Cleaning process using organic solvents

Organic solvent cleaning agent (ultrasonic) - water-based cleaning agent (ultrasonic) - municipal water rinse - pure water rinse - IPA (isopropanol) dehydration - IPA slow pull drying. The main use of organic solvent cleaning agents is to clean asphalt and paint chips. Previously, solvent cleaning agents mostly used trichloroethylene or trichloroethylene. Due to the fact that trichloroethane is an ODS (ozone depleting substance) product, it is currently in the mandatory phase out stage; Long term use of trichloroethylene can easily lead to occupational diseases, and due to its instability, trichloroethylene is prone to hydrolysis and becomes acidic, which can corrode lenses and equipment. In response, domestic cleaning agent manufacturers have developed and produced a series of non ODS solvent based cleaning agents that can be used to clean optical glass; And this series of products has different physical and chemical indicators, which can effectively meet the requirements of different equipment and process conditions. For example, in the production process of a few enterprises, there is a layer of difficult to treat lacquer on the surface of the lens, which requires the use of organic solvents with special solubility; Some enterprises require the use of organic solvents with slow evaporation due to the limited number of condenser tubes in the solvent cleaning tank of their cleaning equipment, resulting in a short free path; Another group of companies, on the contrary, require the use of organic solvents that evaporate quickly.