5505.10.00.40 - Of polyesters

This HTS category, 5505.10.00.40, specifically covers waste materials derived from polyester staple fibers. This includes noils, yarn waste, and garnetted stock that are predominantly composed of synthetic polyester fibers. These materials are typically generated during the manufacturing process of polyester fibers, yarns, or fabrics, and are then collected for reprocessing, recycling, or other secondary uses.

It is crucial to distinguish this category from its siblings. The sibling category 5505.10.00.20 pertains to waste of nylon or other polyamides, which are chemically distinct synthetic polymers. The sibling category 5505.10.00.60, "Other," serves as a residual category for synthetic fiber waste not specifically covered by the polyester or polyamide classifications. Therefore, accurate classification relies on identifying the primary synthetic fiber composition of the waste material.

As this is a leaf node within the HTS, there are no further subcategories for this specific code. Classification within 5505.10.00.40 is determined by the confirmed presence of polyester staple fiber waste. Practical classification will involve examining the material's origin, physical characteristics, and any available laboratory analysis confirming its polyester content, distinguishing it from other synthetic fiber waste streams.