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US 5,888,697 AGranted
Flexographic printing element having a powder layer
AssigneeE. I. Du Pont de Nemours and Company
InventorRoxy Ni Fan
Life of this patent
Estimating the term…
Abstract
A photosensitive printing element having an overall layer of powder material and a process for making a flexographic printing plate from such an element are disclosed. The photosensitive element includes a support, a photopolymerizable layer, and a layer of powder material on the photopolymerizable layer. The layer of powder material can be opaque or transparent depending upon desired use.
Claims10
A flexographic printing element, comprising:
- (a) a support shaped into a hollow cylinder;
- (b) at least one seamless photopolymerizable layer on an exterior surface of the support which is capable of forming a relief upon development and which comprises an elastomeric binder, at least one monomer and an initiator, said cylindrical support and seamless photopolymerizable layer being expandable and contractible, wherein the photopolymerizable layer has an entire exterior surface opposite the support which is tacky or substantially tacky and wherein the exterior surface of the photopolymerizable layer has solid, particulate material covering at least an imageable portion of said surface to render said surface tack-free.
A flexographic printing element comprising:
- (a) a support shaped into a hollow cylinder;
- (b) at least one seamless photopolymerizable layer on an exterior surface of the support comprising an elastomeric binder, at least one monomer and an initiator, said cylindrical support and seamless photopolymerizable layer being expandable and contractible, an entire exterior surface of the photopolymerizable layer opposite the support being tacky or substantially tacky, wherein the photopolymerizable layer is capable of forming a relief;
- and
- (c) a layer of a powder on the exterior surface of the photopolymerizable layer to render the surface tack-free.
1 more element
Dependencies are inferred from the claim text.