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

Patent metadata

Field	Value
Publication number	US-2017190167-A1
Application number	US-201715467309-A
Country	US
Kind code	A1
Filing date	Mar 23, 2017
Priority date	Sep 26, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

Provided is a planographic printing plate precursor including: a support; and an image recording layer formed on the support, in which the content of fine particles per unit area in a region on a plate surface on the image recording layer side from an end portion of the planographic printing plate precursor to a portion inside the end portion by 5 mm is greater than the content of the fine particles per unit area in a region other than the region by an amount of 10 mg/m 2 or greater, edge stains are not generated therein, and transferring of the image recording layer is prevented even in a case where planographic printing plate precursors are stored in a stacked state. Further, provided are a method of producing the same and a printing method using the same.

First claim

What is claimed is:

1 . A planographic printing plate precursor comprising:
a support; an image recording layer formed on the support; and fine particles positioned in a region of the planographic printing plate precursor on the image recording layer side, wherein a content of the fine particles per unit area in a first region on the image recording layer side from an end portion of the planographic printing plate precursor to a portion inside the end portion by 5 mm is greater than a content of the fine particles per unit area in a second region other than the first region by an amount of 10 mg/m 2 or greater.

2 . The planographic printing plate precursor according to claim 1 ,
wherein the fine particles are organic resin fine particles.

3 . The planographic printing plate precursor according to claim 2 ,
wherein the organic resin fine particles are microgel particles.

4 . The planographic printing plate precursor according to claim 2 ,
wherein the organic resin fine particles are thermoplastic fine particles.

5 . The planographic printing plate precursor according to claim 1 ,
wherein the fine particles are inorganic fine particles.

6 . The planographic printing plate precursor according to claim 5 ,
wherein the inorganic fine particles are silica, alumina, magnesium oxide, titanium oxide, magnesium carbonate, or a mixture of these.

7 . The planographic printing plate precursor according to claim 1 ,
wherein the end portion of the planographic printing plate precursor has a sagging shape in which a sagging amount X is in a range of 35 to 150 μm and a sagging width Y is in a range of 70 to 300 μm.

8 . The planographic printing plate precursor according to claim 1 ,
wherein the first region further contains a hydrophilic compound.

9 . The planographic printing plate precursor according to claim 8 ,
wherein the hydrophilic compound is a compound which includes a support-adsorptive group.

10 . The planographic printing plate precursor according to claim 9 ,
wherein the compound which includes a support-adsorptive group is a phosphoric acid compound or a phosphonic acid compound.

11 . The planographic printing plate precursor according to claim 10 ,
wherein the phosphoric acid compound or the phosphonic acid compound is a polymer compound.

12 . The planographic printing plate precursor according to claim 1 ,
wherein the image recording layer contains an infrared absorbent, a polymerization initiator, a polymerizable compound, and a binder polymer.

13 . The planographic printing plate precursor according to claim 1 ,
wherein the image recording layer contains an infrared absorbent, a polymerization initiator, a polymerizable compound, and a particulate polymer compound.

14 . The planographic printing plate precursor according to claim 1 ,
wherein the image recording layer contains an infrared absorbent and a thermoplastic fine particle polymer.

15 . A method of producing a planographic printing plate precursor which includes a support; an image recording layer formed on the support; and fine particles positioned in a region of the planographic printing plate precursor on the image recording layer side, in which a content of the fine particles per unit area in a first region on the image recording layer side from an end portion of the planographic printing plate precursor to a portion inside the end portion by 5 mm is greater than a content of the fine particles per unit area in a second region other than the first region by an amount of 10 mg/m 2 or greater, the method comprising:
(a) an image recording layer forming step of forming the image recording layer: (b) a coating step of coating a part of a region where the image recording layer is formed by the step (a) with a coating solution containing the fine particles such that the coating solution and the region overlap each other; and (c) a cutting step of cutting the region coated with the coating solution such that the region is in a range from the end portion of the cut planographic 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.

16 . The method of producing a planographic printing plate precursor according to claim 15 ,
wherein (d) an undercoat layer forming step of forming an undercoat layer is performed on the support before the step (a).

17 . The method of producing a planographic printing plate precursor according to claim 15 ,
wherein (e) a protective layer forming step of forming a protective layer is performed on the image recording layer after the step (a) and before the step (c).

18 . A method of producing a planographic printing plate precursor which includes a support; an image recording layer formed on the support; and fine particles positioned in a region of the planographic printing plate precursor on the image recording layer side, in which a content of fine particles per unit area in a first region on the image recording layer side from an end portion of the planographic printing plate precursor to a portion inside the end portion by 5 mm is greater than a content of the fine particles per unit area in a second region other than the first region by an amount of 10 mg/m 2 or greater, the method comprising:
(a) an image recording layer forming step of forming the image recording layer; and (f) a coating step of coating a region, from the end portion of the planographic printing plate precursor to a portion inside the end portion by 5 mm, with a coating solution containing the fine particles, wherein the steps are performed in order of the step (a) and the step (f) on the support.

19 . The method of producing a planographic printing plate precursor according to claim 18 ,
wherein (d) an undercoat layer forming step of forming an undercoat layer is performed on the support before the step (a).

20 . The method of producing a planographic printing plate precursor according to claim 18 ,
wherein (e) a protective layer forming step of forming a protective layer is performed on the image recording layer after the step (a) and before the step (f).

21 . The method of producing a planographic printing plate precursor according to claim 15 ,
wherein the coating solution containing the fine particles further contains a hydrophilic compound.

22 . The method of producing a planographic printing plate precursor according to claim 21 ,
wherein the hydrophilic compound is a compound having a support-adsorptive group.

23 . The method of producing a planographic printing plate precursor according to claim 22 ,
wherein the hydrophilic compound is a phosphoric acid compound or a phosphonic acid compound.

24 . The method of producing a planographic printing plate precursor according to claim 23 ,
wherein the phosphoric acid compound or the phosphonic acid compound is a polymer compound.

25 . A planographic printing plate precursor which is obtained by the production method according to claim 15 .

26 . A printing method comprising:
performing printing by imagewise-exposing the planographic printing plate precursor according to claim 1 , supplying printing ink and dampening water, and removing an unexposed portion of the image recording layer on a printin

Assignees

• Fujifilm Corp

Inventors

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

Classifications

• G03F7/11

  having cover layers or intermediate layers, e.g. subbing layers {(G03F7/091 - G03F7/093, B41N3/03 take precedence)} · CPC title

• B41C2210/08

  Developable by water or the fountain solution · CPC title

• B41N1/14

  Lithographic printing foils {(B41N1/003, B41N3/03 take precedence; compositions of the image-forming layer B41C1/10)} · CPC title

• B41C2210/04

  Negative working, i.e. the non-exposed (non-imaged) areas are removed · CPC title

• B41P2200/20

  Lithography · CPC title