What is an Extrusion Coating and Lamination Machine? An extrusion coating and lamination machine is an industrial system used to apply a "plastic raincoat" to substrates such as paper, paperboard, non-woven fabrics, woven fabrics, and aluminum foil.
Its core function can be summarized as follows: it melts plastics like polyethylene (PE) and polypropylene (PP) at high temperatures and coats them uniformly onto the substrate surface. This creates a protective film layer that provides waterproofing, moisture resistance, oil resistance, and enhanced structural strength.
Process Overview The typical workflow of an extrusion coating line follows this sequence: Unwinding → Pre-heating → Corona Treatment → Extrusion Coating → Cooling → Edge Trimming → Rewinding
Driven by a screw extruder, plastic resin pellets are heated and melted. Once extruded through the die, the molten plastic cascades down like a "waterfall" onto the substrate surface. After being hot-pressed and cooled, the plastic layer bonds securely with the substrate. The entire process is highly automated, with production line speeds reaching 100–150 meters per minute or even higher.