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. 27, 2021
Filed:
Dec. 13, 2018
Teijin Film Solutions Limited, Tokyo, JP;
Naoki Iyo, Tokyo, JP;
Shinji Yano, Tokyo, JP;
TOYOBO CO., LTD., Osaka, JP;
Abstract
A biaxially drawn colored polyester film includes at least two layers: a surface layer (layer A) mainly composed of polyester having a melting point TmA of 230 to 260° C. and modified polyolefin wax, layer A having a polymer component with intrinsic viscosity of 0.46 or more, the modified polyolefin wax with an amount of 0.2 wt % or more based on the weight of the composition, coloring pigment with an amount of 10 wt % or less, and a water contact angle of less than 70° on an outer surface; and a substrate layer (layer B) mainly composed of polyester having a melting point TmB of 230 to 260° C. and 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.