What are the effects of fiberglass drying process on the application effect of sizing agent?

Migration of the impregnation agent during the drying process of the fiberglass makes it impossible to obtain a completely uniform raw fiber from the original fiber cake. Most types of fibers are heated at 105-125°C for 4-12 hours, sometimes longer. After the water is removed, continued heating will affect the flow of polymer particles between the filaments, thereby affecting the cohesion of the original fiber. Another side effect of continuous heating within the required temperature range is the loss of volatile components, such as some dibutyl phthalate, which will evaporate under this condition. For this reason, many manufacturers use intermittent drying ovens and adopt different time/temperature drying processes for different types of fiberglass. When electric drying is used, heating is terminated once the water is removed. If necessary, a second stage of drying must be carried out in a traditional forced convection heating oven, that is, the actual heating or curing process of the dried raw fiber cake.