Toyo Ink Manufacturing Company

Masami Kuwahara

Yoshio Hara

Michio Yabuno

Toru Kurihashi

Masayoshi Matsumoto

Michio Takayama

Takeshi Hirose

Takashi Kamikubo

Tadashi Itabashi

A process of accelerating electrons with a voltage applied thereto in a vacuum, guiding the accelerated electrons into a normal-pressure atmosphere, and irradiating the electron beam (EB) onto an object. The electron beam irradiation process uses a vacuum tube-type electron beam irradiation apparatus, and with the acceleration voltage for generating an electron beam set at a value smaller than 100 kV, the electron beam is irradiated onto the object.

Electron beam irradiation process and an object irradiated with an electron beam

Electron beam irradiating method and object to be irradiated with electron beam

A magnetic recording medium comprising a magnetic layer, a backing layer, and a support sandwiched between the magnetic layer and the backing layer. The backing layer is made form a coating composition comprising a filler, binder, and a silicone compound represented by the following formula (I): ##STR1## wherein groups A, B, and D each independently represent --CH.sub.3 or a group -X-Y-Z, in which X represents a C1-C11 alkylene or --(CH.sub.2).sub.3 NHCO--, Y represents a specific aliphatic group, alicyclic group, or an aromatic group, and Z represents --OH, m is an integer from 4 to about 150, and n is an integer from 1 to 6, the compound of formula (I) containing at least one -X-Y-Z group, with the ratio of the number of groups -X-Y-Z to m being from 1:3 to 1:about 30.

Paint used in forming a magnetic recording medium backcoat layer

Coating composition

A magnetic recording medium comprising a magnetic layer, a backing layer, and a support sandwiched between the magnetic layer and the backing layer. The backing layer is made form a coating composition comprising a filler, binder, and a silicone compound represented by the following formula (I): ##STR1## wherein groups A, B, and D each independently represent --CH.sub.3 or a group --X--Y--Z, in which X represents a C1-C11 alkylene or --(CH.sub.2).sub.3 NHCO--, Y represents a specific aliphatic group, alicyclic group, or an aromatic group, and Z represents --OH, m is an integer from 4 to about 150, and n is an integer from 1 to 6,

Magnetic recording medium having a backcoat layer containing carbon

A magnetic recording medium comprising a magnetic layer and a backing layer respectively on surfaces of a non-magnetic support which are opposite to each other, and a coating material for forming the backing layer. The backing layer is formed from the coating material containing a fatty acid salt having 5 to 11 carbon atoms with therefor a transition metal, a dispersant, a binder, and a filler. The backing layer provides improved properties, such as increased durability, smoothness of surface, electric conductivity, and light shielding.

Magnetic recording medium having a backcoat layer containing a

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Tokyo, Japan

Masami Kuwahara