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

Patent metadata

Field	Value
Publication number	US-10022998-B2
Application number	US-201715654004-A
Country	US
Kind code	B2
Filing date	Jul 19, 2017
Priority date	Feb 13, 2015
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

Provided is a planographic printing plate precursor including: a support; and an image recording layer formed on the support, in which a region on the 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 contains a polymer containing a functional group represented by the following Formula (A), and the content of the polymer per unit area in the region is greater than the content of the polymer per unit area in a region other than the above-described region by an amount of 10 mg/m 2 or greater.

—Si(X) m (R 3 ) n   (A)

First claim

What is claimed is:

1. A planographic printing plate precursor comprising:
a support; and
an image recording layer formed on the support,
wherein a region on a plate surface of the planographic printing plate precursor 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 contains a polymer containing a functional group represented by the following Formula (A), and
the content of the polymer per unit area in the region is greater than the content of the polymer per unit area in a region other than the above-described region by an amount of 10 mg/m 2 or greater,
—Si(X) m (R 3 ) n   (A)

in Formula (A), X represents an alkoxy group, an aryloxy group, an acyloxy group, a hydrogen atom, or a hydroxyl group, R 3 represents a hydrocarbon group, m represents an integer of 1 to 3, and in a case where m represents 2 or 3, X's may be the same as or different from each other, n represents an integer of 0 to 2, and in a case where n represents 2, R 3 's may be the same as or different from each other, and m+n is 3.

2. The planographic printing plate precursor according to claim 1 ,
wherein X in Formula (A) represents an alkoxy group having 1 to 25 carbon atoms.

3. The planographic printing plate precursor according to claim 1 ,
wherein the polymer is an acrylic polymer having a repeating unit derived from a monomer represented by the following Formula (I),

in Formula (I), X represents an alkoxy group having 1 to 25 carbon atoms, an aryloxy group having 6 to 12 carbon atoms, an acyloxy group having 2 to 5 carbon atoms, a hydrogen atom, or a hydroxyl group, R 1 and R 2 each independently represent a hydrogen atom or a hydrocarbon group having 1 to 8 carbon atoms, R 3 represents a hydrocarbon group having 1 to 8 carbon atoms, Z represents a single bond or a divalent linking group, m represents an integer of 1 to 3, and in a case where m represents 2 or 3, X's may be the same as or different from each other, n represents an integer of 0 to 2, and in a case where n represents 2, R 3 's may be the same as or different from each other, and m+n is 3.

4. The planographic printing plate precursor according to claim 3 ,
wherein X in Formula (I) represents an alkoxy group having 1 to 25 carbon atoms.

5. The planographic printing plate precursor according to claim 2 ,
wherein the alkoxy group having 1 to 25 carbon atoms is a methoxy group.

6. The planographic printing plate precursor according to claim 1 ,
wherein the polymer is a polymer further containing a support-adsorptive group.

7. The planographic printing plate precursor according to claim 6 ,
wherein the support-adsorptive group is a phosphoric acid group, a phosphonic acid group, or a salt thereof.

8. The planographic printing plate precursor according to claim 1 ,
wherein the polymer is a polymer further containing a hydrophilic group.

9. The planographic printing plate precursor according to claim 8 ,
wherein the hydrophilic group is a sulfo group or a salt thereof, a carboxy group or a salt thereof, or a sulfobetaine group.

10. 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 m and a sagging width Y is in a range of 70 to 300 μm.

11. The planographic printing plate precursor according to claim 1 ,
wherein the region on the plate surface on the image recording layer side from the end portion to a portion inside the end portion by 5 mm further contains a hydrophilic compound.

12. The planographic printing plate precursor according to claim 11 ,
wherein the hydrophilic compound is a polymer which does not contain silicon atoms.

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

14. The planographic printing plate precursor according to claim 1 ,
wherein the image recording layer contains an infrared absorbing agent, a polymerization initiator, a polymerizable compound, and a polymer compound in a shape of a fine particle.

15. The planographic printing plate precursor according to claim 1 ,
wherein the image recording layer contains an infrared absorbing agent and thermoplastic polymer fine particles.

16. A method of producing a planographic printing plate precursor which includes a support;
and an image recording layer formed on the support, in which a region on a plate surface of the planographic printing plate precursor 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 contains a polymer containing a functional group represented by the following Formula (A), and the content of the polymer per unit area in the region is greater than the content of the polymer per unit area in a region other than the above-described region by an amount of 10 mg/m 2 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 such that the coating solution and the region overlap each other; and
a cutting step c of cutting the region coated with the coating solution such that the region on the plate surface on the image recording layer side 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,
—Si(X) m (R 3 ) n   (A)

in Formula (A), X represents an alkoxy group, an aryloxy group, an acyloxy group, a hydrogen atom, or a hydroxyl group, R 3 represents a hydrocarbon group, m represents an integer of 1 to 3, and in a case where m represents 2 or 3, X's may be the same as or different from each other, n represents an integer of 0 to 2, and in a case where n represents 2, R 3 's may be the same as or different from each other, and m+n is 3.

17. The method of producing a planographic printing plate precursor according to claim 16 ,
wherein an undercoat forming step d of forming an undercoat is performed before the step a.

18. The method of producing a planographic printing plate precursor according to claim 16 ,
wherein a protective layer forming step e of forming a protective layer is performed after the step a and before the step c or after the step a and before the step f.

19. A method of producing a planographic printing plate precursor which includes a support;
and an image recording layer formed on the support, in which a region on a plate surface of the planographic printing plate precursor 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 contains a polymer containing a functional group represented by the following Formula (A), and the content of the polymer per unit area in the region is greater than the content of the polymer per unit area in a region other than the above-described region by an amount of 10 mg/m 2 or greater, the

Assignees

• Fujifilm Corp

Inventors

• Sonokawa Koji

Classifications

• B41C1/1025

  using materials comprising a polymeric matrix containing a polymeric particulate material, e.g. hydrophobic heat coalescing particles · CPC title

• B41C2210/04

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

• B41C2210/08

  Developable by water or the fountain solution · CPC title

• B41F3/81

  Inking units · CPC title

• B41C1/1008

  by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials · CPC title