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US 5,705,310 AGranted
Flexographic printing plate
AssigneeE. I. Du Pont de Nemours and Company
InventorCarol Marie Van Zoeren
Life of this patent
Estimating the term…
Abstract
This invention relates to a process for making a flexographic printing plate from a photosensitive printing element having an infrared reduction ablatable layer capable of being selectively removed by a laser beam and wherein the process includes placing a material capture sheet in proximity to a photopolymer layer.
Claims6
A material capture element for capturing debris from laser ablated areas of a photosensitive printing element, the material capture element comprising:
- (1) an infrared-sensitive transparent photopolymerizable layer disposed adjacent an infrared-sensitive transparent support, said photopolymerizable layer having at least one elastomeric binder, at least one monomer and an initiator having sensitivity to non-infrared actinic radiation;
- (2) at least one layer of infrared radiation sensitive material having at least one self-ablative binder disposed adjacent the photopolymerizable layer, said infrared radiation sensitive layer being substantially opaque to non-infrared actinic radiation;
- and
- (3) a material capture sheet disposed adjacent the infrared radiation sensitive layer, the material capture sheet comprising a material capture support selected from the group consisting of paper and polymeric film, and a layer applied to the material capture support comprising:
- (i) an adhesive which is thermally activated upon exposure to infrared laser radiation;
- and
- (ii) an infrared absorbing agent to facilitate the thermal activation of the adhesive and thereby aid in capture of the debris.
4 more elements
Dependencies are inferred from the claim text.