Studies on the Behavior of Minuscule Droplets During Drying Process

Abstract

The effect of the organic solvents which gave it to drying process of minuscule droplets of aqueous solution of the organic solvents on vinyl chloride film which is used for outdoor signboard and poster in the image formation technology by using an ink-jet printer was investigated. When the organic solvent which has penetration property into the vinyl chloride film was used, it was hard to give an effect to evaporation property of water in aqueous solution of that organic solvent due to penetration of that organic solvent was started after water was evaporated. On the other hand, when the organic solvent which has no penetration property into the vinyl chloride film and evaporation rate is lower than that of water was used, it was easy to give an effect to evaporation property of water in aqueous solution of that organic solvent due to surface area of droplet increased if it has an effect to lower the contact angle of aqueous solution of that organic solvent for vinyl chloride film. Additionally, When the organic solvent which has no penetration property into the vinyl chloride film and evaporation rate is higher than that of water, it was hard to give an effect to evaporation property of water in aqueous solution of the organic solvent even if the organic solvent which has an effect to give lower contact angle on vinyl chloride film due to the effect was difficult to maintain by it' s higher evaporation rate than water.