Positive image thermal-sensitive UV-resistant printing ink CTP material

A positive image, plate technology, applied in the direction of heat-sensitive coatings, printing plates, printing processes, etc., can solve the problems of poor alcohol resistance of the photosensitive layer, insufficient printing resistance, and the coating film is easily scratched, so as to achieve the printing resistance. Strong, improve print durability, improve solvent resistance and scratch resistance

Active Publication Date: 2019-05-21
LUCKY HUAGUANG GRAPHICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention mainly aims to solve the problems of poor alcohol resistance of the photosensitive layer of the double-layer positive heat-sensitive plate, easy scratching of the coating film, insufficient printing force, etc., and proposes an olefinic copolymer containing benzenesulfonamide group

Method used

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  • Positive image thermal-sensitive UV-resistant printing ink CTP material
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  • Positive image thermal-sensitive UV-resistant printing ink CTP material

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0089] The preparation method of copolymer 1 for lower layer resin layer:

[0090] Add 250g of isopropanol, 150g of deionized water, 30g of N,N-dimethylformamide, 10g of amyl acrylate, and 5g of dioctylsuccinic acid into a 1000ml three-necked flask equipped with a stirrer, a reflux tube, and a dropping funnel. Sodium, 1.2g AIBN (azobisisobutyronitrile), stir evenly, and use hot water bath to heat to 80 ° C, dropwise add 26g N-(4-acetoxyphenyl) maleimide, 27g acrylonitrile , 7g of acrylic acid, 0.8g of AIBN (azobisisobutyronitrile) was dissolved in a mixed solution of 250g of isopropanol, and the addition was completed dropwise in 1.5 hours. The reaction was completed after 8 hours at a constant temperature.

[0091] The solid content is 17.1%, the weight average molecular weight is 28000, and the number average molecular weight is 2100.

[0092] The preparation method of copolymer 2 for the lower resin layer:

[0093] Add 250g of isopropanol, 150g of deionized water, 23g of...

Embodiment 1

[0100] The preparation of lower layer resin layer coating liquid L1, prepares the bottom layer coating liquid of positive heat-sensitive lithographic printing plate precursor according to following formula:

[0101] Prepare the resin layer L1 of the positive thermosensitive lithographic printing plate according to the following formula:

[0102] Prepare the resin layer L1 of the positive thermosensitive lithographic printing plate according to the following formula:

[0103]

[0104] Prepare the heat-sensitive layer coating liquid A of positive heat-sensitive lithographic printing plates according to the following formula:

[0105]

[0106]

[0107] The monomers used to synthesize the copolymer-01 for the upper layer are: styrene, methacrylic acid and p-sulfonamide benzyl methacrylamide.

[0108] The monomers used to synthesize the copolymer-02 for the upper layer are: polyvinyl alcohol, 4-hydroxybenzaldehyde and p-toluenesulfonic acid.

[0109] Example 1 Coating so...

Embodiment 2

[0117] The preparation of lower layer resin layer coating liquid L2, prepares the bottom layer coating liquid of positive heat-sensitive lithographic printing plate precursor according to following formula:

[0118] Prepare the resin layer L2 of the positive thermosensitive lithographic printing plate according to the following formula:

[0119]

[0120]

[0121] Prepare the heat-sensitive layer coating liquid A of positive heat-sensitive lithographic printing plates according to the following formula:

[0122]

[0123] The monomers used to synthesize the copolymer-01 for the upper layer are: styrene, methacrylic acid and p-sulfonamide benzyl methacrylamide.

[0124] The monomers used to synthesize the copolymer-02 for the upper layer are: polyvinyl alcohol, 4-hydroxybenzaldehyde and p-toluenesulfonic acid.

[0125] Example 2 Coating solution L2 is used for the lower layer, and coating solution A for the heat-sensitive layer is used for the upper layer. Plate base i...

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PUM

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Abstract

The invention discloses a positive image thermal-sensitive UV-resistant printing ink CTP material. The positive image thermal-sensitive UV-resistant printing ink CTP material comprises a plate material supporting body. A resin layer coats the plate material supporting body, and a positive image thermal-sensitive photosensitive layer coats the resin layer. The resin layer comprises an anti-solventtype vinyl polymer and background dye, wherein the anti-solvent type vinyl polymer is good in alkali solubility. The positive image thermal-sensitive photosensitive layer is a photosensitive layer which contains an olefinic copolymer and a polyvinyl acetal copolymer, wherein the olefinic copolymer contains a benzene sulfonamide group. The positive image thermal-sensitive UV-resistant printing inkCTP material has the beneficial effects that the positive image thermal-sensitive lithographic plate printing plate material which comprises the structure, the components and a honeycomb structure grained aluminum plate base processed by the special technology has the advantages of being high in chemical resistance, alcohol resistance, printing durability and scratch resistance.

Description

technical field [0001] The invention belongs to the technical field of heat-sensitive positive-working lithographic printing plates, and in particular relates to a positive-working heat-sensitive UV ink-resistant CTP plate material. Background technique [0002] In recent years, with the development of computer graphics processing technology, people's attention has turned to the photosensitive or thermal direct film that is not suitable for silver salt coated film, and the digital imaging information is directly imaged on the substrate through a laser beam or a thermal head. Plate making system. Traditional offset printing is from CTF to CTP, from PS plate to CTP plate, that is, from laser slicing to computer direct plate making, which is a technological innovation of lithographic printing. Higher plate-making efficiency slowly replaced the PS plate market. [0003] Positive thermal CTP plate is a kind of infrared laser scanning exposure, photothermal conversion material c...

Claims

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Application Information

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IPC IPC(8): B41N1/10C09D133/20C09D161/06C09D5/26
Inventor 吴东璟孔祥丽程斌张林李琛琛张苗苗吴丹
Owner LUCKY HUAGUANG GRAPHICS
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