The Effects of the Dehumidifying Membrane Dryer for the Curing Processes of Waterborne Adhesives

Abstract

Abstract:The curing processes of waterborne adhesives are in general undergone by using hot-air dryer. The hot-air dryer curing the adhesives with heat has a disadvantage of requiring high temperature over 100°C as well as curing time as long as 20 min. When it comes to the heat control, high temperature open disturbs the adhesion of substrates by extremely lowering the viscosity of the adhesives. Furthermore, the humidity resulting from the drying process makes the curing condition irregularly. In this report, dehumidifying membrane dryer was used in order to keep the curing process same by removing humidity caused by the evaporation of water during the drying process, and to shorten the curing time. Here, we compared the peel strength of attached substrates in the dehumidifying membrane dryer to find out appropriate curing condition and confirm the effects of the dehumidifying membrane.