| 摘要 |
PROBLEM TO BE SOLVED: To provide an original film for high-definition laser engraving type flexographic printing plate which can make microprojecting engraving properties compatible with printing characteristics.SOLUTION: The original film for laser engraving type flexographic printing plate has a crosslinked relief forming layer, obtained by crosslinking a resin composition containing a chain polymerizable monomer (A), a crosslinking agent (B) which makes a crosslinking through successive reaction and a crosslinkable polymer (C) with a crosslinkable group which makes a chemical reaction with the crosslinking agent (B), under chain polymerization and successive crosslinking reaction, formed on a support. In the crosslinked relief forming layer, the storage modulus of E'(MPa), when the frequency is 100 Hz at 25°C, can meet the relationship of (a): 1≤E'≤30, and the maximum degree of elongation L(%) at the time of tensile break at 25°C can meet the relationship of (b): 30≤L≤300. |
