3901.20.10.00 - Having a relative viscosity of 1.44 or more

This HTS classification, 3901.20.10.00, specifically covers polyethylene resins that possess a relative viscosity of 1.44 or greater. Polyethylene, a versatile thermoplastic polymer derived from ethylene, is a fundamental material in numerous industries. Within the broader category of "Polymers of ethylene, in primary forms," and further refined to "Polyethylene having a specific gravity of 0.94 or more," this subheading targets polyethylene grades exhibiting a specific level of molecular weight and chain entanglement, indicated by their relative viscosity.

The distinction between this subheading and its sibling, 3901.20.50.00 ("Other"), lies solely in the critical parameter of relative viscosity. While both subheadings classify polyethylene with a specific gravity of 0.94 or more, 3901.20.10.00 is reserved for those that meet or exceed the 1.44 threshold, suggesting a higher molecular weight and potentially different processing characteristics and end-use applications compared to those classified under the "Other" category.

As a leaf node, there are no further subcategories. Therefore, classification into 3901.20.10.00 is determined by meeting the specific gravity requirement (0.94 or more) and demonstrating a relative viscosity of 1.44 or higher. This would typically be verified through testing and documentation provided by the manufacturer or importer.