Process of making lithographic sheet material for laser imaging

Details Process of making lithographic sheet material for laser imaging Process of making lithographic sheet material for laser imaging

1998-01-26

1999-11-23

Funk, Stephen R.

Printing

Planographic

Lithographic printing plates

101467, 101395, 1014011, B41N 114, B41C 110

Patent

active

059880660

ABSTRACT:
A sheet material suitable for imaging by laser radiation includes a substrate, an adhesive layer comprising a thermoplastic or elastomeric polymer coated onto the substrate, and a particle layer adhered to the adhesive layer and comprising a plurality of carbon or metal or mineral particles that are subject to laser ablation. The particle layer preferably contains alumina particles. The adhesive layer may be filled with particles and is preferably filled with titanium dioxide particles that are more sensitive to laser radiation than the thermoplastic or elastomeric polymer. Preferably, a silicone or silicate layer that is not subject to laser ablation overlies the particle layer.

REFERENCES:
patent: Re35512 (1997-05-01), Nowak et al.
patent: 4461663 (1984-07-01), Tachibana et al.
patent: 5188032 (1993-02-01), Lewis et al.
patent: 5339737 (1994-08-01), Lewis et al.
patent: 5353705 (1994-10-01), Lewis et al.
patent: 5378580 (1995-01-01), Leenders
patent: 5407702 (1995-04-01), Smith et al.
patent: 5440987 (1995-08-01), Williams et al.
Research Disclosure April 1980, 19201 "Method and material for the production of a dry planographic printing plate", p. 131, Leenders et al.

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