Screens commonly referred, For extruders to as screen packs, Are wire mesh employed for filtration in plastic extrusion processes . They are crucial components for removing contaminants from molten plastic prior to being molded into the finished item contaminants can and even, Include gels metal flakes, Unmelted resin particles. If these contaminants are not removed, They can cause defects in the finished product such as streaks, Discoloration, And weak spots.