| 摘要 |
PURPOSE:To reduce tracking noise by using a composition into which specific three kinds of org. compounds and a photopolymerizing agent are compounded. CONSTITUTION:The base layer of a recording film is produced by hardening a UV-curing resin which comprises three kinds of org. compds. and a photopolymerizing agent. These org. compds. are: an org. compd. having an acryl group or methacryl group at the end of its molecule and a polybutadiene structure of poly-1-butene structure in its molecule, an org. compd. having one acryl group or methacryl group per one molecule and no polar group such as hydroxyl group, carboxyl group, thiol or amine, and an org. compd. having two or more acryl groups or methacryl groups per one molecule and no polar group such as hydroxyl group, carboxyl group, thiol or amine. Since the cured base layer of the recording film has low water absorptivity as low as 0.3%, blisters of the base layer due to moisture absorption can be suppressed. Thus, the medium has low tracking noise. |
