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Lithographic plate for laser digital scanning and its preparation method

A digital scanning and laser technology, applied in the field of printing lithography, can solve the problems of complex plate making process, restricted promotion and expensive equipment.

Active Publication Date: 2010-01-27
龙马铝业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two plates have a higher market price, which is more than double the price of the traditional PS plate.
Moreover, the plate-making process is complicated, the equipment is expensive, and the storage period is short, which has caused many unfavorable factors for the promotion of CTP technology.
To a large extent, it restricts the promotion of this technology in developing countries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] A, the preparation of plate base;

[0068] The purity is 99.5%, and the other metals are: Zn≤0.03%, Mn≤0.05%, Fe≤0.2%, Mg≤0.04%, Cu≤0.03%, Si≤0.15%. The purity of the aluminum strip is 10%. Sodium hydroxide solution, wash at 50°C for 60 seconds, then neutralize with hydrochloric acid to make PH = 6, after washing with water, form an electrolysis circuit with graphite electrodes under the action of alternating current, use hydrochloric acid with a purity of 1.5%, and electrolyze the plate Chemical treatment; the electrochemical treatment is divided into 3 stages, the current of the first stage is 2800A, the current of the second stage is 1300A, the current of the third stage is 1800A, the voltage is 14V, the pole distance is 1cm, the temperature is 30°C, and the time is 180 seconds, and the surface roughness Ra is 0.55. porous surface. After the roughened layout is washed with a 5% sodium hydroxide solution to remove dust and water, it is then oxidized at a temperature ...

Embodiment 2

[0090] A, the preparation of plate base;

[0091] The purity is 99.5%, and the other metals are: Zn≤0.03%, Mn≤0.05%, Fe≤0.2%, Mg≤0.04%, Cu≤0.03%, Si≤0.15%, the aluminum plate strip has a purity of 5% Sodium hydroxide solution, wash at 60°C for 120 seconds, then neutralize with hydrochloric acid to make the pH = 5.5, after washing with water, form an electrolysis circuit with graphite electrodes under the action of alternating current, use hydrochloric acid with a purity of 1.8%, and electrolyze the plate. Chemical treatment; the electrochemical treatment is divided into 3 stages, the current of the first stage is 3000A, the current of the second stage is 1500A, the current of the third stage is 2000A, the voltage is 20V, the pole distance is 3cm, the temperature is 25°C, and the time is 240 seconds, and the surface roughness Ra is 0.65. porous surface. After the roughened layout is washed with a 5% sodium hydroxide solution to remove dust and water, it is oxidized at a temper...

Embodiment 3

[0113] A, the preparation of plate base;

[0114] The purity is 99.5%, and the other metals are: Zn≤0.03%, Mn≤0.05%, Fe≤0.2%, Mg≤0.04%, Cu≤0.03%, Si≤0.15%, the purity of the aluminum strip is 6% Sodium hydroxide solution, wash at 55°C for 90 seconds, then neutralize with hydrochloric acid to make PH = 5, wash with water, and form an electrolytic circuit with graphite electrodes under the action of alternating current, use hydrochloric acid with a purity of 2% to clean the layout Electrochemical treatment; the electrochemical treatment is divided into 3 stages, the current of the first stage is 2500A, the current of the second stage is 1250A, the current of the third stage is 1750A, the voltage is 15V, the pole distance is 5cm, the temperature is 35°C, and the time is 240 seconds. The surface roughness Ra is 0.60 porous surface. After the roughened layout is washed with 7% sodium hydroxide solution to remove ash and water, it is oxidized under 18V voltage and 5500A direct curr...

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PUM

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Abstract

The invention relates to printing lithography, in particular to a printing lithographic plate (UV-CTP) for laser digital scanning and the preparation method thereof. The preparation method of the printing lithographic plate (UV-CTP) comprises the following steps: firstly cleaning, neutralizing, electrolyzing and oxidizing aluminum plate strip materials and hole-sealing to obtain the plate base; then, spread-coating the prepared photosensitive coating liquid on the plate base through extruding; and obtaining the UV-CTP after drying. The UV-CTP plate, following the photosensitive CTP plate and the thermosensitive CTP plate, belongs to a novel plate which can be directly imaged through computer digital laser scanning without pretreatment. Compared with the conventional PS plate and CTP plate, the UV-CTP plate has the following characteristics and advantages that the aluminum plate rolling technique with low deformation rate and low surface defect ensures that the plate base of the plate has better physical properties, particularly, the UV-CTP plate is advantageous in manufacturing cost, preservation period and universality over other CTP plates; and the UV-CTP plate has the characteristics of high dot reducibility, high photosensitive speed, great operating latitude and wide application, etc., therefore, the UV-CTP plate is applicable to printing materials, such as metal, plastic, etc., by the UV ink.

Description

technical field [0001] The invention relates to a printing plate, in particular to a printing plate (UV-CTP) for laser digital scanning and a preparation method thereof. Background technique [0002] The China Printing and Equipment Industry Association proposed a 28-character policy for the development of my country's printing and equipment industry in the first 10 to 15 years of the 21st century, namely: "Pre-press digital, network, printing multi-color, high-efficiency, post-press diverse, automated , high-quality and serialized equipment." It points out the direction for the future technological development of China's printing industry. Under the development trend of digitalization in the printing industry, the digitalization of prepress work such as design and plate making plays a decisive role in the quality of printed products and printing efficiency, and has become the core of the entire printing process. Computer-to-plate (CTP) technology has attracted more and mor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03F7/09
Inventor 王晓军
Owner 龙马铝业集团有限公司
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