3921.11.00.00 - Of polymers of styrene

This HTS category, 3921.11.00.00, specifically classifies cellular plates, sheets, film, foil, and strip made from polymers of styrene. These materials are characterized by the presence of a cellular structure, meaning they contain a network of gas-filled cells or pores within the plastic matrix. This cellular construction often imparts properties such as lightness, insulation, and cushioning. Examples include expanded polystyrene (EPS) foam sheets used for packaging or insulation, and extruded polystyrene foam boards.

It is important to distinguish this category from its siblings, which cover cellular forms of other plastic polymers. For instance, 3921.12 pertains to cellular materials derived from polymers of vinyl chloride, while 3921.13 covers those made from polyurethanes. Similarly, 3921.14.00.00 deals with cellular regenerated cellulose, and 3921.19.00 encompasses cellular products made from any other plastics not elsewhere specified. The defining factor for classification under 3921.11.00.00 is the primary polymeric component being a styrene-based plastic.

As this is a leaf node, there are no further subcategories within 3921.11.00.00. The classification is therefore determined solely by whether the cellular plates, sheets, film, foil, or strip are indeed manufactured from polymers of styrene. The nature of the cellular structure (e.g., closed-cell or open-cell) and the specific form (sheet, film, etc.) are implicitly covered under this broad designation, as long as the styrene polymer base is confirmed.