| 摘要 |
PURPOSE:To obtain a superior printing plate or the like having superior flexibility and impact resistance and causing no chipping even at low temp. and humidity by adding a polymerizing unsatd. compound and a photoreaction initiator to a polyvinyl alcohol (PVA) polymer and water soluble polyamide in a specified ratio. CONSTITUTION:To 100pts.wt. PVA polymer preferably having >=50mol% saponification degree and >=50 polymn. degree are added 0.5-100pts.wt. water-soluble polyamide preferably contg. 1-50mol% sulfonic acid or sulfonate in each molecule, an unsatd. compound having a polymerizing double bond such as bisacrylamide by 5-100wt% to the total amount of said polymers and a photopolymn. initiator such as benzophenone. The resulting composition is formed into a sheet and adhered to a support, or it is applied to a support and dried to obtain a photosensitive resin plate. Using the plate a printing plate for letterpress printing, etc. with superior flexibility, impact resistance, etc. is obtd. |
