5402.34 - Of polypropylene:

This HTS category, 5402.34, specifically classifies textured synthetic filament yarn made from polypropylene. Textured yarn is characterized by modifications to its structure to impart bulk, stretch, or a crimped appearance, differentiating it from smooth filament yarn. This category applies exclusively to yarns that are not put up for retail sale, and it encompasses both synthetic monofilament yarns of less than 67 decitex and multifilament yarns.

When classifying textured yarn, it is crucial to distinguish 5402.34 from its siblings based on the constituent material. While 5402.31 and 5402.32 cover textured yarns of nylon or other polyamides, and 5402.33 pertains to polyesters, this specific heading is reserved for polypropylene. Category 5402.39 serves as a residual heading for textured yarns of other synthetic materials not otherwise specified.

Within HTS 5402.34, further subdivisions exist to differentiate based on yarn construction. The subcategories 5402.34.30.00 and 5402.34.60.00 distinguish between single yarns and multiple (folded) or cabled yarns, respectively. This distinction is important for accurately reflecting the structure and intended application of the polypropylene textured filament yarn.