| 摘要 |
PURPOSE:To obtain a desired thermal property and cure in a short time through irradiation with ultraviolet rays and heat treatment by making a resin constituting a holding layer a polycarbonate resin having an elastic modulus at a specific room temperature and a glass transition temperature and having a crosslinking structure. CONSTITUTION:An expansion layer (A) consisting of a resin (P1) which displays a rubber elasticity at least at a room temperature and a coloring matter (D1) and a holding layer (B) consisting of a resin (P2) which is in a state of glass at the room temperature and changes reversibly to a state of rubber at a temperature higher than the room temperature and a coloring matter (D2) are supported on a substrate. In this case, the holding layer resin P2 has a modulus of elasticity 50%/mm<2> or more and a glass transition temperature 60-150 deg.C, which is a polycarbonate resin having a crosslinking structure. The expansion layer (A) is coated with the polycarbonate under coexistence of a radical initiator and a crosslinking agent as occasion demands, thereafter, treated with irradiation of ultraviolet rays or heating. An efficient expansion with the expansion layer (A) to be occurred by heating with laser irradiation is necessary for improving the recording property. |
