Magnetic recording medium and method of fabricating it

• US 4,335,183 A
• Filed: 04/27/1981
• Issued: 06/15/1982
• Est. Priority Date: 05/12/1980
• Status: Expired due to Term

• Current Assignee: Tokyo Magnetic Printing Company Limited
• Original Assignee: Tokyo Magnetic Printing Company Limited
• Inventors: Hosaka, Hiroshi
• Primary Examiner(s): Pianalto, Bernard D.
• Application Number:
  US06/257,944
• Time in Patent Office: 414 Days
• Field of Search: 428/336, 428/537, 428/694, 428/900, 427/44, 427/54.1, 427/128, 427/130
• US Class Current: 428/844.6
• CPC Class Codes: D21H 25/06 of impregnated or coated paper D21H25/08 takes precedence
• CPC Class Codes: G11B 5/7026 Radiation curable polymers
• CPC Class Codes: G11B 5/739 Magnetic recording media substrates
• CPC Class Codes: Y10S 428/90 Magnetic feature
• CPC Class Codes: Y10T 428/31993 Of paper

Abstract

A magnetic recording medium comprises a substrate of paper sheet and a magnetic recording layer applied to the substrate, which layer contains a magnetic material and an ultraviolet- or an electron beam-curing binder resin.

Claims

1. A magnetic recording medium comprising a substrate of paper sheet and a magnetic recording layer applied to said substrate, said layer containing a magnetic material and an ultraviolet-curing binder resin.

2. A magnetic recording medium as defined in claim 1 wherein said paper sheet has a rigidity of 2 to 100 g.cm, and said layer has a thickness of 0.5 to 20μ

.

3. A magnetic recording medium comprising a substrate of paper sheet and a magnetic recording layer applied to said substrate, said layer containing a magnetic material and an electron beam curing binder resin.

4. A magnetic recording medium as defined in claim 3 wherein said paper sheet has a rigidity of 2 to 100 g.cm and said layer has a thickness of 0.5 to 20μ

.

5. A method of fabricating a magnetic recording medium comprising the steps of preparing a substrate of paper sheet, applying to said substrate a magnetic paint containing a magnetic material and an ultraviolet-curing binder resin, and irradiating said applied paint film with ultraviolet rays to cause said paint film to cure and to thereby form a magnetic film.

6. A method as defined in claim 5 wherein said paper sheet has a rigidity of 2 to 100 g.cm and said layer has a thickness of 0.5 to 20μ

.

7. A method of fabricating a magnetic recording medium comprising the steps of preparing a substrate of paper sheet, applying to said substrate a magnetic paint containing a magnetic material and an electron beam-curing binder resin, and irradiating said applied paint film with electron beam to cause said paint film to cure and to thereby form a magnetic film.

8. A method as defined in claim 7 wherein said paper sheet has a rigidity of 2 to 100 g.cm and said layer has a thickness of 0.5 to 20μ

.