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Polyimide stripping liquid, preparation method thereof and cleaning method of polyimide film

A technology of polyimide and stripping liquid, which is applied in the field of polyimide stripping liquid and polyimide film cleaning, and can solve problems such as corrosion and aluminum substrate strength

Active Publication Date: 2021-07-27
肇庆微纳芯材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing PI film cleaning agents mainly exist: (1) contain non-environmentally friendly solvents such as N-methylpyrrolidone; (2) have a strong corrosion effect on the lower aluminum substrate

Method used

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  • Polyimide stripping liquid, preparation method thereof and cleaning method of polyimide film
  • Polyimide stripping liquid, preparation method thereof and cleaning method of polyimide film
  • Polyimide stripping liquid, preparation method thereof and cleaning method of polyimide film

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Effect test

Embodiment 1-7

[0046] Embodiment 1-6 provides a kind of preparation method of polyimide peeling liquid, it is by mixing small molecular alcohol compound, alcohol ether compound, organic base, antiseptic, auxiliary agent and water, stirring for 30min, passing through 0.2μm filter element After filtration, a polyimide stripping solution was obtained.

[0047] The formula in embodiment 1-7 is as shown in table 1:

[0048] The formula composition of table 1 embodiment 1-7

[0049]

[0050]

[0051] In Table 1, alcohol 1 is 1,2-propanediol, alcohol 2 is glycerol, alcohol 3 is methanol, alcohol ether 1 is ethylene glycol phenyl ether, alcohol ether 2 is propylene glycol phenyl ether, and alcohol ether 3 is ethylene glycol Methyl ether, organic base 1 is tetramethylammonium hydroxide, organic base 2 is diethanolamine, organic base 3 is methyldiethanolamine, preservative 1 is 2-(3-chloro-4-fluorobenzyl)-1H - Benzo[d]imidazol-5-ol, anticorrosion agent 2 is 2-(3,4-dichlorobenzyl)-1H-benzo[d]im...

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Abstract

The invention discloses polyimide stripping liquid, a preparation method thereof and a cleaning method of a polyimide film, and relates to the technical field of panel display. The polyimide stripping liquid is prepared from the following components in percentage by mass of 20 to 40 percent of small molecular alcohol, 15 to 30 percent of alcohol ether compound, 0.1 to 1 percent of preservative, 1 to 10 percent of additive, 1 to 15 percent of organic alkali and 10 to 40 percent of water. The polyimide stripping liquid is prepared from the small molecular alcohol, the alcohol ether compound, the preservative, the additive, the organic alkali and the water, can effectively strip the polyimide film, basically has no corrosion effect on a lower base material, such as an aluminum base material, etc., and is suitable for popularization and application.

Description

technical field [0001] The invention relates to the technical field of flat panel display, in particular to a polyimide stripping liquid, a preparation method thereof and a cleaning method of a polyimide film. Background technique [0002] Polyimide film has been widely used as an alignment film in liquid crystal displays due to its excellent properties such as thermal stability and chemical stability, excellent mechanical properties, high insulation, excellent dielectric properties and low hygroscopicity. Commonly used methods for printing alignment films of liquid crystal displays include letterpress transfer printing and gravure transfer printing. Letterpress transfer printing mainly uses APR plates, on which there are printed graphics, which store and release solutions during printing. In this process, LCD manufacturers pay attention to the rework cleaning of unqualified PI film (polyimide film) and the removal of excess PI film from the letterpress. [0003] Usually, N...

Claims

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Application Information

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IPC IPC(8): G03F7/42
CPCG03F7/425
Inventor 李海涛
Owner 肇庆微纳芯材料科技有限公司
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