... (LDPE),high density polyethylene (HDPE)and linear low . Three layer Coextruded(rotating Haul-off)Water-cool Blown Film Lines ... screw mandrel structure with even and smooth material discharging. Up and down with converter, brand RiBo, which is from shanghai RiBo ... length cutting equipment, cooling water discharge, nip rolls, etc.three layers co-extrusion blown film machine is according to market ...