The invention relates to a multilayer sheet material 10 in the form of a printing blanket or of a printing plate, in particular for the printing of conical or cylindrical vessels made of, for example, plastic, styropore, paperboard, metal, etc., with a multiple-ply printing layer 1,2 made of at least one polymeric material and at least one other layer 3, 4, where the individual layers form, with one another, an adhesive bond that is not amenable to non-destructive separation.

The upper ply 1 of the printing layer, which during the printing procedure faces toward the object to be printed, comprises from 40 to 80 phr of butadiene rubber (BR) and from 20 to 60 phr of butyl rubber (IIR), and the lower ply 2, which during the printing procedure faces away from the object to be printed, comprises from 80 to 100 phr of butyl rubber (IIR).

A gravure roll, in which the outside peripheral surface of a metal roll main body has a plurality of oblique line shaped protrusions forming a prescribed angle with the center axis of the roll main body and the coating liquid can be held in a plurality of oblique line shaped recesses formed between each of the plurality of protrusions, is configured such that the roll main body has a diamond-like carbon layer on the entire outer peripheral surface thereof, a head part for each of the plurality of protrusions is cut down, and each of the plurality of protrusions has a trapezoidal cross-sectional shape that becomes gradually narrower in width moving in direction toward the head part. A separator with a uniform weight per unit area can be manufactured wherein the coating liquid is coated onto a base material film using this gravure roll.

A flexographic printing plate includes at least one halftone printing area with a plurality of halftone dots. A halftone dot of said plurality of halftone dots is shaped as a relief area. Said relief area includes a central portion and a surrounding portion. Said central portion has a central dot floor with a first pattern of a plurality of pins protruding upwardly from the central dot floor. Said surrounding portion protrudes upwardly from the central dot floor and has a top side including a second pattern of a plurality of recesses. The first pattern and second pattern are such that the surrounding portion can be distinguished from the central portion.

The present disclosure provides a printing plate capable of stably suppressing occurrence of a marginal phenomenon. The printing plate includes a printing projection portion having a plurality of projections formed in a distributed manner on a top surface of the printing projection portion, wherein the top surface of the printing projection portion includes a center region and a peripheral edge region adjacent to a peripheral edge of the center region, wherein the peripheral edge region includes printing direction portions extending along a printing direction and perpendicular direction portions extending along a perpendicular direction perpendicular to the printing direction, wherein distribution densities of the projections are different among the center region, the printing direction portions, and the perpendicular direction portions, and wherein, among the distribution densities, a distribution density in the perpendicular direction portions is highest, and a distribution density in the printing direction portions is lowest.

The present disclosure provides a printing plate capable of stably suppressing occurrence of a marginal phenomenon. The printing plate includes a printing projection portion having a plurality of projections formed in a distributed manner on a top surface of the printing projection portion, wherein the top surface of the printing projection portion includes a center region and a peripheral edge region adjacent to a peripheral edge of the center region, wherein the peripheral edge region includes printing direction portions extending along a printing direction and perpendicular direction portions extending along a perpendicular direction perpendicular to the printing direction, wherein distribution densities of the projections are different among the center region, the printing direction portions, and the perpendicular direction portions, and wherein, among the distribution densities, a distribution density in the perpendicular direction portions is highest, and a distribution density in the printing direction portions is lowest.

The present invention is to provide a flexographic printing plate having high ink transferability and making it possible to perform printing with a high ink density in a solid portion, a flexographic printing plate precursor, a method for manufacturing a flexographic printing plate, and a method for manufacturing a flexographic printing plate precursor. A flexographic printing plate of the present invention includes a relief layer including a non-image area and an image area having an uneven structure formed on a surface, in which the uneven structure is composed of recessed portions consisting of a plurality of grooves and projecting portions other than recessed portions, each of the plurality of grooves has a length of at least 30 m, all of the plurality of grooves are grooves having a line edge roughness in a range of 0.5 to 2.5 m in a region of 30 m of the groove in a longitudinal direction, a depth of the recessed portion is 5 to 25 m, and a ratio of the projecting portion is 5% to 60% of a geometric area of the uneven structure.

The present invention is to provide a flexographic printing plate having high ink transferability and making it possible to perform printing with a high ink density in a solid portion, a flexographic printing plate precursor, a method for manufacturing a flexographic printing plate, and a method for manufacturing a flexographic printing plate precursor. A flexographic printing plate of the present invention includes a relief layer including a non-image area and an image area having an uneven structure formed on a surface, in which the uneven structure is composed of recessed portions consisting of a plurality of grooves and projecting portions other than recessed portions, each of the plurality of grooves has a length of at least 30 m, all of the plurality of grooves are grooves having a line edge roughness in a range of 0.5 to 2.5 m in a region of 30 m of the groove in a longitudinal direction, a depth of the recessed portion is 5 to 25 m, and a ratio of the projecting portion is 5% to 60% of a geometric area of the uneven structure.

An object of the present invention is to provide a flexographic printing plate having excellent ink transferability in a solid portion and the like and having good printing quality in a halftone portion. The flexographic printing plate of the present invention is a flexographic printing plate having a relief layer including a non-image area and an image area, in which the image area has a halftone dot portion having a halftone dot area ratio of more than 0% and less than 100%, and a solid portion having a halftone dot area ratio of 100%, small dots in the halftone dot portion and the solid portion or small dots in the halftone dot portion have two or more recessed portions having different depths according to a halftone dot area ratio, and the two or more recessed portions having different depths are recessed portions whose depth becomes deeper as the halftone dot area ratio increases.

An object of the present invention is to provide a flexographic printing plate having excellent ink transferability in a solid portion and the like and having good printing quality in a halftone portion. The flexographic printing plate of the present invention is a flexographic printing plate having a relief layer including a non-image area and an image area, in which the image area has a halftone dot portion having a halftone dot area ratio of more than 0% and less than 100%, and a solid portion having a halftone dot area ratio of 100%, small dots in the halftone dot portion and the solid portion or small dots in the halftone dot portion have two or more recessed portions having different depths according to a halftone dot area ratio, and the two or more recessed portions having different depths are recessed portions whose depth becomes deeper as the halftone dot area ratio increases.

A printing plate includes a plurality of relief areas which stand proud of a floor of the plate, each of the relief areas having an uppermost surface to which, in use, is applied a liquid which is borne by the uppermost surface and subsequently contactingly transferred to a substrate material. A predetermined pattern of depressions define a corresponding pattern of islands within the uppermost surface. The depressions within the uppermost surface include at least primary depressions of a first size and substantially geometric first cross-sectional shape, and secondary depressions, being of smaller cross-sectional area than the primary depressions and having a second cross-sectional shape which is distinctly more elongate than the first cross-sectional shape.