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HS Code 3920 covers non-cellular, non-reinforced plates, sheets, film, foil, and strip of plastics. The classification is organized by polymer type, with detailed subcategories for each (3920.10-3920.99). This fundamental category provides plastic films and sheets for applications including packaging, construction, electrical insulation, and agricultural films. Products range from simple polyethylene films to specialized barrier materials with multiple layers and performance coatings. Technical specifications focus on thickness tolerance, optical properties, barrier characteristics, and mechanical strength. Unlike reinforced or foam plastic sheets (HS 3921), these homogeneous materials represent pure polymer processing capabilities. This division supports numerous downstream converting operations appearing in other HS codes.