Lithographic printing plate precursor, manufacturing method therefor, plate manufacturing method for lithographic printing plate, and printing method

Patent metadata

Field	Value
Publication number	US-2016339730-A1
Application number	US-201615226212-A
Country	US
Kind code	A1
Filing date	Aug 2, 2016
Priority date	Feb 4, 2014
Publication date	Nov 24, 2016
Grant date	—

Abstract

An object of the present invention is to provide a manufacturing method for a lithographic printing plate precursor which can simplify a manufacturing step while maintaining the performance of preventing edge stains and in which there are neither setter contaminations nor vendor contaminations; the lithographic printing plate precursor; a plate manufacturing method for a lithographic printing plate; and a printing method using the above-described lithographic printing plate.
The manufacturing method for a lithographic printing plate precursor of the present invention includes: an image recording layer forming step of forming an image recording layer as an a step; a coating step of coating a partial region of the image recording layer, which is formed in the a step, with a coating liquid containing a hydrophilic agent, as a b step; and a cutting step of cutting the lithographic printing plate precursor such that the region coated with the above-described coating liquid is in a range within 1 cm from the end portion of the lithographic printing plate precursor after being cut, as a c step, in which the c step is performed after performing either the a step and b step in this order or the b step and the a step in this order, on a hydrophilic aluminum support.

First claim

What is claimed is:

1 . A manufacturing method for a lithographic printing plate precursor, comprising:
an image recording layer forming step of forming an image recording layer as an a step; a coating step of coating a partial region of the image recording layer, which is formed in the a step, with a coating liquid containing a hydrophilic agent, as a b step; and a cutting step of cutting the lithographic printing plate precursor such that the region coated with the coating liquid is in a range within 1 cm from the end portion of the lithographic printing plate precursor after being cut, as a c step, wherein the c step is performed after performing either the a step and b step in this order or the b step and the a step in this order, on a hydrophilic aluminum support.

2 . The manufacturing method for a lithographic printing plate precursor according to claim 1 , further comprising:
an undercoating step of forming an undercoat layer as a d step before the a step.

3 . The manufacturing method for a lithographic printing plate precursor according to claim 1 , further comprising:
a protective layer forming step of forming a protective layer on the image recording layer as an e step before the c step and after the a step.

4 . The manufacturing method for a lithographic printing plate precursor according to claim 1 , comprising:
an undercoating step of forming an undercoat layer on the support as a d step; and a protective layer forming step of forming a protective layer on the image recording layer as an e step, wherein the c step is performed after performing either the b step, the d step, the a step, and the e step in this order, the d step, the b step, the a step, and the e step in this order, the d step, the a step, the b step, the e step in this order, or the d step, the a step, the e step, and the b step in this order, on the hydrophilic aluminum support.

5 . The manufacturing method for a lithographic printing plate precursor according to claim 1 , further comprising:
a step of overlapping compounded paper on an image recording layer side of the support before the c step.

6 . The manufacturing method for a lithographic printing plate precursor according to claim 1 ,
wherein the end portion is cut in the c step such that the sagging amount of the end portion becomes 30 μm to 150 μm.

7 . The manufacturing method for a lithographic printing plate precursor according to claim 1 ,
wherein the coating liquid contains a phosphoric acid compound and/or a phosphonic acid compound as the hydrophilic agent.

8 . The manufacturing method for a lithographic printing plate precursor according to claim 7 ,
wherein the phosphoric acid compound and/or the phosphonic acid compound are polymer compounds.

9 . The manufacturing method for a lithographic printing plate precursor according to claim 7 ,
wherein the coating liquid further contains an anionic or nonionic surfactant as the hydrophilic agent.

10 . The manufacturing method for a lithographic printing plate precursor according to claim 9 ,
wherein the anionic or nonionic surfactant is a polymer compound.

11 . The manufacturing method for a lithographic printing plate precursor according to claim 1 ,
wherein the image recording layer contains an infrared absorber and polymer particles or a binder polymer.

