US 2017/0320351 A1 · LITHOGRAPHIC PRINTING PLATE PRECURSOR, METHOD OF PRODUCING SAME, AND PRINTING METHOD USING SAME

Abstract

Provided are a lithographic printing plate precursor for furnishing a lithographic printing plate in which adhesion to interleaving paper is prevented, contamination inside a device is prevented, and edge stain does not occur; a method of producing the same; and a printing method using the same. The lithographic printing plate precursor includes: a support; and an image recording layer on the support, in which a region of a surface of the lithographic printing plate precursor at a side of the image recording layer, which is from an end portion of the lithographic printing plate precursor to a portion inside the end portion by 5 mm, contains at least one polymer selected from polyamide, polyurethane, polyurea, polyester and polycarbonate, and has a content of the polymer per unit area which is greater than a content of the polymer per unit area in a region other than the above-described region by an amount of 10 mg/m2 or greater.

Claims17

Dependent claims

A lithographic printing plate precursor comprising:

a support;
and
an image recording layer on the support,
wherein a region of a surface of the lithographic printing plate precursor at a side of the image recording layer, which is from an end portion of the lithographic printing plate precursor to a portion inside the end portion by 5 mm, contains at least one polymer selected from polyamide, polyurethane, polyurea, polyester and polycarbonate, and has a content of the polymer per unit area which is greater than a content of the polymer per unit area in a region other than the region of a surface of the lithographic printing plate precursor at a side of the image recording layer by an amount of 10 mg/m2 or greater.

1 more element

A method of producing a lithographic printing plate precursor which includes a support;

and an image recording layer on the support, in which a region of a surface of the lithographic printing plate precursor at a side of the image recording layer, which is from an end portion of the lithographic printing plate precursor to a portion inside the end portion by 5 mm, contains at least one polymer selected from polyamide, polyurethane, polyurea, polyester and polycarbonate, and has a content of the polymer per unit area which is greater than a content of the polymer per unit area in a region other than the region of a surface of the lithographic printing plate precursor at a side of the image recording layer by an amount of 10 mg/m2 or greater, the method comprising:
an image recording layer forming step a of forming the image recording layer;
a coating step b of coating a region of a part of the image recording layer which is formed by the step a with a coating solution containing the polymer so that the coating solution and the region overlap each other;
and
a cutting step c of cutting so that the region coated with the coating solution is within the region of a surface of the lithographic printing plate precursor at a side of the image recording layer which is from the end portion of the cut lithographic printing plate precursor to a portion inside the end portion by 5 mm,
wherein the steps are performed in order of the step a, the step b and the step c or in order of the step b, the step a and the step c, on the support.

3 more elements

A method of producing a lithographic printing plate precursor which includes a support;

and an image recording layer on the support, in which a region of a surface of the lithographic printing plate precursor at a side of the image recording layer, which is from an end portion of the lithographic printing plate precursor to a portion inside the end portion by 5 mm, contains at least one polymer selected from polyamide, polyurethane, polyurea, polyester and polycarbonate, and has a content of the polymer per unit area which is greater than a content of the polymer per unit area in a region other than the region of a surface of the lithographic printing plate precursor at a side of the image recording layer by an amount of 10 mg/m2 or greater, the method comprising:
an image recording layer forming step a of forming the image recording layer;
and
a coating step f of coating a region of a surface of the lithographic printing plate precursor at a side of the image recording layer, which is from the end portion of the lithographic printing plate precursor to a portion inside the end portion by 5 mm, with a coating solution containing the polymer,
wherein the steps are performed in order of the step a and the step f on the support.

2 more elements

Dependencies are inferred from the claim text.

Lithographic printing plate precursor, method of producing same, and printing method using same

Life of this patent

Lithographic printing plate precursor, method of producing same, and printing method using same

Life of this patent

Abstract

Claims17