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. 02, 2017
Filed:
Aug. 30, 2010
Shiro Hamamoto, Tsuruga, JP;
Yoshitomo Ikehata, Tsuruga, JP;
Katsuya Ito, Tsuruga, JP;
Jun Inagaki, Tsuruga, JP;
Shiro Hamamoto, Tsuruga, JP;
Yoshitomo Ikehata, Tsuruga, JP;
Katsuya Ito, Tsuruga, JP;
Jun Inagaki, Tsuruga, JP;
Toyo Boseki Kabushiki Kaisha, Osaka, JP;
Abstract
The invention provides a polyester film for the protection of a back surface of a solar cell which, when applied to a silicon thin film solar cell, exhibits excellent durability even under high-temperature and high-humidity conditions and long term thermal stability. The polyester film (a) contains a polyester, as a main constituent, obtained by polymerization using a polycondensation catalyst containing aluminum and/or its compound as well as a phosphorus compound having an aromatic group in the molecule; (b) has a whiteness degree of 50 or higher; (c) contains 3 to 50% by mass of fine particles with a mean particle diameter of 0.1 to 3 μm; and (d) has an acid value from not lower than 1 (eq/ton) and not higher than 30 (eq/ton).