PHOTOSENSITIVE FLEXOGRAPHIC PRINTING ORIGINAL PLATE

• Main Authors: SUGIURA SHO, ICHIKAWA SHIGEHIKO, ABURA TSUTOMU
• Format: Patent
• Language: English; Japanese
• Published: 07.09.2023
• Subjects: APPARATUS SPECIALLY ADAPTED THEREFOR; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY; LINING MACHINES; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING,INKING, DAMPING, OR THE LIKE; MATERIALS THEREFOR; ORIGINALS THEREFOR; PERFORMING OPERATIONS; PHOTOGRAPHY; PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES; PHYSICS; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM; PRINTING; PRINTING PLATES OR FOILS; STAMPS; TRANSPORTING; TYPEWRITERS

To provide a photosensitive flexographic printing original plate from which a flexographic printing plate that can suppress omission even at the time of long-run printing can be obtained.SOLUTION: A photosensitive flexographic printing original plate has at least a first photosensitive resin layer and a second photosensitive resin layer in this order on a support, wherein the first photosensitive resin layer contains at least (1a) polyamide having a hydrophilic structure, (1b) a compound having an ethylenically double bond, and (1c) a photopolymerization initiator, does not substantially contain inorganic fine particles, and the second photosensitive resin layer contains at least (2a) polyamide having a hydrophilic structure, (2b) a compound having an ethylenically double bond, (2c) a photopolymerization initiator and (2d) inorganic fine particles.SELECTED DRAWING: None 【課題】ロングラン印刷時にもす抜けを抑制することができるフレキソ印刷版を得ることができる感光性フレキソ印刷版原版を提供すること。【解決手段】支持体上に、少なくとも、第１の感光性樹脂層および第２の感光性樹脂層をこの順に有する感光性フレキソ印刷版原版であって、第１の感光性樹脂層が、少なくとも、（１ａ）親水性構造を有するポリアミド、（１ｂ）エチレン性二重結合を有する化合物および（１ｃ）光重合開始剤を含有し、無機微粒子を実質的に含有せず、第２の感光性樹脂層が、少なくとも（２ａ）親水性構造を有するポリアミド、（２ｂ）エチレン性二重結合を有する化合物、（２ｃ）光重合開始剤および（２ｄ）無機微粒子を含有する感光性フレキソ印刷版原版。【選択図】なし