The polyamine solution after bubbles is pressed into the storage tank on the front of the front machine by the stainless steel solution storage tank. The steel belt runs at a constant speed in the direction shown in the figure. The solution in the storage groove is taken away through the water saliva, and the liquid film with a uniform thickness is formed, and then the drying channel is dry. The clean and dry air is sent into the upper and lower bakers from the heater to a heater to a certain temperature. The hot air flow direction is opposite to the direction of the steel band, so that the temperature of the liquid film gradually increases when drying, and the solvent gradually volatilizes, increasing the drying effect.
The polyamic acid thin film runs on the steel zone for a week. The solvent evaporates into a solid film, and the thin film peeled from the steel belt is led to the amine furnace through the guidance roller. The amine furnace is generally in the form of multi -roller. The guide roller with the synchronous speed of the drooling machine guides the polyamide film into the amine furnace. After the high temperature amine, the roll is closed by the closure machine.