LASER-ENGRAVABLE FLEXOGRAPHIC PRINTING PLATE

摘要

Disclosed is a laser-engravable flexographic printing plate with which it is possible to manufacture a printing plate free of print defects and which provides excellent resolution and printability. The original printing plate is obtained by applying light to a photosensitive resin composition containing (A) at least one type of latex having a weight average gelation degree of 40% or higher, (B) a photopolymerizable compound, and (C) a photopolymerization initiator, to crosslink and harden said resin composition. In the laser-engravable flexographic printing plate, the (B) photopolymerizable compound contains a photopolymerizable oligomer and an ethyleneically unsaturated monomer in amounts of 10 to 25 wt% and 5 to 40 wt%, respectively, relative to the weight of the photosensitive resin composition, and the ethylenic monomer is composed of 75 to 5 wt% of a monofunctional monomer and 25 to 95 wt% of a trifunctional monomer.