheet. Said film comprising at least two layers of: a surface layer (layer A) mainly composed of a polyester having a melting point TmA of 230 to 260° C., layer A having a coloring pigment with an amount of 10 wt % or less, a polymer component with intrinsic viscosity of 0.46 or more, and a water contact angle of 70 to 120° on an outer surface; and a substrate layer (layer B) mainly composed of a polyester having a melting point TmB of 230 to 260° C. and a coloring pigment, layer B having a polymer component with intrinsic viscosity of 0.46 or more and the coloring pigment with an amount of more than 10 wt % and 50 wt % or less; wherein |TmB−TmA| is 4° C. or less.