| 摘要 |
PURPOSE:To provide an optical card which is capable of realizing the improvement in durability and productivity without decreasing recording density by using materials having specific properties to 1st and 2nd org. resin layers to be laminated on the recording film of the optical card consisting of 5-layered constitution for which the recording film of a bubble forming type is used. CONSTITUTION:This card consists of the 5-layered constitution laminated successively with the recording film 2, the 1st org. resin layer 3, the 2nd org. resin layer 4 and an org. protective substrate 5 on a transparent org. substrate 1. Deformed build-up parts 6, i.e., bubbles, are formed in the recording film 2 and recording is executed by projecting a laser beam for recording thereto. The material for the 1st org. resin layer 3 is selected from materials having the properties within a 20-60 range of durometer hardness and the material for the 2nd org. resin layer 4 is selected from the materials having the properties within a >=0.5kg/cm range of peel strength. The provision of the optical card having the high sensitivity, excellent durability and high practicability is thus enabled. |
