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US 5,262,275 AGranted
Flexographic printing element having an IR ablatable layer and process for making a flexographic printing plate
AssigneeE. I. Du Pont de Nemours and Company
InventorRoxy N. Fan
Life of this patent
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Abstract
A photosensitive printing element having an IR ablatable layer and at least one barrier layer as set forth within and a process for making a flexographic printing plate from such an element are disclosed.
Claims3
A photosensitive printing element used for preparing flexographic printing plates comprising in the order listed:
- (a) a support,
- (b) a photopolymerizable layer comprising an elastomeric binder, at least one monomer and an initiator having sensitivity to non-infrared actinic radiation, said layer being soluble, swellable or dispersible in a developer solution;
- (c) at least one barrier layer which is soluble, swellable or dispersible or liftable in the developer solution for the photopolymerizable layer and which is substantially transparent to actinic radiation;
- and
- (d) at least one layer of infrared radiation sensitive material which is substantially opaque to actinic radiation,
- wherein the infrared-sensitive material is ablatable form the surface of the barrier layer upon exposure to infrared laser radiation.
3 more elements
Dependencies are inferred from the claim text.