When the plastic extrusion manufacturer begins production, raw or recycled material is melted down to be filtered. To facilitate melt flow, the melt is subjected to tremendous pressure when passing through a medium that holds several extruder screens, such as a extruder breaker plate.
As the melted plastic passes through the extruder screen, any contaminants that may cause product failure are removed, and the filtered plastic is passed along to the rest of the production process.