REWRITABLE RECORDING MEDIUM AND ITS RECORDING METHOD

Japanese Patent JP2993203

B2

PURPOSE: To provide a recording medium wherein a recording operation and an erasing operation can be performed reversibly by means of light or heat by a recording layer wherein the following are contained: coloring particles whose surface is provided with a crystal nucleus formation ability as crystalline organic molecules; crystalline organic molecules; and a transparent matrix polymer.
CONSTITUTION: A polyester sheet provided with an aluminum vapor-deposited reflection layer 2 is used as a substarte 1. The reflection layer 2 is coated to a thickness of 13μm, with a liquid in which the following are dispersed and dissolved in tetrahydrofuran: hydroxystearic acid as crystalline organic molcules; a phenol-based antioxidant as an additive; a vinyl chloride-vinyl acetate copolyer as a transparent matrix polmer; and red glass beads in an average of 15μm as coloring particles 4. Thereby, a recording layer 3 is formed. In addition, a UV-curing acryl resin is coated as a surface protective layer 6. The title recording medium becomes transparent at about 70 to 90°C, and its recording operation can be performed at 100°C by using a semiconductor laser. The recording durability of the recording medium amounts to about 600 times.

KISHIMOTO YOSHIO
SUZUKI MASAAKI

JP21953791A

December 20, 1999

August 30, 1991

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MATSUSHITA DENKI SANGYO KK

B41M5/26; G11B7/00; G11B7/0045; G11B7/0055; G11B7/24035; G11B7/244; G11B7/30; (IPC1-7): G11B7/24; G11B7/24; B41M5/26; G11B7/00

JP3168944A
JP3197086A
JP1281994A

Fumio Iwahashi (2 others)

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