Water based cleaning liquid for LCD

Abstract

This invention relates to a water-borne cleaning liquid for liquid crystal displays. The cleaning liquid comprises: one of triethanolamine, diethanolamine and hydroxyethyl ethlenediamine 15-65 wt.%, JFC 10-45 wt.%, peregal or OP nonionic surfactant 10-20 wt.%, and deionized water. The organic base can decompose organic matters, thus can remove the residues on the surface of the products and increase the surface smoothness of the products. The cleaning liquid has such advantages as no toxicity, no harm to human body, good flame retardancy, no explosion and high safety. The cleaning liquid has good cleaning effect on particles, organic films and grease.

Description

technical field [0001] The invention relates to a water-based cleaning solution, in particular to an LCD (liquid crystal display) water-based cleaning solution. Background technique [0002] LCD cleaning solution is used to remove liquid crystal residues in the cracks of the LCD screen. There are three types of LCD cleaning agents: water-based cleaning agent, semi-aqueous cleaning agent, and solvent cleaning agent. Water-based and semi-aqueous cleaning agents are suitable for ultrasonic water cleaning process routes, and solvent cleaning agents are suitable for gas-phase ultrasonic cleaning process routes. Semi-aqueous and solvent-based cleaners dissolve liquid crystals. The water-based cleaning agent in the existing ultrasonic washing process is composed of inorganic alkali and some hydrocarbons. The inorganic alkali and organic matter are not miscible, so there will be residues after cleaning, which will affect the cleanliness of the LCD surface. And some components enda...

AI Technical Summary

Problems solved by technology

The water-based cleaning agent in the existing ultrasonic washing process is composed of inorganic alkali and some hydrocarbons. The inorganic alkali and organic matter are not miscible, so there will be residues after cleaning, which will affect the cleanliness of the LCD surface

And some components endanger the health of workers

Water-based cleaning to remove residual LCD liquid crystals is mainly based on the emulsification of surfactants and liquid crystals. The emulsification is more dependent on ultrasound, because the surface tension of water is greater than that of solvents, and the wetting performance of the slit is poor.

At present, ODS cleaning agents such as CFC-113 have been eliminated internationally, and some semi-water-based cleaning agents also have many problems such as recycling.