Method for preparing aluminum plate base for inkjet computer to plate and hydrophilic coating

Abstract

The invention belongs to a method for preparing an aluminum plate base for printing, and relates to a method for preparing an aluminum plate base for inkjet computer to plate and a hydrophilic coating for coating the surface of the aluminum plate base. The method for preparing the aluminum plate base comprises the steps of deoiling the aluminum plate base, performing electrolysis, dedusting, performing anodic oxidation and the like, and coating the hydrophilic coating on the treated aluminum plate base. The electrolysis and anodic oxidation processes in the prior art are improved, so that a nanometer and micrometer structure can be constructed on the surface after the aluminum plate base is subjected to the anodic oxidation; the diffusion behavior of ink droplets is controlled, and the hydrophilic coating is coated on the surface of the aluminum plate base, so that the aluminum plate base has certain roughness, ink absorption property and high wear resistance simultaneously; printing ink is sprayed on the aluminum plate base coated with the hydrophilic coating by an inkjet computer to plate technology so as to form a text area; and by adjusting the preparation process of the platebase and coating the hydrophilic coating, contrast between the text area and a non-text area during printing is increased, and text resolution is improved.

Description

technical field

[0001] The invention belongs to the field of printing plates, and relates to a method for preparing an aluminum base for printing plates, more specifically to a method for preparing an aluminum base for direct plate-making by inkjet printing, and for the hydrophilicity of the surface coating of the aluminum base coating. The preparation method of the plate base includes plate base degreasing, electrolysis, ash removal, anodic oxidation, etc., and then coating a hydrophilic coating on the above-mentioned treated aluminum plate base. Background technique

[0002] Inkjet computer to plate technology (Inkjet Computer To Plate) is a technology that uses inkjet printing equipment to directly spray images on the processed metal plate or polymer plate. The metal plate base of existing plate making mainly uses aluminum plate. In order to improve the printing resistance and resolution of the aluminum plate base, the aluminum plate base is usually grained (see CN85100...

Examples

Embodiment 1

[0047] Wash the aluminum plate base with water, remove oil in a 40°C degreasing solution (40wt% sodium hydroxide aqueous solution), and then neutralize the degreasing liquid remaining on the aluminum plate base with 2wt% dilute hydrochloric acid solution, heat at 100°C Wash with water.

[0048] Place the aluminum plate base that has been degreased and cleaned up in the electrolytic solution for two electrolysis, the first electrolysis: the concentration of hydrochloric acid in the electrolytic solution is 1wt%, the concentration of tartaric acid is 1wt%, and the concentration of aluminum chloride is 0.01wt%, the balance is water, the electrolysis time is 80s, and the temperature of the electrolyte solution is 40°C; take it out and place it in the electrolyte solution for the second electrolysis: the concentration of hydrochloric acid in the electrolyte solution is 1wt%, and the concentration of tartaric acid is 1wt %, the concentration of aniline is 0.01wt%, the concentration ...

Embodiment 2

[0051] Wash the aluminum base with water, degrease in a 50°C degreasing solution (40wt% sodium hydroxide aqueous solution), then neutralize the degreasing solution remaining on the aluminum base with 2wt% dilute hydrochloric acid solution, heat at 100°C Wash with water.

[0052] Place the aluminum plate base that has been degreased and cleaned up in the electrolytic solution for three electrolysis, the first electrolysis: the concentration of hydrochloric acid in the electrolytic solution is 10wt%, the concentration of diglycolic acid is 0.1wt%, and the concentration of acetic acid is 0.1wt%, the concentration of aluminum sulfate is 0.2wt%, the balance is water, the electrolysis time is 50s, and the temperature of the electrolyte solution is 30°C; take it out and place it in the electrolyte solution for the second electrolysis: the concentration of hydrochloric acid in the electrolyte solution The concentration of diglycolic acid is 0.5wt%, the concentration of acetic acid is ...

Embodiment 3

[0055] Wash the aluminum base with water, remove oil in a 40°C degreasing solution (40wt% sodium hydroxide aqueous solution), then neutralize the degreasing solution remaining on the aluminum base with a 2wt% dilute hydrochloric acid solution, heat at 90°C Wash with water.

