5503.19 - Other:

This HTS category, 5503.19, covers staple fibers of nylon or other polyamides that are not carded, combed, or otherwise processed for spinning, excluding those specifically identified as aramids. These fibers are synthesized and manufactured in a staple form, meaning they are cut or broken into short lengths suitable for spinning into yarn. The key characteristic here is their synthetic origin and their unspun, unprocessed state prior to textile manufacturing.

While the parent category at 5503.1 deals with synthetic staple fibers of nylon or other polyamides, this specific subheading differentiates itself from its sibling category, 5503.11, which is exclusively for staple fibers of aramids. Therefore, 5503.19 applies to all other nylon or polyamide staple fibers that do not fall under the aramid classification. This distinction is crucial for accurate tariff application based on the specific polymer composition of the fiber.

Within this category, further subdivisions are provided to refine classification. Subcategory 5503.19.10.00 specifically addresses fibers containing 10 percent or more by weight of nylon 12, acknowledging a specific technical variation within nylon staple fibers. The remaining fibers, not meeting this specific nylon 12 content threshold, are classified under the residual category 5503.19.90.00, which encompasses all other types of nylon or polyamide staple fibers not otherwise specified.