XPS sheet extruder

XPS sheet extruder ,in the XPS process,it uses newly or recycled polystyrene pellets;commonly needs to add color masterbatch or flame-retardant agent,etc,feed the mixed materials into 1st stage extrusion system.for melt plasticzing and blending;the extruders pump the melted material though net exchanger after the foaming agent is injected and homogenized in the primary extruder;