[0056] Put the above-mentioned degreased and cleaned aluminum plate base in the electrolyte solution for three electrolysis, the first electrolysis: the concentration of hydrochloric acid in the electrolyte solution is 1wt%, the concentration of malonic acid is 0.05wt%, the concentration of aluminum sulfate is 0.01wt%, the balance is water, the electrolysis time is 40s, and the temperature of the electrolyte solution is 25°C; take it out and place it in the electrolyte solution for the second electrolysis: the concentration of hydrochloric acid in the electrolyte solution is 0.05wt%, malonic acid The concentration of aluminum sulfate is 0.04wt%, the concentration of aluminum sulfate is 0.02wt%, the balance...

technical field

[0001] The invention belongs to the field of printing plates, and relates to a method for preparing an aluminum base for printing plates, more specifically to a method for preparing an aluminum base for direct plate-making by inkjet printing, and for the hydrophilicity of the surface coating of the aluminum base coating. The preparation method of the plate base includes plate base degreasing, electrolysis, ash removal, anodic oxidation, etc., and then coating a hydrophilic coating on the above-mentioned treated aluminum plate base. Background technique

[0002] Inkjet computer to plate technology (Inkjet Computer To Plate) is a technology that uses inkjet printing equipment to directly spray images on the processed metal plate or polymer plate. The metal plate base of existing plate making mainly uses aluminum plate. In order to improve the printing resistance and resolution of the aluminum plate base, the aluminum plate base is usually grained (see CN85100...

Examples

Embodiment 1

[0047] Wash the aluminum plate base with water, remove oil in a 40°C degreasing solution (40wt% sodium hydroxide aqueous solution), and then neutralize the degreasing liquid remaining on the aluminum plate base with 2wt% dilute hydrochloric acid solution, heat at 100°C Wash with water.

[0048] Place the aluminum plate base that has been degreased and cleaned up in the electrolytic solution for two electrolysis, the first electrolysis: the concentration of hydrochloric acid in the electrolytic solution is 1wt%, the concentration of tartaric acid is 1wt%, and the concentration of aluminum chloride is 0.01wt%, the balance is water, the electrolysis time is 80s, and the temperature of the electrolyte solution is 40°C; take it out and place it in the electrolyte solution for the second electrolysis: the concentration of hydrochloric acid in the electrolyte solution is 1wt%, and the concentration of tartaric acid is 1wt %, the concentration of aniline is 0.01wt%, the concentration ...

Embodiment 2

[0051] Wash the aluminum base with water, degrease in a 50°C degreasing solution (40wt% sodium hydroxide aqueous solution), then neutralize the degreasing solution remaining on the aluminum base with 2wt% dilute hydrochloric acid solution, heat at 100°C Wash with water.

[0052] Place the aluminum plate base that has been degreased and cleaned up in the electrolytic solution for three electrolysis, the first electrolysis: the concentration of hydrochloric acid in the electrolytic solution is 10wt%, the concentration of diglycolic acid is 0.1wt%, and the concentration of acetic acid is 0.1wt%, the concentration of aluminum sulfate is 0.2wt%, the balance is water, the electrolysis time is 50s, and the temperature of the electrolyte solution is 30°C; take it out and place it in the electrolyte solution for the second electrolysis: the concentration of hydrochloric acid in the electrolyte solution The concentration of diglycolic acid is 0.5wt%, the concentration of acetic acid is ...

Embodiment 3

[0055] Wash the aluminum base with water, remove oil in a 40°C degreasing solution (40wt% sodium hydroxide aqueous solution), then neutralize the degreasing solution remaining on the aluminum base with a 2wt% dilute hydrochloric acid solution, heat at 90°C Wash with water.

[0056] Put the above-mentioned degreased and cleaned aluminum plate base in the electrolyte solution for three electrolysis, the first electrolysis: the concentration of hydrochloric acid in the electrolyte solution is 1wt%, the concentration of malonic acid is 0.05wt%, the concentration of aluminum sulfate is 0.01wt%, the balance is water, the electrolysis time is 40s, and the temperature of the electrolyte solution is 25°C; take it out and place it in the electrolyte solution for the second electrolysis: the concentration of hydrochloric acid in the electrolyte solution is 0.05wt%, malonic acid The concentration of aluminum sulfate is 0.04wt%, the concentration of aluminum sulfate is 0.02wt%, the balance...

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