magnetic recording medium

Abstract

Abstract PURPOSE:To increase traveling performance, corrosion resistance and blocking resistance respectively for a magnetic film containing a ferromagnetic metallic thin film, by forming a film containing graphite and epoxy resin containing higher fatty acid salt on the surface opposite to a magnetic layer. CONSTITUTION:A ferromagnetic metallic thin film consisting essentially of Fe, Co and Ni is formed on a polyester film by a vacuum vapor depositing process, etc. to obtain a magnetic film. A coating material obtained by dissolving 100pts. bisphenol A type epoxy resin, 100pts. graphite and 3pts. stearic acid into toluene and 1,500pts. n-butanol with addition of tetraethylene pentamine as a hardener which is dispersed with a ball mill is coated evenly on the film of the opposite face to the above-mentioned magnetic layer. Owing to this film thus formed, both water and corrosion resistances are increased. At the same time, traveling performance is increased by about 35% for a magnetic film.

Inventors

• 👤 Kunio Hibino
• 👤 邦男 日比野
• 👤 Takashi Fujita
• 👤 藤田　隆志
• 👤 Takashi Suzuki
• 👤 貴志 鈴木

Bibliographic Details