Eastman Kodak patented a lithographic printing plate precursor with a unique aluminum-containing substrate. The substrate has inner and outer aluminum oxide layers with specific thickness and pore sizes. A hydrophilic layer with specific composition is also included. This innovation aims to improve printing plate performance. GlobalData’s report on Eastman Kodak gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Eastman Kodak, was a key innovation area identified from patents. Eastman Kodak's grant share as of April 2024 was 71%. Grant share is based on the ratio of number of grants to total number of patents.
Lithographic printing plate precursor with unique aluminum-containing substrate
A recently granted patent (Publication Number: US11964466B2) discloses a lithographic printing plate precursor designed for on-press development. The precursor includes a substrate with an aluminum-containing plate featuring an inner aluminum oxide layer with specific thickness and micropore characteristics. An outer aluminum oxide layer, hydrophilic layer, and on-press developable radiation-sensitive imageable layer are also part of the precursor. The hydrophilic layer contains hydrophilic polymers, including a copolymer with recurring units comprising an amide group and an —OM group connected to a phosphorus atom. The outer aluminum oxide layer's properties, such as micropore density, porosity, and thickness, are carefully defined to ensure optimal performance in lithographic printing applications.
Furthermore, the patent details methods for preparing the lithographic printing plate precursor, involving processes like electrochemical or mechanical graining and etching of the aluminum-containing plate, anodizing to form inner and outer aluminum oxide layers, and applying the hydrophilic layer before the radiation-sensitive imageable layer. The on-press developable radiation-sensitive layer is infrared radiation-sensitive and negative-working, containing components like free radically polymerizable components, initiator composition, radiation absorbers, and a polymeric binder. The hydrophilic copolymer in the hydrophilic layer is derived from specific monomers and present in defined amounts to ensure the desired properties of the precursor. Overall, the patent provides a comprehensive guide to the composition and preparation of a lithographic printing plate precursor optimized for efficient and high-quality printing processes.
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