Digital printed webs and sheets with semi-interpenetrating polymer primer layers
AssigneeDaybreak Technologies, Inc.
InventorTimothy J. Leeper
Life of this patent
Estimating the term…
Abstract
A digital printing process that applies a liquid radiation curable primer containing 20 to 80% of at least one acrylate functional monomer and 20 to 60% of at least one thermoplastic polyurethane polymer onto a surface of a flat web or sheet substrate; cures the primer by UV or EB irradiation to give a dry, tack-free surface; and then uses a digital printing press that uses a liquid-toner-based electrographic imaging process with a press blanket to transfer a printed image from the press blanket to the cured-primer coated substrate. The resulting printed web or sheet may have a dry, tack-free semi-interpenetrating polymer network layer adjacent the printed image.
Claims28
A digital printing process comprising:
- a. applying a liquid radiation curable primer containing 20 to 80% of at least one acrylate functional monomer and 20 to 60% of at least one thermoplastic polyurethane polymer onto a surface of a flat web or sheet substrate;
- b. curing the primer by UV or EB irradiation to give a dry, tack-free surface;
- and
- c. using a digital printing press that uses a liquid-toner-based electrographic imaging process with a press blanket to transfer a printed image from the press blanket to the cured-primer coated substrate.
A printed web or sheet comprising:
- a. a flat web or sheet substrate;
- b. a dry, tack-free semi-interpenetrating polymer network layer on a surface of the substrate comprising at least one UV or EB polymerized acrylate monomer and at least one thermoplastic polyurethane polymer;
- and
- c. an image layer of tack-free dried liquid electrographic ink adjacent said semi-interpenetrating polymer network layer.
Dependencies are inferred from the claim text.