3904.61.00.10 - Granular, whether or not filled or compounded (see statistical note 1 to this chapter)

This HTS category, 3904.61.00.10, specifically classifies granular polytetrafluoroethylene (PTFE) that is either unfilled or compounded. This designation applies to PTFE in its granular form, meaning it is processed into small particles or pellets, making it suitable for various manufacturing processes such as molding or extrusion. The "filled or compounded" aspect indicates that while the primary material is PTFE, it may also contain additives, fillers, or other polymers blended in to modify its properties for specific applications.

Within the broader classification of fluoropolymers, this subcategory distinguishes itself from its sibling, 3904.61.00.90 "Other." While both fall under PTFE, this specific code targets the granular form. The "Other" category would encompass PTFE in forms not classified here, such as powders, dispersions, or bulk solid forms. Therefore, the key differentiator is the physical state and processing form of the PTFE.

As this is a leaf node within the HTS, there are no further subcategories to detail. Classification under this code is dependent on confirming the material is polytetrafluoroethylene and that it is presented in a granular form, whether pure or mixed with other substances as per statistical note 1 to Chapter 39. This granular form is crucial for its subsequent use in manufacturing articles like seals, coatings, electrical insulation, and various other specialized components.