METHOD OF IMPROVED SURFACE CURING OF ELEMENTS FOR FLEXOGRAPHIC DIGITAL PRINTING Russian patent published in 2019 - IPC G03F7/12 B29C35/08 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to a method for manufacturing an element for printing embossed images from a light-cured preform of a printing element. Technical result is achieved in a manner that includes the provision of a light-cured preform printing element. Preform contains a support or carrier layer, a light-curing layer located on the support or carrier layer. In this case, the light-curing layer contains light-curing layers containing: binder, one or more monomers, photosensitizer and an additive, selected from the group comprising phosphites, phosphines, amino compounds of thioethers and combinations of one or more of the above. Preform also contains a laser-removed masking layer located on the light-curing layer and containing a material impermeable to radiation. Further, the method includes selective ablation by the laser of the masking layer removed by laser radiation in order to directly obtain the negative of the desired image in the masking layer removed by the laser radiation. Exposure of the light-curing layer with actinic radiation through directly obtained negative with the aim of selectively stitching and curing the areas of the light-curing layer. Manifestation of the exposed light-curing layer of the light-cured billet of the printing element in order to manifest the relief image on it containing a lot of embossed printing points. Average angle of the ledge of the relief printing points, measured between the ledge of the point across the width of the printing surface of the point, is less than 30°. Sharpness of the edge of embossed printing points, defined as the ratio of the radius r_e of the curvature at the intersection of the ledge and the top of the relief printing point to the width p of the printing surface of the relief point is less than about 5 %.

EFFECT: improved surface curing of elements for digital printing of embossed images.

8 cl, 15 dwg, 1 tbl