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:
Sep. 22, 1998
Filed:
Mar. 17, 1997
Masanori Nishiyama, Sagamihara, JP;
Makoto Handa, Sagamihara, JP;
Toshifumi Osawa, Sagamihara, JP;
Hideaki Watanabe, Sagamihara, JP;
Teijin Limited, Osaka, JP;
Abstract
A polyester film having low electrostatic and high adhesion properties and having formed on at least one side thereof a primer layer which has a softening point of 100.degree. to 170.degree. C. and essentially consists of (1) water-dispersible polyester resin containing, as a copolymer component, a sulfonic acid metal salt group-containing compound in an amount of 0.01 mol % or more and less than 0.5 mol % of the whole dicarboxylic acid compound (component A) and (2) polyethylene oxide-monoalkyl ether or a mixture of the same and a polyethylene oxide-polypropylene oxide block copolymer (component B). This adherent polyester film has low electrostatic properties and high heat resistance and is useful as a base film for a magnetic recording medium.