The invention provides a PVA (
Polyvinyl Alcohol) film
production line which comprises a reaction kettle, a filter group, a defoaming standing kettle group, a vacuum defoaming
machine, a precise flow pump, a
casting die head device, an annular
steel belt conveyor, a sectional type
drying box
assembly and a
winding machine, a discharging port of the filter set is connected to a feeding port of the defoaming standing kettle set through a pipeline, a discharging port of the defoaming standing kettle set is connected to a feeding port of the vacuum defoaming
machine through a pipeline, and a discharging port of the vacuum defoaming
machine is connected to a feeding port of the
casting die head device through the precise flow pump. The annular
steel belt conveyor is installed below a discharging port of the
casting die head device, the sectional type
drying box
assembly is installed on the rear section of the annular
steel belt conveyor, and the
winding machine is installed at the front end of the annular steel
belt conveyor. A complete, coherent and optimal
production line framework is formed, and the long-standing comprehensive problem that quality, efficiency and cost are difficult to consider at the same time in PVA film production is solved.