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:
Mar. 17, 2015
Filed:
Jun. 02, 2010
Shigeru Aoyama, Otsu, JP;
Ayako Shimazu, Otsu, JP;
Atsushi Shiomi, Otsu, JP;
Kozo Takahashi, Otsu, JP;
Shigeru Aoyama, Otsu, JP;
Ayako Shimazu, Otsu, JP;
Atsushi Shiomi, Otsu, JP;
Kozo Takahashi, Otsu, JP;
Toray Industries, Inc., , JP;
Abstract
A polyester film includes particles and two kinds of crystalline polyester resins in which a sea-island structure is formed, wherein, if a crystallization temperature of a crystalline polyester resin A that forms a continuous phase or matrix phase in the polyester film is represented by TccA and a crystallization temperature of a crystalline polyester resin B that forms a dispersion phase or domain phase in the polyester film is represented by TccB, expression (1) below is satisfied, and a degree of flatness of the dispersion phase is 3 or more, and 70% or more of a total number of the particles present in the dispersion phase or are in contact with the dispersion phase:5° C.  Expression (1).