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:
Jul. 08, 1997
Filed:
Sep. 12, 1995
Applicant:
Inventors:
Assignee:
Toray Industries, Inc., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428141 ; 4284744 ; 4286 / ; 4286 / ; 428900 ;
Abstract
The present invention provides a magnetic recording medium including a base film having an aromatic polyamide and a magnetic layer formed on at least one surface of the base film, such that the base film has a tensile Young's modulus in at least one direction of not less than 700 kg/mm.sup.2, a content of materials extractable with methylene chloride of not more than 0.5%, and a dimensional change in the longitudinal direction after applying a load of 1 kg per 1 mm.sup.2 at 100.degree. C. for 10 minutes of not more than 2%. The magnetic recording medium is excellent in running property and durability even under severe conditions.