Environmentally-friendly lithographic printing plate base and preparation process thereof

A lithographic printing and environmental protection technology, applied in the field of lithographic printing plate base and its preparation process, can solve problems such as poor fastness, affecting use, and inability to print

Inactive Publication Date: 2012-04-11
石深泉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no report on its use, but according to its formula analysis, amino resin is not a very hydrophilic resin, which will cause dirt during printing and affect its use
[0008] 2. Chinese patent 02128955.7 discloses the patent of inkjet plate-making offset printing plate. The plate is prepared by coating a hydrophilic layer on the aluminum plate. The hydrophilic layer is composed of hydrophilic polymers such as gum arabic, hydroxymethyl cellulose and It is composed of surfactant polyoxyalkylene fatty alcohol ether, and then inkjet prints text images to

Method used

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  • Environmentally-friendly lithographic printing plate base and preparation process thereof
  • Environmentally-friendly lithographic printing plate base and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In this embodiment 1, the plate base material is made of metal aluminum plate with a thickness of 0.05-0.5 mm. The process of preparing for printing is to first clean the metal aluminum plate to remove dirt and oil. Coating adhesive layer on aluminum plate then, the formula that adhesive layer coating is epoxy resin aqueous solution (50%) 35 parts, phenolic resin aqueous solution (30%) 15 parts, water 50 parts, the above components are stirred and dispersed, Make a uniform coating solution, apply it on the aluminum plate by dip coating, and then bake it in an oven at 200°C for 5 minutes to solidify the coating solution into a bonding layer with a thickness of 2-15 μm, and then apply the pro- water layer. The coating liquid formula of the hydrophilic layer is 100 parts of polyvinyl alcohol (10% aqueous solution), 40 parts of nano or micron zinc oxide, 5 parts of hexamethylol melamine resin (50% aqueous solution), sorbitan ester polyoxygen Vinyl ether (4% aqueous soluti...

Embodiment 2

[0058] In this embodiment, the plate base material is also made of metal aluminum plate with a thickness of 0.05-5 mm. The process of preparing the printing plate base is also to first clean the aluminum plate to remove dirt and oil, and then apply an adhesive layer on the aluminum plate. The formula of the bonding layer is 40 parts of water-soluble saturated polyester resin (60%), 10 parts of hexahydroxymelamine resin (50%) and 50 parts of water. Stir and disperse the above components to form a uniform coating solution, then coat the aluminum plate by dip coating, and then bake it in an oven at 200°C for 7 minutes to cure the coating into a bonding layer. Coating thickness is 4-15um. Then coat the hydrophilic layer, and the formula of the hydrophilic layer coating solution is 50 parts of polyvinyl alcohol (10%). 10 parts of acrylic styrene emulsion (40%). 30 parts of nanometer or micron titanium dioxide. Sodium hexametaphosphate (10%) 5 parts. Diisooctyl sodium succinate (4...

Embodiment 3

[0060] The plate base material is a polyester film base with a thickness of 80 μm to 100 μm, and then a bonding layer is coated on the film base. The formula of the bonding layer coating solution is 200 parts of vinylidene chloride emulsion (40%), gelatin (3% ) 400 parts, 100 parts of sodium hydroxide aqueous solution (2%), and 600 parts of resorcinol aqueous solution (15%) were mixed and then stirred and dispersed to form an adhesive layer coating liquid. The coating liquid coating method is dip coating, the coating thickness is 3---10μm, the drying temperature is 90---110°C, and the heating is 5---10 minutes. After drying, a bonding layer is formed, and then the bonding layer is formed. coated with a hydrophilic layer.

[0061] The formula and coating method of the hydrophilic layer coating solution, the drying temperature and time are the same as in Example 1, and the use of the plate base in printing is also the same as in Example 1.

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Abstract

The invention relates to an environmental friendly lithographic printing plate base and a preparation process thereof and belongs to the technical field of printing platemaking. The environmentally-friendly lithographic printing plate base comprises a metal or nonmetal plate base and is characterized in that an adhesion layer and a hydrophilic layer are sequentially adhered to the plate base, the adhesion layer is formed by solidifying an adhesion layer coating liquid, and the hydrophilic layer is formed by solidifying a hydrophilic layer coating liquid. The hydrophilic layer is connected with a base body material through the adhesion layer so as to be firmly integrated to form the lithographic printing plate base, thus the fastness of the plate base is improved. The environmentally-friendly lithographic printing plate base is machined and then can be printed on a printing machine. According to the preparation process disclosed by the invention, the condition that the traditional plate base preparation needs electrolysis coursing and anodic oxidation treatment processes is improved, thus environment pollution caused by the consumption of a large amount of electric energy and the exhaust of a large amount of waste acid is avoided, and the requirements on energy conservation and environment conservation are realized.

Description

technical field [0001] The invention relates to the technical field of printing, in particular to a plate base for lithographic printing and a preparation process thereof. Background technique [0002] Lithographic printing is also called offset printing. The printed graphic part and the non-graphic part, that is, the blank part, are all on the same plane, and are printed using the principle of oil and water repelling each other. That is, the graphic part of the lithographic plate has lipophilic and water-repellent properties, while the blank part has hydrophilic and oil-repellent properties. When printing, the printing ink can only cover and transfer on the graphic part, but not on the blank part, so as to achieve the purpose of printing graphics and text. [0003] Lithographic printing is the most commonly used printing method in the printing industry at present, so the lithographic printing plate base is also an important printing plate base, which is widely used in the ...

Claims

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Application Information

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IPC IPC(8): B41C1/10B41N3/00
Inventor 李三保石深泉
Owner 石深泉
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