... 20mm, environment frie PP PE PC Hollow profile extrusion machine, hollow sunlight board extrusion line.Width 2100mm, thickness 2 ... energy saving. PP PE PC Hollow profile sheet extrusion machine, or Hollow board extrusion line, also called PC hollow ... sunlight board extrusion machine. Sunlight board has the property of high transparency, light weight, impact resistance, sound insulation, heat insulation ...