Styrene Expanded Polystyrene Foam Sheets
Rigid foam sheets made from expanded polystyrene (EPS), a cellular polymer of styrene, used for insulation and packaging. Classified under HTS 3921.11.00.00 as cellular plates and sheets of styrene polymers per chapter notes on polymer classification. The cellular structure provides buoyancy and thermal insulation properties.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If non-cellular or density below foam threshold
Non-cellular styrene sheets fall under 'Other plates, sheets, film' in 3920, lacking cellular structure.
If manufactured into rigid articles like boxes
Finished foam containers or articles shift to 3923 for plastic articles for transport/packing.
If cut to specific shapes for retail sale
Pre-cut foam pieces for consumer use may classify as other plastic articles in 3926.
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Import Tips & Compliance
• Verify polymer composition meets 95% styrene monomer requirement via lab testing; obtain certificates of analysis
• Ensure dimensions comply if claiming special rates under heading notes
• Watch for misclassification as non-cellular film under 3920
Related Products under HTS 3921.11.00.00
Polystyrene Foam Insulation Panels
Extruded polystyrene (XPS) foam panels designed for building wall and roof insulation. Falls under 3921.11.00.00 as cellular sheets of styrene polymers, confirmed by predominant styrene content. Provides high R-value thermal resistance.
EPS Foam Packaging Sheets
Beadboard expanded polystyrene sheets cut to size for protective packaging of electronics and appliances. Classified in 3921.11.00.00 for cellular styrene polymer sheets used in shipping. Lightweight and shock-absorbent.
Styrene Foam Board for Model Making
High-density polystyrene foam boards used by hobbyists for architectural models and crafts. Meets 3921.11.00.00 as cellular sheets of styrene polymers per weight predominance rule. Easily cut and painted.
Cellular PS Diffusion Plates
Polystyrene foam sheets engineered as light diffusion panels for LED lighting fixtures. Under 3921.11.00.00 for cellular styrene sheets with light-scattering cellular structure. Used in commercial displays.
Polystyrene Foam Underlayment Sheets
EPS foam sheets used as flooring underlayment for sound and thermal insulation beneath laminate tiles. Classified 3921.11.00.00 as cellular styrene polymer plates. Moisture-resistant grade.
Styrene Foam Sign Blanks
Extruded polystyrene foam boards sold as blanks for outdoor signage and displays. 3921.11.00.00 for cellular sheets of styrene polymers used in advertising. Weatherproof surface.