Electrowetting-based dampening water applying method and system and application

A technology of dampening water and electrowetting, which is applied to lithographic rotary printing machines, printing, rotary printing machines, etc., can solve the problems of dampening water that have not been reported yet, and achieve the goals of shortening water supply time, high-quality printing, and reducing consumption Effect

Active Publication Date: 2019-04-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, electrowetting is widely used in the fields of display, fluid manipulation, micro-zoom lens, etc., but it has not been reported for the application of dampening water and lithography.

Method used

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  • Electrowetting-based dampening water applying method and system and application
  • Electrowetting-based dampening water applying method and system and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A method for applying dampening water based on electrowetting, comprising the following steps:

[0048] 1) Add dampening water into the bucket; said dampening water is tap water;

[0049] 2) Start the water roller. The water roller includes a metal roller and a dielectric layer covering the outer surface of the metal roller. The dielectric layer of the water roller is in contact with the dampening water, that is, the metal roller part does not contact the dampening water. contact; the dielectric layer is a ceramic layer; the thickness of the dielectric layer is 1 μm.

[0050] 3) Simultaneously energize the dampening water in the water bucket and the metal roller, so that the dampening water is transferred from the water roller to the printing plate in the form of a continuous and uniform water film. The potential difference between the dampening water and the metal roller is 1V. The thickness of the water film on the water roller is 5 μm, and the contact angle is abou...

Embodiment 2

[0057] A method for applying dampening water based on electrowetting, comprising the following steps:

[0058] 1) Add dampening water into the bucket; the dampening water is deionized water;

[0059] 2) Start the water roller. The water roller includes a metal roller and a dielectric layer covering the outer surface of the metal roller. The dielectric layer of the water roller is in contact with the dampening water, that is, the metal roller part does not contact the dampening water. contact; the dielectric layer is a glass layer; the thickness of the dielectric layer is 10mm.

[0060] 3) The dampening water and the metal roller in the water bucket are energized at the same time, so that the dampening water is transferred from the water roller to the printing plate in the form of a continuous and uniform water film; The potential difference between them is 1000V. The thickness of the water film on the water roller is 3 μm, and the contact angle is about 30°.

[0061] An app...

Embodiment 3

[0067] A method for applying dampening water based on electrowetting, comprising the following steps:

[0068] 1) Add dampening water into the bucket; the dampening water is distilled water;

[0069] 2) Start the water roller. The water roller includes a metal roller and a dielectric layer covering the outer surface of the metal roller, and the dielectric layer of the water roller is in contact with dampening water; the dielectric layer is quartz glass layer; the thickness of the dielectric layer is 10 μm.

[0070] 3) The dampening water and the metal roller in the water bucket are energized at the same time, so that the dampening water is transferred from the water roller to the printing plate in the form of a continuous and uniform water film; The potential difference between them is 500V. The thickness of the water film on the water roller is 0.1 μm, and the contact angle is about 10°.

[0071] An application of a dampening water application method based on electrowettin...

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Abstract

The invention discloses an electrowetting-based dampening water applying method and system and application. The method comprises the following steps that (1) dampening water is added into a fountain;(2) a water roller is started and comprises a metal roller and a dielectric layer covering the outer surface of the metal roller, and the dielectric layer of the water roller is in contact with the dampening water; and (3) the dampening water in the fountain and the metal roller are powered on at the same time, the dampening water is conveyed to a printing plate from the water roller in a continuous and uniform water film manner, and the method is completed. The electrowetting principle is innovatively adopted for dampening water applying, the surface tension of the dampening water can be greatly reduced, and a water film is stably and uniformly formed on the surface of the water roller in an attached manner; and the use level of surface active materials including alcohol in the dampeningwater can be greatly reduced, even high-quality printing can be achieved without adding any surface active materials, and operation is efficient and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of printing, and in particular relates to a method for applying dampening water based on electrowetting, a system and an application thereof. Background technique [0002] Lithographic printing means that during printing, the graphic part and the non-graphic part of the printing plate are almost on the same plane. The plate water application system supplies water to the non-graphic part of the printing plate, and then the ink supply device of the printing system supplies ink to the printing plate. Since the non-graphic part of the printing plate is protected by water, the ink can only be supplied to the printing plate Finally, transfer the ink on the printing plate to the blanket, and then use the pressure between the rubber cylinder and the impression cylinder to transfer the ink on the blanket to the substrate to complete the printing. The printing system uses the principle that oil and water are immiscib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F7/24B41M1/06
CPCB41F7/24B41M1/06
Inventor 田森林赵群黄建洪李英杰胡学伟宁平宋玉新蒋仕飞
Owner KUNMING UNIV OF SCI & TECH
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