Positive thermosensitive CTP version developer solution

A developing solution and heat-sensitive technology, applied in the field of developing solution, can solve the problems that sodium hydroxide strong alkaline substance is irritating and corrosive, affects dot reduction and printing durability, environment and water sources are easy to cause pollution, etc., and achieves good results. Decontamination, improvement of development uniformity, and long service life

Inactive Publication Date: 2012-06-27
PINGYI PRINTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 1. The developer is easy to scale, which makes it difficult to clean the developer;
[0012] 2. The developer has a certain dissolution effect on the photosensitive film, which affects the dot reduction and printing durability;
[0013] 3. The strong alkaline substance of sodium hydroxide added in the developer is irritating and corrosive, which is harmful to human health and easily pollutes the environment and water sources

Method used

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  • Positive thermosensitive CTP version developer solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] After degreasing, electrolysis, oxidation, and hydrophilization, the 0.3mm thick aluminum plate base is coated with a positive thermal CTP photosensitive liquid (manufactured by Pingyi Printing Technology Co., Ltd.) to make a positive thermal CTP plate.

[0046]Positive thermal CTP plate is plated by Creo Trendsetter 800II Quantum plate making machine, laser power 12W, imaging drum speed 185rpm. Developing conditions: developing temperature 23°C; developing time 35S; dynamic fluid replenishment 85cc / sqm; static fluid replenishment 85ml / hr; brush speed 60rpm.

[0047] This example developing solution is the mixture that is made up of following weight ratio composition:

[0048] 73 parts of deionized water

[0049] Sodium silicate 12 parts

[0050] Sodium secondary alkyl sulfonate 5 parts

[0051] Fatty alcohol polyoxyethylene ether 3 parts

[0052] Potassium perfluoroalkyl ether carboxylate 2 parts

[0053] 1 part propylene glycol methyl ether

[0054] Silicone def...

Embodiment 2

[0071] Use a 0.3mm thick aluminum plate base to go through degreasing, electrolysis, oxidation, and hydrophilization, and then apply a positive thermal CTP photosensitive liquid (produced by Pingyi Printing Technology Co., Ltd.) to make a positive thermal CTP plate.

[0072] Positive thermal CTP plate passes through Creo Trendsetter 800II Quantum plate making mechanism with 1%-100% dot image, laser power 12W, imaging drum speed 185rpm. Developing conditions: developing temperature 23°C; developing time 35S; dynamic fluid replenishment 85cc / sqm; static fluid replenishment 85ml / hr; brush speed 60rpm. Use the developer solution of the following weight ratio:

[0073] 80 parts of deionized water

[0074] Sodium silicate 20 parts

[0075] Acrylic acid-maleic acid copolymer 7 parts

[0076] Fatty alcohol polyoxyethylene ether 5 parts

[0077] Potassium perfluoroalkyl ether carboxylate 5 parts

[0078] Propylene glycol methyl ether 2 parts

[0079] Silicone defoamer 0.02 part ...

Embodiment 3

[0102] In this example, the weight ratio of the developer solution components is:

[0103] 75 parts of deionized water

[0104] Sodium silicate 14 parts

[0105] Sodium secondary alkyl sulfonate 6 parts

[0106] Fatty alcohol polyoxyethylene ether 3 parts

[0107] Potassium perfluoroalkyl ether carboxylate 3 parts

[0108] Sodium silicate SiO 2 / Na 2 The molar ratio of O is 1.0

[0109] Using the developing solution of this example, the blank area of ​​the layout is clean, the film retention rate of the photosensitive layer is high, the network dot reduction is good, and the network dots of 1-99% can be reproduced.

[0110] Embodiment 4-6 developer solution composition weight ratio

[0111] Example 4

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Abstract

The invention relates to a positive thermosensitive CTP version developer solution which comprises the following components by weight ratio: 70-80 parts of deionized water, 8-20 parts of silicate with the molar ratio of SiO2 / M2O within the range of 1.0-2.5, 2-10 parts of anion surface active agent, 1-5 parts of non-ionic surface active agent and 1-5 parts of fluorine-containing wetting auxiliary agent. The developer solution has good developing effect, can be used for making a printing plate with high quality, and has the advantages of containing no strong base, not damaging an aluminium plate base, and being good in environment-friendly effect, hard to scale and good in developing fatigue strength.

Description

technical field [0001] The invention belongs to a developing solution, in particular to a developing solution for a positive heat-sensitive CTP plate. Background technique [0002] Positive thermal CTP plates are composed of a support and a heat-sensitive layer. The support is an aluminum plate. The heat-sensitive layer contains a film-forming resin and an infrared-absorbing dye with maximum absorption at 800-830nm. The imaging principle of the CTP version is that the computer uses a digital workflow to directly convert text and images into digital information and use laser scanning to image. In the exposure area, the infrared dye converts the laser energy into heat energy in an instant, and the heat energy causes the photothermal acid generation source to generate a large amount of protonic acid, and the phenolic hydroxyl group of the film-forming resin is released and dissolved in the alkaline developer, exposing the treated aluminum substrate. , is the non-image area of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/32
Inventor 曾小明李兴明富永平徐艳箐缪永梅
Owner PINGYI PRINTING TECH
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