Standard International Trade Classification
U.S. imports of Polystyrene Plates, Sheets, Film, Foil & Strip (Non-Self-Adhesive, Unreinforced) (SITC 58223) totaled $12.2M in August 2026, imported from 34 countries.
Importers of Polystyrene Plates, Sheets, Film, Foil & Strip (Non-Self-Adhesive, Unreinforced) paid $518K in duties in August 2026, an average duty rate of 4.22% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule.
Last updated: August 2026 dataFlat forms of polystyrene — including general-purpose (GPPS) and high-impact (HIPS) grades — serve the food-service disposables, refrigerator liner, and point-of-purchase display industries, where rigidity and thermoformability are key selection criteria. The distinction between cellular (foam) and non-cellular polystyrene flat forms is a fundamental classification boundary: expanded or extruded polystyrene foam sheet is classified separately, while this heading captures solid, non-cellular film and sheet. Importers should confirm the cellular character of the product before filing, as misclassification between foam and solid sheet is a common audit finding.
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991 import shipments a month
Cellular polystyrene — such as extruded polystyrene (XPS) or expanded polystyrene (EPS) sheet — is classified under a separate foam plastics heading. Non-cellular polystyrene sheet is solid and transparent or opaque without a foam structure. Physical examination, density measurement, and manufacturer technical data sheets are the standard tools used to confirm the cellular character at entry.
Thermoformed food-service trays and cups, refrigerator interior liners, point-of-purchase display panels, and medical device packaging are the primary end-use applications. High-impact polystyrene (HIPS) is preferred where impact resistance is needed, while general-purpose polystyrene (GPPS) is chosen for clarity and rigidity in display applications.
Basic heading 234 of 465 in section 5
Basic heading 58223 · $12.2M of $27.5B
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Imports · August 2026
origin
Mexico and Canada together supply 70% of it. Czech Republic pays 10.9% duty; Canada 0.1%.
customs district
Census does not publish district detail for this classification system.
destination
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$12.2MYoY · free account
Exports
$8.4MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $149.4M of Polystyrene Plates, Sheets, Film, Foil & Strip (Non-Self-Adhesive, Unreinforced) and exported $102.9M.
Through August 2026. Source: U.S. Census Bureau.