| 摘要 |
PROBLEM TO BE SOLVED: To obtain a flexographic printing plate which yields good printed matter having good ink receptivity of a solid part in printing on a pour body to be printed such as corrugated cardboard or regenerated paper having a rugged surface, hardly causes deformation (cold flow) in storage and transport in the unhardened state and the surface tackiness of the resultant plate and forms a high sensitivity sharp image. SOLUTION: This flexographic printing plate is obtained, using a photosensitive elastomer composition containing (1) 50-90 wt.% thermoplastic elastomer prepared by mixing (a) 14-35 wt.% thermoplastic elastomer consisting of styrene polymer blocks and butadiene polymer blocks with (b) a thermoplastic elastomer consisting of styrene polymer blocks and isoprene polymer blocks in the weight ratio a:b of 10:1 to 1:10, (2) 5-40 wt.% liquid polybutadiene having a molecular weight of 500-5,000 and 50-70 mol% 1,2-bond ratio, (3) 1-20 wt.% ethylenically unsaturated compound and (4) 0.1-3 wt.% photopolymerization initiator. |
