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. 28, 2017
Filed:
Jul. 15, 2013
Toray Films Europe, Saint-Maurice-de-Beynost, FR;
Valerie Lacrampe, Saint-Maurice-de-Beynost, FR;
Karine Billard, Saint-Maurice-de-Beynost, FR;
Timothy Stevenson, Saint-Maurice-de-Beynost, FR;
Naoki Kawaji, Saint-Maurice-de-Beynost, FR;
Hideki Fujii, Saint-Maurice-de-Beynost, FR;
Julien Faldysta, Saint-Maurice-de-Beynost, FR;
TORAY FILMS EUROPE, Saint-Maurice-de-Beynost, FR;
Abstract
The invention concerns a multilayer biaxially oriented white polyester film (adhesion, absence of chalking, opacity whiteness, reflectance, hydrolysis resistance & light stability) comprising three polyester layers: a core layer and two outer layers and contains TiOparticles. In this film: at least one layer comprises a PET whose: number average molecular weight is within [18500-40000]; intrinsic viscosity IV is ≧0.70 dL/g; and carboxyl group content is ≦30 eq/T. Additionally, the core layer comprises TiOparticles in a range of [0.1-40]% w/w; the intrinsic viscosity IV is between [0.5-0.85] dL/g; a small endothermic peak temperature is between 180-230° C.; and at least one light stabilizer is added in at least one of the outer layers, in a total concentration between [0.1-35]% w/w. The invention also includes the method for manufacturing such film and the laminate which is part of the back sheet of a solar cell.