5402.48.00 - Other, of polypropylene

HTS code 5402.48.00 encompasses synthetic filament yarn, excluding sewing thread, not prepared for retail sale, specifically when composed of polypropylene. This category is distinct from other single yarns at the same level by its material composition. For instance, it differs from 5402.44.00 which covers elastomeric yarns, and from the various polyester (5402.46.00.00, 5402.47) and nylon or polyamide (5402.45) classifications based on their constituent polymers.

Within this polypropylene classification, further distinctions are made to refine the categorization of the yarn's construction. The subcategories are: 5402.48.00.10 for monofilament yarns or multifilament yarns that are either untwisted or have a twist not exceeding 5 turns per meter, and 5402.48.00.70 for all other polypropylene filament yarns that do not meet the criteria for the first subcategory. These subdivisions are crucial for accurately classifying the physical form and degree of twist, which are key determinative factors in HTS classification.