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AssigneesVictor Company of Japan, Ltd., Tokuyama Sekisui Industry Corporation, Limited
InventorsToshiaki Hamaguchi, Kazuhira Namikawa, Toshio Akai, Mutsuaki Nakamura, Akio Kuroda, Akio Hata, Noriki Fujii
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An information signal record medium of an electrostatic capacitance type in which a signal information is recorded as geometric variations is described. The medium is made of a conductive resin composition which comprises a vinyl chloride resin and 5 to 30 parts by weight of conductive particles based on 100 parts by weight of the vinyl chloride resin. The vinyl chloride resin is obtained by polymerizing at least one monomer for the vinyl chloride resin in which from 0.2 to 1 parts by weight of a lubricant per 100 parts by weight of the vinyl chloride resin is dissolved.
An information signal record medium of an electrostatic capacitance type in which signal information is recorded as geometric variations, the medium consisting essentially of a conductive resin composition which comprises a vinyl chloride resin, from 5 to 30 parts by weight of conductive carbon black particles based on 100 parts by weight of the vinyl chloride resin, and an organic tin stabilizer for the conductive resin composition, said vinyl chloride resin being obtained by polymerizing at least one monomer for the vinyl chloride resin, in which monomer from 0.2 to 1 part by weight of a dimethylpolysiloxane lubricant per 100 parts by weight of the vinyl chloride resin is dissolved.
Dependencies are inferred from the claim text.