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Coating of aluminum substrate for direct plate making of ink-jet printing, production method and use

An inkjet printing, aluminum plate-based technology, applied in the preparation, coating, printing and other directions of the printing surface, can solve the problems of easy environmental pollution and high plate cost, save the post-processing process, high specific surface area Can and avoid the effect of environmental pollution

Active Publication Date: 2009-04-01
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the printing durability and resolution of the aluminum plate base, it is usually necessary to anodize and grain the aluminum plate (see CN85100875). When anodizing, a large amount of acid and alkali must be used to pretreat the aluminum plate base. However, acid and alkali waste liquids not only easily cause great pollution to the environment, but also increase the overall cost of the plate. In the patent CN1295307, natural water-soluble polymers and synthetic water-soluble polymers are used for the image receiving layer. The aluminum plate used The base is still anodized

Method used

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  • Coating of aluminum substrate for direct plate making of ink-jet printing, production method and use
  • Coating of aluminum substrate for direct plate making of ink-jet printing, production method and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 1.25g polyvinyl alcohol (polymerization degree 1700, alcoholysis degree 99%), particle diameter is 2~3 μ m silicon dioxide 3.75g, put into 50ml Erlenmeyer flask, add 20g distilled water, stir 6~8 hours, make It dissolves well. Cut the aluminum plate into 10×10cm 2 , washed with acetone and distilled water successively, and dried. Spin the paint on the aluminum plate by spin coating on the glue leveler, bake it at 100°C for about 3 hours, and measure the contact angle and adhesion of the plate, see Table 1 and Table 2.

Embodiment 2

[0027] Weigh 1g of polyvinyl alcohol (polymerization degree 2500, degree of alcoholysis 88%), 0.5g of polyvinylpyrrolidone K-30, 0.25g of silicon dioxide with a particle size of 10-20nm, put them into a 50ml Erlenmeyer flask, add 23.75g Distilled water, 5ml of ethanol, stirred for 6-8 hours to fully dissolve. Cut the aluminum plate into 10×10cm 2 , washed with acetone and distilled water successively, and dried. The coating composition was coated on the aluminum plate by spin coating on a coater, and baked at 200° C. for 0.5 hour. The contact angle and adhesion of the plate were measured, as shown in Table 1 and Table 2.

Embodiment 3

[0029] Weigh 1g polyvinyl alcohol (polymerization degree 2500, alcoholysis degree 88%), particle diameter is 0.25g of silicon dioxide of 2~3μm, put into 50ml Erlenmeyer flask, add 23.75g distilled water, stir 6~10 hours, make It dissolves well. Cut the aluminum plate into 10×10cm 2 , washed with acetone and distilled water successively, and dried. The coating composition was coated on the aluminum plate by spin coating on a coater, and baked at 150° C. for about 1 hour. The contact angle and adhesion of the plate were measured, as shown in Table 1 and Table 2.

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Abstract

The invention relates to a coating for aluminum lithographic supports applied to direct ink jet stencil making, a preparation process and application thereof. The coating is prepared by mixing 0.5-15wt percent of hydrophilic high molecular polymer, 0.5-15wt percent of nanometer or micrometer-sized oxide particles, 0-1wt percent of additive and 80-98wt percent of solvent with agitating at room temperature. The coating can avoid the problem that acid or alkaline waste liquid produced after anodic oxidation treatment of aluminum lithographic supports can cause great pollution to the environment. After thermocuring of the coating, aluminum lithographic supports can absorb ink and can be directly printed after ink jet CTP stencil making, thus reducing the post-treatment process. The coating has good adhesion to aluminum lithographic supports; after the coating is applied to aluminum lithographic supports, due to presence of the nanometer or micrometer-sized oxide particles, the aluminum lithographic supports can have high specific surface energy and satisfy requirements on ink absorbance and environment protection; in addition, surfaces of the aluminum lithographic supports have high wear resistance.

Description

technical field [0001] The invention belongs to the field of printing plate materials, relates to an aluminum plate base with good wear resistance and ink affinity, and more particularly relates to a coating that can be used for an aluminum plate base for inkjet printing direct plate making (CTP) and a preparation method and application thereof. Background technique [0002] Inkjet printing CTP technology is a technology that uses inkjet printing equipment to directly spray images on the plate base. At present, the printing plate base mainly uses aluminum plate base. In order to improve the printing durability and resolution of the aluminum plate base, it is usually necessary to anodize and grain the aluminum plate (see CN85100875). When anodizing, a large amount of acid and alkali must be used to pretreat the aluminum plate base. However, acid and alkali waste liquids not only easily cause great pollution to the environment, but also increase the overall cost of the plate....

Claims

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Application Information

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IPC IPC(8): C09D129/04C09D189/00C09D129/14C09D161/14C09D101/26C09D133/08C09D133/02B41N3/00
Inventor 周海华宋延林
Owner INST OF CHEM CHINESE ACAD OF SCI
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