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:
Jan. 31, 1995
Filed:
Apr. 28, 1993
Yuzo Otani, Tokyo, JP;
Naohiro Takeda, Yokohama, JP;
Diafoil Company, Limited, Tokyo, JP;
Abstract
There is disclosed an electrically conductive polyester film comprising a polyester base film and a coating layer which is formed by applying a coating liquid to said base film, thereafter stretching the coated film and heat-setting the film, wherein said coating liquid is an aqueous composition and contains carbon black in an amount of 30-60% by weight of the solid content and produces a layer when dried at 80.degree. C. for 10 minutes, the rupture elongation of said layer being at least 300% and is heat-settable at 10.degree.-200.degree. C., and said coating layer having a surface resistivity of 10.sup.4 -10.sup.10 .OMEGA./.quadrature. and a surface roughness of not more than 0.05 .mu.m. This polyester film exhibits good electric resistivity and light-shielding proper.