Lubricants are key processing aids in plastic production. By reducing the friction between the melt and equipment, improving processing fluidity, avoiding adhesion and material shortage issues, and enhancing product demolding and surface glossiness, they are suitable for various types of plastics such as PE, PP, PVC, as well as injection molding, extrusion, and other processes. The mainstream types are divided into four categories: fatty acids and their derivatives (such as calcium stearate) are generally balanced, esters (such as butyl stearate) focus on internal lubrication, paraffin wax (such as PE wax) enhances external lubrication, and polyether (such as PEG) also has anti-static function. In terms of application, microcrystalline paraffin anti sticking rollers are used for PE blown film, butyl stearate is added to PVC profiles to reduce processing temperature, and zinc stearate is added to PP lunch boxes to assist in demolding. The current upgrade towards low migration and environmental protection is the core of balancing production efficiency and product quality....