... Continuous Sandwich Panel Line:Wall panel&Roof panel. 2.Core:PU,foam,polyfoam 3.cover:steel&color-steel,aluminum Continuous Sandwich panel production line,PU machine,color-steel facingsThe continuous production line ... or phenolic foam plastic. The thickness of the produced sandwich panel ranges ... air circulating70 Maximum rising height of the top conveyor 250 mmThe total capacity for the production ...