12 . The manufacturing method for a lithographic printing plate precursor according to claim 1 ,
wherein the image recording layer contains the infrared absorber, a polymerization initiator, a polymerizable compound, and the polymer particles or the binder polymer.

13 . The manufacturing method for a lithographic printing plate precursor according to claim 1 ,
wherein the image recording layer contains the infrared absorber and a thermoplastic fine particle polymer.

14 . A plate manufacturing method for a lithographic printing plate, comprising:
a preparation step of preparing the lithographic printing plate precursor obtained through the manufacturing method according to claim 1 ; an exposure step of performing image exposure on the lithographic printing plate precursor; and a processing step of removing an unexposed portion of the image-exposed lithographic printing plate precursor.

15 . The plate manufacturing method for a lithographic printing plate according to claim 14 ,
wherein the processing step is performed through development using a processing liquid.

16 . The plate manufacturing method for a lithographic printing plate according to claim 15 ,
wherein the processing liquid is an alkaline developer or a gum developer.

17 . The plate manufacturing method for a lithographic printing plate according to claim 14 ,
wherein the processing step is performed through on-press development.

18 . A printing method comprising:
printing the lithographic printing plate obtained through the plate manufacturing method according to claim 14 , using printing paper of which the width is wider than that of the lithographic printing plate.

19 . A lithographic printing plate precursor comprising:
an image recording layer on a quadrilateral-shaped hydrophilic aluminum support, wherein a hydrophilic agent is distributed on each region within 1 cm from end portions of two sides, which face each other, of the support, and wherein the hydrophilic agent is not attached to the rear surface of the support.

20 . A lithographic printing plate precursor comprising:
a layer arrangement according to any one of the following i to iv; and a layer containing a hydrophilic agent between a support and the innermost layer of the layer arrangement, between adjacent layers, or on the outermost layer other than a protective layer, wherein the layer containing the hydrophilic agent comes into contact with partial regions of the support, an undercoat layer, an image recording layer, and the protective layer. i: support and image recording layer ii: support, undercoat layer, and image recording layer iii: support, image recording layer, and protective layer iv: support, undercoat layer, image recording layer, and protective layer

21 . The lithographic printing plate precursor according to claim 20 ,
wherein the layer containing the hydrophilic agent exists further inside the outermost layer of the layer arrangement.

22 . The lithographic printing plate precursor according to claim 20 ,
wherein the layer containing the hydrophilic agent exists further outside the undercoat layer of the layer arrangement.

23 . The lithographic printing plate precursor according to claim 20 ,
wherein the layer containing the hydrophilic agent exists further inside the undercoat layer or further outside the image recording layer.

24 . The lithographic printing plate precursor according to any one of claims 22 ,
wherein the hydrophilic agent is a phosphoric acid compound and/or a phosphonic acid compound.

25 . The lithographic printing plate precursor according to claim 24 ,
wherein the phosphoric acid compound and/or the phosphonic acid compound are polymer compounds.

26 . The lithographic printing plate precursor according to claim 24 ,
wherein the coating liquid further contains an anionic or nonionic surfactant as the hydrophilic agent.

27 . The lithographic printing plate precursor according to claim 26 ,
wherein the anionic or nonionic surfactant is a po

Assignees

• Fujifilm Corp

Inventors

• Wariishi Koji
• Hayashi Shunsuke
• Shiraki Fumiya
• Ooshima Atsushi

Classifications

• B41C1/10

  for lithographic printing; Master sheets for transferring a lithographic image to the forme {(chemical or electrical pretreatment B41N3/03)}(neutralising or similar differentiation treatments of lithographic printing formes B41N3/08) · CPC title

• B41N3/08 Primary

  Damping; Neutralising or similar differentiation treatments for lithographic printing formes; {Gumming or finishing solutions, fountain solutions, correction or deletion fluids, or on-press development (treatment of materials containing silver salts G03F7/063; developers per se for processing photosensitive materials G03F7/32)} · CPC title

• B41C1/1016

  characterised by structural details, e.g. protective layers, backcoat layers or several imaging layers · CPC title

• B41F7/02

  for offset printing · CPC title