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:
Nov. 11, 2003
Filed:
Sep. 12, 2001
Toyo Boseki Kabushiki Kaisha, Osaka, JP;
Abstract
The present invention provides a white biaxially oriented polyester film having a two-layer structure of layer A/layer B, wherein the layer A contains a polyester having a melting point of 240° C.-260° C. and containing titanium dioxide in a proportion of 5-30 wt %, the layer B contains a polyester having a melting point of 210° C.-235° C., and the film shows a dimensional change of not more than 2%, which is obtained by thermally adhering a layer B side of the film to a metal plate to give a laminate, which is heat-treated at 210° C. for 2 minutes, and subjecting the film after the treatment to the measurement, a film-laminated metal plate using the polyester film and a metal container obtained by forming this film-laminated metal plate. The polyester film of the present invention has superior heat resistance and is capable of stably covering the surface of a metal plate even after a heat treatment during a can forming process and the like.