| 摘要 |
PURPOSE:To improve weatherability without the generation of exfoliation, crazing, etc. between a protective film and polymer layer by constituting the polymer layer having the high adhesiveness to the protective layer by forming an urethane acrylic or organopolysiloxane which is a photocrosslinkable polymer having 3-7H pencil hardness. CONSTITUTION:The protective layer 3 having 500-3,000Angstrom thickness is formed by using any one among SiO2, Si3N4, Ta2O5, GeO2, ZnS, AlN, Al2O3, I.T.O., SnO2, Sb2O3 on a transparent plastic substrate and a Te recording film layer 4 or photomagnetic recording film layer is formed on the protective layer 3. The polymer layer 2 having the high adhesiveness to the protective layer 3 is interposed between the plastic substrate and said protective layer at the same instant. The essential component of the photopolymer is the urethane acrylic or organopolysiloxane and the layer of such photopolymer resin is formed to 5-100mum thickness. The hardness is adjusted by oligomer in such a manner that the layer formed in this stage has about 3-7H pencil hardness. The photopolymer is then adhered extremely well to the protective layer. |
