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US 7,067,232 B2Granted
Printing Plate
AssigneeAlcoa Inc.
InventorsDavid S. Bennett, Sallie L. Blake, Daniel L. Serafin, Jean Ann Skiles, Robert E. Bombalski, Clinton S. Zediak, Gary A. Nitowski, Joseph D. Guthrie
Life of this patent
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Abstract
A printing plate for computer-to plate lithography having a laser-ablatable member supported by a substrate. At least one portion of the laser-ablatable member is formed form an acrylic polymer containing laser-sensitive particles. The laser-sensitive particles absorb imaging radiation and cause the portion of the laser-ablatable member containing the laser sensitive particles and any overlying layers to be ablated.
Claims7
A printing plate comprising:
- a substrate having a principal surface;
- an intermediate layer positioned upon said principal surface, and
- a laser-ablatable member positioned upon said intermediate layer, said laser-ablatable member
- comprising a first layer of a first polymeric composition comprising (i) an acrylic polymer, said acrylic polymer comprising an organophosphorous compound or a copolymer of acrylic acid and vinyl phosphonic acid, and (ii) a plurality of laser-sensitive particles, said polymeric composition being ablatable when a laser irradiates said laser-sensitive particles.
1 more element
A printing plate comprising:
- a substrate having a principal surface;
- and
- a laser-ablatable layer positioned on said principal surface, said laser-ablatable layer comprising a first polymeric composition comprising a plurality of laser-sensitive particles, said polymeric composition being ablatable when a laser irradiates said laser-sensitive particles, and a second polymeric composition having a different affinity for printing liquid from said first polymeric composition.
Dependencies are inferred from the claim text.