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:
Oct. 17, 1989
Filed:
Oct. 06, 1988
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A method for preparing a magnetic recording medium comprising the steps of: dispersing ferromagnetic particles in a binder solution; coating the resulting magnetic coating composition on a nonmagnetic support to provide a magnetic layer; drying the magnetic layer; and providing a calendering treatment with the magnetic layer, wherein the binder solution comprises at least one compound selected from the group consisting of a polyurethane resin having a tan .delta. peak temperature of 30.degree. C. or higher as a result of measuring dynamic viscoelasticity, a cellulose acetate butyrate, a cellulose acetate propionate, and a butyral resin; and when the magnetic layer is dried until the solvent content of the magnetic layer is in the range of from 0.1 to 3 wt %, the calendering treatment is provided with the magnetic layer.