Digitally imageable flexo-printing plate with integrated barrier layer

US10518571B2 · kind B2 · utility

Assignee

• Flint Group Germany GmbH · DE

Inventors

• Matthias Beyer · Weinheim, DE
• Armin Becker · Frankenthal (Pfalz), DE

Key dates

• Filing date: May 24, 2016
• Grant date: Dec 31, 2019
• Expiry date: May 24, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G03F7/36
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A digitally imageable, photopolymerizable flexographic printing element that includes, disposed one above another in order, at least a dimensionally stable support, at least one photopolymerizable, relief-forming layer having a layer thickness of 300-6000 μm, including at least one elastomeric binder, an ethylenically unsaturated monomer, and a photoinitiator or a photoinitiator system, an oxygen-blocking barrier layer which is transparent to UVA light and has a layer thickness of 0.3-5 μm, a laser-ablatable mask layer having a layer thickness of 0.3-5 μm, including at least one elastomeric binder and a material which absorbs UV/VIS light, and a removable outer film, wherein the at least one relief-forming layer, the barrier layer and the mask layer are soluble or dispersible in an organic solvent, and the barrier layer includes at least one oxygen-blocking binder and an oligomeric or polymeric basic adhesion component.