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Direct platemaking offset plate of ink-jetting computer

A computer and offset printing plate technology, which is applied in the photoengraving process of the pattern surface, opto-mechanical equipment, and photosensitive materials for opto-mechanical equipment, etc. and other problems, to achieve the effect of fast absorbing ink, easy to wash and good image quality

Inactive Publication Date: 2009-08-19
石深泉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Although the above patents are used to manufacture ink-jet computer-to-plate offset printing plates, patents CN1295307A and CN1476988A have also added polymer emulsions, such as acrylic acid and acrylate copolymer emulsions, in order to improve the adhesion between the image receiving layer and the photosensitive layer. Polyvinyl acetate emulsion, which not only consumes more medicines and increases the cost, but also increases the difficulty of washing the ink-jet receiving layer with water after exposure, and is not easy to clean with water
In patent CN1444098A, in addition to coating an ink receiving layer, a layer of ink solvent absorption and anti-sticking layer is applied, which increases the coating process and increases the difficulty and cost of operation

Method used

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  • Direct platemaking offset plate of ink-jetting computer

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example 1

[0034] 1.1 Preparation of coating solution

[0035] Hydroxypropyl Methyl Cellulose 2.5g.

[0036] Diisooctyl sodium succinate sulfonate 4% aqueous solution 2 ml.

[0037] Microporous colloidal silica 1.25g

[0038] Water 95.5ml.

[0039] 1.2 Preparation of offset printing plate of the present invention

[0040] Disperse the above materials by ball milling for 8 hours and then filter to obtain a uniform coating solution, the content of which is about 3-4%, and then apply this solution on the photosensitive layer of the positive PS plate by roller coating method, and then apply The amount is 2-3 grams per square meter, and the drying temperature is 80-85°C.

example 2

[0042] 2.1 Preparation of coating solution

[0043] Carrageenan 50% aqueous solution 8g

[0044] Sorbitan ester and polyoxyethylene compound 4% aqueous solution 4ml

[0045] Microporous colloidal alumina 2 grams

[0046] water 88ml

[0047] 2.2 Preparation of offset printing plate of the present invention

[0048] Disperse the above materials by ball milling for 8 hours and then filter to obtain a uniform coating solution with a solid content of about 6-7%. Then this solution is coated on the photosensitive layer of the positive PS plate by roller coating. The cloth weight is 2-4 g / m2, and the drying temperature is 80-85°C.

example 3

[0050] 3.1 Preparation of coating solution

[0051] Water-soluble alkyd resin 50% aqueous solution 10g

[0052] 4% aqueous solution of diisooctyl sulfonate sodium succinate 2 ml

[0053] Microporous colloidal silicon dioxide 2 grams

[0054] water 86ml

[0055] 3.2 Prepare the offset printing plate of the present invention

[0056] Disperse the above materials by ball milling for 8 hours and then filter to obtain a uniform coating solution with a solid content of about 7-8%. Then this solution is coated on the photosensitive layer of the positive PS plate by roller coating. The cloth weight is 2-5 g / m2, and the drying temperature is 80-85°C.

[0057] In the present invention, some commonly used chemical additives, such as defoamers, antioxidants, and pH regulators can be added to the coating solution to make the offset printing plate more functional.

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Abstract

The invention relates to an ink-jet type computer-to-plate offset printing plate. The manufacturing method of this printing plate is to coat a layer of ink-jet receiving layer on the photosensitive layer of an ordinary aluminum-based positive PS plate. The ink-jet receiving layer is mainly It is composed of water-soluble macromolecule and surfactant, and its weight ratio is 30-60:1, and porous particle filler is also added. This kind of inkjet receiving layer absorbs ink quickly, has good image quality, and can improve the stability of the plate. When making a plate, the image is printed on the inkjet receiving layer, and then after printing and washing, it is developed to make an offset printing plate and can be used on an offset printing machine. print.

Description

technical field [0001] The invention relates to an ink-jet direct plate-making offset printing plate. Background technique [0002] For a long time, film has been used in the production of offset printing plates, and film processing is a photographic process that requires optical devices, photosensitive materials and chemical processing methods, and it is also an operation process with many processing steps. [0003] CTP technology (Computer to plate) refers to computer direct plate making, which saves the film used for plate making, and thus does not require film and film processing. The current CTP offset printing plates mainly include photosensitive CTP plates and thermal CTP plates, etc. CTP technology brings a simple workflow to the plate making process, but until now it has been aimed at high-end commercial printing machines for expensive systems. The price of CTP plates is one to two times higher than that of ordinary PS plates, and the price of equipment for process...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/09G03F7/00
Inventor 李三保
Owner 石深泉
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