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. 30, 1986
Filed:
Jul. 03, 1984
Masaharu Nishimatsu, Tokyo, JP;
Toshiaki Ide, Tokyo, JP;
Yoshiaki Saito, Tokyo, JP;
Yuichi Kubota, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A magnetic recording medium which comprises a plastic base film and a magnetic layer formed on one side of the base film and composed of ferromagnetic alloy powder dispersed in a resin binder, characterized in that said ferromagnetic alloy powder has a surface area of at least 48 m.sup.2 /g as measured by BDT method, said magnetic layer has a coercive force of at least 1,000 Oe and a surface roughness of at most 0.08 .mu.m, and a thermoset backing layer having a surface roughness of from 0.05 to 0.6 .mu.m is formed on the other side of the base film, the backing layer being made of a thermosetting resin composition comprising a vinyl chloride-vinyl acetate-vinyl alcohol copolymer, a polyurethane resin and a polyisocyanate.