3901.90.10.00 - Elastomeric

This HTS category, 3901.90.10.00, specifically covers "Elastomeric" polymers of ethylene in their primary forms. These are synthetic materials derived from ethylene that exhibit elastic properties, meaning they can be stretched and return to their original shape. This classification is for ethylene polymers that are not specifically covered by other, more precise subheadings within the broader category of "Other" polymers of ethylene.

The distinction from other "Other" categories lies in the inherent elastomeric nature of the material. While other subheadings might cover ethylene polymers based on their molecular weight, density, or specific modifications not leading to significant elasticity, this category is solely focused on the elastic performance of the ethylene polymer itself. The key differentiator is the material's ability to deform under stress and recover its original form, a characteristic essential for its intended applications.

As this is a leaf node, there are no further subcategories under this specific HTS code. Therefore, the classification of goods under 3901.90.10.00 relies on confirming that the ethylene polymer is presented in a primary form (e.g., granules, powders, liquids) and possesses demonstrable elastomeric properties, fitting the general description of "Other" polymers of ethylene. Examples might include certain grades of ethylene-propylene copolymers or ethylene-based thermoplastic elastomers not classified elsewhere.