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:
Apr. 30, 2002
Filed:
May. 20, 1999
Teijin Limited, Osaka, JP;
Abstract
A composite polyester film comprising (1) a base film C of an aromatic polyester which does not contain or contains inert particles having an average particle diameter of 5 to 2,000 nm in an amount of 0.001 to 5.0 wt % based on the aromatic polyester; (2) a coating layer A on one side of the base film C, which comprises a binder resin, inert particles, a surfactant and a siloxane copolymeried acrylic resin, the outer surface of the coating layer A being not a surface for forming a magnetic layer thereon, and the siloxane copolymerized acrylic resin being contained in an amount of 1 to 50 wt % based on the coating layer A; and, (3) a coating layer B on the other side where the coating layer A is not existent of the base file C, which comprises one member selected from the group consisting of a siloxane copolymerized polyester resin, siloxane copolymerized acrylic resin, silicone and wax, a binder resin, inert particles and a surfactant, the outer surface of the coating layer B being a surface for forming a magnetic layer thereon, and the above member being contained in an amount of 5 to 90 wt % based on the coating layer B when the member is a siloxane copolymerized polyester resin or 1 to 50 wt % based on the coating layer B when the member is other than the siloxane copolymerized polyester resin.