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A kind of degreasing method of aluminum base for ctp plate production

An aluminum plate base and aluminum plate technology, which is applied in the field of degreasing the surface of aluminum and aluminum alloys, can solve problems such as nozzle or nozzle clogging, blue spot and blue spot, uneven degreasing, etc., and achieves large span and long film path Effect

Active Publication Date: 2016-02-03
安徽强邦新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two methods have their own advantages and disadvantages: the soaking method corrodes evenly, but the corrosion on the front and the back is the same, and the hydrogen gas on the back is not easy to discharge; the degreasing liquid in the spraying method has a fast renewal speed, high degreasing efficiency, and easy discharge of hydrogen gas; but the spray hole is easy to block causing uneven corrosion
If the back of the plate is not clean, it will definitely cause incorrect focus and blue spots
Even if the back of the plate is actually clean, but the back of the plate is unclean due to uneven degreasing and rolling lines of the aluminum plate, customers still refuse to use it, because they are worried that the dirty back of the CTP plate will contaminate or even damage the plate. The optical drum of its CTP platemaking machine
[0006] In view of the above reasons, most CTP plate manufacturers now abandon the soaking method in the degreasing process and change to the spraying method, because the corrosion degree of the front and back of the soaking method is the same, and the hydrogen produced by the reaction on the back will swell the plate and cause scratches or tension fluctuations
The spraying method can achieve the purpose of sufficient front corrosion and mild back corrosion by having more nozzles on the front and fewer nozzles on the back, but it has the following disadvantages: due to the high temperature and high concentration of the degreasing liquid, it is easy to crystallize, and it is easy to cause damage to the spray pipes. The nozzles or spray holes on the surface are clogged. Once the clogging is difficult to find and deal with, especially on the back, it will cause uneven corrosion and form flow marks, making the back even more unsightly.

Method used

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  • A kind of degreasing method of aluminum base for ctp plate production

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Embodiment Construction

[0020] The temperature control and concentration control of the degreasing liquid are completed in the lower tank. After the pump and coarse filtration, the nozzle that hits the upper tank is sprayed to the front surface of the aluminum plate base through the upper nozzle hole, and flows into the small outlet end along the slope of the aluminum plate front After filling the small tank, it overflows to the upper tank for degreasing, flows back to the lower tank through the return pipe of the upper tank, and completes a tank liquid cycle; the front of the aluminum plate uses the spray method and the outlet end immersion method, due to the long reaction time , To be fully corroded; the back of the aluminum plate is only immersed at the outlet end. Due to the immersion method, the corrosion is uniform and the time is short, so the back of the aluminum plate is clean and maintains metallic luster.

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Abstract

The invention relates to a deoiling method, for deoiling on a surface of an aluminum plate base for producing a CTP plate. The method is characterized in that: the method well and synthetically utilizes advantages of immersion mode and spray mode, wherein a front face of the aluminum plate base employs the spray mode with long reaction time, in order to smoothly discharge hydrogen generated in reaction without causing plate band disturbance while the front face is fully corroded; and a back face of the aluminum plate base employs the immersion mode with short reaction time, in order to reach uniform back corrosion and light corrosion to maintain luster. So, the back face of the aluminum plate base is lightly corroded to keep the back face of the plate beautiful and clean while the front face is fully corroded.

Description

Technical field [0001] The invention relates to a degreasing method for aluminum and aluminum alloy surfaces. This method is mainly suitable for the degreasing process of aluminum plate base in the continuous production process of CTP plate. technical background [0002] CTP plate and PS plate are coated with a photosensitive layer on the surface of the aluminum plate base. In order to make the aluminum plate substrate have a good adsorption effect on the photosensitive layer, the surface of the aluminum plate substrate must undergo a series of surface treatments: degreasingneutralizationelectrolysis→oxidation→sealing and other processes. [0003] In the degreasing process, we often use NaOH solution, add some buffers, emulsifiers, etc. In order to improve oil removal efficiency, the temperature is usually increased to 50-90°C. In the process of degreasing, in addition to the saponification reaction between aluminum surface grease and NaOH, aluminum and NaOH react to generate ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/22C23G1/16
Inventor 孙长义
Owner 安徽强邦新材料股份有限公司
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